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ASTM C586-2005

混凝土集料用碳酸盐岩潜在碱性反应率的试验方法(岩石柱体法)

Standard Test Method for Potential Alkali Reactivity of Carbonate Rocks for Concrete Aggregates (Rock Cylinder Method)

适用范围:<p id="s00010">This test method is intended to give a relatively rapid indication of the potential expansive reactivity of certain carbonate rocks that may be used as concrete aggregates. The test method has been successfully used in (<span class="italic">1</span>) research and (<span class="italic">2</span>) preliminary screening of aggregate sources to indicate the presence of material with a potential for deleterious expansion when used in concrete.</p> <p id="s00011">The test method is intended as a research and screening method rather than as the basis of a specification requirement. It is intended to supplement data from field service records, petrographic examinations according to Guide C 295<astmref rid="a00002">, and tests of aggregate in concrete according to Test Method C 1105<astmref rid="a00003">.</p> <p id="s00012">Alkalies participating in the expansive reactions with aggregate constituents in concrete usually are derived from the hydraulic cement; under certain circumstances they may be derived from other constituents of concrete or from external sources. Two types of alkali reactivity of aggregates are recognized: (<span class="italic">1</span>) alkali-silica reaction involving certain siliceous rocks, minerals, and artificial glasses, and (<span class="italic">2</span>) alkali carbonate reaction involving dolomite in certain calcitic dolomites, dolomitic limestones, and dolostones. This test method is not suitable as a means to detect alkali-silica reaction.</p><p>1.1 This test method covers the determination of the expansion of a specimen of carbonate rock while immersed in a solution of sodium hydroxide (NaOH) at room temperature. The length changes occurring during such immersion indicate the general level of reactivity of the rock and whether tests should be made to determine the effect of aggregate prepared from the rock upon the volume change in concrete.</p><p>1.2 <i>This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.</i></p><p>1.3 The values stated in SI units are to be regarded as the standard. The inch-pound units in parentheses are provided for information only.</p>

实施日期: 2005-05-15

中标分类号: Q13 - 建材 - 混凝土、集料、灰浆、砂浆

ICS分类号: 91.100.30 - 建筑材料和建筑物 - 混凝土和混凝土制品

标准组织: ASTM - 美国材料与试验协会标准

全文来源: WF

中文关键词: 集料 强碱 碳酸盐 水泥 混凝土 试验 施工材料

语种: 汉语

页数: 5

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