通过性热水活性从护泥中开发接材料:一种资源利用方法
Lianjun Chen1,2, Meiyue Liu1, Penghui Li1
1College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
Materials (Basel, Switzerland)
|June 27, 2025
概括
这项研究使用地质聚合物化将护污泥转化为有价值的同步接材料. 最佳的比例产生高强度地质聚合物,促进可持续的资源利用和减少土地浪费.
科学领域:
- 地质技术工程 地质技术工程
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
背景情况:
- 道运营会产生含水量高和聚合物的粘性屏蔽污泥,不适合直接使用,并导致土地浪费.
- 目前的护污泥处置方法不经济且效率低下,需要可持续的解决方案.
- 护污泥的资源利用对于减少环境影响和保护土壤资产至关重要.
研究的目的:
- 开发有效和经济的同步接材料,从护污泥.
- 调查使用防护污泥和磨砂颗粒高炉污泥 (GGBS) 进行地质聚合的可行性.
- 为了确定屏蔽污泥基同步接的最佳材料比率,并评估其性能.
主要方法:
- 屏蔽污泥和沙子被用作同步接的原材料,将GGBS和氧化作为激活剂.
- 进行了实验室测试,分析料配方的流动性,水分泌率,定时间和不受限制的压力强度 (UCS).
- 组件地质聚合物使用活性盾污泥与水作为唯一的激活剂来制备,以评估长期强度.
主要成果:
- 基于性能指标确定了基于屏蔽污泥的同步接的最佳材料比率.
- 活性盾污泥的地质聚合,含有60%重量%的污泥和水激活,实现了28天的压力强度为51.08MPa.
- 开发的材料在同步接应用中显示出有前途的性能.
结论:
- 屏蔽污泥可以有效地被用作基于地质聚合物的同步接材料的主要组成部分.
- 地质聚合过程提供了一种经济和环保的方法,用于屏蔽污泥的价值化.
- 这项研究为道项目中护污泥的可持续资源管理提供了宝贵的参考.
相关概念视频
Alkali Aggregate Reaction in Concrete
192
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...
192
Hydration of Cement
398
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...
398
Strength and Heat of Hydration
359
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...
359
Waterproofing and Anti-Bacterial Admixtures in Concrete
114
Concrete's susceptibility to water absorption is due to the capillary action within the pores of its hydrated cement paste. This action draws water in, creating the need for waterproofing admixtures to prevent such penetration. The efficacy of these admixtures is contingent upon the water pressure, with variations arising from different conditions such as rain, capillary rise, or hydrostatic pressure in structures intended to hold water.
Waterproofing admixtures render concrete hydrophobic,...
Waterproofing admixtures render concrete hydrophobic,...
114
Pozzolans
202
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...
202


