摘要
本文对无宏观缺陷(Macro-Defect-Free MDF)的水泥基复合材料进行了研究。在改变不同水灰比及不同添加剂含量的条件下,对各类试样的主要力学性能进行了测定。结果表明,只有当水、灰及添加剂的含量控制在适当配比时,才能获得最佳的力学性能。MDF 水泥的抗弯强度比普通水泥的强度提高约10—20倍。还采用扫描电镜观察了微观组织的孔隙尺寸、孔隙密度以及试样的断口形貌。对不同情况下的孔隙率和孔隙尺寸对力学性能的影响以及添加剂的作用机理进行了讨论。
This paper describes the studies of the mechanical properties of the compo-site materials of Macro-Defect-Free (MDF) cements.The mechanical properties of thespecimens prepared under different conditions have been examined.These properties Willbe varied with the ratio of water:cements:polymer.The optimum mechaincal.opropertieswill be obtained if this ratio is controlled to a proper value.The flexural strength of MDFcements is about 10—20 times higher than the conventional cements.In addition,themicrostructures of the samples and the fractography were studied with a scanning electronmicroscope.The influence of porosity and pore size on mechnical properties have been dis-cussed.
关键词
水泥基
复合材料
材料结构
cement
high polymer
composite materials
cement-base composite materials
