基于灰色系统理论的磷建筑石膏基胶凝材料组分优化设计研究

发布时间：2018-05-06 21:36

本文选题：磷建筑石膏 + 灰色关联度　；参考：《硅酸盐通报》2017年11期

【摘要】：以云南磷石膏为主要原料制备磷建筑石膏基胶凝材料。通过应用灰关联分析法分析磷建筑石膏基胶凝材料的组分(复合硅酸盐水泥、普通硅酸盐水泥、矿渣硅酸盐水泥、硅灰、粉煤灰、磷建筑石膏)对其绝干抗压强度的影响,确定了掺合料最佳组合为粉煤灰、矿渣硅酸盐水泥、硅灰;并运用多目标智能加权灰靶决策模型综合考虑抗压强度、抗折强度、初凝时间、终凝时间、软化系数、孔隙率六个指标,确定了其最佳配合比。试验表明:当粉煤灰∶矿渣硅酸盐水泥∶硅灰∶磷建筑石膏的配合比为6%∶5%∶3%∶86%时,其综合性能最好,绝干抗压强度为14.11 MPa,抗折强度为2.58 MPa,初凝时间为16 min,终凝时间为43 min,软化系数为0.51,孔隙率为23%。
[Abstract]:Phosphogypsum based cementitious materials were prepared from Yunnan phosphogypsum. The effects of the components of phosphogypsum based cementitious materials (composite Portland cement, ordinary Portland cement, slag Portland cement, silica fume, fly ash, phosphogypsum) on the absolute compressive strength of phosphogypsum based cementitious materials were analyzed by means of ash correlation analysis. It is determined that the best admixture combination is fly ash, slag Portland cement and silica fume, and the multi-objective intelligent weighted grey target decision model is used to synthetically consider compressive strength, flexural strength, initial setting time, final setting time, softening coefficient, etc. The optimum mix ratio was determined by six indexes of porosity. The test shows that when the mix ratio of fly ash: slag Portland cement: silica fume: phosphogypsum is 6: 5: 3: 86%, its comprehensive performance is the best. The absolute dry compressive strength is 14.11 MPA, the flexural strength is 2.58 MPA, the initial setting time is 16 min, the final setting time is 43 min, the softening coefficient is 0.51, and the porosity is 23%.
【作者单位】：昆明理工大学建筑工程学院;云南昆钢钢结构有限公司;
【基金】：国家自然科学基金(51662022) 云南昆钢钢结构有限公司资助项目
【分类号】：TQ177.377

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