高强度透水混凝土实验研究

关键字：透水混凝土,抗压强度,骨料粒径,硅灰

（1.绵阳职业技术学院，四川 绵阳  621000；2.四川省非金属复合与功能材料重点实验室-省部共建国家重点实验室培育基地，四川 绵阳  621000）

    摘要：研究了硅灰掺量、骨料粒径、骨胶比等参数对透水混凝土的抗压强度、孔隙率和透水系数的影响，确定了高强度透水混凝土的最佳配比。结果表明：骨料粒径为5～10 mm的透水混凝土强度最高；当硅灰掺量达到15%时，透水混凝土的强度最高，相比于对照组的7 d和28 d抗压强度分别提高了32.3%和27.7%，而孔隙率随着硅灰掺量的增加持续降低；随着骨胶比从2.6增大到3.8，透水混凝土的抗压强度逐渐降低，孔隙率和透水系数逐渐升高。
    关键词：透水混凝土；抗压强度；骨料粒径；硅灰
    中图分类号：TU528.2；TU528.37        文献标识码：A        文章编号：1001-702X（2017）03-0016-04

Expermental study on high-strength pervious concrete
JIANG Yong1，NIU Yunhui2，JIA Lujun1，QIAO Huanhuan1，YANG Song1
（1.Mianyang Vocational and Technical College，Mianyang 621000，China；2.State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials，Mianyang 621000，China）

    Abstract：The influence of silica fume amount，aggregate size and aggregate-binder ratio on compression strength，porosity and permeability coefficient were studied，so that the optimum proportion of pervious concrete has been confirmed. The results showed that，the pervious concrete which contain 5～10 mm aggregate has the optimal compression strength；the compression strength is the highest when silica fume amount is 15%，and compared with control group the 7 d，28 d compression strength increased by 32.3%，27.7% respectively，but the porosity continuously decreased with the increasing of silica fume amount；with the aggregate-binder ratio increases from 2.6 to 3.8，the compression strength decreased continuously，and the porosity and permeability coefficient increased gradually.
    Key words：pervious concrete，compression strength，aggregate size，silica fume