硅灰改性水泥-矿渣复合材料的疏水性及耐久性研究  

Study on hydrophobicity and durability of silica fume modified cement-slag composites

作　　者：沈霁 姚力豪 王彦平 张仲杰 陈康泰 SHEN Ji;YAO Lihao;WANG Yanping;ZHANG Zhongjie;CHEN Kangtai(School of Energy and Power Engineering,Lanzhou Petrochemical University of Vocational,Lanzhou 730060,China;School of Materials Science and Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;School of Civil Engineering,Lanzhou Petrochemical University of Vocational,Lanzhou 730060,China)

机构地区：[1]兰州石化职业技术大学能源与动力工程学院,甘肃兰州730060 [2]兰州交通大学材料科学与工程学院,甘肃兰州730070 [3]兰州石化职业技术大学土木工程学院,甘肃兰州730060

出　　处：《新型建筑材料》2025年第1期56-60,共5页New Building Materials

基　　金：甘肃省高等学校创新基金(2023A-213);省级大学生创新创业训练计划项目(S202316209016)。

摘　　要：采用硅酸盐水泥和高炉矿渣为原料,PDMS为疏水剂,硅灰为增强材料,研究硅灰掺量对改性水泥-矿渣复合材料的疏水性和耐久性的影响。实验结果表明,当硅灰掺量为4%时,试样的抗压强度明显提高,28 d抗压强度可达18.33 MPa,比空白组提高24.0%,同时试样具有较强的抗冻性和抗硫酸盐侵蚀性能。防水性能实验结果表明,试样表面的静态接触角达到114°,断裂面的接触角达到134°,接触角未因硅灰的掺入而受到影响,试样的吸水率则随着硅灰掺量增加而不断减小。SEM分析显示,掺加硅灰的试样微观结构更为致密。Portland cement and blast furnace slag were used as raw materials,PDMS as hydrophobic agent,and silica fume as reinforcing material to study the effect of silica fume content on the hydrophobicity and durability of modified cement-slag composites.The experimental results show that when the silica fume content is 4%,the compressive strength of the sample is significantly improved,and the compressive strength can reach 18.33 MPa at 28 days,which is 24.0%higher than that of the blank group,and the sample has strong freeze-thaw resistance and sulfate erosion resistance.The experimental results of waterproof performance show that the static contact angle of the surface of the specimen reaches 114°,and the contact angle of the fracture surface reaches 134°,the contact angle is not affected by the incorporation of silica fume,and the water absorption rate of the sample decreases with the increase of silica fume content.SEM images show that the microstructure of the specimen with silica fume is denser.

关 键 词：矿渣 硅灰 疏水性 耐久性 

分 类 号：TU526[建筑科学—建筑技术科学]