《南水北调与水利科技》：南水北调中线工程陶岔-沙河段混凝土碱骨料反应试验研究（李鹏翔,杨华全）（摘要）

发布时间：2022-02-22 15:14:15 浏览数：次

摘要：南水北调中线工程陶岔-沙河段路线长，涉及料场多，骨料品种杂。碱-骨料反应具有反应缓慢、持续时间长的特点。碱-骨料反应十分复杂，需用不同的试验方法进行综合评定。通过岩相法、砂浆棒快速法、碳酸盐圆柱体法等不同试验方法对碱活性进行了研究，试验结果表明：料场部分骨料具有潜在危害性反应的碱活性。为确保混凝土的耐久性和工程安全，应严格控制工程所用水泥的碱含量及采取其它工程措施来抑制碱-骨料反应。

关键词：南水北调中线工程；碱-骨料反应；混凝土；骨料

中图分类号：TV68；TV42 文献标识码：B 文章编号：1672-1683（2008）01-0062-04

Experimental Study on AAR from Taocha to Shahe along the Middle Route of South-to-North Water Diversion Project

LI Peng-xiang,YANG Hua-quan

(Changjiang River Scientific Research Institute,Changjiang Water Resources Commission,Wuhan 430010,China)

Abstract:There are a lot of aggregates used in the section from Taocha to Shahe along the Middle Line of the South-to-North Water Diversion Project.Because of the complexity of AAR,the activity of aggregates is determined by the different methods.AAR has the character of slow-reaction alkali activity.The time for concrete to form crack because of expansion can last several decades.The aggregates have been detemined on alkali reactivity potential by petrography method,accelerated mortar bar method,small rock column method.The results show the aggregates include alkali reactivity geeregates.To insure safety of the project,the alkali content of cement must be controlled strictly,or the others preventive measures against AAR must be used.

Key words:the Middle Route of the South-to-North Water Diversion Project;AAR;concrete;aggregates

参考文献：

[1]A.J.C.T.Cavalcanti,Alkali-Aggregate Reaction at Moxoto Dam,Brazil[C].Proceedings of the 7th International Conference on Alkali-Aggregate Reaction in Concrete.Ottawa city，1986,168-172.

[2]马塞尔·阿罗德（法国）.法国硅碱骨料中碱骨料反应的最新研究[J].中国三峡工程建设，1998，（5）.

[3]杨华全，王迎春，曹鹏举，等.三峡工程混凝土的碱-骨料反应试验研究[J].水利学报，2003，（1）.

作者简介：李鹏翔（1972-）男，湖北武汉人，高级工程师，主要从事水工建材与碱骨料反应试验研究。

来源：《南水北调与水利科技》2008年第1期

相关热词搜索： 南水北调 沙河骨料中线 混凝土