AASHTO-T-143-2004.pdf

standard method of test for sampling and testing calcium chloride for roads and structural applications aashto designation: t 143-04 astm designation: d 345-02 aashto t 143-04 is identical to astm d 345-02 except for the following provisions: 1. all references to astm standards c 136 and d 98 shall be replaced with aashto standards t 27 and m 144, respectively. 2. replace section 5 of astm d 345-02 with the following: 5. sampling 5. i solid-sample a shipment of the solid form calcium chloride for test purposes by selecting not less than three containers at random from the shipment. sample each of the containers by scraping aside the top layer to a depth of approximately 25 mm (1 in.) and taking 0.5-kg (1-lb) samples by means of a sampling thief or other method that will ensure a sample that is representative of a cross section of the material in the container to a depth of at least 152 mm (6 in.). take precautions during the sampling operation to avoid exposing the sample unduly to atmospheric moisture. immediately and thoroughly mix the individual samples to form a representative composite sample of material and store in a sealed glass or suitable plastic container. 5.2 liquid-sample a shipment of liquid form calcium chloride for testing purposes by selecting not less than three samples from each container of the shipment by means of an appropriate sampling device or other method that will ensure a sample that is representative of the contents of the container. take precautions during the sampling operation to avoid exposing the sample unduly to atmospheric moisture. immediately and thoroughly mix the individual samples to form a representative composite sample of material and store in a sealed glass or suitable plastic container. section x1.2.2 of astm d 345-02 is not included in aashto t 143-04. replace the first two sentences of section x1.5.1 of astm 345-02 with the following sentence: in a weighing bottle, weigh a sample of approximately 20 g to the nearest o. 1 g and dissolve in distilled water. 3. 4. ts-4c t 143-1 aashto copyright 2004 aashto. all rights reserved. duplication is a violation of applicable law. copyright american association of state highway and transportation officials provided by ihs under license with aashto licensee=university of texas revised sub account/5620001114 not for resale, 01/11/2009 02:27:01 mstno reproduction or networking permitted without license from ihs -,-,- designation: d 345 - 02 inlenatioku standard test method for sampling and testing calcium chloride for roads and structural appl ications nijs shn the number immediately following the designaticm indicates the year of original adoption or, m the case of revision, the year of last revision a number in parentheses indimies the year of ll reapproval. a nipersaipi epsilon (e) indicates an editorial change since the last revision or reapproval. wu srandani har been appmved for use by agencien o f the deprmnenr o f defnse. 1. scope 1.1 this test method covers sampling of solid and liquid forms of calcium chloride, and sieve analysis of solid form calcium chloride. referee procedures for chemical analysis are covered in test methods e 449. 1.2 a rapid method of chemical analysis i s shown in appendix x1. this rapid method is not to be used for determining chemical compliance of calcium chlotide with specification requirements, such as in specification d 98. 1.3 the values stated in si units are to be regarded as the standard. 1.4 this standard does not purport ta address the safeiy concerns, ifany, associated with its use. it is the responsibility of the user of this standard to establish appropriate safely and health practices und determine the applicabiliy o f regulatory limitations prior to use. 2. referenced documents 2.1 astm standars: c 136 test method for sieve analysis of fine and coarse d 98 specification for calcium chloride3 d 140 practice for sampling bituminous materials3 e 11 specification for wire cloth and sieves for testing e 449 test methods for analysis of calcium chloride aggregates purposes4 3. signicance and use 3.1 this test method describes procedures to be used for sampling calcium chloride, and for determining grading of solid forms of calcium chloride for comparison with the requirements of a specification, such as specification d 98. k teri method is under t h e jurisdiction of astm committee d4 on road and paving matenalr and is the direct mponsibility of subcommittee do4.31 on calcium and mum chjondes and o h r deicing marwials. crurent edition approved july 10, 2002. published july 2002. ongunlly published as d 345 .32 t . last prwjous edition d 345 - 97. a n d book oja.57xf smndnd, vol 04.02 a n d book o f astm smndn grading; sampling; sieve analysis ts-4 t 143-3 aashto copyright 2004 aashto. a11 rights reserved. duplication is a violation of applicable law. copyright american association of state highway and transportation officials provided by ihs under license with aashto licensee=university of texas revised sub account/5620001114 not for resale, 01/11/2009 02:27:01 mstno reproduction or networking permitted without license from ihs -,-,- d 345 appendix (nonmandatory information) x1. rapid method of analysis for calcium chloride x1.l scope x1.l.l this appendix covers a rapid method for chemical analysis of calcium chloride. x1.2 siguineance and use x1.2.1 the procedure for chemical analysis in this appendix determines total chlorides (cac12, mgci, nacl, k i , etc.) present in the sample and expresses that value as calcium chloride, x1.2.2 this rapid method only determines total chlorides, and does not guarantee that the chloride is present a s calcium chloride, therefore no material should be accepted or rejected under this method of analysis. however, when used in con- junction with test method e 449 on continuing shipments from a given source, the procedure may be used to determine changes in the composition of the material being furnished, especially with regard to moisture content. thus the frequency of testing by test method e 449 may be reduced. x13 apparatus flasks, and burets. x1.4 reagents xi .3.1 glasswae-standard weighing bottles, volumetric x1.3.2 balance, as described in 4.3. x1.4.1 nitric acid (“03, 1 + 1 by volume. xi .4.2 dichlompuorescein-0.1 % aqueous solution of the sodium sait of dichlorofluorescein. x1.4.3 silver nitrate solution4.l n agno,. xi .4.4 ammonium hydmxide (nh40h). xi5 procedure xi .5.1 weigh a 20.0 5 0.2-g sample in a weighing bottle. add distilled water to solid form calcium chloride to dissolve. add sufficient nitric acid (“0,) (1 + i) to clear, dilute to 1000 ml in a volumetric flask, and m i x thoroughly. titrate a 10-ml aliquot, containing five to seven drops of the dichlorof- luorescein solution as indicator, with 0.1 n silver nitrate (agno,) solution to a pink end point. u s e of other suitable indicators is permitted. xi 5 2 this procedure is not suitable for testing the material if more than a slight precipitate of magnesium hydroxide (mg(oh),) appears when a 10% filtered solution of the material is made alkaline with ammonium hydroxide (“,oh). x1.6 calculation caci, c, as follows: x1.6.1 calculate the total chlori