摘要
研究了陶瓷纤维增强普通硅酸盐水泥基复合材料的力学性能及耐久性 .结果表明 :当在水泥砂浆中掺加长度为 5mm ,掺量为5% (质量分数 )的陶瓷纤维时 ,其抗弯增强效果可达 4 0 %左右 ;若掺加硅灰使基体颗粒粒度降低 ,则抗弯增强效果可提高至近 1 0 0 % ;在70℃湿热老化条件下 ,陶瓷纤维水泥砂浆的抗弯增强效果可长时间得以保持 ,且其抗冲击增韧效果也得以保持 ,表明陶瓷纤维在普通硅酸盐水泥中的耐久性优于抗碱玻纤 ;掺陶瓷纤维后 ,混凝土抗冻融性能明显提高 .本工作还探讨了陶瓷纤维的耐久性机理 .
Mechanical properties and durability of ceramic fibre reinforced portland cement composites were studied. The results show that when length and content of ceramic fibers are ~5 mm and 5% (by mass of cement), respectively, the flexural strength of ceramic fibre mortar can increase 40% approximately, and if the particle size of the matrix is reduced by adding 40% silica fume, it can increase about 100% at the same fibre length and same fibre content. Under 70 ℃ hydro_thermal condition, the durability of ceramic fibre will be much better than that of alkali_resistant glass fibre. The result also shows that the frost_resistant of ceramic fibre reinforced concrete is much better than that of ordinary concrete. In the present paper, the mechanism of durability of ceramic fibre in portland cement matrix is also discussed.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2000年第2期105-110,共6页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金!资助项目 ( 59572 0 2 3 )
关键词
陶瓷纤维
水泥基材料
力学性
耐久性
增强水泥
ceramic fibre
cement matrix materials
mechanical properties
durability
