水工混凝土渗流侵蚀渗透试验研究  

Experimental study of seepage inflow erosion processes in concrete

作　　者：盛金昌[1] 贾春兰[1] 张羽[2] 詹美礼[1] 李建会[3] 

机构地区：[1]河海大学水利水电学院,南京210098 [2]广东省水利电力勘测设计研究院,广州510635 [3]中国水电顾问集团成都勘测设计研究院,成都610072

出　　处：《水力发电学报》2013年第6期216-221,共6页Journal of Hydroelectric Engineering

基　　金：国家自然科学基金(50779012);教育部博士点基金-新教师类(20100094120004)

摘　　要：混凝土结构受到物理、化学以及生物等外界环境因素的侵蚀作用时,会使已经硬化后的水泥石遭到破坏,耐久性下降,强度降低。本文针对不同配比混凝土试样,设计了地下水和碳酸溶液条件下的多组侵蚀试验。通过试验发现水灰比越大,其结构受到的侵蚀性越强;掺有粉煤灰的混凝土比普通混凝土试样的抗侵蚀性要强;粉煤灰掺量较多的混凝土其早期抗侵蚀性的能力比较弱。总结了普通混凝土和掺粉煤灰混凝土渗出液中钙离子的溶出规律、结构渗透系数的变化规律。Hardened cement pastes of hydraulic structures are often destroyed and their durability and strength are reduced, under the erosion of external environments such as physical, chemical, biological factors, This experimental study designed many groups of erosion tests on concrete samples of different mix ratios by using different liquids of groundwater and carbonic acid solution. The experiment revealed that the erosion intensity of the structure is higher at larger water-cement ratio, and that a suitable addition of pulverized fly ash to the ordinary concrete results in a greater erosion-resistance of the mixture but an overuse of fly ash would lower the erosion-resistance at the early erosion stage. A summary on the release of calcium ions of exudations and the variations in structural permeability coefficients for normal concrete and fly ash mixing concrete is presented.

关 键 词：水工材料 渗透侵蚀 试验研究 混凝土 碳酸溶液 渗透系数 

分 类 号：TV43[水利工程—水工结构工程]