界面处理对硫铝酸盐水泥修补砂浆黏结性能的影响  

Influence of interface treatment on bonding performance of sulphoaluminate cement repairing mortar

作　　者：王业民 张贤 卢晓磊[2] 杜鹏[2] WANG Yemin;ZHANG Xian;LU Xiaolei;DU Peng(Jinan Tianrongxiang Concrete Co.,Ltd.,Jinan 250100,China;Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials,University of Jinan,Jinan 250022,China)

机构地区：[1]济南天荣祥混凝土有限公司,山东济南250100 [2]济南大学山东省建筑材料制备与测试技术重点实验室,山东济南250022

出　　处：《混凝土与水泥制品》2023年第8期6-9,14,共5页China Concrete and Cement Products

基　　金：国家“科技助力经济2020”重点专项项目(2020YFB0312100ZL);山东省自然科学基金项目(ZR2020QE047)。

摘　　要：基于水灰比对硫铝酸盐水泥(SAC)修补砂浆界面弯拉强度的影响,确定了SAC修补砂浆最佳配合比,并研究了增大粗糙度、不同溶液浸润的界面处理方式对SAC修补砂浆新旧界面弯拉强度的影响。结果表明:SAC修补砂浆的3 d界面弯拉强度随着水灰比的减小逐渐增大,当水灰比为0.35时,SAC修补砂浆界面弯拉强度达到最高,为3.82 MPa;对界面进行粗糙处理可显著提高SAC修补砂浆1、3、28 d新旧界面弯拉强度,相较于界面未进行处理组分别提高了1.03、1.08、0.64 MPa;与粗糙处理方式相比,对界面进行水浸润或碱溶液浸润处理均对SAC修补砂浆的新旧界面弯拉强度不利。Based on the influence of water cement-ratio on the interfacial flexural-tensile strength of SAC repairing mortar,the optimal mix proportion of SAC repairing mortar was determined,and the influence of interface treatment methods of increasing roughness and different solution infiltration on the interfacial flexural-tensile strength of SAC repairing mortar was studied.The results show that the 3 d interfacial flexural-tensile strength of SAC repairing mortar gradually increases with the decrease of water-cement ratio.When the water-cement ratio is 0.35,the interfacial flexural-tensile strength of the SAC repairing mortar reaches the highest,which is 3.82 MPa.Roughening the interface can significantly improve the new old interfacial flexural-tensile strength of SAC repairing mortar at 1,3,28 d,which is 1.03,1.08,0.64 MPa higher than that of the untreated group,respectively.Compared with the rough treatment method,water immersion or alkali solution immersion treatment on the interface is not conducive to the new old interfacial flexural-tensile strength of SAC repairing mortar.

关 键 词：硫铝酸盐水泥 修补砂浆 水灰比 界面 粗糙处理 界面弯拉强度 

分 类 号：TU528.01[建筑科学—建筑技术科学]