综合管廊用气密性混凝土的制备及应用研究  

Preparation and Application of Airtight Concrete for Utility Tunnel

作　　者：刘华东 张荣华 蒋小勇 桂根生 吴鑫 LIU Hua-dong;ZHANG Rong-hua;JIANG Xiao-yong;GUI Gen-sheng;WU Xin(Sichuan Huaxi lvshe building materials Co.,Ltd.,Chengdu 610051,China)

机构地区：[1]四川华西绿舍建材有限公司,四川成都610051

出　　处：《混凝土与水泥制品》2021年第6期46-49,共4页China Concrete and Cement Products

基　　金：四川省先进材料重大科技专项项目(2019ZDZX0024)。

摘　　要：为避免综合管廊燃气泄漏造成的安全隐患,制备了气密性能符合要求的气密性混凝土,研究了胶凝材料用量、水胶比、砂率、矿物掺合料以及外加组分对综合管廊用气密性混凝土性能的影响。根据试验结果,成功制备了工作性良好的C40气密性混凝土,其透气系数达到4.72×10-12 cm/s,并成功应用于实际工程。In order to avoid the potential safety hazard caused by gas leakage in utility tunnel,the effects of cementitious material dosage,W/C,sand ratio,mineral admixtures and additional components on airtight concrete for utility tunnel were studied.According to the test results,C40 airtight concrete with good workability is successfully prepared,and its air permeability coefficient reaches 4.72×10-12 cm/s,which is applied to practical engineering successfully.

关 键 词：气密性混凝土 综合管廊 透气系数 工作性 

分 类 号：TU528.32[建筑科学—建筑技术科学]