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SECTION 04811 - Masonry Institute of Michigan

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SECTION 04811 - Masonry Institute of Michigan

    SECTION 04 22 00.01

    CONCRETE MASONRY ASSEMBLIES

    (SINGLE WYTHE CMU)

    PART 1 GENERAL

    1.1 SUMMARY

    A. This Section includes the following masonry assemblies:

    1. Concrete masonry units (CMU).

    2. Decorative concrete masonry units (DCMU).

    3. Mortar and grout.

    4. Flashing.

    5. Insulation materials.

    6. Masonry accessories.

    7. Cleaning materials.

    8. Post-cleaning field-applied water repellants.

    B. Related Work:

    1. Division 01 Section ALLOWANCES for testing and inspection allowances, masonry unit

    allowances.

    2. Division 05 Section METAL FABRICATIONS for steel lintels.

    3. Division 07 Section JOINT SEALANTS for sealants and backer rods.

C. Products installed but not furnished.

    1. Steel lintels for unit masonry are specified in Division 5 Section - Metal Fabrications.

    2. Hollow metal frames are specified in Division 8 Section - Hollow Metal Doors and

    Frames.

    1.2 SUBMITTALS

    A. Product Data: For each indicated product.

    B. Samples: For types and colors of masonry units and pigmented mortar. C. Material Certificates: For each type of indicated product (including self-consolidating grout),

    include statement of properties, and compliance with these Specifications. Include mix design for

    mortar and grout.

    D. Masonry Material Cleaning Plan: Include products and techniques for cleaning each masonry

    product of the assembly and the combined masonry assembly. Prior to submission, the plan shall

    be signed and approved by:

    1. General Contractor/Construction Manager

    2. Mason Contractor

    3. All Masonry Unit Manufacturers

    4. Cleaning Materials Supplier and Manufacturer

    5. Cleaning Subcontractor

    E. Construction procedures for cold and hot weather.

     Page 1 of 14 Concrete Masonry Assemblies (Single Wythe CMU)

    April 2010 Section 04 22 00.01

    The decision to utilize this information is not within the purview of the MIM, and persons making use of this information do so at their own risk. MIM makes no representation or warranties, expressed or implied, with respect to the accuracy or suitability of this information. MIM and its members disclaim liability for damages of any kind, including any special, indirect, incidental, or consequential damages, which may result from the use of this information. This information is not to be interpreted as indicating compliance with, or waiver of, any provision of any applicable building code, ordinance, standard or law.

F. Wall bracing plan showing braces and delineating the restricted zones.

    1.3 QUALITY ASSURANCE

    A. Masonry Inspection:

    530/ASCE 5/TMS 402, Section 1.15 for Quality Assurance Program requirements, and

    Tables 1.15.1, 1.15.2, & 1.15.3. Also, review Michigan Building Code, Chapter 17, Section

    1704.5 and Tables 1704.5.1 & 1704.5.3. Edit as required. >

    1. Level C: Continuous inspection.

    2. Level B: Periodic inspection.

    glass units; Non-essential facilities with engineered design.>

    3. Level A: Submission review only.

    design/veneers/or glass units.>

    B. Masonry construction and materials shall conform to the requirements of “Specifications for

    Masonry Structures (ACI 530.1/ASCE 6/TMS 602)” published by The Masonry Society, the

    American Concrete Institute, and the American Society of Civil Engineers, except as modified by

    the requirements of these contract documents.

    C. <Coordinate with 01400> Pre-construction Testing: Owner shall employ a qualified independent

    masonry testing agency to perform the following tests. The Owner shall pay testing agency.

     materials in reasonable quantities for testing. Laboratory Technician Contractor shall provide

    shall be certified per ASTM C 1093.

    1. Grout: Compressive strength tests per ASTM C 1019. Additionally, grout samples shall

    be obtained using molds that simulate the units used in the construction (cardboard forms

    shall not be utilized). <NOTE: Only required when the grout mix is specified by the

    “Specified Compressive Strength” method in section 2.8C2b..>

    2. Self-consolidating grout: Compressive strength tests per ASTM C1019 and slump flow

    and visual stability index per ASTM C1611.

