原位合成高吸水性树脂处理砂浆微裂缝渗漏研究

依据高吸水性树脂遇水膨胀、无水复原的性能特点,提出在混凝土(砂浆)裂缝或孔隙处原位合成高吸水性树脂,用“以水治水”的技术思路解决建筑物渗漏问题。对原位合成高吸水性树脂在不同pH值和温度条件下的吸水性能,不同裂缝宽度和不同孔隙率砂浆试件的抗渗性能进行了研究。结果表明,用原位合成高吸水性树脂处理0.2～2.0mm宽的砂浆裂缝,其渗透压力达到0.2～0.5MPa;处理灰砂比1∶3～1∶4.5砂浆试件,其抗渗压力比为200%～250%。

The super-absorbent resin （SAR） has the characteristics of swelling meeting water and restoring losing water. The paper presents an idea of disposing construction leakage by synthesizing SAR in situ of the cracks or pores of concrete （sand mortar）. The following contents are systematically studied： the water absorption of SAR synthesized in situ under different pH value and temperatures, the impermeability of sand mortar with various width of cracks and different pore ratio. The results show： using SAR synthesized in situ to dispose the sand mortar with cracks of 0.2-2.0mm width has 0.2-0.SMPa impermeability pressure; to dispose sand mortar with 1：3-1：4.5 cement-sand ratio has 200%-250% impermeability pressure ratio.