花岗岩洞渣在抗渗混凝土中的应用性能研究  

Study on the application performance of granite cavern slag in impermeable concrete

作　　者：田建国 TIAN Jianguo(No.1 Engineering Co.,Ltd.of FHEC of CCCC,Beijing 102205,China)

机构地区：[1]中交一公局第一工程有限公司,北京102205

出　　处：《交通科学与工程》2024年第3期9-16,共8页Journal of Transport Science and Engineering

基　　金：中交一公局集团有限公司科技研发项目(143010100)。

摘　　要：为对隧道开挖过程中产生的大量废弃洞渣进行固废利用,以无岳高速WYTJ-07标段隧道施工项目为依托,用其产生的变质花岗岩配制机制碎石、机制砂;开展花岗岩抗渗混凝土配合比试验,揭示花岗岩洞渣对抗渗混凝土性能的影响规律,获得了C30P10花岗岩抗渗混凝土的最优配合比。试验结果表明:通过分析花岗岩洞渣的力学性能及岩石成分,判定该隧道花岗岩洞渣能满足要求,可以用来配制抗渗混凝土;根据不同配合比混凝土的坍落度、28 d抗压强度、抗渗等级,发现降低水胶比以及增大外加剂掺量能有效提高花岗岩抗渗混凝土的工作性能;当水灰比为0.43、外加剂掺量为1.1%时,C30P10花岗岩抗渗混凝土的性能满足要求,且最为经济。In order to make solid waste utilization of the large amount of waste cave slag produced during tunnel excavation,based on the engineering project of Wuyue high-speed WYTJ-07 bidding section,the produced metamorphic granite was adopted to prepare machine crushed gravel and machine crushed sand.The mix ratio experiment on the granite impermeable concrete was carried out,followed by revealing the influences of granite cave slag on the performance of impermeable concrete to determine the optimal mix ratio of C30P10 granite impermeable concrete.Experimental results show that,according to its mechanical properties and composition,the granite cave slag obtained from this tunnel site meets the requirement of preparing impermeable concrete.According to the slump degree,28 d compressive strength and impermeability grade of different proportions of concrete,it was found that reducing the water-cement ratio and increasing the amount of admixture would effectively improve the working performance of granite impermeable concrete.When the water-cement ratio is 0.43 and admixture content is 1.1%,the performance of C30P10 granite impermeable concrete meets the requirements and it is the most cost-effective.

关 键 词：混凝土 变质花岗岩 配合比优化 渗透性 抗压强度 

分 类 号：X73[环境科学与工程—环境工程] TU528[建筑科学—建筑技术科学]