摘要
为了制备超高韧性的水泥基复合材料(ultra high toughness cementitious composites,UHTCC),通过抗压、抗折以及直接拉伸试验,结合扫描电镜(SEM)测试,探讨粉煤灰掺量、石英砂掺量对UHTCC力学性能的影响;通过粉煤灰-石英砂复配,研究超高韧性水泥基材料的最优粉煤灰-石英砂掺量配比.结果表明:随着粉煤灰掺量的增加,抗压、抗折强度降低,拉伸变形增大,但是当粉煤灰质量/水泥质量(m(FA)/m(C))大于2.7后,拉伸变形提高缓慢;当石英砂质量/胶凝材料的质量(m(S)/m(B))为0.36时,拉伸变形性能最好;本文确定的最优粉煤灰-石英砂体系掺量为:m(FA)/m(C)-m(S)/m(B)=1.2-0.48,m(FA)/m(C)-m(S)/m(B)=2.2-0.36.
In order to prepare ultra high toughness cementitious composites(ultra high toughness cementitious composites,UHTCC),the dosage of fly ash and quartz sand influence of the mechanical properties of PVA fiber reinforced cementitious composites were discussed,based on the compressive test,the flexural test,the direct tensile test and the scanning electron microscope(SEM)test.In addition,the optimal dosage of fly ash-quartz sand by mixing of fly ash and quartz sand was studied.The results indicate that the more dosage of fly ash,the less compressive strength and the more tensile deformation is.However,when the quality of fly ash/the quality of cement(m(FA)/m(C))is greater than 2.7,the tensile deformation increases slowly.When the quality of sand/the quality of banding material(m(S)/m(B))is 0.36,the tensile deformation performance is the best.The research shows that the optimal dosage of fly ash-quartz sand system is m(FA)/m(C)-m(S)/m(B):1.2-0.48;m(FA)/m(C)-m(S)/m(B):2.2-0.36.
作者
李悦
朱金才
吴玉生
于鹏超
LI Yue;ZHU Jincai;WU Yusheng;YU Pengchao(The Key Laboratory of Urban Security and Disaster Engineering,Beijing University of Technology,Beijing 100124,China;Beijing Key Lab of Earthquake Engineering and Structural Retrofit,Beijing 100124,China;China Building Maternal Test&Certification Group Xiamen Hongye Co.Ltd.,Xiamen 361000,China)
出处
《北京工业大学学报》
CAS
CSCD
北大核心
2018年第4期553-560,共8页
Journal of Beijing University of Technology
基金
国家自然科学基金资助项目(51678011)
北京市属高等学校高层次人才引进与培养计划资助项目(CIT&TCD20150310)
