Effects of Curing Methods on the Permeability and Mechanism of Cover Concrete

作     者：Wang Hao Baolin Guo Yongzhi Guo Ruishuang Jiang Fangli Zhao Baomin Wang 

作者机构：Shandong Hi-speed Company LimitedJinanShandong250101China School of Civil Engineering Dalian University of TechnologyDalianLiaoning116000China Transportation Research Institute of Shandong ProvinceJinanShandong250100China 

出 版 物：《Journal of Building Material Science》 (建筑材料科学（英文）)

年 卷 期：2023年第5卷第1期

页      面：20-31页

学科分类：08[工学] 081304[工学-建筑技术科学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0813[工学-建筑学] 

基　　金：The authors would like to acknowledge the fi­nancial support provided by the National Key R&D Program of China(Grant number2018YFB1600100) this study is also funded by Shandong Transpor­tation Science and Technology Plan(grant number 2018B44) 

主　　题：Curing methods Cover concrete Permeability Capillary water absorption Porosity 

摘      要：Curing methods are one of the most important factors in determining the quality and compactness of cover *** effect of curing methods on the water absorption and sorptivity coefficient of cover concrete with the substitution ratio of fly ash(FA)and ground granulated blast slag(GGBS)for cement between 30 wt%and 40 wt%was studied by capillary water absorption *** vacuum saturation test and mercury intrusion test were employed to characterize these differences in the pore structure of cover concrete under different curing *** further analysis of the compactness of microstructure by SEM,the mechanism of the impact of curing methods on the permeability of cover concrete was *** results obtained indicate that the effect of curing methods on the water absorption,sorptivity coefficient and porosity of cover concrete shows the trend of natural curingcover curingwater curingstandard *** is also shown that reasonable curing is advantageous to reduce the porosity and permeability of cover *** natural curing conditions,the appearance of porosity increasing and pore structure coarsening is more critical for covering concrete with mineral admixtures than for pure cement ***,the permeability of cover concrete with mineral admixtures is more sensitive to the early-age curing methods.