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� � . <br /> � Page 7 <br /> STRUCTURAL SPECIFICATION <br /> $WEATT RESIDENCE <br /> WAYZATA MN <br /> ARCHISTRUCTURES #9512-3 <br /> B. Hydrated Lime: ASTM C207-91(1992)Type <br /> S. B. Re-laying mortar: Where masonry units are <br /> disturbed after the mortar has set, remove and <br /> C. Masonry Cement: ASTM C91-91. re-lay the units with fresh mortar. <br /> D. Sand: ASTM C144-91. 3.03 WEATHER PROTECTION <br /> E. Water:Clean,potable and free of materials that A. During placement: Lay no masonry when <br /> are hartnful to steel or concrete. outside air temperature is below 40' F. or <br /> expected to fall below 40' F., unless sand and <br /> 2.02 MORTAR mixing water are heated to provide a mortar <br /> temperature of 70' F. and the completed work <br /> A. Proportions: Mortar shall conform to the is protected from freezing. Maintain an air <br /> Proportion Specif:cations of ASTM C270-90a. temperature above 40' F. on both sides of the <br /> masonry for at lease 24 hours aRer placement. <br /> B. Mortar type&minimum strength: <br /> B. During curing: Changes in temperature of the <br /> 1. Reinforced masonry: Type "M" mortar. masonry shall be as uniform as possible and <br /> Minimum compressive strength @ 28 days shall not exceed 5' F. in one hour or 50' F. in <br /> shall be f m=2800 psi. a 24 hour period. <br /> 2.03 MASONRY GROUT *** <br /> A. Proportions: Shall be in conformance with <br /> ASTM C476.Water content may be adjusted for SECTION <br /> proper workability and to enable proper <br /> placement under existing field conditions, but �42,2,� <br /> without segregation of materials. <br /> B. Minimum strength: Minimum compressive CONCRETE UNIT MASONRY <br /> strength @ 28 days shall be fg=2000 psi. <br /> C. Slump: Shall be between 8 and 11 inches as PART 1 :GENERAL <br /> determined by ASTM C143-90a. 1.01 SCOPE <br /> 2.04 ADMIXTURES A. Work Included: This section covers all <br /> A. Mortar and grout for this project shall contain materials and constructon related to concrete <br /> no other admixtures unless approved by the unit masonry as shown on the construction <br /> engineer and local building official. drawings. <br /> B. Related work: <br /> PART 3:CONSTRUCTION 1, Section 04100: MoRar&masonry grout. <br /> 3.01 PLACING MORTAR 2. Section 03200: Steel reinforcement. <br /> A. Joint width: Shall be 3/8 inches unless noted 1.02 QUALITY ASSURANCE <br /> otherwise in architectural specification.Lay first <br /> course of masonry block on footings with a full A. Standard: Work shall conform to the <br /> bed of mortar. Lay successive courses with American Concrete Institute ACI 530-88, <br /> divided bed joints. Tool exposed joints in Building Code Requirements for Masonry <br /> concrete block work to a concave surface until Structures. <br /> mortar is thumbprint hard. <br />