高掺粉煤灰碾压混凝土在筑坝工程中的应用  

Application of Roller Compacted Concrete with High Contents of Fly Ash in Dam Construction Project

作　　者：张汉涛 蔡杰龙 饶宇豪 ZHANG Hantao;CAI Jielong;RAO Yuhao(Meizhou Dapu Hanjiang Gaobei Water Conservancy Project Construction Management Office, Meizhou 514021, China;Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510635, China;Guangdong New Material and Structural Engineering Technology Research Center, Guangzhou 510635, China;Guangdong Provincial Key Scientific Research Base, Guangzhou 510635, China;Meizhou Water Conservancy and Hydropower Survey and Design Institute, Meizhou 514021, China)

机构地区：[1]梅州市大埔韩江高陂水利枢纽工程建设管理处,广东梅州514021 [2]广东省水利水电科学研究院,广东广州510635 [3]广东省水利新材料与结构工程技术研究中心,广东广州510635 [4]广东省水利重点科研基地,广东广州510635 [5]梅州市水利水电勘测设计院,广东梅州514021

出　　处：《广东水利水电》2020年第11期97-101,共5页Guangdong Water Resources and Hydropower

摘　　要：以广东省某大型水利工程为例,研究高掺量粉煤灰碾压混凝土的工作性能、力学性能和耐久性能,并评价其在筑坝工程中的应用效果。研究结果表明,在水胶比、砂、碎石和外加剂掺量不变情况下,高掺量粉煤灰(74%)的碾压混凝土相比较低掺量时工作性能有所改善,28 d、90 d抗压强度和劈裂抗拉强度有一定程度提高,90 d抗渗和抗冻等级均满足设计要求。现场大坝钻孔获得芯样表面光滑、致密,骨料分布均匀,芯样抗压强度、抗渗和抗冻等级均满足设计要求,筑坝工程中高掺粉煤灰碾压混凝土的应用可为国内外同类工程提供重要参考依据。The content of fly ash has an important influence on the application of roller compacted concrete in dam construction of water conservancy project.In this paper,taking a large-scale water conservancy project in Guangdong Province as an example,the working performance,mechanical properties and durability of roller compacted concrete with high content of fly ash are studied,and its application effect in dam construction is evaluated.The results show that under the condition of constant water-binder ratio,sand,macadam and admixture,the working performance of roller compacted concrete with high content of fly ash(74%)is better than that with low content,and the 28d and 90d compressive strength and splitting tensile strength are improved to a certain extent.90d impermeability and frost resistance meet the design requirements.The surface of the core sample obtained from the on-site dam drilling is smooth and dense,the aggregate distribution is uniform,and the compressive strength,impermeability and frost resistance grade of the core sample all meet the design requirements.The application of roller compacted concrete with high content of fly ash in this dam construction project can provide an important reference for similar projects at home and abroad.

关 键 词：高掺量 粉煤灰 碾压混凝土 筑坝 耐久性能 

分 类 号：TU528[建筑科学—建筑技术科学]