    3.

    specifier.> Mortar: Mortar aggregate ratio tests per ASTM C780, Annex 4. D. Fire Ratings: Fire rated concrete masonry units shall be in compliance when:

    1. The masonry has been certified through the equivalent thickness method contained in

    Chapter 3 of ACI 216.1 for concrete masonry and Chapter 5 for effects of finish materials. E. Mock-Up Panels: Construct mock-up panels for each type of masonry construction of typical

    walls for Architect‟s approval. Size shall be no less than 48 inches wide by at least 48 inches high.

    Include flashing details, reinforcements, weeps, vents, cleaning techniques, etc. Panels shall

    establish the minimum quality for the project. Panels shall be removed upon approved acceptance

    of masonry work or if panel is not approved. Panels may be a permanent part of the walls if

    approved, coordinate locations with Architect.

    F. Temporary Bracing: Comply with Mason Contractors Association of America‟s Standard Practice

    for Bracing Masonry Walls Under Construction, and Masonry Wall Bracing Design Handbook,

    published by the Mason Contractors Association of America.

    G. <NOTE: The following section shall be included or deleted at the discretion of the specifier>

    Workshop Certificates: Tradesmen performing flashing operations, placement of grouted

    reinforced masonry, and masonry cleaning shall hold current workshop certificates from the

    Masonry Institute of Michigan (www.mim-online.org) or the International Masonry Institute

    (www.imiweb.org), and an awareness certificate for MV-Tech (www.mvtechonline.com).

     Page 2 of 14 Concrete Masonry Assemblies (Single Wythe CMU)

    April 2010 Section 04 22 00.01

    The decision to utilize this information is not within the purview of the MIM, and persons making use of this information do so at their own risk. MIM makes no representation or warranties, expressed or implied, with respect to the accuracy or suitability of this information. MIM and its members disclaim liability for damages of any kind, including any special, indirect, incidental, or consequential damages, which may result from the use of this information. This information is not to be interpreted as indicating compliance with, or waiver of, any provision of any applicable building code, ordinance, standard or law.

    1.4 DELIVERY, STORAGE, AND HANDLING

    A. Store aggregates on grades such that site drainage will not contaminate aggregates. B. Store masonry units, cementitous materials, and accessories on elevated platforms in a dry

    location. Materials shall be kept covered with weatherproof sheeting and secured from the wind.

    Do not use saturated materials per NCMA TEK Note 3-1B.

    1.5 PROJECT CONDITIONS

    A. Cold Weather Requirements: When ambient temperature is below 40 degrees Fahrenheit,

    implement cold weather procedures. Comply with ACI 530.1/ASCE 6/TMS 602 Specification

    requirements. Provide approved admixtures only.

    B. Hot Weather Requirements: When ambient temperatures during construction or during the

    protection period are greater than 100 degrees Fahrenheit, or are greater than 90 degrees

    Fahrenheit with a wind velocity greater than 8 miles per hour, comply with ACI 530.1/ASCE

    6/TMS 602 Specification requirements. Provide approved admixtures only.

    1.6 MASONRY PRE-CONSTRUCTION CONFERENCE

    A. Masonry Pre-Construction Conference <Edit for GC or CM; Architect or Engineer>

    1. The [General Contractor] [Construction Manager] in conjunction with the [Architect]

    [Engineer] shall schedule a Masonry Pre-Construction Conference at the jobsite at

    approximately 3 weeks prior to start of masonry work at the site.

    2. All contractor submissions shall be submitted to the [Architect] [Engineer] and

    reviewed prior to this conference.

    3. Responsible assigned parties of the participants shall attend the conference. The

    [General Contractor] [Construction Manager] shall prepare and issue minutes of the

    meeting to all parties concerned.

    4. Masonry work may not proceed without the Masonry Pre-Construction Conference.

    5. Participants, representatives from:

    Owner

    [Architect] [Engineer]

    [General Contractor] [Construction Manager]

    Project Superintendent

    Mason Contractor Mason Foreman

    Masonry Inspector >

    Self-Consolidating Grout Supplier

    Testing Laboratory

    B. The following is the agenda for the Masonry Pre-Construction Conference:

    1. Review Contract Documents for Mason‟s clarifications, [Architect’s] [Engineer’s]

    intent, and Masonry Inspector responsibilities.

