用轻质颗粒材料改善贫胶凝砂砾石耐久性的研究
|
摘要
研究了不同轻质颗粒对贫胶凝砂砾石耐久性的影响。试验结果表明:陶砂与100目橡胶粉可改善贫胶凝砂砾石的抗冻性,200次冻融循环后,其抗压强度损失为6.97%与6.29%;陶砂与EPS粒子可有效改善贫胶凝砂砾石的抗渗性,采用Torrent法测其表面气体渗透系数分别为1.515×10~(-16)m~2与1.292×10~(-16)m~2;掺加陶砂的贫胶凝砂砾石的干燥收缩为205×10~(-6),小于基准组的245×10~(-6)可稍微降低其变形性能。
It studied the effects of the durability of lean cemented sand and gravel(CSG)by adding the lightweight particles.The results shows that ceramic sand and rubber powder 100 mesh can improve freezing resistance of the lean CSG.After 200 times freeze-thaw cycle,the loss of compressive was 6.97% and 6.29% respectively.And ceramic sand and EPS particle can improve anti-permeability of the lean CSG.The permeability of lean CSG adding ceramic sand and EPS particle respectively was 1.515×10~(-16)m~2 and 1.292×10~(-16)m~2 by Torrent rule.The drying shrinkage of lean CSG adding ceramic sand was 205×10~(-6),less than 245×10~(-6) of control group.
It studied the effects of the durability of lean cemented sand and gravel(CSG)by adding the lightweight particles.The results shows that ceramic sand and rubber powder 100 mesh can improve freezing resistance of the lean CSG.After 200 times freeze-thaw cycle,the loss of compressive was 6.97% and 6.29% respectively.And ceramic sand and EPS particle can improve anti-permeability of the lean CSG.The permeability of lean CSG adding ceramic sand and EPS particle respectively was 1.515×10~(-16)m~2 and 1.292×10~(-16)m~2 by Torrent rule.The drying shrinkage of lean CSG adding ceramic sand was 205×10~(-6),less than 245×10~(-6) of control group.
引文
[1]李新宇,任金明,陈永红,等.胶凝砂砾石筑坝技术进展及西部高寒高海拔地区应用展望[J].水利规划与设计,2012(5):32-36.
[2]CANNON R W.Concrete dam construction using earth compaction methods,1972[C].ASCE.
[3]郭诚谦.论混凝土面板堆石高坝的设计[J].水利学报,1993(6):17-23.
[4]方坤河,刘克传,段亚辉,等.推荐一种新坝型——面板超贫碾压混凝土重力坝[J].农田水利与小水电,1995(11):32-36.
[5]孙君森,林鸿镁.重力坝设计新思路[J].水利学报,2004(2):62-67.
[6]张亚梅,陈胜霞,陈波,等.掺橡胶粉混凝土的收缩、抗冻及抗渗性能:生态环境与混凝土技术国际学术研讨会[C].中国乌鲁木齐,2005.
[7]罗琦,黄少文,胡秀霞,等.橡胶粒子改性水泥混凝土的耐久性能[J].南昌大学学报(工科版),2007,29(4):340-343.
[8]石亮,吴烨,刘建忠.TORRENT法测试混凝土空气渗透性能研究[J].混凝土与水泥制品,2012(10):11-15.
[9]TORRENT R,DENARI魪E,JACOBS F,et al.Specification and site control of the permeability of the cover concrete:the swiss approach[J].Materials and Corrosion,2012,63(12):1127-1133.
[2]CANNON R W.Concrete dam construction using earth compaction methods,1972[C].ASCE.
[3]郭诚谦.论混凝土面板堆石高坝的设计[J].水利学报,1993(6):17-23.
[4]方坤河,刘克传,段亚辉,等.推荐一种新坝型——面板超贫碾压混凝土重力坝[J].农田水利与小水电,1995(11):32-36.
[5]孙君森,林鸿镁.重力坝设计新思路[J].水利学报,2004(2):62-67.
[6]张亚梅,陈胜霞,陈波,等.掺橡胶粉混凝土的收缩、抗冻及抗渗性能:生态环境与混凝土技术国际学术研讨会[C].中国乌鲁木齐,2005.
[7]罗琦,黄少文,胡秀霞,等.橡胶粒子改性水泥混凝土的耐久性能[J].南昌大学学报(工科版),2007,29(4):340-343.
[8]石亮,吴烨,刘建忠.TORRENT法测试混凝土空气渗透性能研究[J].混凝土与水泥制品,2012(10):11-15.
[9]TORRENT R,DENARI魪E,JACOBS F,et al.Specification and site control of the permeability of the cover concrete:the swiss approach[J].Materials and Corrosion,2012,63(12):1127-1133.