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无机涂层对高温后混凝土抗压强度的修复
Recovery of Compressive Strength of Concrete after Exposure in High Temperature by Inorganic Coating
投稿时间:2018-03-19  修订日期:2018-04-26
DOI:103969/j.issn.1007 9629201901009
中文关键词:  无机涂层  高温  混凝土  抗压强度
英文关键词:inorganic coating  high temperature  concrete  compressive strength
基金项目:国家自然科学基金资助项目(51208504)
           
作者单位
李庆涛
LI Qingtao
中国矿业大学江苏省土木工程环境灾变与结构可靠性重点实验室,江苏徐州221116
Jiangsu Key Laboratory Environmental Impact and Structural Safety in Engineering, China University of Mining and Technology, Xuzhou 221116, China
梁天乐
LIANG Tianle
中国矿业大学力学与土木工程学院,江苏徐州221116
School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China
杜汉丰
DU Hanfeng
中国矿业大学力学与土木工程学院,江苏徐州221116
School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China
崔壮壮
CUI Zhuangzhuang
中国矿业大学力学与土木工程学院,江苏徐州221116
School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, China
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中文摘要:
      为探究高温后劣化混凝土抗压强度的可修复性,研究了遭受高温作用后涂刷无机涂层修复剂的混凝土抗压强度随冷却方式、高温后养护时间以及修复剂用量的变化规律.研究过程中考虑了2种冷却方式(自然冷却和喷水冷却)、5种高温后养护时间(3,7,14,28,90d)以及3种修复剂用量(03,06,09kg/m2).结果表明:无机涂层修复剂能够显著改善高温后劣化混凝土的抗压强度;自然冷却时修复剂对混凝土的修复效果比喷水冷却时要好;高温后养护时间会显著影响修复剂的修复效果;03kg/m2的修复剂用量最为合理.
英文摘要:
      In order to investigate the recoverability of compressive strength of concrete after high temperature exposure, the development law of compressive strength of the concrete after high temperature exposure repaired by inorganic coating repair agent with cooling method, curing time after high temperature exposure and repair agent use level was studied. Two cooling methods(natural cooling and water cooling), five kinds of curing time after high temperature(3,7,14,28,90d) and three repair agent use levels(03,06,09kg/m2) were considered. Following conclusions can be drawn: inorganic coating repair agent can effectively improve the deteriorated compressive strength of concrete after high temperature exposure. Repairing effect on concrete by natural cooling after high temperature exposure is better than that on concrete by water cooling. Curing time of concrete after high temperature exposure relies on the repairing effect of repair agent. The most reasonable use levels of repair agent is 03kg/m2.
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