    “Quality Assurance”>

    a. [Architect’s] [Engineer’s] summary for typical/atypical aspects of the Project.

    b. Locations of shear walls.

    c. Locations of CMU control joints.

    d. Contractor‟s concern for missing/incomplete details.

    e. Verify use of up-to-date plans/specifications.

    f. Contractor‟s responsibility for temporary wall bracing.

    g. Installation procedures.

    h. Integral water repellants and post-cleaning field-applied water repellants.

    i. Coordination issues with other trades.

     Page 3 of 14 Concrete Masonry Assemblies (Single Wythe CMU)

    April 2010 Section 04 22 00.01

    The decision to utilize this information is not within the purview of the MIM, and persons making use of this information do so at their own risk. MIM makes no representation or warranties, expressed or implied, with respect to the accuracy or suitability of this information. MIM and its members disclaim liability for damages of any kind, including any special, indirect, incidental, or consequential damages, which may result from the use of this information. This information is not to be interpreted as indicating compliance with, or waiver of, any provision of any applicable building code, ordinance, standard or law.

    j. Protection of and scheduling of non-masonry construction that will interfere

    with masonry work.

    k. Open issues/concerns.

    l. Job-Site storage and staging areas.

    2. Submittal issues. <NOTE: All of these items supposedly have already been reviewed,

    approved, or approved as noted. Intent is to only re-hash the submittal items and

    clarify any areas of confusion.>

    a. Mortar type, proportions and mix design.

    1) Specific locations/applications for different mortars.

    2) Regional and recycled content credits (LEED?) or other green building

    rating programs.

    b. Grout type, proportions and mix design.

    1) Specific locations/applications for different grouts.

    2) Regional and recycled content credits (LEED?) or other green building

    rating programs.

    c. Review manufacturer‟s literature for special requirements and conditions of use.

    d. Review joint reinforcement and accessories shop drawings.

    e. Review Vertical and Horizontal Reinforcing Steel shop drawings, splice lengths,

    column reinforcement and ties, and bar positioners.

    f. Lintels, door frames and other „built-ins‟ materials status.

    g. Review steel lintel shop drawings.

    h. Review flashing details.

    i. Review certificates of compliance.

    j. Review each type and size of anchor, tie, and metal accessory.

    k. Review specific ASTM Standards.

    l. Review certificate(s) for flashing, grouting and cleaning workshops.

    m. Review the approved masonry material cleaning plan. 3. Verify material samples that have been reviewed/accepted.

    a. Color ranges.

    b. Textures.

    c. Finishes.

    d. Dimensions of units.

    e. Mortar (pigmented).

    4. Review/critique [Mock-up] [Sample] Panel.

    a. Dimensions.

    b. Flashings details.

    c. Joint details.

    d. Bond pattern(s).

    e. Mortar spreading procedures.

    f. Workmanship and detailing.

    g. Cleaning.

    5. Review grout demonstration panel (if applicable).

    6. Verify that required pre-construction tests have been performed and are acceptable to the

    [Architect] [Engineer].

    a. Mortar and grout tests.

    b. Masonry units.

    c. Prism testing.

    7. Review contractor‟s proposed cold and hot weather construction procedures and Project

    Specification requirements.

    8. Review masonry inspection requirements level.

     Page 4 of 14 Concrete Masonry Assemblies (Single Wythe CMU)

    April 2010 Section 04 22 00.01

    The decision to utilize this information is not within the purview of the MIM, and persons making use of this information do so at their own risk. MIM makes no representation or warranties, expressed or implied, with respect to the accuracy or suitability of this information. MIM and its members disclaim liability for damages of any kind, including any special, indirect, incidental, or consequential damages, which may result from the use of this information. This information is not to be interpreted as indicating compliance with, or waiver of, any provision of any applicable building code, ordinance, standard or law.

