添加丙烯酸鋅對於水泥漿防水性能及早期強度的增強效果

Zinc Di-acrylate (ZDA) as Additive to Enhance Water-proofing and Early Strength Properties for Cement Mortar

混凝土在水化凝固之後會產生裂縫，以外部添加之材料對裂縫表面有較好的粘接力，一直是重要研究方向。本文探討新型橡膠硫化劑“丙烯酸鋅＂作為水泥漿之防水及早強添加劑之可行性。使用之丙烯酸鋅為國內自產產品，結果發現摻量 0.3%時， 七天養護期之抗壓強度提升 11.9%，但流度不變；添加 0.8wt%丙烯酸鋅後的混凝土， 吸水率比沒有添加低 32%。在新拌性質方面，流度維持在 22(±1)cm，坍度從 27cm 增 加至 32cm，顯示添加丙烯酸鋅後，仍維持既有的良好工作度（自流及搗實），有利於 現場施工作業。

Cracks occur after solidification of cement mortar, this phenomena can be addressed by additives. This paper aims to study the proper enhancement for the waterproofing and early strength of cement mortar by the addition of zinc diacrylate. Results found that the strength increased 11.9% of 7-day aged cement concrete at the adding ratio of 0.3%; while the waterproofing property increases 32% at the adding ratio of 0.8%.The flow property is kept at 22cm, the collapse property is increased from 27cm to 32cm. These findings illustrate that the addition of zinc diacrylate can increase the working ability.