摘要
凝胶时间的合理控制可提高化学注浆效果,减少浆液浪费.本文主要研究不同配比对于凝胶时间、终凝时间及单轴抗压强度的影响.结果表明,当草酸含量在1.45%~29.86%时,静止条件下,改性脲醛树脂浆液凝胶时间介于53 s^1 h,终凝时间介于7 min^3 h,且凝胶时间、终凝时间随着草酸含量的增加呈递减趋势.凝固后的注浆体打磨成规格为直径×长度=45 mm×100 mm的试件,然后在RYL-600剪切流变仪上测试不同配比下的单轴抗压强度.结果显示草酸含量越高时,注浆体试件在低应力下发生的形变越大,试件的单轴抗压强度随着草酸含量的增加而减小,介于3.23~25.16 MPa之间.
Reasonable controls on the gel time can not only improve the effect of chemical grouting,but also reduce slurry waste. The study of the influence of different ratios on the gel time,the final setting time and the strength have been done. Results show that when the content of oxalic acid between 1. 45% and 29. 86%,under the static condition,the gel time and the final setting time of modified UF resin slurry lies between 53 s ~ 1 h and7 min ~ 3 h. The gel time and the final setting time show a decreasing trend with oxalic acid content increasing.The grouts are polished into the specimen with diameter × length = 45 mm × 100 mm after curd. Then,this paper tests the uniaxial compressive strength of different ratio specimens on the RYL- 600 shear rheometer.Results show that the higher the content of oxalic acid is,the greater the deformation of the grout specimen is under low stress. Furthermore,the uniaxial compressive strength will decrease when the oxalic acid content increases,and it lies between 3. 23 MPa and 25. 16 MPa.
出处
《矿业工程研究》
2015年第3期5-8,共4页
Mineral Engineering Research
基金
国家自然科学基金资助项目(51274097
51434006)
湖南科技大学研究生创新基金资助项目(S140002)
关键词
改性脲醛树脂
草酸
配比
凝胶时间
单轴压缩
modified UF resin
Oxalic acid
ratio
gel time
uniaxial compression