    PART 2 PRODUCTS

    2.1 CONCRETE MASONRY UNITS

    A. Concrete Masonry Units (CMU): ASTM C 90, lightweight, medium weight, and normal weight.

    1. Exterior walls shall utilize normal or medium weight units.

    2. Interior walls shall utilize medium or lightweight units.

    3. Size: Specified size to be 3/8 inches less than the nominal width, height and length.

    4. Provide special shapes for lintels, corners, jambs, sashes, movement joints, bond beams,

    and other special conditions as indicated on the Drawings.

    B. Decorative Concrete Masonry Units (DCMU): ASTM C 90, normal weight or medium weight.

    1. Size: Specified size to be 3/8 inches less than the nominal width, height and length.

    2. Provide special shapes for lintels, corners, jambs, sashes, movement joints, bond beams,

    and other special conditions as indicated on the Drawings.

    3. Integral Water Repellant: Provide units made with integral water repellant admixture for

    exposed exterior units. DCMU manufacturer shall be certified by water repellant

    manufacturer to produce water repellant DCMU. DCMU manufacturer shall certify that

    the DCMU has been manufactured with integral water repellant at dosage rate

    proportioned per integral water repellant manufacturer‟s recommendations to achieve

    moisture control.

    4. Integral Color: ASTM C 979

    <NOTE: Make color selection(s)> All like units shall be supplied from a single run for

    color consistency.

    5. Pattern and Texture for DCMU:

    a. Standard, smooth finish.

    b. Split-faced.

    c. Fluted.

    d. Scored.

    e. Striated.

    f. Ground-Face (burnished).

    g. Other. <Specify>

    C. Masonry Lintels: Field assembled CMU in color, pattern, size and texture matching adjacent

    CMU wall, with reinforcing bars as indicated, placed and filled with grout, or as otherwise noted.

    D. Precast Masonry Lintels: Precast units matching concrete unit masonry with reinforcing bars

    indicated or required to support intended loads, ASTM C 1623.

    E. Precast Concrete Lintels: Precast concrete lintels with reinforcing bars indicated or required to

    support intended loads, ACI 318.

    2.2 MORTAR AND GROUT MATERIALS

    A. Contractor shall select one of the following cement options for mortar:

    1. Masonry Cement: ASTM C 91.

    2. Mortar Cement: ASTM C 1329.

    3. Portland Cement-Lime:

    a. Portland Cement: ASTM C150, Types I or II, except Type III may be used when

    temperature is below 40 degrees Fahrenheit during construction. Provide natural

    (gray) or white colored cement as required to produce mortar color indicated.

    b. Blended Cement: ASTM C595, Types IS(<70) or IP.

     Page 5 of 14 Concrete Masonry Assemblies (Single Wythe CMU)

    April 2010 Section 04 22 00.01

    The decision to utilize this information is not within the purview of the MIM, and persons making use of this information do so at their own risk. MIM makes no representation or warranties, expressed or implied, with respect to the accuracy or suitability of this information. MIM and its members disclaim liability for damages of any kind, including any special, indirect, incidental, or consequential damages, which may result from the use of this information. This information is not to be interpreted as indicating compliance with, or waiver of, any provision of any applicable building code, ordinance, standard or law.

    c. Hydraulic Cement: ATM C1157, Type GU, except Type HE may be used when

    temperature is below 40 degrees Fahrenheit during construction.

    d. Hydrated Lime: ASTM C 207, Type S.

B. Contractor shall select one of the following cement options for grout:

    1. Portland cement: ASTM C150, Types I or II, except Type III may be used when the

    temperature is below 40 degrees Fahrenheit during construction.

    2. Blended cement: ASTM C595, Types IS(<70) or IP .

    3. Hydraulic cement: ASTM C1157, Type GU, except Type HE may be used when the

    temperature is below 40 degrees Fahrenheit during construction.

    4. Combinations of cementitious materials that include portland cement and supplementary

    cementitious materials (SCMs) in accordance with the following:

    a. Ground Granulated Blast Furnace Slag (GGBFS or Slag Cement): ASTM C989.

