水泥稳定灰渣碎石的制备及路用性能初探

城市生活垃圾焚烧后残留了大量的灰渣,用灰渣替代部分集料制备水泥稳定灰渣碎石半刚性基层材料,进行了路用性能研究。结果表明:灰渣掺量为31.6%的情况下,与传统水泥稳定碎石相比,最大干密度降低3.9%,而最佳含水率增大62%;水泥含量增加0.5%,则材料的无侧限抗压强度提高0.52~0.63 MPa,但与相同水泥含量的传统材料相比,强度降低4.4%;水泥的含量对材料的最大干缩应变和干缩系数影响较大,当水泥含量为4.0%和4.5%时,水泥稳定灰渣碎石的最大干缩应变分别为151.8μ和185.8μ,平均干缩系数分别为40.5μ.%-1和44.0μ.%-1;与传统材料相比,平均干缩系数降低了9.2%~11.5%。

Preparation and Pavement Performance of Cement Stabilized Combustion Residues-macadam

There are a mass of combustion residues when municipal solid waste are combusted.By replacing a part of macadam,residues used as aggregates to make cement stabilized residues-macadam materials are conducted at 31.6% content of residues.And the pavement performances of this material are also conducted.The results show that,compared to the traditional cement stabilized macadam,the maximum dry density of this material decreases by 3.9%,and the optimum water content increases by 62% at the same content of cemen...