Development and evaluation of high strength and the high toughness strain-hardening cementitious composite

本文的目的是发展应变硬化胶凝复合材料（SHCC）的材料设计，使其在拉应力下具有较高的强度和韧性。为此，有必要选择合适的纤维种类和基质的混合比例，并明确条件的构成。本研究旨在阐明混合纤维对钢纤维和合成纤维SHCC单轴拉伸性能的综合影响。结果表明：掺加适量的钢和合成纤维可以提高材料的抗拉强度和韧性；最后，加入足够的钢纤维，降低水胶比，将高强度分散到钢纤维上，提高了复合材料的抗拉强度和韧性。

The purpose of this paper is to develop the material design of Strain Hardening Cementitious Composites (SHCC) which has high strength and toughness under tensile stress. For this purpose, it is necessary for appropriate kinds of fiber and mix proportion of matrix to be chosen and for constitution of conditions to be clarified. The present study aims to clarify combined effects of fiber cocktail on the tensile properties under uniaxial tensile stress of SHCC using steel fibers and synthetic fibers. In the result, firstly, it was revealed that tensile strength and toughness can be enhanced by mixing steel and synthetic fiber of appropriate quantity. Finally, mixing enough steel fiber and lowering the water-binder ratio, the tensile strength and toughness of the composites increases by dispersing high strength to depend on steel fiber.