混凝土骨料碱活性试验和碱-骨料反应抑制试验研究  

Experimental Research on Alkali Reactivity Test of Concrete Aggregates and Alkali-Aggregate Reaction Inhibition Test

作　　者：乐仁杰 YUE Renjie(Xinjiang Water Conservancy and Hydropower Survey and Design Institute Co.,Ltd.,Changji 831100,China)

机构地区：[1]新疆水利水电勘测设计研究院有限责任公司,新疆昌吉831100

出　　处：《中国水能及电气化》2024年第1期24-28,共5页China Water Power & Electrification

摘　　要：碱骨料对混凝土寿命具有一定的危害性。对5处料场的粗、细骨料进行的碱活性试验和碱-骨料反应抑制试验结果表明:通过岩相法初步测定5组粗、细骨料中均含有一定量的碱活性矿物成分,进而采用砂浆棒快速法测定骨料碱活性,除了LC8-TK4粗、细骨料为非活性骨料外,其余4组粗、细骨料均为具有潜在危害性反应的活性骨料,采用掺入15%、20%粉煤灰的方法抑制碱-骨料反应的发生,可为类似混凝土工程避免碱-骨料破坏提供参考。The alkali-aggregate reaction has a certain level of harmfulness to the service life of concrete.The results of alkali reactivity tests and alkali-aggregate reaction inhibition tests conducted on coarse and fine aggregates from five material yards indicate that,through lithological analysis,all five sets of coarse and fine aggregates contain a certain amount of alkali-reactive mineral components.Subsequently,the alkali reactivity of aggregates was determined using the mortar bar accelerated method.With the exception of the LC8-TK4 coarse and fine aggregates,which are non-reactive,the remaining four sets of coarse and fine aggregates are found to be potentially reactive with the potential for harmful reactions.The method of incorporating 15%to 20%fly ash is employed to inhibit the occurrence of alkali-aggregate reactions.This study provides reference and insights for preventing alkali-aggregate damage in similar concrete projects.

关 键 词：混凝土骨料 碱活性 抑制 试验 

分 类 号：TV528[水利工程—水利水电工程]