Yu Fengxian, Qin Langtian, Han Deqiang, Huang Feng
Zhongke Jiantong Engineering Technology Co., Ltd., Beijing 101399, China.
School of Engineering and Technology, China University of Geosciences Beijing, Beijing 100083, China.
Polymers (Basel). 2025 Mar 20;17(6):827. doi: 10.3390/polym17060827.
Traditional acrylate grouting materials often suffer from mechanical performance degradation and interfacial bonding failure under long-term water immersion, significantly limiting their application in pressurized water environments. This study proposes a composite crosslinking synergistic strategy to address these challenges. By constructing a dual-network structure through polyethylene glycol diacrylate (PEG500DA) and a monofunctional crosslinker (PEG-MA), and systematically optimizing the material formulation by regulating the triethanolamine content to control gelation time, the mechanical and hydraulic stability of the material was significantly enhanced. Increasing the acrylate concentration to 35% achieved an optimal balance between a slurry viscosity (8.3 mPa·s) and mechanical performance, with tensile strength reaching 76 kPa and the compressive strength of the sand-solidified body measuring 440 kPa. At a PEG500DA/PEG-MA ratio of 2:3, the material exhibited both high tensile strength (78 kPa) and exceptional ductility (elongation at break > 407%), with a compressive strength of 336 kPa for the sand-solidified body. When the total crosslinker content exceeded 5%, the 28-day water absorption and volume expansion rates were effectively reduced to 12% and 11%, respectively. Under simulated pressurized water conditions, the modified material demonstrated a water-pressure resistance of 300 kPa after 1 day, stabilizing at 350 kPa after 56 days-a 75% improvement over commercial products. This study provides an innovative solution for long-term anti-seepage applications in complex hydrogeological environments, offering significant advancements in material design and engineering reliability.
传统的丙烯酸酯灌浆材料在长期水浸条件下往往会出现机械性能退化和界面粘结失效的问题，这极大地限制了它们在压力水环境中的应用。本研究提出了一种复合交联协同策略来应对这些挑战。通过聚乙二醇二丙烯酸酯（PEG500DA）和单官能团交联剂（PEG-MA）构建双网络结构，并通过调节三乙醇胺含量来系统优化材料配方以控制凝胶时间，材料的机械和水力稳定性得到了显著提高。将丙烯酸酯浓度提高到35%，在浆液粘度（8.3 mPa·s）和机械性能之间实现了最佳平衡，拉伸强度达到76 kPa，砂固化体的抗压强度为440 kPa。在PEG500DA/PEG-MA比例为2:3时，材料表现出高拉伸强度（78 kPa）和出色的延展性（断裂伸长率>407%），砂固化体的抗压强度为336 kPa。当总交联剂含量超过5%时，28天的吸水率和体积膨胀率分别有效降低到12%和11%。在模拟压力水条件下，改性材料在1天后表现出300 kPa的耐水压性，56天后稳定在350 kPa，比商业产品提高了75%。本研究为复杂水文地质环境中的长期防渗应用提供了一种创新解决方案，在材料设计和工程可靠性方面取得了重大进展。