    The cement slag replacement may be equal to up to 95% slag cement. The slag

    cement shall consist of either Grades 80, 100 or 120.

    b. Fly Ash: ASTM C618. The fly ash replacement may be equal to up to 40% fly

    ash replacement. The fly ash shall consist of either Class C or F.

    c. SCM‟s shall not be blended by the ready mixed grout supplier without the

    purchaser‟s approval. The SCM percentage(s) shall be indicated on the batch

    ticket(s).

    

    recovered industrial byproducts. Using recycled materials supports sustainable construction

    practices and contributes toward credits in LEED? or other green building rating programs.

    While such grouts may exhibit lower early compressive strengths (1- to7- day range), the

    strengths at 28 days and beyond are typically equal to or greater than those of grout

    containing portland cement as the only binder. Request information on C1157 cement from

    the manufacturer to document applicability toward LEED? or other green building rating

    programs.>

    <Delete the following paragraph if no pigmented mortar is specified and natural color

    mortar is desired>

    B. Mortar Pigments: ASTM C 979, mineral oxides, compounded for use in mortar mixes. Use only

    pigments with a record of satisfactory performance in masonry mortar.

    1. Formulate blend as required to produce color .

    C. Aggregate for Mortar: ASTM C 144.

    D. Aggregate for Grout: ASTM C 404.

    E. Admixtures: Comply with ASTM C 1384, containing not more than 0.2 percent chloride ions, and

    as recommended by the manufacturer:

    1. Integral Water Repellant Admixture for Mortar: Water repellant mortar admixture

    intended for use with CMU with integral water repellant. Manufacturer shall be the same

    as that used for CMU integral water repellant as indicated above.

    2. Admixture for Grout: As approved by Architect.

    3. Other Admixtures: As approved by Architect.

    F. Water: Potable, clean and free of deleterious materials.

    2.3 REINFORCEMENTS

A. Deformed Reinforcing Bars: ASTM A 615/A 615M, Grade 60.

     Page 6 of 14 Concrete Masonry Assemblies (Single Wythe CMU)

    April 2010 Section 04 22 00.01

    The decision to utilize this information is not within the purview of the MIM, and persons making use of this information do so at their own risk. MIM makes no representation or warranties, expressed or implied, with respect to the accuracy or suitability of this information. MIM and its members disclaim liability for damages of any kind, including any special, indirect, incidental, or consequential damages, which may result from the use of this information. This information is not to be interpreted as indicating compliance with, or waiver of, any provision of any applicable building code, ordinance, standard or law.

B. Masonry Joint Reinforcement, General: ASTM A 951.

    1. Interior Walls: Mill galvanized, ASTM A 641 (0.10 ounces per square foot), carbon steel.

    2. Exterior Walls: Hot dip galvanized, ASTM A 153 Class B-2 (1.50 ounces per square

    foot), carbon steel.

    3. Swimming Pool, Spa or other High Humidity Walls, and Chemical Storage Room Walls:

    Stainless steel, ASTM A 580 Type 304 or ASTM A153 Class B-2.

    4. Wire Size and Side Rods: W1.7 or 0.148 inch diameter (9 gauge).

    5. Wire Size for Cross Rods: W1.7 or 0.148 inch diameter (9 gauge).

    6. Wire Size for Veneer Ties: W2.8 or 0.1875 inch diameter (3/16 inch).

    7. Spacing for Cross Rods: 16 inches on center.

    8. Provide in lengths of not less than 10 feet.

    C. Masonry Joint Reinforcement: Ladder type with single pair of side rods.

    2.4 EMBEDDED FLASHING SYSTEM MATERIALS

    A. Metal Drip Edges: ASTM A 167, Type 304, stainless steel, 0.0156 inches thick.

    1. Metal Configuration: Extend at least 3 inches horizontally into wall and 1/2 inch out

    from exterior face of wall with outer edge bent down 30 degrees and hemmed.

    2. Sealant: One part non-skinning butyl sealant conforming to ASTM C 1311. B. Flexible Membrane Flashing: For membrane flashing not exposed to the exterior, provide one of

    the following:

    1. Copper-Laminated Flashing: 5 ounces per square foot copper bonded with asphalt

    between 2 layers of glass-fiber cloth.

