摘要
利用木浆纤维制备了水泥基复合材料,研究了木浆纤维掺量、水灰比等因素对水泥基复合材料力学性能及界面微观结构的影响。结果表明,木浆纤维对水泥基复合材料具有增强作用,且存在最佳掺量。当木浆纤维掺量一定,水灰比为0.3时,对基体的增强效果最为明显;当水灰比一定时,纤维的最佳掺量为1 kg/m^3,在此掺量下,水泥基复合材料抗折和抗压强度分别提高9.4%和15.3%。对木浆纤维进行了碱处理,测得其抗腐蚀能力较好。使用SEM分析发现木浆纤维的掺入可以有效改善材料的孔结构和微裂纹,从而提高了水泥基复合材料的力学性能。
Cement- based composite was produced by using wood pulp fiber. Then we obtained the optimal test conditions for A （content of wood pulp fiber）, B （water/cement ratio）, C （alkali solution）. On the basis of testing we observed wood pulp fiber -cement interface by SEM, and compared with the same soaking environment in alkaline solution of wood pulp fibers.The experiment results show that when the mixing amount of wood pulp fiber is constant, when the water cement ratio is 0.3, the flexural strength and compressive strength can be increased mostly. Whilewater cement ratio is constant, there exists an optimum value of mixing amount of wood pulp fi- ber, which equal to 1.0 kg/m3 .In this condition, the flexural strength and compressive strength of composites can be increased 9.4% and 15.396, respectively. Scanning electron microscope analysis shows that the wood pulp fiber can effectively improve the structure of pores and cracks, as a result the mechanical properties of composites are increased.
出处
《混凝土》
CAS
北大核心
2016年第5期81-83,90,共4页
Concrete
基金
国家自然科学基金青年基金项目(51302195)
十二五国家科技支撑计划(2014BAB15B01)
关键词
木浆纤维
水泥基材料
抗压强度
抗折强度
wood pulp fiber
cement composite
compressive strength
flexural strength
