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HomeMy WebLinkAbout11035 042000 sf - unit masonry.pdfDUNKIN’ DONUTS REBUILD CARMEL, INDIANA © McComas Engineering, Inc. UNIT MASONRY 042000 - 1 SECTION 042000 - UNIT MASONRY PART 1 - GENERAL 1.1 SUMMARY A. Section Includes: 1. Concrete masonry units (CMU's). 1.2 SUBMITTALS A. Product Data: For each type of product indicated. B. Shop Drawings: For reinforcing steel. Detail bending and placement of unit masonry reinforcing bars. Comply with ACI 315, "Details and Detailing of Concrete Reinforcement." C. Material Certificates: For each type and size of product indicated. For masonry units include data on material properties. D. Mix Designs: For each type of mortar and grout. Include description of type and proportions of ingredients. 1. Include test reports for mortar mixes required to comply with property specification. Test according to ASTM C 109/C 109M for compressive strength, ASTM C 1506 for water retention, and ASTM C 91 for air content. 2. Include test reports, according to ASTM C 1019, for grout mixes required to comply with compressive strength requirement. 1.3 QUALITY ASSURANCE A. Masonry Standard: Comply with ACI 530.1/ASCE 6/TMS 602 unless modified by requirements in the Contract Documents. 1.4 PROJECT CONDITIONS A. Cold-Weather Requirements: Do not use frozen materials or materials mixed or coated with ice or frost. Do not build on frozen substrates. Remove and replace unit masonry damaged by frost or by freezing conditions. Comply with cold-weather construction requirements contained in ACI 530.1/ASCE 6/TMS 602. B. Hot-Weather Requirements: Comply with hot-weather construction requirements contained in ACI 530.1/ASCE 6/TMS 602. DUNKIN’ DONUTS REBUILD CARMEL, INDIANA © McComas Engineering, Inc. UNIT MASONRY 042000 - 2 PART 2 - PRODUCTS 2.1 MASONRY UNITS, GENERAL A. Defective Units: Referenced masonry unit standards may allow a certain percentage of units to contain chips, cracks, or other defects exceeding limits stated in the standard. Do not use units where such defects will be exposed in the completed Work. B. Fire-Resistance Ratings: Where indicated, provide units that comply with requirements for fire- resistance ratings indicated as determined by testing according to ASTME119, by equivalent masonry thickness, or by other means, as acceptable to authorities having jurisdiction. 2.2 CONCRETE MASONRY UNITS A. Shapes: Provide shapes indicated and for lintels, corners, jambs, sashes, movement joints, headers, bonding, and other special conditions. B. CMUs: ASTM C 90. 1. Unit Compressive Strength: Provide units with minimum average net-area compressive strength of 2800 psi (19.3 MPa). 2. Density Classification: Normal weight. 2.3 MORTAR AND GROUT MATERIALS A. Portland Cement: ASTMC150, TypeI or II, except TypeIII may be used for cold-weather construction. Provide natural color or white cement as required to produce mortar color indicated. B. Hydrated Lime: ASTM C 207, Type S. C. Portland Cement-Lime Mix: Packaged blend of portland cement and hydrated lime containing no other ingredients. D. Aggregate for Mortar: ASTM C 144. 1. For joints less than 1/4 inch (6 mm) thick, use aggregate graded with 100 percent passing the No. 16 (1.18-mm) sieve. 2. White-Mortar Aggregates: Natural white sand or crushed white stone. 3. Colored-Mortar Aggregates: Natural sand or crushed stone of color necessary to produce required mortar color. E. Aggregate for Grout: ASTM C 404. F. Cold-Weather Admixture: Nonchloride, noncorrosive, accelerating admixture complying with ASTM C 494/C 494M, Type C, and recommended by manufacturer for use in masonry mortar of composition indicated. DUNKIN’ DONUTS REBUILD CARMEL, INDIANA © McComas Engineering, Inc. UNIT MASONRY 042000 - 3 1. Products: Subject to compliance with requirements, available products that may be incorporated into the Work include, but are not limited to, the following: a. Euclid Chemical Company (The); Accelguard 80. b. Grace Construction Products, W. R. Grace & Co. - Conn.; Morset. c. Sonneborn Products, BASF Aktiengesellschaft; Trimix-NCA. G. Water: Potable. 