Fabrication of high-performance acrylate grouting materials from tailor made magnesium acrylate solutions,Journal of Applied Polymer Science

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Fabrication of high-performance acrylate grouting materials from tailor made magnesium acrylate solutions
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2024-03-09 , DOI: 10.1002/app.55405
Daidong Wei _{1,

2,

3,

4} , Kaipeng Zhu _{1,

2,

5} , Huizhi Li _{3,

4} , Juanjuan Zeng _{3,

4} , Shiqiang Li _{3,

4} , Wei Xue _{3,

4}

Affiliation

Acrylate grouting (AG) material is a low-viscosity aqueous solution capable of forming an elastic water-plugging gel after being injected into seepage cracks. This study highlights the fabrication and performance of AG materials, specifically emphasizing the use of magnesium acrylate (MgDA) as the principal precursor for the polymer gel network. Additionally, 2-(dimethylamino)ethyl methacrylate (DMAEMA) serves as a bifunction crosslinker and accelerator, while sodium persulfate and potassium ferricyanide act as initiator and retarder, respectively. AG materials are made of these four key ingredients mixed in an aqueous solution, and then polymerized into a highly elastic water-plugging gel. Our systematic investigation indicated that the MgDA and DMAEMA concentrations significantly influence the performance of the AG material. The optimized AG material formulation containing 24% MgDA and 1.4% DMAEMA, exhibited an elongation at break of 1040%, a water absorption of 67% and a compressive strength of 363 kPa in grouted sand. The gel time could be adjusted from under 20 s to more than 20 min, offering versatility to meet various application requirements. Beyond its good bonding performance and superior extrusion resistance, the AG materials displayed excellent water-plugging effect. Impressively, even after extending the closed water test to 360 days, the gel displayed no significant change in color or signs of degradation, and the treated crack remained in a deep dry state with no evidence of leakage, confirming the AG material's superior durability. With its advantageous permeability and excellent water-plugging effect, the AG material is well-suited for applications in micro-crack sealing, seepage prevention and stratum reinforcement grouting.

中文翻译：

用定制的丙烯酸镁溶液制造高性能丙烯酸酯灌浆材料

丙烯酸酯灌浆料（AG）是一种低粘度水溶液，注入渗漏裂缝后可形成弹性堵水凝胶。这项研究重点介绍了 AG 材料的制造和性能，特别强调使用丙烯酸镁 (MgDA) 作为聚合物凝胶网络的主要前体。此外，甲基丙烯酸 2-(二甲氨基)乙酯 (DMAEMA) 充当双功能交联剂和促进剂，而过硫酸钠和铁氰化钾分别充当引发剂和缓凝剂。 AG材料是将这四种关键成分混合在水溶液中，然后聚合成高弹性的堵水凝胶。我们的系统调查表明 MgDA 和 DMAEMA 浓度显着影响 AG 材料的性能。优化后的AG材料配方含有24% MgDA和1.4% DMAEMA，在灌浆砂中的断裂伸长率为1040%，吸水率为67%，抗压强度为363 kPa。凝胶时间可从 20 秒以下到 20 分钟以上调节，提供多功能性以满足各种应用要求。 AG材料除了具有良好的粘结性能和优异的抗挤压性能外，还表现出优异的堵水效果。令人印象深刻的是，即使将闭水测试延长至360天，凝胶也没有出现明显的颜色变化或降解迹象，并且处理后的裂缝仍处于深度干燥状态，没有泄漏的迹象，证实了AG材料的卓越耐用性。 AG材料具有优越的渗透性和优异的堵水效果，非常适合微裂缝封堵、防渗、地层加固灌浆等应用。

更新日期：2024-03-09

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