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<br />Copyright 2004 AIA <br /> <br />MASTERSPEC Short Form <br /> <br />05/04 (R 05/06) <br /> <br />1. Galvanizing Repair Paint: High-zinc-dust-content paint with dry film containing not less <br />than 94 percent zinc dust by weight, and complying with DOD-P-21035A or SSPC- <br />Paint 20. <br /> <br />M. Shop-Primed Finish: Prepare surfaces of nongalvanized steel items, except those surfaces to be <br />embedded in concrete, according to requirements in SSPC-SP 3 and shop-apply [lead- and <br />chromate-free, rust-inhihitive primer, complying with performance requirements in <br />MPI 79] [SSPC-Paint 25] according to SSPC-P A 1. <br /> <br />2.4 GROUT MATERIALS <br /> <br />A. Sand-Cement Grout: Portland cement, ASTM C 150, Type I, and clean, natural sand, <br />ASTM C 144 or ASTM C 404. Mix at ratio of 1 part cement to 2-1/2 parts sand, by volume, <br />with minimum water required for placement and hydration. <br /> <br />B. Nonmetallic, Nonshrink Grout: Premixed, nonmetallic, noncorrosive, nonstaining grout <br />containing selected silica sands, portland cement, shrinkage-compensating agents, plasticizing <br />and water-reducing agents, complying with ASTM C 1107, Grade A for drypack and Grades B <br />and C for flowable grout and of consistency suitable for application within a 30-minute working <br />time. <br /> <br />C. Epoxy-Resin Grout: Two-component, mineral-filled epoxy resin; ASTM C 881/C 881M, of <br />type, grade, and class to suit requirements. <br /> <br />2.5 CONCRETE MIXTURES <br /> <br />A. Prepare design mixtures for each type of precast concrete required. <br /> <br />1. Limit use of fly ash and silica fume to 20 percent of portland cement by weight; limit <br />metakaolin and silica fume to 10 percent of portland cement by weight. <br /> <br />B. Design mixtures may be prepared by a qualified independent testing agency or by qualified <br />precast plant personnel at architectural precast concrete fabricator's option. <br /> <br />C. Limit water-soluble chloride ions to maximum percentage by weight of cement permitted by <br />ACI 318 (ACI 318M) or PCI MNL 117 when tested according to ASTM C 1218/C 1218M. <br /> <br />D. Normal-Weight Concrete Mixtures: Proportion mixtures by either laboratory trial batch or field <br />test data methods according to ACI 211.1, with materials to be used on Project, to provide <br />normal-weight concrete with the following properties: <br /> <br />1. Compressive Strength (28 Days): 5000 psi (34.5 MPa) minimum. <br /> <br />E. Water Absorption: 6 percent by weight or 14 percent by volume, tested according to <br />PCIMNL 117. <br /> <br />F. Add air-entraining admixture at manufacturer's prescribed rate to result in concrete at point of <br />placement having an air content complying with PCI MNL 117. <br /> <br />ARCHITECTURAL PRECAST CONCRETE <br /> <br />03450 - 5 <br />