摘要
利用梯度结构的概念提出了水泥基梯度功能材料的结构模型,初步研究了界面组分梯度分布和纤维梯度分布对混凝土,纤维增强混凝土和纤维增强砂浆力学性能的影响。结果表明:采用不同配比的分层配料、振动成型的方法,可以基本保证组分呈梯度连续变化;界面组分的梯度变化可以明显改善界面粘结而提高强度;纤维的梯度变化更符合受力状态,与纤维均匀分布相比,可以明显提高强度,并可以节约纤维用量。显示了水泥基梯度功能材料良好的发展前景。
A structural model of cement - based functional gradient materials is put forward based on the concept of gradient structure. The relationships between the gradient distributions of the components and fibers in the cement-based materials were investigated. The results indicate that the continuous gradient change in the components can be obtained using multi-layer vibration method. The bending and compressive strengths of concrete and mortar (FGDCM) reinforced with fibers with gradient distribution were greatly increased in comparison with homogeneous distribution.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
2002年第6期803-806,共4页
Journal of The Chinese Ceramic Society
基金
河南省自然科学基金资助项目(984042600)
混凝土国家重点实验室资助项目(教育部教技司[2000]123号)。
关键词
力学性能
水泥基复合材料
组分梯度分布
纤维梯度分布
强度
cement-based materials
component gradient distribution
fiber gradient distribution
strength
