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1 SECTION 9-03, AGt3REGATES <br /> I 2 June 8, 1998 <br /> 3 9-03.1 Aggregates for Portland Cement Concrete <br /> 4 Sections 9-03.1(t) through 9-03.1(4)C are replaced with the following: <br /> � 5 <br /> � 6 9-03.1(1) General Requ(rements <br /> 7 Portland cement concrete aggregates shall bs manufactured from ledge rxk, <br /> 8 talus, or sand and gravel in acxordance with the provisions of Section 3-01. <br /> 9 <br /> 10 Aggregates fc>und to be potentially reactive per AASHTO T 303 or ASTM C 1260 <br /> I 11 shall require: mitigating measures. Expansions greater than 0.10 percent <br /> 12 detertnined ,.�ccording to AASHTO T 303 or ASTM C 1260 will be considered to <br /> 13 be potentialYy reactive. The Contracting Agency will conduct AASHTO T 303 in <br /> I 14 order to deYermine the potential reactivity of the aggregates, all other testinc� is <br /> 15 the responsibility of the Contractor. <br /> 16 <br /> � 17 Mitigating measures may include the use of iow alkafi cement per 9-01.2(3), fiy <br /> 18 ash, or otner material as approved by the Engineec The Contractor shall submit <br /> 19 eviderce in the form of test resul!s from ASTM C 1260 or AASHTO T 303 that <br /> � 20 demonstrate the mix proportions wil! control the potential expansion before the <br /> � 2 i aggregate source may be used in concreta. If fly ash fs used, the Contractor <br /> 22 shall provide test results ;ram ASTh4 C �l�li that show the fly dces not cause an <br /> , 23 Axpansion rear.tinn gr�zi�r than that��f the comparison control mixtur�� prepar:.d <br /> � � 24 with cement of all:a�i beh,veen J.40 s;:; 0.60 p�;.�nt. <br /> ' 2� <br /> � 26 Mitigating measurc:; shall not b�� r�quired i` ••s Ccntracto: ;�+ov�ues test results <br /> I � 27 f;o.�� �aSTtvl C 1293 that i�dica;� +he aggrey�.�c �� ���5 rcactive. An expansion o( <br /> � 28 less 1.han 0.04 percent per ASlivl C 1293 shall be considered evidence that the <br /> 29 aggregates are not reactive. <br /> I 30 <br /> 31 9-03.1(2) Fine AggregaYe for Portland Cement Concrete <br /> 32 Finr; an,gregate shall consist of sand or other inert materials, or combinations <br /> � 33 thereof, approved by the Engineer, having hard, strong, durabie particles free <br /> � 34 froin adherent coating. Fine aggregate shall be washed thoroughly to remove <br /> 35 d2ry, loam, alkali, organic matter, or other deleterious matter. <br /> I 36 <br /> 37 9•03.1(2)A Deleterious Substances <br /> 38 T'ne amount of deleterious substances in the washed aggregate shall not <br /> I 39 exceed the following values: <br /> 40 <br /> 41 1. Particles of specific gravity less than 1.95 ..... 1.0 percent by weight. <br /> I 42 <br /> 43 2. Organic matter, by colorimetric test, shall not be darker than the <br /> 44 reference standard color (orgar.ic plate No. 3) AASHTO T 21 uniess <br /> 1 45 other tests prove a darker color to be hartnless. <br /> 46 <br /> 47 3-03.1(2)B Grading <br /> I 48 Fine aggregate shall be greded to confortn to the following requirements <br /> 49 expressed as percentages by weight: <br /> IENGLISiH AMENDMENTS DIVISION 9 03.AP9 <br /> JUNE 8, 1999 Page 1 � <br /> � <br />