新型材料提高既有建筑混凝土强度和耐久性方法及其机理的分析比较  

Analysis and Comparison of Methods and Mechanisms for Improving Strength and Durability of Existing Concrete Structures

作　　者：韩兵康[1] 奥斯卡 HAN Binkang;TENIZBAEV Askar(Department of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《结构工程师》2018年第4期44-52,共9页Structural Engineers

摘　　要：主要介绍水泥基渗透结晶型材料对既有建筑混凝土强度和耐久性的作用机理,影响钢筋混凝土结构耐久性和强度的因素和目前工程上其他经常采用的混凝土保护材料。描述结晶沉淀剂与水泥石中氢氧化钙的化学反应和结晶沉淀剂对混凝土的促凝作用和解决方法,钙离子螯合剂对涂层和混凝土中的钙离子螯合作用和对水泥基渗透结晶材料的缓凝作用机理。This paper mainly introduces improving mechanisms of cement based capillary crystalline materials onstrength and durability ofexisting concrete structures,and factors affecting durability and strength of reinforced concrete structures.This study also introduces some other frequently used concrete protective materials.The crystallization reaction and crystallization agent with calcium hydroxide in cement paste,precipitant coagulation effect of concrete and its solution were described.The calcium ion chelating effect on calcium ion in coating and existing concrete structures,and retarding mechanisms of cement based permeable crystalline materials were also investigated.

关 键 词：既有建筑 渗透结晶 活性物质选择 混凝土 强度和耐久性 

分 类 号：TU528[建筑科学—建筑技术科学]