摘要
对利用未经淡化处理海砂配制的超高性能混凝土(UHPC)的抗压强度、抗折强度、劈裂抗拉强度、弹性模量、抗冻性能、抗氯离子渗透性能和护筋性能进行了系统的试验研究。结果表明:抗压强度、抗折强度和劈裂抗拉强度分别大于120 MPa、20 MPa和12 MPa,弹性模量大于40 GPa,其抗冻等级超过F500,电通量值不超过50 C,力学性能和耐久性指标均满足GB/T 31387—2015《活性粉末混凝土》的要求。此外,本试验显示,经过40次的盐水浸烘循环试验后,未淡化海砂UHPC中的钢筋锈蚀风险较低。
The compressive strength,flexural strength,splitting tensile strength,elastic modulus,frost resistance,chloride-permeation resistanceand protection for steel of ultra-high performance concrete(UHPC)made with untreated sea sand were studied.The results of research show that:compressive strength,flexural strength,splitting tensile strength and elastic modulus are higher than 120 MPa、20 MPa、12 MPa and 40 GPa respectively,and the frost resistance degree far exceedes F500 and electric flux is less than 50 C.According to the above results,the mechanical property and durability can meet the requirements of current national standard GB/T 31387—2015 Reactive Powder Concrete.In addition,through 40 times of salt water immersion drying cycle test,the steel in UHPC made with untreated sea sand shows low risk of corrosion.
作者
王晶
王祖琦
倪博文
周永祥
宋普涛
冷发光
WANG Jing;WANG Zu-qi;NI Bo-wen;ZHOU Yong-xiang;SONG Pu-tao;LENG Fa-guang(China Academy of Building Research Co.,Ltd.,Beijing 100013,China;Hunan University,Changsha 410082,China)
出处
《混凝土与水泥制品》
北大核心
2020年第4期19-23,共5页
China Concrete and Cement Products
基金
“十三五”国家重点研发计划项目（2016YFC0701000）
关键词
未淡化海砂
超高性能混凝土
钢纤维
降黏剂
耐久性
Untreated sea sand
Ultra-high performance concrete
Steel fiber
Viscosity reducer
Durability
