天然与再生集料透水混凝土对比试验

发布时间：2019-06-08 18:07

【摘要】：为了开发具有可接受的透水性和强度的透水混凝土,使用天然和再生集料,采用最佳的混合比例制备透水混凝土,对透水混凝土进行孔隙率、渗透系数、抗压及抗弯强度试验,研究了再生集料对总孔隙率、强度和渗透性的影响.同时,在混合料中引入了丁苯橡胶类可再分散性聚合物粉末(RPP)和胶乳(Latex)以提高其强度特性.试验结果表明:掺加再生集料的透水混凝土总孔隙率比采用天然集料的透水混凝土孔隙率要高;无论何种集料类别,聚合物改性剂的添加使得总孔隙率略有降低;使用再生集料透水混凝土的抗压强度低于使用天然集料的透水混凝土;然而,当使用聚合物改性剂时,采用天然和再生集料透水混凝土的抗压强度分别提高57%和79%;再生集料及最佳聚合物掺量的使用可以生产出具有足够排水和强度特性的透水混凝土.
[Abstract]:In order to develop permeable concrete with acceptable permeability and strength, permeable concrete was prepared by using natural and recycled aggregates, and the permeable concrete was prepared by using the best mixing proportion. The porosity, permeability coefficient, compressive strength and bending strength of permeable concrete were tested. The effects of regenerated aggregates on total porosity, strength and permeability were studied. At the same time, styrene-styrene rubber redispersible polymer powder (RPP) and latex (Latex) were introduced into the mixture to improve its strength characteristics. The experimental results show that the total porosity of permeable concrete with recycled aggregate is higher than that of permeable concrete with natural aggregate, and the total porosity is slightly decreased by adding polymer modifier regardless of the type of aggregate. The compressive strength of permeable concrete with recycled aggregate is lower than that of permeable concrete with natural aggregate, however, when polymer modifier is used, the compressive strength of permeable concrete with natural aggregate and recycled aggregate is increased by 57% and 79%, respectively. Permeable concrete with sufficient drainage and strength can be produced by using recycled aggregate and optimum polymer content.
【作者单位】：东北林业大学土木工程学院;
【基金】：中央高校基本科研业务费专项资金资助项目(2572014BB11) 中国博士后科学基金面上资助项目(2012M511910)
【分类号】：TU528

【共引文献】