增强材料对透水混凝土性能的影响

Influence of Reinforcing Materials on Performance of Pervious Concrete

设计增黏剂A、增强剂B、硅粉、聚丙烯纤维作为增强材料,研究其对透水混凝土性能的影响,并通过正交试验确定增强材料最优组合及关键组分。研究结果表明,增强材料最优组合为1%增黏剂A+0.5%增强剂B+2%硅粉+0.1%聚丙烯纤维,其中增黏剂A和硅粉为关键组分;采用增强材料最优组合时,可显著提高透水混凝土强度,改善透水混凝土综合性能,使透水混凝土具有高强度、高透水性的特点。选用42.5级和52.5级水泥、外掺复合增强材料时,透水混凝土透水系数为1.51~2.05mm/s,28d抗压强度达29.6~39.6MPa。

Tackifier(A),reinforcing agent(B),silica powder and polypropylene fiber were designed as reinforcing components,to study the influence on the performance of pervious concrete,and the optimal combination and the key components were determined by orthogonal test.The results showed that,the optimal combination of reinforcing materials was obtained as 1%tackifier(A)+0.5%reinforcing agent(B)+2%silica fume+0.1%fiber,among which silica fume and tackifier(A)were the key components.When the optimum combination of reinforced materials was adopted,the strength of pervious concrete could be significantly increased,the comprehensive performance of pervious concrete could also be improved,and the pervious concrete had the characteristics of high strength and high water permeability.Using 42.5 or 52.5 strength grade cement mixed with composite reinforcement materials,the prepared pervious concrete had a permeability coefficient of 1.51~2.05 mm·s;,28 d compressive strength of 29.6~39.6 MPa.