CONCRETE MASONRY UNITS
PART 1 GENERAL
1.1 SECTION INCLUDES
A. Concrete masonry units.
B. Reinforcement, anchorage, and accessories.
1.2 RELATED SECTIONS
A. Section 04065 - Mortar and Masonry Grout.
B. Section 04095 - Masonry Weeps and Vents: Weeps for concrete masonry walls.
C. Section 07620 - Sheet Metal Flashing and Trim.
D. Section 07900 - Joint Sealers.
A. ASTM A 82 - Standard Specification for Steel Wire, Plain, for Concrete Reinforcement; latest version
B. ASTM A 153/A 153M - Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware; 1995.
C. ASTM A 615/A 615M -Standard Specification for Deformed and Plain Billet-Steel Bars for Concrete Reinforcement; latest version.
D. ASTM C 55 - Standard Specification for Concrete Brick; 2002.
E. ASTM C 90 - Standard Specification for Loadbearing Concrete Masonry Units; latest version.
F. ASTM D 226 - Standard Specification for Asphalt-Saturated Organic Felt Used in Roofing and Waterproofing; latest version.
G. ASTM C 33 – Standard Specifications for Concrete Aggregates latest version
H. ASTM C 331 – Standard Specification for Lightweight aggregates for concrete masonry units latest version
I. IMIAWC (CW) - Recommended Practices & Guide Specifications for Cold Weather Masonry Construction; International Masonry Industry All-Weather Council; latest version.
J. IMIAWC (HW) - Recommended Practices & Guide Specifications for Hot Weather Masonry Construction; International Masonry Industry All-Weather Council; current edition.
A. Submit under provisions of Section 01300.
B. Product Data: Provide data for decorative masonry units and fabricated wire reinforcement.
C. Samples: Submit four samples of decorative block units to illustrate color, texture and extremes of color range.
1.5 QUALITY ASSURANCE
A. Water Repellency: Where integral water repellent is required, provide concrete masonry units manufactured so that a water drop placed on an upward-facing, broken concrete textured surface will not be absorbed by the concrete surface for a period of at least four hours; the presence of a salt spot at the location of the water drop after evaporation will provide evidence that the water evaporated and was not absorbed by the concrete masonry unit.
A. Construct a masonry wall as a mock-up panel sized 4 feet (1.2 m) long by 4 feet (1.2 m) high, which includes mortar and accessories.
B. Construct mock-up with a southern exposure in location directed by Architect.
C. Maintain mock-up throughout the masonry portion of the work.
D. Remove mock-up when masonry work has been approved by Architect and remove debris from project site.
1.7 DELIVERY, STORAGE, AND HANDLING
A. Deliver, handle, and store concrete masonry units by means that will prevent mechanical damage and contamination by other materials.
1.8 ENVIRONMENTAL REQUIREMENTS
A. Cold Weather Requirements: Comply with recommendations of IMIAWC (CW).
B. Hot Weather Requirements: Comply with recommendations of IMIAWC (HW).
PART 2 PRODUCTS
A. Provide concrete masonry units as manufactured by Smithtown Concrete Products Corporation, 441 Middle Country Road PO Box 612, Smithtown, New York 11787. ASD. Tel: (631) 265-1815. Fax: (631) 265-1977.
B. Requests for substitutions will be considered in accordance with provisions of Section 01600.
C. Substitutions: Not permitted.
2.2 CONCRETE MASONRY UNITS
2. Size: Standard units with nominal face dimensions of 8 x 16 inches (200 x 400 mm) and nominal depths as indicated on the drawings for specific locations.
3. Size: Units with nominal face size of 4 x 16 in (100 x 400 mm) and nominal depth of 4 in (100 mm).
4. Pattern: Smithstone (simulated stone).
b. Center scored.
c. Twin scored.
d. Triple scored.
5. Pattern: Smooth-Cast.
b. Center scored.
c. Twin scored.
d. Triple scored.
6. Pattern: Split-Face.
b. Center scored.
