摘要
利用铁尾矿粉合成骨料取代天然骨料制备了新型透水混凝土,通过正交试验研究了合成骨料取代率对透水混凝土抗压强度和透水性能的影响。结果表明:随着合成骨料取代率的增加,混合骨料的表观密度增大、堆积密度降低、吸水率提高、空隙率增大;当水胶比为0.28~0.32时,透水混凝土的28 d抗压强度为20.0~33.6 MPa,透水系数为1.8~6.0 mm/s,符合路面面层和基层铺装的要求。
A new type of pervious concrete was prepared by replacing natural aggregate with synthetic aggregate of iron tailings powder,and the influence of synthetic aggregate replacement rate on compressive strength and permeability of pervious concrete was studied by orthogonal test.The results show that with the increase of synthetic aggregate replacement rate,the apparent density of mixed aggregate increases,the bulk density decreases,the water absorption increases and the porosity increases.When the water-cement ratio is between 0.28 and 0.32,the 28 d compressive strength of the pervious concrete is 20.0~33.6 MPa,and the permeability coefficient is 1.8~6.0 mm/s,which meets the requirements of pavement surface and base course.
作者
付祎
吴鑫淼
吴天齐
郄志红
王福州
FU Yi;WU Xin-Miao;WU Tian-qi;QIE Zhi-hong;WANG Fu-zhou(Urban and Rural Construction College of Hebei Agricultural University,Baoding 071001,China;Fengtai Power Supply Company of State Grid Beijing Electric Power Company,Beijing 100071,China;Zhengzhou Sainuo Building Material Inc.,Zhengzhou 450007,China)
出处
《混凝土与水泥制品》
2021年第9期82-85,95,共5页
China Concrete and Cement Products
基金
2020年河北省省级研究生创新资助项目(CXZZSS2020060)
邢台市科技计划项目(2019ZC018)。
关键词
铁尾矿粉合成骨料
透水混凝土
水胶比
透水系数
抗压强度
Synthetic aggregate of iron tailings powder
Pervious concrete
Water-binder ratio
Permeability coefficient
Compressive strength
