| 摘要: |
| 针对碾压砼坝上游面的防渗，提出了湿法喷涂丙乳砂浆集中防渗的新方案。增设了喷粉辅助机械系统，改进了辅料系统及喷枪结构。改进后的湿喷工艺能缓解稠浆易增，稀浆易淌的缺陷。并已成功地应用于福建省山仔碾压砼坝上游面的防渗等工程。 |
| 关键词: 碾压砼坝,湿喷,丙乳砂浆,工艺改进 |
| DOI： |
| 分类号:TV64 |
| 基金项目:“八五”国家重点科技攻关项目 |
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| Improvement of shotcreting technique for anti-seepage coating of roller compacted concrete dam |
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Cai Yuebo, Lin Baoyu, Shang Guoliang
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Nanjing Hydraulic Research Institute
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| Abstract: |
| A new method for anti - seepage coating of roller compacted concrete dam by using wet - mix shotcreting polyacrylate emulsion cement mortar(PAE mortar) is presented in this paper. A series of experiments are carried out for improving wet - mix shotcrete from technology and facilities to mixture of mortar. A fume - spray machine system is designed, the delivery system and the structure of spray gun are improved. The shortcoming on pipe - blocking by thick mortar and flow away of thin fluidity mortar from substrate is mitigated significantly. The improved shotcrete technique had been successfully applied in anti - seepage coating of Shanzai roller compacted concrete dam etc. |
| Key words: roller compacted concrete dam, wet-mix shotcrete, polyacrylate emulsion mortar, technological improvement |
