相关实验视频
Updated: May 15, 2025

09:31
Calcium Carbonate Formation in the Presence of Biopolymeric Additives
Published on: May 14, 2019
16.7K
一项关于石膏和Ca (OH) 2对多元件固体废物基础水化材料机械性能和水化行为的影响的研究
Jiansheng Gou1,2, Shuangxi Li1,2, Chunmeng Jiang1,2
1College of Hydraulic and Civil Engineering, Xinjiang Agricultural University, Urumqi 830052, China.
Materials (Basel, Switzerland)
|May 14, 2025
概括
石膏和氧化改善固体废弃物水泥材料. 这些添加剂增强了早期的强度,并稳定了水化产品,以更好地利用资源.
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.
- 地质化学 地质化学
背景情况:
- 固体废物在水泥材料中的利用带来了环境和经济上的好处.
- 了解水化和机械性能对于开发可持续建筑材料至关重要.
- 石膏 (CaSO4·2H2O) 和氧化 (Ca(OH) 2) 是影响水泥水化的常见添加剂.
研究的目的:
- 为了研究石膏和氧化对固体废物基础上的水化和机械性质的质材料的影响.
- 阐明这些添加剂在水化产品的形成和稳定中的作用.
- 为优化固体废物在水泥应用中的使用提供指导.
主要方法:
- 在各种剂量下进行压力强度测试.
- 使用X射线衍射 (XRD) 进行先进的材料表征.
- 富里埃变换红外光谱学 (FTIR),热重力测量-微分热重力测量分析 (TG-DTG) 和扫描电子显微镜 (SEM).
主要成果:
- 石膏的添加促进了化石 (AFt) 的形成.
- 氧化增强性,有助于酸水合物 (C-S-H) 凝沉.
- 石膏和Ca ((OH) 2的平衡组合显著增加了早期的压力强度,并稳定了水化产品.
结论:
- 石膏和氧化协同作用,改善基于固体废物的水泥材料的性能.
- 优化的添加剂剂量可以提高早期强度的发展和产品的稳定性.
- 这项研究支持将固体废物有效利用为可持续建筑材料.
相关概念视频
Hydration of Cement
171
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...
171
Factors Affecting Solubility
32.9K
Compared with pure water, the solubility of an ionic compound is less in aqueous solutions containing a common ion (one also produced by dissolution of the ionic compound). This is an example of a phenomenon known as the common ion effect, which is a consequence of the law of mass action that may be explained using Le Chȃtelier’s principle. Consider the dissolution of silver iodide:
32.9K
Sulfate Attack on Concrete
99
Sulfate attack on concrete is a deterioration process characterized by a whitish discoloration beginning at the edges and corners, accompanied by cracking and spalling. This phenomenon occurs when sulfates react with the components of hardened concrete, forming compounds like calcium sulfate and calcium sulfoaluminate which occupy more space than the substances they replace, causing the concrete to expand and disrupt.
Sulfates from sources like soil, groundwater, or industrial effluents...
Sulfates from sources like soil, groundwater, or industrial effluents...
99
Strength and Heat of Hydration
191
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...
191
Soundness of Cement
126
The soundness of cement refers to the ability of cement paste to retain its volume after setting. Unsound cement can lead to expansion and structural damage due to the presence of free lime, magnesia, and calcium sulfate. Free lime hydrates very slowly, expanding and causing unsoundness, which is difficult to detect because it intercrystallizes with other compounds. Magnesia also reacts with water, forming crystals that can disrupt the cement's structure. Calcium sulfate can create...
126
Effect of Sea Water on Concrete
118
Concrete exposed to seawater can undergo degradation like the dissolution of ettringite and gypsum, increasing the material's porosity and decreasing its strength. In contrast, the crystallization of salts within the concrete's pores can cause expansion, particularly above the waterline where evaporation occurs. Nonetheless, this expansion only happens when seawater, enabled by the concrete's permeability, manages to infiltrate the structure.
Concrete in areas between tide marks,...
Concrete in areas between tide marks,...
118

