钢纤维混凝土与既有混凝土粘结劈拉及抗渗性能试验研究-水工结构工程专业论文.docxVIP

ABSTRACTThrough ABSTRACT Through the experimental study,it is explored that bond splitting tensile properties between SFRC and exiting concrete、the bonding inteffaces antifreeze splitting tensile properties and seeping behavior．The main research works have been accomplished in this paper： l、Through the experiments on 81 bonding specimens between SFRC and existing concrete with the dimensions of 100mmxl00mmxl00mm and 30 bonding specimens of 150mmxl50mmxl50mm,the effects ofsteel fiber volume fractions and pouring methods on bond splitting tensile properties were studied，also the effects of size effect on the bond splitting tensile strength and the effects of fiber volume fractions on breakage deformation of the bonding specimens were studied．The calculating mode of the bond splitting tensile strength considering the impacting of fiber volume fractions、the old concretes splitting tensile strength、roughness and adhesion agent was built．And the conversion coefficients about size effectⅥfas givea． 2、Through the experiments on 30 overall SFRC specimens with the dimensions of 100minxl00mmx400mm、120 overall SFRC specimens of 100mmxl00mmxl00mm and 105 bonding specimens bclw∞n SFRC and existing concrete witll the dimensions of lOOmm×lOOmmxlOOmm，the impacting of steel fiber volume fractions and the numbers of freeze-thaw cycling on bond splitting tensile strength were investigated with the method of fast freezing and thawing test．The results show that after the incorporation of steel fiber,the frost resistance of the overall and bonding concrete are both improved significantly．At last, based the established mode，the calculating mode of the splitting tensile strength of the bonding interface is established further,which considers numbers offreeze-thaw cycle． 3、According to the eurrerR impervious testing standard method in China,through the seeping behavior experiments of 36 overall concrete specimens and 30 bending interface specimens between SFRC and existing concrete，we Call