温度和供碱方式对砂岩ASR的影响  

EFFECTS OF TEMPERATURE AND ALKALI SUPPLY WAYS ON ASR OF SANDSTONE

作　　者：石研然[1,2] 丁建彤[2] 白银[2] 

机构地区：[1]河海大学力学与材料学院,南京210098 [2]南京水利科学研究院水文水资源与水利工程科学国家重点试验室,南京210024

出　　处：《低温建筑技术》2014年第4期22-24,共3页Low Temperature Architecture Technology

摘　　要：参照砂浆长度法和砂浆棒快速法,研究了温度和供碱方式对砂岩砂浆试件ASR的影响。试验结果表明,提高养护温度可以加速砂岩的ASR反应速率,但会降低砂岩砂浆试件的最终膨胀率。低温养护条件下,供碱方式会影响砂岩砂浆试件的ASR反应速率,高温养护条件下,供碱不仅应影响砂浆的ASR速率,还会对试件随龄期的膨胀曲线趋势产生明显影响。高温养护条件下,砂浆试件膨胀率随时间的变化,可用双曲函数较好的拟合。This paper referred to mortar-bar method and accelerating mortar-bar method, studied the effects of temperature and alkali supply ways on ASR of sandstone mortar specimen. The test results showed that increasing the curing temperature can accelerate the reaction rate of ASR, but will reduce the final expansion of sandstone mortar specimens. Under low curing temperature, alkali supply ways can af- fect the rate of ASR of sandstone mortar specimens. Under high curing temperature, alkali supply ways can not only affect the reaction rate,but also have a significant impact on the trend curve of expansion, which changes along with age.

关 键 词：ASR 温度 供碱 

分 类 号：TU528.36[建筑科学—建筑技术科学]