2.4 REINFORCEMENT A. Uncoated Steel Reinforcing Bars: ASTMA615/A 615M or ASTMA996/A 996M, Grade60 (Grade 420). B. Masonry Joint Reinforcement, General: ASTM A 951/A 951M. 1. Exterior Walls: Hot-dip galvanized, carbon steel. 2. Wire Size for Side Rods: 0.148-inch (3.77-mm) diameter. 3. Wire Size for Cross Rods: 0.148-inch (3.77-mm) diameter. 4. Spacing of Cross Rods, Tabs, and Cross Ties: Not more than 16 inches (407 mm) o.c. 5. Provide in lengths of not less than 10 feet (3 m), with prefabricated corner and tee units. C. Masonry Joint Reinforcement for Single-Wythe Masonry: Either ladder or truss type with single pair of side rods. 2.5 MORTAR AND GROUT MIXES A. General: Do not use admixtures, including pigments, air-entraining agents, accelerators, retarders, water-repellent agents, antifreeze compounds, or other admixtures, unless otherwise indicated. 1. Do not use calcium chloride in mortar or grout. 2. Use portland cement-lime or masonry cement mortar unless otherwise indicated. 3. Add cold-weather admixture (if used) at same rate for all mortar that will be exposed to view, regardless of weather conditions, to ensure that mortar color is consistent. B. Preblended, Dry Mortar Mix: Furnish dry mortar ingredients in form of a preblended mix. Measure quantities by weight to ensure accurate proportions, and thoroughly blend ingredients before delivering to Project site. C. Mortar for Unit Masonry: Comply with ASTM C 270, Property Specification. Provide the following types of mortar for applications stated unless another type is indicated. 1. For all masonry, use Type S. D. Grout for Unit Masonry: Comply with ASTM C 476. DUNKIN’ DONUTS REBUILD CARMEL, INDIANA © McComas Engineering, Inc. UNIT MASONRY 042000 - 4 1. Use grout of type indicated or, if not otherwise indicated, of type (fine or coarse) that will comply with Table 1.15.1 in ACI 530.1/ASCE 6/TMS 602 for dimensions of grout spaces and pour height. 2. Proportion grout in accordance with ASTMC 476, paragraph 4.2.2 for specified 28-day compressive strength indicated, but not less than 2000 psi (14 MPa). 3. Provide grout with a slump of 8 to 11 inches (203 to 279 mm) as measured according to ASTM C 143/C 143M. PART 3 - EXECUTION 3.1 INSTALLATION, GENERAL A. Use full-size units without cutting if possible. If cutting is required to provide a continuous pattern or to fit adjoining construction, cut units with motor-driven saws; provide clean, sharp, unchipped edges. Allow units to dry before laying unless wetting of units is specified. Install cut units with cut surfaces and, where possible, cut edges concealed. B. Select and arrange units for exposed unit masonry to produce a uniform blend of colors and textures. 3.2 TOLERANCES A. Dimensions and Locations of Elements: 1. For dimensions in cross section or elevation do not vary by more than plus 1/2 inch (12 mm) or minus 1/4 inch (6 mm). 2. For location of elements in plan do not vary from that indicated by more than plus or minus 1/2 inch (12 mm). 3. For location of elements in elevation do not vary from that indicated by more than plus or minus 1/4 inch (6 mm) in a story height or 1/2 inch (12 mm) total. B. Lines and Levels: 1. For bed joints and top surfaces of bearing walls do not vary from level by more than 1/4 inch in 10 feet (6 mm in 3 m), or 1/2 inch (12 mm) maximum. 2. For conspicuous horizontal lines, such as lintels, sills, parapets, and reveals, do not vary from level by more than 1/8 inch in 10 feet (3 mm in 3 m), 1/4 inch in 20 feet (6 mm in 6 m), or 1/2 inch (12 mm) maximum. 3. For vertical lines and surfaces do not vary from plumb by more than 1/4 inch in 10 feet (6 mm in 3 m), 3/8 inch in 20 feet (9 mm in 6 m), or 1/2 inch (12 mm) maximum. 4. For conspicuous vertical lines, such as external corners, door jambs, reveals, and expansion and control joints, do not vary from plumb by more than 1/8 inch in 10 feet (3 mm in 3 m), 1/4 inch in 20 feet (6 mm in 6 m), or 1/2 inch (12 mm) maximum. 