锂渣、钢渣高性能混凝土早期抗裂性能试验研究

Experimental study on the cracking resistance at early ages of high performance concrete added with lithium slag and steel slag

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。

Using knife-edge method of water-binder ratio, amount of lithium slag, steel slag content and lithium slag fineness oncomplex with lithium slag, steel slag high performance concrete plastic shrinkage, the test results showed that water binder ratio on the cracking of concrete at early age influence the performance of lithium slag content, and the steel slag content were respectively the second. Under the same conditions, combined with lithium slag, steel slag high performance concrete early cracking resistance than ordinary cement concrete, lithium slag fineness increased the crack resistance of concrete increased firstly and then decreased.Application of fractal theory to the measurement and calculation of different fineness of lithium slag, concrete crack fractal dimension for the evaluation of early cracking provide powerful tools.