摘要
抗冲击性能是混凝土结构重要技术特征。针对超高性能混凝土(UHPC)抗冲击性能,采用不同掺量的钢纤维和橡胶颗粒,试验研究了钢纤维和橡胶掺量对UHPC的工作性能、强度和抗冲击性能的影响,并对钢纤维和橡胶颗粒掺量对UHPC的影响机理进行了分析。试验研究结果表明:随着钢纤维掺量的增加,UHPC的坍落度和扩展度均不断降低,含气量增大,强度和抗冲击性能明显增大,钢纤维可有效提高UHPC的抗冲击性能,掺量宜控制在3%之内;随着橡胶颗粒掺量的增加,UHPC的抗压强度不断降低,但坍落度、扩展度、抗折强度及抗冲击性能呈现先增大后降低趋势,掺入适量的橡胶颗粒可有效提高UHPC的抗折强度和抗冲击性能,掺量宜控制在10%之内。通过采用钢纤维和橡胶颗粒,可配制出抗冲击性能良好的UHPC。
Impact resistance is an important technical feature of concrete structures.Aiming at the impact resistance of UHPC,it uses steel fiber and rubber particles with different amounts to test and study the influence of steel fiber and rubber content on the working performance,strength and impact resistance of UHPC,and analyzes the influence mechanism of steel fiber and rubber particle content on UHPC.The test results show that with the increase of the steel fiber content,the slump and expansion of UHPC continue to decrease,the air content increases,and the strength and impact resistance significantly increase.The steel fiber can effectively improve the impact resistance of UHPC,and the content should be controlled within 3%.With the increase of rubber particle content,the compressive strength of UHPC continues to decrease,but the slump,expansion,flexural strength and impact resistance first increase and then decrease.Adding appropriate amount of rubber particles can effectively improve the flexural strength and impact resistance of UHPC,and the content should be controlled within 10%.UHPC with good impact resistance can be prepared by using steel fiber and rubber particles.
作者
王成启
郭玉林
梁远博
WANG Chengqi;GUO Yulin;LIANG Yuanbo(CCCC Shanghai Third Harbor Engineering Science and Technology Research Institute Co.,Ltd.,Shanghai 200032,China)
出处
《混凝土》
CAS
北大核心
2024年第10期21-24,31,共5页
Concrete
