Plastic concrete could well adapt to foundation settlement due to its low elastic modulus and large deformation. As a result, it is widely used in the construction of cutoff wall in hydropower projects. As to the anti-seepage project of cofferdam in Lufeng nuclear power plant, in order to make full use of resources on site and reduce the cost of project, we adopted stone ballast to take the place of pebble and sand for mix proportion design of plastic concrete. Then we determined the technical indexes of plastic concrete by performance test, and detected the anti-seepage effect of the mix proportions through water injection test and hole imagery. Results show that when the sand ratio remains unchanged, the impermeability improves greatly with bentonite content increases, while the strength decreases little, which meets the requirements for performance index. The cutoff wall is also in good condition. The mix proportion with stone ballast replacing pebble and sand is verified to be feasible.
Key words
plastic concrete /
stone ballast /
mix proportion /
water injection test /
hole imagery
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] 程 瑶, 张美霞. 塑性混凝土配合比试验研究及应用[J]. raybet体育在线
院报, 2002, 19(5): 62-64.
[2] 王迎春,李家正,朱冠美,等.三峡工程二期围堰防渗墙塑性混凝土特性[J].raybet体育在线
院报,2001,18(1): 32-34.
[3] 李家正, 王迪友, 杨华全. 塑性混凝土配合比设计及试验方法探讨[J]. raybet体育在线
院报, 2002, 19(4): 58-60.
[4] 黄绪通, 杨宏伟, 刘云霞. 塑性防渗墙混凝土性能研究[J]. 水力发电学报, 1998, (2): 58-69.
[5] 刘数华, 方坤河, 曾 力, 塑性混凝土的试验研究[J]. 中国建筑防水, 2005, (10): 19-21.
[6] 李亚杰,方坤河.建筑材料[M]. 北京:中国水利水电出版社, 2009.
[7] 赵中华, 马耀辉. 塑性混凝土配合比设计[J]. 黑龙江水专学报, 2009, 36(2): 53-56.
[8] DL/T5300—2005, 水工混凝土配合比设计规程[S].北京: 中国电力出版社, 2005.
[9] SL352—2006,水工混凝土试验规程[S].北京: 中国水利水电出版社, 2006.
[10]张 鹏, 李清富. 塑性混凝土施工配合比试验研究[J]. 建筑技术, 2007, 38(8): 620-622.
[11]SL345—2007,水利水电工程注水试验规程[S].北京: 中国水利水电出版社, 2007.
PDF(769 KB)
