化产品的阶段演变和砂强度的发展在活性废渣和飞灰系统
Zhuo Jin1, Aimin Gong1, Yier Huang1
1College of Water Conservancy, Yunnan Agricultural University, Kunming, China.
PloS one
|December 4, 2025
概括
活性地质聚合物材料为波特兰水泥提供了一个可持续的替代品. 这项研究优化了激活剂类型 (NaOH用于渣,Ca(OH) 2用于飞灰) 和剂量,显著提高了机械性能,并证明了定制材料的性能.
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.
- 可持续建筑 可持续建筑
背景情况:
- 活性地质聚合物材料,利用工业副产品如飞灰和渣,为建筑中的波特兰水泥提供了一个环保的替代品.
- 这些材料正在被探索用于诸如防漏接,道路建设和高强度混凝土生产等应用.
研究的目的:
- 系统地研究由氧化 (NaOH) 和氧化 (Ca(OH) 激活的渣和飞灰的水化行为和机械特性2).
- 为了确定最佳的激活器类型和剂量,以实现所需的设置时间和增强材料性能.
- 为开发可持续的活性地质聚合物材料提供理论见解和技术指导.
主要方法:
- 研究了使用NaOH和Ca(OH) 2的4%,6%和8%剂量的渣和飞灰的水化,确保设置时间在45到600分钟之间.
- 通过在3,7和28天进行标准化强度测试,评估了由此产生的砂系统的机械性能.
- 使用SEM,XRD,FTIR,BSE-IA和异热热量计来分析水化动力学和产品演变的相位组成和微观结构.
主要成果:
- NaOH在废渣激活方面更有效,而Ca (OH) 2则在飞方面表现出色.
- 的最佳剂量为8%的NaOH,飞的最佳剂量为6%的Ca (OH) 2,从而提高了反应的完整性,更密集的微观结构和优异的机械性能.
- 与基于飞灰的砂 (分别为6.65 MPa和1.92 MPa) 相比,用活性焦渣的砂达到显著更高的28天压力强度 (35.94 MPa) 和屈曲强度 (10.23 MPa).
结论:
- 性激活剂的类型和剂量极大地影响了性激活地质聚合物材料的特性.
- 激活器的战略选择允许有效地为特定的建筑应用量身定制材料性能.
- 这项研究为开发和应用可持续地质聚合物建筑材料提供了有价值的数据.
相关概念视频
Strength and Heat of Hydration
626
The hydration of cement is an exothermic reaction in which heat is generated as cement hydrates. This heat of hydration is critical to cement's strength development. The rate at which this heat is generated affects the temperature rise, with a majority of the heat being released early in the hydration process, half within the first three days, and about 75% within the first week.
The heat of hydration for each cement compound is significant; for instance, tricalcium aluminate (C3A) and...
The heat of hydration for each cement compound is significant; for instance, tricalcium aluminate (C3A) and...
626
Pozzolans
453
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...
453
Hydration of Cement
769
Hydration of cement is a chemical reaction between cement particles and water. This process occurs primarily through two mechanisms: through-solution and topochemical. In the through-solution process, anhydrous compounds dissolve into their constituents, hydrates form in the solution, and then precipitate from the supersaturated solution. The topochemical process involves solid-state reactions at the cement particle surface. The through-solution process dominates the topochemical process at the...
769
Mortar Properties
399
Mortar properties encompass a range of characteristics crucial for construction and masonry work, including workability, water retention, bond strength, durability, compressive strength, volume change, and appearance. Workability refers to mortar's ability to be easily applied and manipulated without sagging or falling off surfaces, which is important for efficient masonry unit placement and alignment. Water retention is essential to prevent the mortar from losing moisture too quickly to...
399
Alkali Aggregate Reaction in Concrete
451
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...
451
Mortar
546
Mortar, a mixture of Portland cement, hydrated lime, sand, and water, is a crucial binding material in construction. Its primary function is to join masonry units together, filling gaps and ensuring a uniform distribution of weight across the structure. This helps in preventing potential weaknesses. Mortar also serves as a protective barrier against environmental elements such as water and wind, thereby safeguarding the interior of the structure. It also compensates for surface irregularities...
546


