ASTM C331 C331M-2010 Standard Specification for Lightweight Aggregates for Concrete Masonry Units《混凝土圬工单位的轻质集料的标准规格》.pdf
《ASTM C331 C331M-2010 Standard Specification for Lightweight Aggregates for Concrete Masonry Units《混凝土圬工单位的轻质集料的标准规格》.pdf》由会员分享,可在线阅读,更多相关《ASTM C331 C331M-2010 Standard Specification for Lightweight Aggregates for Concrete Masonry Units《混凝土圬工单位的轻质集料的标准规格》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: C331/C331M 10Standard Specification forLightweight Aggregates for Concrete Masonry Units1This standard is issued under the fixed designation C331/C331M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision, the year of last
2、revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This specification covers lightweight agg
3、regates in-tended for use in concrete masonry units when a primeconsideration is to reduce the density of the units.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard. The values stated ineach system may not be exact equivalents; therefore, eachsyst
4、em shall be used independently of the other. Combiningvalues from the two systems may result in non-conformancewith the standard. Some values have only SI units because theinch-pound equivalents are not used in practice.NOTE 1Sieve size is identified by its standard designation in Speci-fication E11
5、. The alternative designation given in parentheses is forinformation only and does not represent a different standard sieve size.1.3 The text of this specification references notes andfootnotes which provide explanatory material. These notes andfootnotes (excluding those in tables and figures) shall
6、 not beconsidered as requirements of the standard.2. Referenced Documents2.1 ASTM Standards:2C29/C29M Test Method for Bulk Density (“Unit Weight”)and Voids in AggregateC40 Test Method for Organic Impurities in Fine Aggregatesfor ConcreteC114 Test Methods for Chemical Analysis of HydraulicCementC136
7、Test Method for Sieve Analysis of Fine and CoarseAggregatesC142 Test Method for Clay Lumps and Friable Particles inAggregatesC151 Test Method for Autoclave Expansion of HydraulicCementC157/C157M Test Method for Length Change of HardenedHydraulic-Cement Mortar and ConcreteC641 Test Method for Iron St
8、aining Materials in Light-weight Concrete AggregatesC702 Practice for Reducing Samples of Aggregate to Test-ing SizeC1262 Test Method for Evaluating the Freeze-Thaw Dura-bility of Dry-Cast Segmental Retaining Wall Units andRelated Concrete UnitsD75 Practice for Sampling AggregatesE11 Specification f
9、or Woven Wire Test Sieve Cloth and TestSieves3. Aggregate Types3.1 Three general types of lightweight aggregates are cov-ered by this specification, as follows:3.1.1 Aggregates prepared by expanding, pelletizing, orsintering products such as blast-furnace slag, clay, diatomite,fly ash, shale, or sla
10、te, and3.1.2 Aggregates prepared by processing natural materials,such as pumice, scoria, or tuff, and3.1.3 Aggregates consisting of end products of coal or cokecombustion.3.2 The aggregates shall be composed predominately oflightweight-cellular and granular inorganic material.4. Chemical Composition
11、4.1 Lightweight aggregates shall not contain excessiveamounts of deleterious substances, as determined by thefollowing limits:4.1.1 Organic Impurities (Test Method C40)Lightweightaggregates subjected to the test for organic impurities thatproduce a color darker than the standard shall be rejected,un
12、less it is demonstrated that the discoloration is due to smallquantities of materials not harmful to the concrete.1This specification is under the jurisdiction of ASTM Committee C09 onConcrete and Concrete Aggregates and is the direct responsibility of SubcommitteeC09.21 on Lightweight Aggregates an
13、d Concrete.Current edition approved Dec. 15, 2010. Published January 2011. Originallyapproved in 1953. Last previous edition approved in 2005 as C33105. DOI:10.1520/C0331_C0331M-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.or
14、g. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States
15、.4.1.2 Staining (Test Method C641)An aggregate produc-ing a stain index of 60 or higher shall be rejected when thedeposited stain is found upon chemical analysis to contain aniron content, expressed as Fe2O3equal to or greater than 1.5mg/200 g of sample.4.1.3 Loss on Ignition (Test Methods C114)Loss
16、 on igni-tion of aggregates, consisting of end products of coal or cokecombustion, shall not exceed 12 %. Loss on ignition of otheraggregates shall not exceed 5 %.NOTE 2Some aggregates may contain carbonates or water of hydra-tion that contribute to loss on ignition but may not affect the quality of
17、 theproduct. Therefore, when evaluating an aggregate, consideration should begiven to the material characteristics that cause the ignition loss.5. Physical Properties5.1 Lightweight aggregate under test shall meet the follow-ing requirements:5.1.1 Clay Lumps and Friable Particles The amount ofclay l
18、umps and friable particles shall not exceed 2 % by drymass.5.1.2 GradingAggregate grading shall be by mutualagreement between interested parties. See Appendix X1 foraggregate grading guidance.5.1.3 Uniformity of GradingTo ensure reasonable unifor-mity in the gradation of successive shipments of ligh
19、tweightaggregate, fineness modulus shall be determined on samplestaken from shipments at intervals stipulated by the purchaser. Ifthe fineness modulus of the aggregate in any shipment differsby more than 7 % from that of the sample submitted foracceptance tests, the aggregate in the shipment shall b
20、erejected, unless the supplier demonstrated that it will produceconcrete of the required characteristics.5.1.4 Loose Bulk Density (Test Method C29/C29M)Theloose bulk density of lightweight aggregates shall conform tothe requirements in Table 1 using a 14 L 12 ft3 measure.5.1.5 Uniformity of Loose Bu
21、lk Density The dry loosebulk density of lightweight aggregate shipments sampled andtested shall not differ by more than 650 kg/m33 lb/ft3or7%,whichever is greater, from that of the sample submitted foracceptance tests, and shall not exceed the limits in Table 1.5.2 Concrete specimens containing ligh
22、tweight aggregateunder test shall meet the following requirements:5.2.1 PopoutsConcrete specimens prepared and tested inaccordance with 8.1 shall show no surface popouts.5.2.2 Resistance to Freezing and Thawing When re-quired, the aggregate supplier shall demonstrate by test orproven field performan
23、ce that the lightweight aggregate whenused in manufactured concrete masonry units and relatedconcrete units has the necessary resistance to freezing andthawing to perform satisfactorily in its intended use.NOTE 3Methods are available to evaluate the performance of manu-factured concrete masonry prod
24、ucts made with lightweight aggregates.For example, Test Method C1262 includes procedures for evaluatingmanufactured concrete masonry units and related concrete units, but doesnot include criteria for determining compliance. Care should be used inevaluating the results of Test Method C1262 or any oth
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMC331C331M2010STANDARDSPECIFICATIONFORLIGHTWEIGHTAGGREGATESFORCONCRETEMASONRYUNITS 混凝土 单位 集料 标准 规格

链接地址:http://www.mydoc123.com/p-466316.html