超塑化剂化学结构对反应性粉末混凝土性能的影响
Stefania Grzeszczyk1, Aneta Matuszek-Chmurowska1, Natalina Makieieva2
1Faculty of Civil Engineering and Architecture, Opole University of Technology, 48, Katowicka Street, 45-061 Opole, Poland.
Materials (Basel, Switzerland)
|April 24, 2025
概括
优化反应性粉末混凝土 (RPC) 涉及选择含有更多碳酸盐组的聚碳酸盐超塑化剂 (SP),以获得更好的流动性和强度. 调整混合程序也可以提高RPC的性能,而不会影响水泥的水化.
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.
- 化学工程是化学工程的重要组成部分.
背景情况:
- 在反应性粉末混凝土 (RPC) 中实现足够的流动性是具有挑战性的,因为水/粘合剂比率低.
- 聚碳酸超塑剂 (SPs) 和修改的混合程序为改善RPC可操作性提供了潜在的解决方案.
研究的目的:
- 研究两种不同的聚碳酸超塑剂 (SP) 和混合工艺对反应性粉末混凝土 (RPC) 新鲜和硬化的性能的影响.
- 阐明SP化学结构在影响RPC混合物特性和性能方面的作用.
主要方法:
- 系统的实验研究,包括物理化学和光谱测试.
- 分子建模以了解超级可塑剂-粒子相互作用.
- 三阶段与四阶段混合程序的比较分析.
主要成果:
- 含有高密度碳酸盐组 (-COO-Me+) 的超级可塑剂增强了RPC混合物的流动性和脱气性.
- 改善的流动性和脱空与降低的孔隙性和加大硬化RPC的压力强度相关.
- 从三阶段到四阶段的混合程序的过渡提高了RPC混合的流动性和强度.
- 无论是SP的化学结构还是混合程序都没有显著改变水泥水化率.
结论:
- 聚碳酸超塑剂的化学结构对于优化反应性粉末混凝土的流动性,脱气和机械性能至关重要.
- 修改混合序列为提高RPC性能提供了一个有效的策略.
- 这些发现为基础材料科学和建筑中水泥复合材料的实际设计提供了宝贵的见解.
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