| 摘要: |
| 【目的】探讨超吸水聚合物（SAP）对混凝土坍落度、抗压强度、抗渗性、抗冻融性及耐久性的影响。【方法】采用坍落度试验、抗压强度试验及渗透试验，在混凝土中分别掺入相对水泥含量0.4%，0.3%，0.2%，0.1%，0% SAP，测定混凝土的坍落度，养护7和28 d抗压强度、抗冻融性以及养护28 d抗渗性。【结果】随着SAP含量的增大，混凝土的坍落度减小；当SAP含量为0.2%时，养护7 d混凝土的抗压强度最高，养护28 d混凝土抗渗性和抗冻融性均最强；当SAP含量高于0.2%时，随着SAP含量的继续增加，混凝土抗压强度、抗渗性和抗冻融性均减小。【结论】掺入SAP可以使混凝土的早期开裂及收缩减小，当其含量达0.2%时，混凝土的抗渗透性尤其是冻融状态下的抗渗透性能够得到明显改善和提高，同时在一定程度上增强了混凝土的耐久性。 |
| 关键词: 超吸水聚合物 混凝土 抗渗性 抗冻融性 耐久性 |
| DOI： |
| 分类号: |
| 基金项目:江苏无锡市建设局科研项目 |
|
| Effect of super absorbent polymers on concrete in the respects of permeability and durability |
|
|
| Abstract: |
| 【Objective】The influence of super absorbent polymers on slump,compressive strength,anti-water-seeping,anti-freeze-thaw and durability of the concrete were studied.【Method】Through mechanical tests the following studies were performed:the respects of Slump,compressive strength,anti-water-seeping and anti-freeze-thaw-indexes were determinded for characteristics of Slump,compressive strength for 7 and 28 days,anti-water-seeping and anti-freeze-thaw for 28 days of the concrete.In the cement content the percentage of addition of SAP was up to 0.4%,0.3%,0.2%,0.1%,0%.【Result】Slump of the concrete decreased with the increase of super absorbent polymers content.The compressive strength of concrete for 7 days,anti-water-seeping and anti-freeze-thaw for 28 days of the concrete were the highest with the SAP concentration at 0.2%.Anti-water-seeping and anti-freeze-thaw of concrete increased with the increase super absorbent polymers content after coming to 0.2%,and then it decreased rapidly with the increase of super absorbent polymers content.【Conclusion】Super absorbent polymers can effectively decrease the early age cracking and shrinkage of concrete,mass percentages of super absorbent polymers content was 0.2% for the incorporation of the best.Anti-water-seeping,especially anti-water-seeping of concrete can be improved and increased under freeze thaw,at the same time durability of the concrete was strengthened to a certain extent. |
| Key words: super absorbent polymer concrete anti-water-seeping anti-freeze-thaw durability |
