不同掺合料对水工混凝土性能影响的研究.pdfVIP

学兔兔 2012年第 12期(总第 278期 ) 混 凝 土 原材料及辅助物料 Number 12 in 2012(Total No．278) Concrete MATERIAL AND ADMINICLE doi：10．3969~．issn．1002 3550．2012．12．020 不同掺合料对水工混凝土性能影响的研究 李明霞，杨华全，闫小虎 (长江科学院 国家大坝安全工程技术研究中心水利部水工程安全与病害防治工程技术研究中心，湖北 武汉 430010) 摘 要：通过对混凝土的力学性能、耐久性能、变形性能和热学性能的研究，分析了水胶比、粉煤灰、磷渣等对普通混凝土性能的影响。 试验结果表明：不同水胶比条件下，由于磷渣的缓凝作用，早期复掺粉煤灰磷渣混凝土抗压强度低于单掺粉煤灰，后期相差不大，且各龄 期劈拉强度和轴拉强度有增高趋势。复掺粉煤灰磷渣混凝土抗渗性、抗碳化性优于单掺粉煤灰混凝土，其早期干缩略低，后期与掺粉煤灰 混凝土相当。 关键词：普通混凝土；水胶比；磷渣；粉煤灰；性能试验 中图分类号：TU528．041 文献标志码：A 文章编号： 1002—3550(2012)12—0060—03 Study on the performance of hydraulic concrete with different admixtures LIMing-xia，YANGHua—quart，YANXiao-hu (Yangtze River Scientific Research Institute，Research Center ofNational Dam Safety Engineering Technology，Research Center of Water Engineering Safety and Disaster Prevention ofMinistry ofWater Resources，Wuhan 430010，China) Abstract： Effects of water-binder ratio，fly ash and phosphorus slag on the performance of normal concrete were studied by researching me— chanical property，durability，deformation properties and thermal property of concrete．The experiment indicated that：under the different wa- ter—binder ratio only，due to the seaing retarding effect ofphosphorus slag powder，the early strength ofmixed phosphorus slag and fly ash was lower than only mixed fly ash，but the long—term strength was little difference between the two．The splitting and axial tensile strength，imperme— ability and carbonation resistance of mixed phosphorus slag and fly ash arc higher in each age，but the early shrinkage was lower．With the exten— sion ofcuring ag