徐华
,
汪志勇
硅酸盐通报
通过实验,在同一配合比下,在不同品牌的水泥砼拌合物中加入已合成的高性能聚羧酸高效减水剂RAWY-101,研究各种砼拌合物的性能,探讨实际应用中该减水剂用量对水泥拌合物性能的影响,结果表明,当掺入水泥用量0.9％的高性能减水剂RAWY-101时,不同品牌水泥拌合的C50混凝土强度发展最快.
关键词:
聚羧酸
,
高效减水剂
,
拌合物性能
J.H. Byun
,
S.-K.Lee and B.S. Kim (Korea Institute of Machinery and Materials
,
P.O. Box 41
,
Changwon
,
Korea Manuscript received 26 August 1996)
金属学报(英文版)
In order to realize the potential of composite materials, it is imperative to develop a manufacturing process, to understand the microstructures, and to assess the structural performance of the composite. The braided-pultrusion process, which combines the pultrusion process with the braiding technology, has been developed by utilizing a novel resin impregnation device. The goal of the development is to achieve both costeffectiveness and performance of the composite. The tubular composites of diameter 5.3 mm have been produced using Kevlar 49 fiber and polyester resin. In order to assess the mechanical performance of the composites, an analytical method for predicting the elastic constants has been developed. The analysis includes the geometric model of a unit cell, coordinate transformation, and averaging of stiffness and compliance constants of the constituent materials. The analytic predictions compared favorably with experimental results.
关键词:
: braided pultrusion
,
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,
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