班托尼特缓冲材料在100°C以上的液压性能
Seok Yoon1, Jun-Seo Jeon2, Gi-Jun Lee1
1Disposal Safety Evaluation Research Division, Korea Atomic Energy Research Institute (KAERI), Daejeon, 34057, Republic of Korea.
Heliyon
|August 14, 2023
概括
增加本托尼特缓冲材料的温度超过100°C,减少吸收,增加液压导电性,这对于放射性废物处理系统至关重要. 本研究评估了用于增强工程屏障系统的这些热液压特性.
科学领域:
- 地质技术工程 地质技术工程
- 核工程 核工程是指核工程.
- 材料科学 材料科学 材料科学
背景情况:
- 石对于工程屏障系统在高水平放射性废物处理中至关重要.
- 当前的设计温度 (<100°C) 限制了处置效率;更高的温度需要评估热-液压-机械性能.
- 缓冲材料温度的提高可以减少必要的处置面积.
研究的目的:
- 为了评估高温 (>100°C) 基昂朱 (KJ) 托尼特缓冲材料的液压性能.
- 研究温度对土壤-水特性曲线 (SWCC) 和液压导电性的影响.
- 评估范-格努特SWCC模型在高温下适用的情况.
主要方法:
- 制造了一种实验系统,用于测量100°C以上的吸收和和液压导电性.
- 在25-149°C时测量KJ托尼特的相对湿度,初始含水量有所变化 (0, 0.06, 0.12).
- 从25°C-149°C的实验数据中推导出Van-Genuchten SWCC的适配参数.
主要成果:
- 吸收随着温度的增加而减少 (从99°C-149°C降低10%-25%).
- 修改后的Van-Genuchten SWCC模型在测试温度范围内显示出适用性.
- 由于分子运动和结构变化,液压导电性在100°C以上的温度下非线性增加.
结论:
- 升高的温度显著影响本托尼特的液压性能,减少吸收和增加液压导电性.
- 调查结果支持在放射性废物处理中增加本托尼特缓冲材料的目标温度.
- 该研究验证了修改后的Van-Genuchten模型,用于预测高温下的SWCC.
更多相关视频
09:46Protocol for Measuring the Thermal Properties of a Supercooled Synthetic Sand-water-gas-methane Hydrate Sample
Published on: March 21, 2016
8.9K
10:52Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System
Published on: August 7, 2018
8.6K
相关概念视频
Strength and Heat of Hydration
274
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...
274
Diversity of Archaea IV
51
Hyperthermophilic archaea are a group of extremophiles thriving at temperatures above 80°C, often in hydrothermal vents and volcanic soils where conditions surpass the boiling point of water. At such temperatures, proteins, membranes, and DNA in most organisms degrade, but hyperthermophiles have evolved remarkable adaptations to maintain stability and function.Unique Cellular FeaturesHyperthermophilic membranes are composed of a monolayer of biphytanyl tetraether lipids, which resist...
51
Hydration of Cement
285
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...
285
Masonry in Cold and Hot Weather Conditions
107
In cold weather, masonry construction requires specific precautions to ensure mortar does not freeze before curing, as this can significantly weaken its strength and watertightness. Mortar temperature should be maintained between 60°F and 80°F to support proper hydration and curing. Below 40°F, mortar water must be heated, but should not exceed 120°F as high temperatures can reduce mortar's compressive and bond strength.
Other key practices include keeping masonry units...
Other key practices include keeping masonry units...
107
Hot Weather Concreting
91
Concreting at elevated temperatures accelerates the hydration process, leading to quicker setting but potentially reducing the long-term strength of the concrete structure. Additionally, low air humidity fosters rapid moisture loss from the concrete, resulting in reduced workability, pronounced plastic shrinkage, and a higher likelihood of crazing.
Mitigating the heat increase in concrete can be economically achieved by shading aggregate stockpiles to prevent heating from solar radiation,...
Mitigating the heat increase in concrete can be economically achieved by shading aggregate stockpiles to prevent heating from solar radiation,...
91
Specific Heat
62.2K
The specific heat capacity of a substance refers to the energy required to increase the temperature of one gram of that substance by one degree Celcius. Specific heat capacity is often represented in calories (cal), grams (g), and degrees Celsius (oC), but can also be expressed in joules (J), kilograms (kg), and Kelvin (K), among other units.
For example, increasing the temperature of one gram of water by 1°C requires one calorie of heat energy and can be written as 1 cal/g-°C, or...
For example, increasing the temperature of one gram of water by 1°C requires one calorie of heat energy and can be written as 1 cal/g-°C, or...
62.2K
