Laserfiche WebLink
iev Percent Passina <br /> 3/8" 100 <br /> No. 4 95-100 <br /> No. 8 80-100 <br /> No. 16 50-85 <br /> No. 30 25-60 <br /> No. 50 10-30 <br /> No. 100 2-10 <br /> 4.3.2 COARSE AGGREGATE <br /> Coarse aggregate for standard structural concrete shall consist of <br /> crushed stone, gravel, or other approved inert materials of similar <br /> characteristics, or combination thereof having hard, strong, <br /> durable pieces, free from adherent coatings. Deleterious sub- <br /> stances shall not exceed, in accumulations, five percent (5%) by <br /> weight. Gradation shall generally meet the requirements specified <br /> in ASTM C 33, Size Number 67. Gradation for ASTM C 33, Size <br /> 67: <br /> ieve Percent Passing <br /> 1" 100 <br /> 3/4" 90-100 <br /> 3/8" 20-55 <br /> No. 4 0-10 <br /> No. 8 0-5 <br /> 4.4 ADMIXTURES <br /> Air entraining admixtures shall meet the requirements of ASTM C 260. <br /> Other chemical admixtures shall comply with ASTM C 494. Recommended <br /> reference ASTM STP 169. Except as set forth in subparagraphs 2 and 3 <br /> below, admixtures shall be used only with prior written authorization of the <br /> Engineer. <br /> 4.4.1 QUANTITY <br /> Admixtures shall be used strictly in accordance with the manufac- <br /> turer's recommendations. All admixtures shall be added to the <br /> SPEC. B - CONCRETE <br /> PAGE 6 <br />