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<br />0[124':3 <br /> <br />DuranRO PumoinR Plant - StaRe 1 <br /> <br />I, ASTMC33. <br /> <br />2, Moisture content of sands delivered to the batching plant: uniform and stable <br />moisture content ofless than 6 percent free moisture. Do not exceed 1/2 percent <br />in 30 minutes variation of moisture in sand as batched. <br /> <br />3, Production of Sand <br /> <br />a. Use natural sand or natural sand combined with manufactured sand, <br /> <br />b, If manufactured sand is used, produce manufactured sand with a suitable <br />ball or rod mill, or disk, or cone crusher so that the particles are <br />predominantly cubical in shape and free from flat or elongated particles, <br /> <br />c. Do not use manufactured sand obtained from jaw crushers, <br /> <br />d, Blend natural sand uniformly with manufactured sand by routing through <br />a sand classifier, <br /> <br />! <br />, <br /> <br />4. Quality, as batched <br />a, Clean, hard, dense, durable, uncoated rock fragments. <br />b, Sodium sulfate test for soundness <br />1) Determine in accordance with ASTM C 88, Sodium Sulfate <br />Solution, <br />2) Ten percent maximum weighted average loss, by weight, after five <br />cycles. <br />Specific gravity <br />I) Determine in accordance with ASTM C 128, saturated, surface-dry <br />basis. <br /> <br />c. <br /> <br />2) Minimum: 2.60. <br /> <br />d, Deleterious substances: Conforming to ASTM C 33, section 7. <br /> <br />5. Grading <br /> <br />a. In accordance with ASTM C 33, Section 6. <br /> <br />b. Fineness moduli: <br /> <br />1) Determine in accordance with ASTM C 136, <br /> <br />2) At least 9 out of any 10 consecutive test samples of finished sand <br />shall not vary more than 0,20 from the average fineness modulus <br />of the ten test samples, <br /> <br />6, Sand Source <br /> <br />a, If sand source has not been previously tested and approved by the <br />Government, provide data from independent testing laboratory for sand <br />conforming to ASTM C 33, <br /> <br />b, Provide results of petrographic examination according to ASTM C 295. <br /> <br />Cast-in-Place Concrete <br />03300 - 9 <br />