FUNDAMENTAL RESEARCH ON DEVELOPMENT OF MATERIAL DESIGN METHOD FOR HIGH PERFORMANCE CEMENTITIOUS COMPOSITES

为了研制高性能胶凝复合材料，对材料设计准则进行了研究。为达到轻质、高强、高韧性的目的，采用了细观力学方法。在填料理论的基础上讨论了基体的配合比，并对不同类型的纤维进行了实验研究。得到了以下结果：(1)填料理论可以很好地找到合适的混合比例，以产生致密的基体，从而获得高强度的基体。(2)不仅是基体和纤维的性能，而且这两种成分的合适组合对HPCC的生产非常重要。(3)排除处理对生产HPCC非常有用。(4)对试验结果进行多元回归分析，制定了最大抗弯强度、变形能力和韧性3项性能指标5项性能指标的设计准则。

In order to develop a High Performance Cementitious Composites (HPCC), material design criteria were studied. For possessing light weight, high strength and high toughness, micromechanics approach was introduced. Mix proportion of matrix was discussed on the basis of packing theory and various types of fibers were experimentally studied Effect of processing was also investigated.The following results were obtained.(1) Packing theory works well to find a suitable mix proportion to produce a dense matrix to achieve high strength matrix(2) Not only the performance of matrix and fiber, but also the suitable combination of these two components are very important to produce HPCC.(3) Exclude processing is very useful to produce HPCC.(4) Experimental results were analyzed by a multi regression analysis to formulate design criteria for five performance indexes that are the maximum flexural strength, deformability, and three toughness indexes.