7. Pattern: Split-Rib.
8. Pattern: 4-Rib Split-Rib.
9. Pattern: Waffle Block.
10. Special Shapes: As indicated on the drawings for special conditions.
11. Insulation: Include Korfil Block Insulation in all concrete masonry units forming the exterior envelope.
12. Coloring: Color concrete masonry block units with integrally mixed, lightfast, weather-resistant pigment, maintaining uniform color throughout project.
13. Color: As selected by Architect from manufacturer's Earthtone color range.
14. Color: As selected by Architect from manufacturer's Pastel color range.
15. Color: As selected by Architect from manufacturer's Arctic Frost color range.
16. Color: ________.
B. Concrete Brick: ASTM C 55; manufactured with integral water repellent.
1. Size: Units with nominal face size of 4 x 16 in (100 x 400 mm) and nominal depth of 4 in (100 mm).
2. Size: Units with nominal face size of 2-1/4 x 16 in (54 x 400 mm) and nominal depth of 4 in (100 mm).
3. Coloring: Color concrete brick units with integrally mixed, lightfast, weather-resistant pigment, maintaining uniform color throughout project.
4. Color: As selected by Architect from manufacturer's Earthtone color range.
5. Color: As selected by Architect from manufacturer's Pastel color range.
6. Color: As selected by Architect from manufacturer's Arctic Frost color range.
7. Color: ________.
C. Lightweight Concrete Hollow Load-bearing Concrete Masonry Units: ASTM C-90 latest version,
Concrete Masonry Units To Be Supplied To This Project Shall Be Manufactured By A Plant Certified By The New York State Concrete Masonry Association’s FM2000 Assurance of Quality Program.
As part of the normal project submittal process the FM2000 Producers will:
· Submit a certificate from The New York State Concrete Masonry Association that the
producer is a current participant In the FM2000 Program. Block will be in compliance with the New York State Concrete Masonry Association’s Random Sampling and Test Provisions of the FM2000 Assurance of Quality Program.
Submit ASTM C140 Tests from the National Concrete Masonry Association demonstrating compliance To ASTM C 90 “Standard Specification for Load Bearing Concrete Masonry Units”, except that the net area unit compressive strength will be 2800 PSI at 28 days.
· With A Minimum 28 Day Net Area Compressive Strength of 2800 Psi
· Submit A Cover Letter From The
National Concrete Masonry Association Which Identifies
The Compressive Strength Of Masonry (ƒ’m ) For The Block Tested- Based On Section
1.4.B.2.b Of “Specifications For Masonry Structures”(Referenced By The “Building Code
Of New York State”) ƒ’m Values Will Be Identified For Block Used With Type M Or S
Mortar And Type N Mortar.
· Submit National Concrete
Masonry Association Tests For ASTM C1314 –Standard Test
Method For Compressive Strength Of Masonry Prisms Showing The 28 Day Prism Test
Values Of The 2800 Net Area Compressive Strength Units.
· Submit National Concrete Masonry Association Tests For ASTM C426 –
Method For Linear Drying Shrinkage Of Concrete Masonry Units. Demonstrating
Compliance to ASTM C 90 “Standard Specification For Load Bearing Concrete Masonry
· Submit A Certificate Of
Compliance From The FM2000 Producer That All Block Supplied
To This Project Will Be From The Same “Lot” As The Block Used In The Tests Submitted.
ASTM Defines “Lot” “As Any Number Of Concrete Masonry Units Of Any Configuration
Or Dimension Manufactured By The Producer Using The Same Materials, Concrete Mix
Design, Manufacturing Process, And Curing Method.”
· All cubes of block delivered to this project will be marked with the New York State Concrete
Masonry Association FM2000 Assurance of Quality label.
1. These block shall be ~105 lbs/cuft density
2. These units shall contain lightweight aggregate conforming to ASTM-331 and normal weight aggregate conforming to ASTM-33.
