王洪镇1,2,李文琦1,*,甘季中1,2,杨永恒1,2,褚文斌1,温家宝1
王洪镇,李文琦,甘季中,等.碳纤维和EPS颗粒对RPC性能的影响[J].混凝土与水泥制品,2024(9):67-71.
WANG H Z,LI W Q,GAN J Z,et al.Effect of carbon fiber and EPS particles on the performance of RPC[J].China Concrete and Cement Products,2024(9):67-71.
碳纤维和EPS颗粒对RPC性能的影响
王洪镇1,2,李文琦1,*,甘季中1,2,杨永恒1,2,褚文斌1,温家宝1
王洪镇,李文琦,甘季中,等.碳纤维和EPS颗粒对RPC性能的影响[J].混凝土与水泥制品,2024(9):67-71.
WANG H Z,LI W Q,GAN J Z,et al.Effect of carbon fiber and EPS particles on the performance of RPC[J].China Concrete and Cement Products,2024(9):67-71.
摘 要:研究了不同掺量(0、0.2%、0.3%、0.4%、0.5%、1.0%)的碳纤维(CF)全取代钢纤维(SF)对活性粉末混凝土(RPC)工作性的影响,优选出了适宜CF掺量;在此基础上,研究了EPS颗粒掺量(10%、20%、30%、40%、50%)对掺CF的RPC(CF-RPC)工作性、力学性能、干表观密度和导热系数的影响,并与同EPS颗粒掺量条件下掺SF的RPC(SF-RPC)性能进行了对比。结果表明:CF的适宜掺量为0.3%;随着EPS颗粒掺量的增加,CF-RPC试件的扩展度先增大后减小,抗压强度、抗折强度、干表观密度和导热系数均降低,韧性提升;与掺EPS的SF-RPC试件相比,掺EPS的CF-RPC试件的抗压强度较低,但韧性较好,干表观密度和导热系数均较低。
Abstract: The effects of different content(0, 0.2%, 0.3%, 0.4%, 0.5%, 1.0%) of carbon fibers(CF) fully replacing steel fibers(SF) on the workability of reactive powder concrete(RPC) were investigated, and a suitable CF content was preferred. On this basis, the effects of EPS particle content(10%, 20%, 30%, 40%, 50%) on the workability, mechanical properties, dry apparent density and thermal conductivity of RPC mixed with CF(CF-RPC) were investigated and compared with the performance of RPC mixed with SF(SF-RPC) under the same EPS particle content. The results show that, the suitable content of CF is 0.3%. With the increase of EPS particle content, the extensibility of CF-RPC specimen first increases and then decreases, the compressive strength, flexural strength, dry apparent density and thermal conductivity decrease, while the toughness improves. Compared with SF-RPC specimen mixed with EPS, CF-RPC specimen mixed with EPS has lower compressive strength but better toughness, and the dry apparent density and thermal conductivity are lower.
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