    2. Rubberized-Asphalt Flashing: Composite bonded flashing product of a rubberized-

    asphalt adhesive compound, bonded to a high-density, cross-laminated polyethylene film

    to produce an overall thickness of not less than 0.040 inch.

    3. Elastromeric Thermoplastic Flashing: Composite of rubberized-asphalt adhesive, 0.025

    inch thick, bonded to a polyester-reinforced ethylene interpolymer alloy.

    4. EPDM Flashing: ASTM D 4637, ethylene-propylene-diene terpolymer, 0.040 inches

    thick.

    5. Adhesives, Primers, Sealants, and Seam Tapes for Flexible Membrane Flashings:

    Provide manufacturer‟s recommended compatible products.

    C. Single Wythe Pan Flashing System:

    1. System of CMU flashing pans and interlocking CMU web bridges made from high-

    density polyethylene incorporating chemical stabilizers that resist ultra-violet degradation.

    Flashing pans laid in CMU bed joints have integral weep spouts extending from the

    center to each pan to the outside face of the CMU to reduce mortar clogging, collect and

    divert moisture to the exterior. Comply with ASTM E 514.

    D. Weep/Vent: <Specify one of the following products/methods>:

    1. Partially Open Head Joint.

    2. Rectangular Plastic Weep/Vent: Clear butyrate, 3/8 inch wide by 1-1/2 inches high by

    depth of face shell less 1/8 inch.

    3. Mesh Weep/Vent: Free-draining polyethylene strand mesh, 3/8 inch wide by 1-1/2 inch

    high by depth of face shell less 1/8 inch. (For 100 percent solid units, the depth shall be

    the depth of the unit less 1/8 inch.) Color to match mortar.

     Page 7 of 14 Concrete Masonry Assemblies (Single Wythe CMU)

    April 2010 Section 04 22 00.01

    The decision to utilize this information is not within the purview of the MIM, and persons making use of this information do so at their own risk. MIM makes no representation or warranties, expressed or implied, with respect to the accuracy or suitability of this information. MIM and its members disclaim liability for damages of any kind, including any special, indirect, incidental, or consequential damages, which may result from the use of this information. This information is not to be interpreted as indicating compliance with, or waiver of, any provision of any applicable building code, ordinance, standard or law.

    4. Cellular Plastic Weep/Vent: One-piece, flexible extrusion made of UV-resistant

    polypropylene copolymer, 3/8 inches wide by 1-1/2 inches high by depth of face shell

    less 1/8 inch. (For 100 percent solid units, the depth shall be the depth of the unit less 1/8

     Color to match mortar. inch.)

    E. Cavity Drainage Material: Provide the following:

    1. Pea Gravel: Clean, hard, durable free-flowing naturally rounded particle of rock, free of

    clay, silt, and fine particles, with 100 percent passing a 3/8 inch sieve and not over 5

    percent passing a No. 8 sieve.

    2.5 INSULATION MATERIALS

    A. Insulation: Provide one of the following:

    1. Loose Granular Fill Insulation: Provide granular asphalt coated vermiculite loose-fill

    insulation in accordance with ASTM C 516, Type II or perlite loose-fill insulation in

    accordance with ASTM C 549, Type II (surface treated for water repellency and moisture

    absorption).

    2. Molded Polystyrene Insulation Insert Units: Expanded Polystyrene Masonry Insulation:

    Individually molded to fit CMU core profile, 1.0 pounds per cubic foot minimum density

    and maximum water vapor transmission of 1.4 perm inch, and conforming to ASTM C

    578, for width indicated.

    2.6 MISCELLANEOUS ACCESSORIES

    A. Connectors at Intersecting Shear Walls (not applicable at corners):

    1. Rigid Z-strap Anchors: Fabricate from ASTM A 36 steel bars, 1-1/2 inches by 1/4 inch

    by 24 inches long with ends turned up 2 inches (total 28 inches in length). B. Connectors for Intersecting Non-Shear Walls (not applicable at corners):

    1. Wire Mesh Ties: Fabricate from 1/2 inch by 1/2 inch mesh, 16 gauge, in width 2 inches

    less than nominal thickness of the CMU wythe and length not less than 14 inches. Hot

    dip galvanized, ASTM A 153 Class B-2.

