在硫酸盐干湿暴露下,一种新型的自我压缩的回收透混凝土
Xiancui Yan1, Zimo He1, Qun Xia1
1Department of Civil Engineering, Changzhou University, Changzhou 213164, China.
Materials (Basel, Switzerland)
|February 13, 2025
概括
具有人工通道的自压缩循环透混凝土 (SCRPC) 显示了提高的硫酸盐耐受性和透性. 它在硫酸环境中比硫酸性能更好,为透式混凝土应用提供更好的耐用性.
科学领域:
- 土木工程 土木工程是指土木工程.
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
背景情况:
- 传统的透水混凝土在平衡机械强度和透性方面面临着挑战.
- 为了解决这些局限性,开发了一种具有人工垂直和穿透通道的新型自压缩循环透水混凝土 (SCRPC).
研究的目的:
- 在各种干湿循环和硫酸盐暴露条件下研究SCRPC的硫酸盐耐受性和透性.
- 评估SCRPC在不同硫酸盐环境中的耐用性,特别是硫酸 (Na2SO4) 和硫酸 (MgSO4).
主要方法:
- 将SCRPC标本暴露在五种干湿模式中,其中包括Na2SO4和MgSO4溶液.
- 评估压力强度的损失,弹性相对动态模量,有效透度的变化,和透系数150个干湿周期后.
- 使用材料分析识别硫酸盐劣化产品.
主要成果:
- 在MgSO4溶液中浸泡时,SCRPC表现出最大的压力强度损失 (13.4%).
- 硫酸盐降解在Na2SO4溶液中干湿比较高时增加.
- 在硫酸盐攻击下,SCRPC的有效孔隙性显示出三阶段变化 (下降-增加-下降),与传统的透水混凝土不同.
- 透系数在6.00至6.82mm/s之间,表明持续的透性.
结论:
- 与传统的透水混凝土相比,SCRPC表现出优越的硫酸盐耐受性和透性.
- 对于具有Na2SO4暴露的环境而言,SCRPC比MgSO4更适合.
- 这些发现为在具有挑战性的环境中使用和增强带有人工通道的透水混凝土提供了必要的数据.
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