超吸收聚合物 (SAP) 尺寸对混凝土微观结构和压力强度的影响
Xiaobo Niu1, Yile Zhang1, Yogarajah Elakneswaran1
1Division of Sustainable Resources Engineering, Faculty of Engineering, Hokkaido University, Sapporo 060-8628, Japan.
Polymers
|January 23, 2024
概括
超吸收性聚合物 (SAP) 通过促进早期水化和减少小孔隙来增强水泥材料. SAP的大小影响了水化范围和孔隙性,更大的SAP提高了混凝土的强度.
科学领域:
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
- 聚合物科学 聚合物科学
背景情况:
- 超吸收聚合物 (SAP) 是水友网络,有可能修改水泥材料.
- 了解SAP特征的影响,比如大小,对于优化其应用至关重要.
研究的目的:
- 调查超吸收聚合物 (SAP) 尺寸对水泥和混凝土性能的影响.
- 在各种条件下分析对水合度,多孔度和压力强度的影响.
主要方法:
- 在水泥混合物中SAP尺寸的系统变化.
- 评估水合度,孔隙结构和压力强度随着时间的推移和不同的固化条件.
主要成果:
- 添加SAP促进了C2S水合,特别是在早期,随着SAP大小的增加,有效性会下降.
- 在小孔 (4 nm-10 μm) 中,SAPs可降低孔隙性;200 μm和400 μm的SAPs最有效.
- 虽然较大的SAPs在较大的毛孔 (>10微米) 中增加了平均毛孔度,但总毛孔度降低了,特别是400微米SAP.
- 水泥糊的压力强度略有下降,但混凝土强度随着SAP的添加显著增加,特别是400微米SAP.
结论:
- SAP的大小极大地影响水分,孔隙性和硬度的发展在水泥材料.
- 优化的SAP尺寸 (例如400微米) 可以通过改善水分和减少有害的多孔性来提高混凝土的性能.
- SAP应用程序为改善混凝土的耐用性和强度提供了一个可行的策略.
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