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在spss19.0软件的基础上,基于正交试验运用统计学的知识分析了锂渣与钢渣对高性能混凝土早期抗裂性的影响。试验表明,锂渣与钢渣之间存在交互作用,实验范围内随着水胶比的增加锂渣在一定程度上可以提高混凝土的早期抗裂性,但是钢渣对混凝土的早期抗裂性没有贡献。通过对比试验发现:随着锂渣细度的增加,混凝土早期抗裂性能先减小后增加然后再减小,且锂渣比表面积为624 m2/kg左右时混凝土早期抗裂性能最佳;锂渣细度与混凝土裂缝的分形特征正相关但并不显著,且分形维数随着锂渣细度的增加先减小再增加,当锂渣比表面积为576 m2/kg左右时混凝土的开裂形式最简单。
On the basis of spss19.0 software, the influence of lithium slag and steel slag on the early crack resistance of high performance concrete was analyzed based on orthogonal test using statistical knowledge. Experiments show that there is interaction between lithium slag and steel slag. With the increase of water / cement ratio, lithium slag can improve the early crack resistance of concrete, but the slag does not contribute to the early crack resistance of concrete. The results show that with the increase of lithium slag fineness, the early cracking resistance of concrete decreases firstly and then increases and then decreases, and the initial crack resistance of concrete is best when the specific surface area of lithium slag is 624 m2 / kg; The fineness of slag is positively correlated with the fractal characteristics of concrete cracks but not significant, and the fractal dimension first decreases and then increases with the increasing of the fineness of lithium slag. When the specific surface area of lithium slag is about 576 m2 / kg, the cracking form of concrete the easiest.