掺锂渣再生粗骨料混凝土力学性能试验研究

Experimental research on the mechanical properties of lithium-doped slag recycled coarse aggregate concrete

研究了再生粗骨料替代率和锂渣掺量对再生粗骨料混凝土力学性能的影响。结果表明:未掺入锂渣时,随再生粗骨料替代率的增大,试件的强度均出现先提高后降低的趋势,当再生粗骨料替代率为30%时强度最高;当再生粗骨料替代率为0时,随锂渣掺量的增加,试件强度会不断的提高,当锂渣掺量为20%时强度达到最高;二者同时作用,当再生粗骨料替代率30%、锂渣掺量20%时,试件的立方体抗压强度、轴心抗压强度、劈裂抗拉强度、抗折强度较基准混凝土分别提高39.90%、48.22%、38.21%、12.19%。

Experimental study on the fundamental mechanical properties effect factors of lithium-doped slag recycled coarse aggregate concrete specimens is carried out with different ratios of recycled coarse aggregate and lithium slag. The result showed that when adding lithium slag only,with the increase of RCA replaces rate specimens of strength appeared to first increased and then decreased,peak appears in the RCA replacement rate is 30%. When the ratios of recycled coarse aggregate replacement is 0, with LS content increases,the strength of specimens show a rising trend,peak appears in the LS dosage is 20%. When both of recycled coarse aggregate and lithium slag effects,the proportion for RCA replacement rate is 30%,the LS dosage is 20%. Compared with ordinary concrete the compressive strength,the axial compressive strength,axial splitting tensile strength and folding strength respectively increase 39.90%,48.22%,38.21%, 12.19%.