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本文研究了蒸压制度、钙硅比、水固比等工艺参数对灰砂混凝土的抗压、劈拉、抗折、断裂能及碳化速度的影响。实验结果表明,随着原材料钙硅比的提高,需要较强的蒸压制度(即蒸汽压力提高、恒温时间延长)来蒸压灰砂混凝土制品;钙硅比和水固比均是影响灰砂混凝土性能的重要因素,在原材料相同、其它工艺条件不变的情况下,存在最佳钙硅比和水固比。实验得出了以特细砂为原材料制造灰砂混凝土的最佳工艺参数。
This paper studies the effects of autoclave system, calcium-to-silicon ratio, water-solid ratio, and other technological parameters on compressive strength, tensile strength, fracture resistance, fracture energy and carbonation rate of lime-sand concrete. The experimental results show that with the increase of raw material calcium-silicon ratio, a stronger autoclave system (ie, increased steam pressure and prolonged constant temperature time) is required to autoclave the lime-sand concrete products; the ratio of calcium to silicon and the ratio of water to solid are all affecting the lime sand. The important factors of concrete performance are the optimum calcium to silicon ratio and water to solid ratio when the raw materials are the same and other process conditions remain unchanged. Experiments have yielded the best process parameters for making lime-sand concrete with super fine sand as raw material.