研究了温度、炭纤维和硅士粉含量对轻量混凝土力学性能的影响.制备了含硅土粉(质量分数0%和10%)及炭纤维(质量分数0%,0.5%,1%,和2%)的混合物,测定了高温(400℃,600℃和800℃)暴烤后轻理混凝土的压缩强度和弯曲强度.采用三个控制因素(硅土粉含量、炭纤维含量及处理温度),应用Taguchi法确定最佳条件并减少实验次数,采用方差(Anova)法确定主要实验参数与轻量混凝土力学性能的基准.结果表明:轻量混凝土力学性能最实效的参数是加热程度,而抗拉强度与抗弯强度的最佳参数各不相同.
The effect of temperature,and carbon fiber and silica fume contents on the mechanical properties (compressive and flexural strength) of lightweight concretes was investigated.Samples containing silica fume ( mass fractions of 0 and 10% ) and carbon fibers (mass fractions of 0,0.5,1,and 2% ) were prepared.The compressive and flexural strengths of the samples were determined after they had been exposed to high temperatures (400,600,and 800 ℃).The Taguchi method was used to determine the optimum conditions and to reduce the number of experiments.The significance of the three factors affecting the mechanical properties of lightweight concretes was determined using the Anova analysis and the F-test.Results showed that the most important factor for mechanical properties was temperature,followed by carbon fiber and silica fume contents.The optimum parameters for compressive strength were different from those for flexural strength.
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