活性化固体废物材料与粉和废水集成的特性表征和微结构分析
Liang Li1, Xianhui Zhao2, Haoyu Wang1
1School of Civil Engineering, Tianjin Renai College, Tianjin, China.
PloS one
|January 3, 2025
概括
这项研究探讨了从工业废弃物的活性复合材料中使用粉颗粒和废水. 粉处理提高了强度,而废水改善了可持续建筑材料的抗收缩性和长期机械性能.
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.
- 环境科学 环境科学
背景情况:
- 建筑材料面临来自工业和农业固体废物的危险化学成分的生态危险.
- 生物资源和富含和的固体废物的可持续回收对于环保建筑至关重要.
研究的目的:
- 调查活性复合材料 (AAC) 中的粉颗粒 (SDP) 和粉废水 (SDW) 的利用情况.
- 检查SDP处理和SDW含量对AAC新鲜和硬化的特性的影响.
- 分析受SDW影响的微观结构和组成变化.
主要方法:
- 使用渣粉 (SP),红泥 (RM),飞灰 (FA) 和碳化渣 (CS) 的混合物制备AAC.
- 用NaOH溶液处理SDP,并将SDW纳入AAC矩阵.
- 评估新鲜性质 (电导率,流动性,密度) 和硬化性质 (弹性和压力强度,干燥收缩).
- 使用XRD,SEM-EDS和FTIR进行微结构和组成分析.
主要成果:
- 在12小时内用2.5mol/L NaOH处理SDP,降低了流动性和电导率,但增强了曲和压力强度.
- 将12.28%的SDW加入到NaOH溶液中,可以提高干燥收缩阻力和长期机械强度的发展.
- 由于在固化过程中有机酸盐的分解,添加SDW并没有改变产品成分.
结论:
- 在AAC中可以有效地利用SDP和SDW,为可持续的建筑材料开发做出贡献.
- 优化处理SDP和控制添加SDW可以提高AAC的机械性能和耐用性.
- 这项研究为生物资源和工业固体废物的协同回收提供了宝贵的见解.
更多相关视频
11:14Two-way Valorization of Blast Furnace Slag: Synthesis of Precipitated Calcium Carbonate and Zeolitic Heavy Metal Adsorbent
Published on: February 21, 2017
12.3K
07:34Evaluation of Integrated Anaerobic Digestion and Hydrothermal Carbonization for Bioenergy Production
Published on: June 15, 2014
25.4K
相关概念视频
Pozzolans
84
Pozzolans are siliceous or aluminous materials blended with Portland cement. They interact with the calcium hydroxide produced during the hydration of Portland cement and contribute to improved strength and durability of concrete. The pozzolanic activity, a measure of a pozzolan's effectiveness, is typically assessed using the strength activity index, as defined in ASTM C 618-93, which calculates the ratio of the compressive strength of cement mixtures with and without pozzolan.
Fly ash is...
Fly ash is...
84
Alkali Aggregate Reaction in Concrete
68
The alkali-aggregate reaction in concrete involves natural siliceous minerals in aggregates reacting with alkaline hydroxides derived from cement alkalis. This reaction forms an alkali-silica gel that absorbs water, swells, and increases in volume, which is confined by the surrounding cement paste, creating internal pressures that crack and disrupt the concrete. The extent of expansion and damage can be partly attributed to the alkali-silica reaction's osmotic hydraulic pressure and the...
68
