摘要
从不同配合比的钢纤维再生混凝土的抗折强度出发,对其在路面工程应用中的最佳配合比进行了较为系统的研究和分析。结果表明:再生粗集料的含量和水灰比等因素对钢纤维再生混凝土的抗折强度影响较大,在设计抗折强度为6.0 MPa,钢纤维的掺量在1.0%的条件下,当再生粗集料的含量小于50%,水灰比在0.44～0.47之间时,钢纤维再生混凝土28 d的抗折强度比较接近于基准钢纤维混凝土,而超出此范围时,钢纤维再生混凝土的抗折强度则会明显降低。最后结合工程应用对含30%再生粗集料的钢纤维再生混凝土的相关性能进行了检测,结果证明适当配合比的钢纤维再生混凝土能够满足级刚性路面的抗折强度要求。
In this paper, the flexural strength of steel fiber recycled concrete （SRC） is investigated, and the optimum mix proportion of SRC applied in road engineering is analyzed. The test results indicate that recycled coarse aggregate （RCA） replacement ratio and different water/cement （w/c） ratios have a great influence on SRC, in condition that the design flexural strength is 6.0 MPa and the content of steel fiber is 1.0%, when the content of RCA is less than 50% and water/cement ratios is from 0.44 to 0.47, the 28 d flexural strength of SRC is very approaching to the plain steel fiber concrete. However, if the data are not in these ranges, the flexural strength of SRC would have a sharp decrease. Finally, the SRC content with 30% RCA is applied in a trial pavement section, the data of flexural strength from in-situ could meet the demand of grade I rigid pavement.
出处
《公路》
北大核心
2008年第12期223-227,共5页
Highway
关键词
再生粗集料
钢纤维再生混凝土
水灰比
抗折强度
工程应用
recycled coarse aggregate （RCA）
steel fiber recycled concrete （SRC）
ratio of water to cement （w/c）
flexural strength
SRC applied in road engineering