    C. Flexible Anchors: Where masonry is to be laterally supported from structural steel provide

    flexible anchors consisting of two different components as follows:

    1. Receiver Component: 1/4 inch diameter steel rod with 3/8 inch offset or 12 gauge

    galvanized steel straps and 4 inch adjustment for ties specified below. Zinc coated,

    ASTM A 641 (0.10 ounces per square foot, carbon steel).

    2. Triangular Ties: 3/16 inch diameter steel wire, ASTM A 82. Tie length shall extend at

    least halfway through unit but with at least 5/8 inch cover on outside face. Closed end

    shall be 1 inch wide and split-end opening shall be 1/2 inch. Hot dip galvanized, ASTM

    A 153 Class B-2 (1.5 ounces per square foot, carbon steel).

    D. Preformed Control Joint Gasket: Cross shape of flexible rubber or PVC with shear key to fit into

    sash block grooves and minimum 1 inch flanges.

    1. PVC complying with ASTM D 2287 (Type PVC 654-4).

    2. Rubber complying with ASTM D 2000 2AA-805.

    E. Bond-Breaker Strips: Asphalt saturated, organic roofing felt complying with ASTM D 226, Type

    I (No. 15 asphalt felt). <As typically used in the “Michigan Control Joint”>

     Page 8 of 14 Concrete Masonry Assemblies (Single Wythe CMU)

    April 2010 Section 04 22 00.01

    The decision to utilize this information is not within the purview of the MIM, and persons making use of this information do so at their own risk. MIM makes no representation or warranties, expressed or implied, with respect to the accuracy or suitability of this information. MIM and its members disclaim liability for damages of any kind, including any special, indirect, incidental, or consequential damages, which may result from the use of this information. This information is not to be interpreted as indicating compliance with, or waiver of, any provision of any applicable building code, ordinance, standard or law.

    F. Grout Retainer: Mesh screen, width of CMU less 1 inch. Use at bottom of horizontal grout cell to

    retain grout without the use of special shaped CMUs, and without breaking the mortar bond. G. Post-Cleaning Field-Applied Water Repellant: Concrete Masonry Unit manufacturer‟s

    recommended water repellant, compatible with integral water repellant.

    H. Field-Applied Surface Conditioner for Ground-Face (Burnished) Concrete Masonry Units:

    Ground-Face Concrete Masonry Unit manufacturer‟s recommended surface conditioner,

    compatible with integral water repellant.

    I. Masonry Cleaners: Proprietary cleaner(s) for the appropriate masonry surface as recommended by

    the masonry material manufacturers and as stated in the approved Masonry Material Cleaning Plan. J. Compressible Filler: Filler strips conforming to ASTM D 1056, Class 2A1, 25 percent oversized

    in thickness. Width shall match the masonry wythe minus 1/2 inch.

    2.7 MORTAR AND GROUT MIXES

    A. General: Specified admixtures may be provided as indicated below. If admixture is used, add at

    same rate for all exposed mortar to ensure consistent mortar color, regardless of weather. Test for

    compatibility with other products and assemblies.

    B. Mortar Mix: ASTM C 270, Proportion Specification.

    1. Type M or S for masonry below grade or in contact with earth.

    2. Type S for masonry above grade.

    3. Admixture: Specified mortar admixtures.

    4. Pigmented Mortar: Use colored cement product or select and proportion pigments with

    other ingredients to produce selected color. Do not add pigments to colored cement

    products.

    a. Pigments shall not exceed 10 percent of Portland cement by weight.

    b. Pigments shall not exceed 5 percent of masonry cement or mortar cement by

    weight.

    C. Grout Mix: ASTM C 476, slump of 8 to 11 inches measured per ASTM C 143.

    1. Provide fine or coarse grout per ACI 530/ASCE 5/TMS 402, Table 1.15.1, Grout Space

    Requirements, based upon height and grout space.

    2. ASTM C 476 grout mix shall be determined by the following method:

    a. Table 1 Grout Proportions By Volume.

