In order to effectively solve the problems on protection layer shedding and steel corrosion of concrete structure aroused by harsh environmental erosion,the development of high-performance protection mortar has become a major issue.The orthogonal experiment of L9(33) was used to study the effects of three factors,including polymer/cement ratio (P/C),sand/cement ratio (S/C) and PVA fiber loading (wPVA),on the flexural strength,compressive strength,bond strength and shrinkage rate of repaired mortar.Comprehensively considering various factors on bond strength and practical application of the repair mortar,given optimal mix ratio was:P/C,S/C,wPVA was at 15%,1.5∶1,1.5kg/m3,respectively.
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基金资助
国家自然科学基金(51578297,51878364,51878366);山东省自然科学基金重大基础研究项目(ZR2017ZC0737);山东省自然科学基金面上项目(ZR2018MEE043);青岛市政府采购项目(402019201700013);受高等学校学科创新引智计划国家“111”项目资助
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