掺合料对碱集料反应的抑制机制  

The Inhibition Mechanism of Admixtures on Alkali-aggregate Reaction

作　　者：赵玮 安宣波 周薇薇 ZHAO Wei;AN Xuanbo;ZHOU Weiwei(Guizhou Qiangui Engineering and Technical Services Consulting Co.,Ltd.)

机构地区：[1]贵州黔贵工程技术服务咨询有限公司

出　　处：《广东建材》2024年第8期25-29,共5页Guangdong Building Materials

摘　　要：碱集料反应(AAR)由于其破坏性以及一旦发生难以修复的性质,也被叫为混凝土的“癌症”。为了更好地降低工程中碱集料反应的发生,介绍了碱集料反应的两种类型:碱-硅酸反应(ASR)与碱-碳酸盐反应(ACR)及其膨胀机理。进而对掺合料抑制碱集料反应的机制研究现状进行了总结,从减少有效碱含量以及生成非膨胀反应产物两方面进行分析,对比了ASR和ACR的的不同抑制效果。最后对目前关于掺合料抑制碱集料反应的研究不足之处进行总结,对未来研究方向和趋势做出展望,希望对后续抑制碱集料反应的研究提供参考。Alkali-aggregate reaction(AAR)is also known as the"cancer"of concrete due to its destructive and difficult to repair properties.In order to better reduce the occurrence of alkaliaggregate reaction in engineering,two types of alkali aggregate reaction were introduced:alkalisilicate reaction and alkali-carbonate reaction and their expansion mechanism.Furthermore,the current research status of the mechanism of inhibiting alkali-aggregate reaction with admixtures was summarized,and the different inhibitory effects of ASR and ACR were compared from two aspects:reducing effective alkali content and generating non expansive reaction products.Finally,the shortcomings of the current research on the inhibition of alkali aggregate reaction by dopants are summarized,and the future research directions and trends are prospected in the hope of providing references for the subsequent research on the inhibition of alkali-aggregate reaction.

关 键 词：碱集料反应 矿物掺合料 抑制机制 预防 

分 类 号：TU528.041[建筑科学—建筑技术科学]