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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />!I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />06/07 <br /> <br />written approval of the Engineer. Air entraining cements may be used with written <br />approval of the Engineer. Cement brands shall be subject to approval. <br /> <br />C. <br /> <br />Aggregates: <br />1. Fine aggregate shall consist of washing inert sand conforming to the <br />requirements of ASTM Specification C-33, and the following detailed <br />requirements: <br /> <br />Sieve <br /> <br />% Passinq <br /> <br />NO.4 <br />16 <br />50 <br />100 <br /> <br />95-100% <br />60-75 <br />1 3-30 <br />3-8 <br /> <br />Fineness Modulus <br />Organics <br /> <br />2.4-2.6 <br />Organic Plate 2, per ASTM <br />C-40 <br />2.0% maximum <br />95% minimum as per ASTM <br />C87, Section 10 <br />8% maximum loss, using <br />magnesium sulfate, <br />subjected to 5 cycles <br /> <br />Silt <br />Mortar Strength <br /> <br />Soundness <br /> <br />2. Coarse aggregate shall consist of well-graded crushed rock or washing <br />gravel conforming to the requirements of ASTM Specification C-33 and the <br />following detailed requirements: <br /> <br />Organics <br /> <br />Organic Plate 1, per ASTM <br />C-40 <br />1.0% maximum <br />8% maximum loss, using <br />magnesium sulfate, <br />subjected to 5 cycles <br /> <br />Silt <br />Soundness <br /> <br />3. The following designated sizes* of aggregate shall be the maximum <br />employed in concrete: <br /> <br />2 inch for plain concrete <br />1 inch for reinforced sections 10 inch and over in thickness <br />3/4 inch for reinforced sections less than 10 inch in thickness <br /> <br />4. *Note: The "Designated Size" and the corresponding gradations shown <br />represent the end or combined gradation of the coarse aggregate to be <br />used in the final concrete. <br /> <br />D. <br /> <br />Water: <br />1. Water shall be clean and free from injurious amounts of oils, acid, alkali, <br />organic matter or other deleterious substances. <br />2. When subjected to the mortar strength test described in ASTM C87, the 28 <br />day strength of mortar specimens made with the water under examination <br />and normal portland cement shall be at least 100 per cent of the strength of <br />similar specimens made with distilled water. <br /> <br />03300-5 <br /> <br />03-4197 <br />