2.3 MORTAR AND GROUT MATERIALS
A. Mortar: As specified in Section 04065.
B. Grout: As specified in Section 04065.
2.4 REINFORCEMENT AND ANCHORAGE
A. Reinforcing Steel: ASTM A 615/A 615M Grade 40 (300) deformed billet bars; galvanized.
B. Single Wythe Joint Reinforcement (preferred laddur): Truss type; ASTM A 82 steel wire, hot dip galvanized after fabrication to ASTM A 153/A 153M, Class B; 0.1483 inch (3.8 mm) side rods with 0.1483 inch (3.8 mm) cross rods; width as required to provide not more than 1 inch (25 mm) and not less than 1/2 inch (13 mm) of mortar coverage on each exposure.
C. Cavity Wall Joint Reinforcement: ___________ style; ASTM A 82 steel wire, hot dip galvanized after fabrication to ASTM A 153/A 153M, Class B; 0.1483 inch (3.8 mm) side rods with 0.1483 inch (3.8 mm) cross rods.
A. Copper, as specified in Section 07620.
B. Lead coated copper, as specified in Section 07620.
C. Galvanized steel, as specified in Section 07620.
D. Stainless steel, as specified in Section 07620.
E. ___________________, as specified in Section 07620.
F. Lap Sealant: Butyl type as specified in Section 07900.
A. Preformed Control Joints: Rubber, neoprene, or polyvinyl chloride material; provide with corner and tee accessories, fused joints.
B. Building Paper: ASTM D 226, Type I ("No. 15") asphalt felt.
PART 3 EXECUTION
A. Verify that field conditions are acceptable and are ready to receive concrete unit masonry.
B. Verify that related items provided under other sections are properly sized and located.
C. Verify that built-in items are in proper location, and ready for roughing into masonry work.
A. Establish lines, levels, and coursing indicated. Protect from displacement.
B. Maintain masonry courses to uniform dimension. Form vertical and horizontal joints of uniform thickness.
C. Concrete Masonry Units:
1. Bond: Running bond.
2. Bond: Stack bond.
3. Coursing: One unit plus one horizontal joint equals 8 inches (203 mm).
4. Coursing: One unit plus one horizontal joint equals 4 inches (102 mm).
5. Mortar Joints: Concave.
6. Mortar Joints: Struck.
7. Mortar Joints: __________.
3.3 LAYING MASONRY UNITS
A. Lay solid masonry units in full bed of mortar, with full head joints, uniformly jointed with other work.
B. Lay hollow masonry units with face shell bedding on head and bed joints.
C. Remove excess mortar as work progresses.
D. Interlock intersections and external corners, except for units laid in stack bond.
E. Do not shift or tap masonry units after mortar has achieved initial set. Where adjustment must be made, remove mortar and replace.
F. Perform cutting of masonry units with proper tools to provide straight, clean, unchipped edges. Prevent broken masonry unit corners or edges.
3.4 REINFORCEMENT AND ANCHORAGE
A. Install horizontal joint reinforcement 8 inches (200 mm) on center.
B. Place masonry joint reinforcement in first and second horizontal joints above and below openings. Extend reinforcement a minimum of 16 inches (400 mm) beyond each side of opening.
C. Place continuous joint reinforcement in first and second joint below top of walls.
D. Place reinforcing bars as indicated on drawings. Support and secure bars from displacement; maintain within 1/2 in (13 mm) of dimensioned position.
A. Whether or not specifically indicated, install masonry flashing to divert water to exterior at all locations where downward flow of water will be interrupted.
1. Extend flashings full width at such interruptions and at least 4 inches (100 mm) into adjacent masonry or turn up at least 4 inches (100 mm) to form watertight pan at non-masonry construction.
2. Remove or cover protrusions or sharp edges that could puncture flashings.
3. Seal lapped ends and penetrations of flashing before covering with mortar.
B. Extend metal flashings through exterior face of masonry and turn down to form drip.
C. Lap end joints of flashings at least 4 inches (100 mm) and seal watertight with mastic or elastic sealant.
3.6 ADJUSTING AND CLEANING
A. Remove excess mortar and mortar smears as work progresses; replace defective mortar with mortar matching adjacent work.
B. Clean soiled surfaces with cleaning solution, using non-metallic tools.
END OF SECTION