摘要
聚合物—水泥界面粘结的增强以及水溶性聚合物结构的网络化已被提出可以减小无宏观缺陷 (MDF)水泥基复合材料在高相对湿度下力学性能的倒缩。通过对各种不同偶联剂掺入MDF水泥基复合材料的试验研究发现 ,微量偶联剂不仅可提高复合材料的力学性能 ,更为重要的是改善了复合材料的抗水性。若同时采用水惰性的α Al2 O3微细粉替代MDF水泥基复合材料中的未反应水泥组分 ,可以进一步提高复合材料的抗水性 ,其在水中浸泡 90d的抗折强度损失将由未改性前的 6 2 %下降到改性后的 1 5 %。
The enhancement of interface bonding between cement and polymer and the structural reticulation of the water soluble polymer are proposed to minimize the shortening of the mechanical properties of macro defect free(MDF)cement based composites at high relative humidity The MDF composites incorporated with various cross coupling agents were studied. The results show that not only can the MDF composites modified with small amounts of cross coupling agent improve the mechanical properties,but modify the water resistance of MDF composites compared to the original one In the meantime if the water resistant material such as fine powder of α alumina was used to substitute for the unreacted cement grains in the MDF composites,a more efficient improvement of water resistance would be obtained The loss in flexural strength of the MDF composites after 90 days of water immersion decreased from 62% before unmodifying to 15% after modifying
出处
《硅酸盐通报》
CAS
CSCD
2000年第4期17-22,共6页
Bulletin of the Chinese Ceramic Society
关键词
无宏观缺陷水泥基复合材料
水敏性
改性
MDF水泥
macro defect free(MDF)cement based composites cross coupling agent water sensitivity fle xural strength
