高性能混凝土减缩抗裂关键技术试验研究  

Experimental Study on Key Technology of Shrinkage Reducing and Anti-cracking for High Performance Concrete

作　　者：岳红宇[1] 周建林[1] 

机构地区：[1]江苏省交通工程建设局,江苏南京210004

出　　处：《现代交通技术》2017年第3期44-49,共6页Modern Transportation Technology

摘　　要：文章以灌河大桥项目为依托,通过优化配合比设计并采取相应的温控技术,成功地控制了承台大体积混凝土的开裂问题;针对大桥箱梁高强混凝土及薄壁结构特点,分别选用了一元醇、二元醇、氨基醇以及具有支链结构的醇类,研究不同加成数量EO(环氧乙烷)的丁醇醚、疏水性更强的PO(环氧丙烷)基团以及HLB(亲水亲油平衡值)对混凝土力学性能以及含气量的影响,优化了高性能混凝土制备工艺,保证了大桥高性能混凝土的抗裂性能。Based on the project of Guan river bridge, crack of mass concrete of pile caps is controlled by optimizing the mixture ratio and using temperature control technologies. According to the characteristics of high strength concrete and thin-walled structure, monohydric alcohol, dihydric alcohol, amino alcohols and alcohols with branched alcohols are chosen, the effects of butyl alcohol ether with different epoxy ethane, epoxy propane groups and hydrophilic equilibrium value on mechanical properties and gas content of concrete are analyzed, the preparation process of high performance concrete is optimized to ensure crack resistance of high performance concrete.

关 键 词：斜拉桥 高性能混凝土 抗裂性能 减缩剂 

分 类 号：U444[建筑科学—桥梁与隧道工程]