5. For lines and surfaces do not vary from straight by more than 1/4 inch in 10 feet (6 mm in 3 m), 3/8 inch in 20 feet (9 mm in 6 m), or 1/2 inch (12 mm) maximum. C. Joints: DUNKIN’ DONUTS REBUILD CARMEL, INDIANA © McComas Engineering, Inc. UNIT MASONRY 042000 - 5 1. For bed joints, do not vary from thickness indicated by more than plus or minus 1/8 inch (3 mm), with a maximum thickness limited to 1/2 inch (12 mm). 2. For head and collar joints, do not vary from thickness indicated by more than plus 3/8 inch (9 mm) or minus 1/4 inch (6 mm). 3. For exposed head joints, do not vary from thickness indicated by more than plus or minus 1/8 inch (3 mm). 3.3 LAYING MASONRY WALLS A. Lay out walls in advance for accurate spacing of surface bond patterns with uniform joint thicknesses and for accurate location of openings, movement-type joints, returns, and offsets. Avoid using less-than-half-size units, particularly at corners, jambs, and, where possible, at other locations. B. Bond Pattern for Exposed Masonry: Unless otherwise indicated, lay exposed masonry in running bond; do not use units with less than nominal 4-inch (100-mm) horizontal face dimensions at corners or jambs. C. Built-in Work: As construction progresses, build in items specified in this and other Sections. Fill in solidly with masonry around built-in items. D. Fill space between steel frames and masonry solidly with mortar unless otherwise indicated. E. Fill all cores in hollow CMUs with grout. 3.4 MORTAR BEDDING AND JOINTING A. Lay hollow CMUs as follows: 1. With face shells fully bedded in mortar and with head joints of depth equal to bed joints. 2. With webs fully bedded in mortar in grouted masonry, including starting course on footings. 3. With entire units, including areas under cells, fully bedded in mortar at starting course on footings where cells are not grouted. B. Lay solid masonry units with completely filled bed and head joints; butter ends with sufficient mortar to fill head joints and shove into place. Do not deeply furrow bed joints or slush head joints. C. Tool exposed joints slightly concave when thumbprint hard, using a jointer larger than joint thickness unless otherwise indicated. D. Cut joints flush for masonry walls to receive plaster or other direct-applied finishes (other than paint) unless otherwise indicated. DUNKIN’ DONUTS REBUILD CARMEL, INDIANA © McComas Engineering, Inc. UNIT MASONRY 042000 - 6 3.5 MASONRY JOINT REINFORCEMENT A. General: Install entire length of longitudinal side rods in mortar with a minimum cover of 5/8 inch (16 mm) on exterior side of walls, 1/2 inch (13 mm) elsewhere. Lap reinforcement a minimum of 6 inches (150 mm). 1. Space reinforcement not more than 8 inches (203 mm) o.c. in foundation . B. Provide continuity at wall intersections by using prefabricated T-shaped units. C. Provide continuity at corners by using prefabricated L-shaped units. 3.6 REINFORCED UNIT MASONRY INSTALLATION A. Placing Reinforcement: Comply with requirements in ACI 530.1/ASCE 6/TMS 602. B. Grouting: Do not place grout until entire height of masonry to be grouted has attained enough strength to resist grout pressure. 1. Comply with requirements in ACI530.1/ASCE 6/TMS 602 for cleanouts and for grout placement, including minimum grout space and maximum pour height. 3.7 FIELD QUALITY CONTROL A. Testing and Inspecting: Owner will engage special inspectors to perform tests and inspections and prepare reports. Allow inspectors access to scaffolding and work areas, as needed to perform tests and inspections. Retesting of materials that fail to comply with specified requirements shall be done at Contractor's expense. 3.8 REPAIRING, POINTING, AND CLEANING A. In-Progress Cleaning: Clean unit masonry as work progresses by dry brushing to remove mortar fins and smears before tooling joints. 3.9 MASONRY WASTE DISPOSAL A. Excess Masonry Waste: Remove excess clean masonry waste that cannot be used as fill, as described above, and other masonry waste, and legally dispose of off Owner's property. END OF SECTION 042000