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采用刀口法研究了水胶比、锂渣掺量、钢渣掺量和锂渣细度对复掺锂渣、钢渣高性能混凝土早期塑性收缩裂缝的影响,试验结果表明水胶比对混凝土早期抗裂性能影响较大,锂渣掺量和钢渣掺量分别次之。在相同条件下,复掺锂渣、钢渣高性能混凝土的早期抗裂性能优于普通水泥混凝土,锂渣细度的增加混凝土的抗裂性能先提高后降低。应用分形理论测量并计算不同细度锂渣、混凝土裂缝的分形维数为评价早期开裂提供了有力的工具。
The effects of water-binder ratio, lithium slag content, steel slag content and lithium slag fineness on the early plastic shrinkage cracks of lithium-doped dregs and high-performance steel slag concrete were studied by the knife-edge method. The experimental results show that the water- The impact of performance is larger, followed by the content of lithium slag and the content of steel slag respectively. Under the same conditions, early crack resistance of lithium-doped dregs and steel slag high-performance concrete is better than that of ordinary cement concrete. Cracking resistance of concrete with increased fineness of lithium slag first increases and then decreases. Using fractal theory to measure and calculate the fractal dimension of lithium slag and concrete with different fineness provides a powerful tool for evaluating early cracking.