水胶比对碱骨料反应抑制措施的影响  

Effect of Water Binder Ratio on the Suppression of Alkali-Aggregate Reaction

作　　者：周述光[1,2] 张洵安[1] 

机构地区：[1]西北工业大学力学与土木建筑学院,陕西西安710072 [2]武警工程学院建筑工程系,陕西西安710086

出　　处：《建筑材料学报》2010年第4期501-504,共4页Journal of Building Materials

摘　　要：依据CECS48:93标准,以高碱水泥和活性骨料配制的砂浆棒为基准试件,研究了不同水胶比对矿物掺和料单掺、矿物掺和料+引气剂复掺、矿物掺和料+高效减水剂复掺、矿物掺和料+高效减水剂+引气剂三掺4种砂浆抑制碱骨料反应效果的影响.结果表明:当水胶比小于0.50(质量比)时,该比值越小,矿物掺和料(粉煤灰、硅灰)单掺、矿物掺和料+引气剂复掺、矿物掺和料+高效减水剂+引气剂三掺砂浆抑制碱骨料反应的效果越好;当水胶比为0.30～0.35或大于0.40时,采用高效减水剂、矿物掺和料复掺抑制碱骨料反应的效果随水胶比增大而增大.When different mineral admixtures were applied to suppress the alkali-aggregate reaction（AAR） in concrete,the water-binder ratio has some effect on it.The AAR of concrete was tested by the mortar bar method according to CECS 48：93.The mortar bars were prepared by adding mineral admixture,high efficiency water reducing agent and air entrain agent.The result shows that in case that the water-binder ratio is less than 0.50 by mass,for mineral admixture（fly ash or silica fume） alone or that with entraining agent or with super-plasticizer along with entraining agent to be added in the high performance concrete,the less the water-binder ratio,the better.However,for the case of water-binder ratio between 0.30 0.35 or greater than 0.40,the greater the water-binder rat io,the more effective to suppress the AAR by adding the mineral admixture and the super-plasticizer.

关 键 词：水胶比 碱骨料反应 抑制措施 

分 类 号：TU528.041[建筑科学—建筑技术科学]