ASTM C1524-2002a(2010) Standard Test Method for Water-Extractable Chloride in Aggregate (Soxhlet Method)《填料中水提取氯化物标准试验方法(索式提取法)》.pdf
《ASTM C1524-2002a(2010) Standard Test Method for Water-Extractable Chloride in Aggregate (Soxhlet Method)《填料中水提取氯化物标准试验方法(索式提取法)》.pdf》由会员分享,可在线阅读,更多相关《ASTM C1524-2002a(2010) Standard Test Method for Water-Extractable Chloride in Aggregate (Soxhlet Method)《填料中水提取氯化物标准试验方法(索式提取法)》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C1524 02a (Reapproved 2010)Standard Test Method forWater-Extractable Chloride in Aggregate (Soxhlet Method)1This standard is issued under the fixed designation C1524; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the
2、 year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method provides procedures for sampling andanalysis of aggregate for water-extractable chloride usi
3、ng aSoxhlet extractor.NOTE 1This test method is to be used when significantly highchloride content has been found in aggregates, concretes, or mortars.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3 This standard does no
4、t purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standard
5、s:2C114 Test Methods for Chemical Analysis of HydraulicCementC670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC1152/C1152M Test Method for Acid-Soluble Chloride inMortar and ConcreteC1218/C1218M Test Method for Water-Soluble Chloride inMortar and Co
6、ncreteD75 Practice for Sampling AggregatesD1193 Specification for Reagent WaterE11 Specification for Woven Wire Test Sieve Cloth and TestSieves2.2 American Concrete Institute Standard:ACI 222.196 Provisional Standard Test Method for Water-Soluble Chloride Available for Corrosion of EmbeddedSteel in
7、Mortar and Concrete Using the Soxhlet Extractor33. Significance and Use3.1 Water-extractable chloride, when present in sufficientamount, has a potential to initiate or accelerate corrosion ofmetals, such as steel, embedded in or contacting a cementitioussystem, such as mortar, grout, or concrete. Th
8、is test method isapplicable when aggregates contain a high background ofnaturally occurring chloride (see ACI 222.196 ). Test MethodC1152/C1152M determines acid-soluble chloride and TestMethod C1218/C1218M determines water-soluble chloride.Both Test Methods C1152/C1152M and C1218/C1218M pul-verize t
9、he sample to a fine powder or fine granular material.The Soxhlet method is intended to use nonpulverized material.Results with some aggregates have shown that the Soxhletprocedure extracts an extremely low amount of chloride, withmost of it remaining in the rock, and therefore, it is notavailable fo
10、r corrosion.3.2 The Soxhlet extraction apparatus consists of three sec-tions: the boiling flask, which contains reagent water at thebeginning of the test; the extractor, which contains the sampleinside a thimble; and, the condenser. The extractor functions byboiling the water, which condenses and dr
11、ips on to the sample.When the water attains a fixed height above the sample, theextractor siphons the water from the thimble back to the boilingflask. The process repeats itself until the test is terminated.(Refer to Fig. 1.)4. Apparatus4.1 Sampling Equipment:4.1.1 The apparatus required for obtaini
12、ng aggregatesamples is described in Practice D75.4.2 Sampling Processing Apparatus, the same as in TestMethod C1218/C1218M without pulverization.4.3 Soxhlet Extractor Apparatus, shall have the followingminimum size and consist of the following (see Fig. 1).4.3.1 Reflux-Type Condenser, with a 34/45-m
13、m ground-glass fitting to the extractor, and having a 27-mm insidediameter by a 192-mm body length.4.3.2 Soxhlet Extraction Tube, with a 34/45-mm ground-glass fitting to the condenser and a 24/40-mm ground-glass1This test method is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete
14、 Aggregates and is the direct responsibility of SubcommitteeC09.69 on Miscellaneous Tests.Current edition approved Dec. 1, 2010. Published March 2011. Originallyapproved in 2002. Last previous edition approved in 2002 as C152402a. DOI:10.1520/C1524-02AR11.2For referenced ASTM standards, visit the AS
15、TM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American Concrete Institute (ACI), P.O. Box 9094, FarmingtonHills, MI 48333-9094, http:/w
16、ww.concrete.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.fitting to the boiling flask, for holding sample thimbles 25 mmby 80 mm (diameter by height).4.3.3 A250-mL boiling flask with a 24/40-mm ground-glassfitting.4.3.4 A heat
17、ing mantel, burner, or hot plate configured forthe flask capable of attaining 200C.4.3.5 Suitable Sample Holder, such as a porous extractionthimble having a 25-mm inside diameter and 80-mm externallength.4.4 The apparatus required for the chloride determinationstep is given in the test method for ch
18、loride in Test MethodsC114.4.5 pH Paper, short-range 0.0-3.0.4.6 Drying Oven, of sufficient size, capable of continuouslyheating at 110 6 5C.4.7 Sieve, 25.0 mm, complying with Specification E11.5. Reagents5.1 The reagents required for the chloride determination aregiven in the test method for chlori
19、de of Test Methods C114,and the Procedure section of Test Method C1218/C1218M.5.2 Reagent water is either deionized or distilled, conform-ing to the requirements of Specification D1193 for Type IIIreagent water.6. Sample Preparation6.1 Preparation:6.1.1 For Nominal Maximum Aggregate Sizes 25.0 mm or
20、Greater:Use a jaw crusher or hammer, and reduce the sample so thatthe particles pass a 25.0-mm sieve and are representative of thesample. Use a sample splitter or use coning and quartering toFIG. 1 Soxhlet Extraction ApparatusC1524 02a (2010)2reduce the sample to between 200 and 500 g. Do not crush
21、thesample to a powder. Oven dry the reduced sample at 110 6 5Cfor2h.6.1.2 For Nominal Maximum Aggregate Sizes Less Than25.0 mm :Use a sample splitter or use coning and quartering to reducethe sample to between 200 and 500 g. Do not crush the sampleto a powder. Oven dry the reduced sample at 110 6 5C
22、 for 2h.7. Procedure7.1 Mix and cone the reduced sample three times beforesampling each replicate. Obtain a minimum mass of 30.0 g ofthe sample by sampling from at least four points, record themass to the nearest 0.01 g, and transfer it to the porous sampleholder of the Soxhlet extractor. Place at l
23、east 200 mLof reagentwater in the lower flask. Conduct this procedure in triplicate.Make a blank determination by using the Soxhlet apparatus,with thimble but containing no sample.NOTE 2Replicate sample size can be larger than 30 g; however, thetop of the sample in the thimble needs to be kept below
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