河南地区混凝土集料碱-硅酸反应及抑制试验  

Experimental study on ASR and suppression method of concrete aggregate in Henan Province

作　　者：王俊[1,2] 苏聪聪[1] 

机构地区：[1]许昌学院土木工程学院,河南许昌461000 [2]郑州大学,郑州450001

出　　处：《河南理工大学学报（自然科学版）》2014年第4期534-538,共5页Journal of Henan Polytechnic University（Natural Science）

基　　金：河南省教育厅科学技术研究重点项目(12A560009)

摘　　要：为有效防止混凝土结构中的碱-硅酸反应,按照河南地区的山系和水系分布,依据规范JGJ52—2006,在砂、石砂资源丰富的地区,对混凝土用砂、石取样,采用快速碱活性试验法和砂浆长度法,对砂石集料进行碱活性测试.试验表明,这些地区的石子碱活性基本合格;大多地区砂的碱活性检验合格,少数地区的砂有潜在的碱活性.采用掺加粉煤灰的方法对有潜在碱活性的砂进行碱活性抑制试验,指出了粉煤灰掺量对砂的碱活性有抑制作用,当掺量为30%时效果最佳,并提出了工程应用建议.In order to effectively prevent the Alkali-aggregate reaction of a concrete structure,the sand and stone used in concrete from different regions were collected by a river system or a mountain system in Henan province,and a rapid mortar bar method or a mortar length method was used to test their Alkali-Silicate reactions according to code JGJ52-2006 of China.The test showed that the Alkaline activity of stone are up to a standard level,and the Alkaline activity of sand in most regions are up to a standard level,but some regions are opposite.Moreover,a suppression method on sand ASR by mixing fly ash was studied,and it was pointed out that the best effect optimal dosage of fly ash is 30％.These results may provide a reference for the selection of the mixture ratio of concrete in this region.

关 键 词：河南地区 混凝土集料 碱-硅酸反应 

分 类 号：TU528.1[建筑科学—建筑技术科学]