    <Select either above or below>

    b. Specified compressive strength tested in accordance with ASTM C 1019,

    minimum compressive strength of 2,000 pounds per square inch.

    3. Approved grout admixtures.

    D. Self-Consolidating Grout Mix: Conforms to material requirements of ASTM C 476.

    1. Provide fine or coarse self-consolidating grout.

    2. Attains the specified compressive strength or 2,000 pounds per square inch, whichever is

    greater, at 28 days when tested in accordance with ASTM C1019.

    3. Has a slump flow of 24 to 30 inches per ASTM C 1611.

    4. Has a Visual Stability Index (VSI) less than or equal to 1 per ASTM C 1611, Appendix

    X.1.

    5. Job-Site proportioning of self-consolidating grout is NOT PERMITTED.

    6. Field addition of water and admixtures NOT PERMITTED.

     Page 9 of 14 Concrete Masonry Assemblies (Single Wythe CMU)

    April 2010 Section 04 22 00.01

    The decision to utilize this information is not within the purview of the MIM, and persons making use of this information do so at their own risk. MIM makes no representation or warranties, expressed or implied, with respect to the accuracy or suitability of this information. MIM and its members disclaim liability for damages of any kind, including any special, indirect, incidental, or consequential damages, which may result from the use of this information. This information is not to be interpreted as indicating compliance with, or waiver of, any provision of any applicable building code, ordinance, standard or law.

PART 3 EXECUTION

    3.1 INSPECTION

    A. Inspect concrete foundations for compliance with tolerances of ACI 117, and verify reinforcing

    dowels are positioned in accordance with the Drawings.

    B. Foundation and/or Load-Bearing Masonry Wall Discrepancies: <Edit for GC or CM>

    1. Notify the Architect/Engineer, [the General Contractor], [the Construction Manager]

    in writing of discrepancies.

    2. Do not proceed with masonry work until conditions have been corrected. 3.2 PREPARATION

    A. Contractor shall prepare the foundation surface for adequate masonry bond.

    B. Do not wet CMUs before placing.

    C. Place steel reinforcement free of mud and other debris in grout spaces prior to grouting.

    D. Provide cleanouts in CMU walls to be grouted when height of constructed wall exceeds 5 feet in

    height.

    E. Protect non-masonry adjacent surfaces during construction until cleaned.

    3.3 FIELD QUALITY CONTROL

    A. Testing for Grout: When the grout compressive strength is specified, test in accordance with

    ASTM C 1019.

    B. Testing for Self-Consolidating Grout:

    1. Grout compressive strength, test in accordance with ASTM C1019

    2. As delivered to site, verification of slump flow and Visual Stability Index (VSI) per

    ASTM C 1611.

    C. All Field Technicians sampling, making, and curing specimens for acceptance testing shall be

    certified by the National Concrete Masonry Association, Grade 1 certification, or equivalent.

    D. Testing for Mortar: Mortar aggregate ratio per ASTM C 780.

    3.4 PLACEMENT GENERAL

    A. Place CMUs in running bond pattern unless indicated otherwise.

    B. Construct 3/8 inch (plus or minus 1/8 inch) mortar bed joints when CMU is compressed onto

    mortar.

    C. Construct 3/8 inch (minus 1/4, plus 3/8 inch) mortar head joints when CMU is shoved into mortar.

    D. Construct full mortar bed joint on foundation. Joints shall not be less than 1/4 inch and not more

    than 3/4 inch when CMU is compressed onto mortar.

    E. Tool mortar joints to a concave profile when mortar is thumbprint hard.

     Page 10 of 14 Concrete Masonry Assemblies (Single Wythe CMU)

    April 2010 Section 04 22 00.01

    The decision to utilize this information is not within the purview of the MIM, and persons making use of this information do so at their own risk. MIM makes no representation or warranties, expressed or implied, with respect to the accuracy or suitability of this information. MIM and its members disclaim liability for damages of any kind, including any special, indirect, incidental, or consequential damages, which may result from the use of this information. This information is not to be interpreted as indicating compliance with, or waiver of, any provision of any applicable building code, ordinance, standard or law.

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