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MINIM[JM COMPRESSIVE HYDRATED LIMES DAMP ' <br /> MORTAR STRENGTH AT 28 DAYS PORTI,AND OR LIME PUTTY MASONRY LOOSE <br /> TYPE (p, s, i, ) CEMENT MIN. MAX, CEMENTS AGGREGATE � <br /> 1 - 1/4 - Not less than <br /> M 2500 1 - - 1 2-1/4 and not . <br /> 1 1/4 1/2 - more than 3 <br /> S 1800 1/2 - - 1 times the sum <br /> 1 1/2 1-1/4 - of the volumes <br /> N 750 - - - 1 of the cement <br /> � 350 1 1-1/4 2-1/2 _ and lime used <br /> When plastic or waterproof cement is used as specified in Section 2403 (p) . hydrated lime <br /> or putty may be added but not in excess of one-tenth the volume of cement. <br />