轻集料取代碎石对混凝土强度和弹性模量影响的研究(点击标题下载全文) 已下载

作者:王发洲;邹定华;胡曙光;韩宏伟;徐华

作者单位:武汉理工大学硅酸盐材料工程教育部重点实验室湖北省孝襄高速公路建设指挥部

摘要:利用轻集料与碎石集料混合配制混凝土,可使混凝土的性能得到优化,该类混凝土已显示出较好的应用前景.通过研究轻集料取代碎石对混凝土强度和弹性模量影响规律,确定了轻集料取代率与混凝土密度、弹性模量之间的定量关系,探讨了轻集料取代碎石对混凝土极限应变的影响,提出通过集料混合调控混凝土弹性模量、提高混凝土极限应变和抗拉能力的技术思路,为新型轻质高性能混凝土的研究提供了有益的参考.

基金:国家"863"计划项目(2002AA335080);硅酸盐材料工程中心教育部重点实验室开放课题基金项目(SYSJJ2004 10).;

关键词:轻集料取代;弹性模量;抗拉强度;

DOI:10.16186/j.cnki.1673-9787.2005.02.013

分类号:TU528

Research on the influence of the substitution of normal aggregate by light weight aggregate on the strength and elastic modulus of concrete

Abstract:By mixing lightweight aggregate and normal aggregate, the performance of concrete is optimized and has a preferable prospect in application. In the article, the rule of the strength and elastic modulus of concrete affected by lightweight aggregate replacing normal aggregate is studied, and the quantitative relation between the replacing rate of lightweight aggregate, the bulk volume and elastic modulus of concrete is confirmed, the influence of lightweight aggregate replacing normal aggregate on limiting strain of concrete is explored, and the technological route by mixing different kinds of aggregates is put forward for controlling the elastic modulus of concrete, improving the limiting strain and tensile strength of concrete. The result has offered a helpful reference for the study on newtype highperformance lightweight concrete.

 
 
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