非传统混凝土混合物的协同静态和辐射屏蔽特性
Hazem K A Amin1, Moamen G El-Samrah2, Nabil H Amer1
1Civil Engineering Department, Military Technical College, Cairo, 11765, Egypt.
Scientific reports
|December 1, 2025
概括
这项研究开发了新的混凝土混合物,其中包括石,白素,鲁和马林,用于辐射屏蔽. 戈伊混凝土表现出良好的机械性能,而游玛林则增强了中子吸收,使这些材料成为辐射屏蔽应用的有希望的材料.
科学领域:
- 材料科学 材料科学 材料科学
- 核工程 核工程是指核工程.
- 应用物理 应用物理
背景情况:
- 混凝土对于核设施的辐射屏蔽和废物管理至关重要.
- 开发具有卓越屏蔽性能的先进混凝土对于安全性和效率至关重要.
研究的目的:
- 评估11种用于辐射屏蔽应用的混凝土混合物.
- 为了优化混凝土配方,使用戈提特,白素,鲁和马林.
- 评估机械和辐射屏蔽特性.
主要方法:
- 开发了11种混凝土混合物,包括对照混凝土 (NC),戈伊混凝土 (GC) 和含有白素 (GL),鲁素 (GR) 和马林 (GT) 粉末的混合物.
- 评估的机械性能 (压力强度).
- 通过实验和计算方法评估辐射屏蔽 (有效原子数,线性衰减系数,中子去除截面,热中子吸收).
主要成果:
- 戈伊混凝土保持了可接受的压力强度.
- 添加细粉一般会降低压力强度.
- 基于戈伊的混凝土 (GL30,GR30) 增强了马射线衰减.
- GL30和GT30显示了高速度中子去除截面.
- 图尔马林混合物 (GT20,GT30) 由于含量,表现出优异的总马射线衰减和热中子吸收.
结论:
- 混凝土中含有高达30%的白素或马林的戈伊石,适用于结构和辐射屏蔽.
- 这些新的混凝土提供了对马和中子辐射的增强保护.
- 该研究为设计辐射屏蔽混凝土结构提供了有价值的数据.
更多相关视频
相关概念视频
01:22Fiber Reinforced Concrete
312
Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...
312
01:29Additives and Fillers in Concrete
312
Additives and fillers are integral to enhancing the properties of concrete. Pozzolans and blast-furnace slag are additives or admixtures due to their reactions with calcium hydroxide released during cement hydration. Fillers, which are finely ground and similar in fineness to Portland cement, improve concrete attributes such as workability density, and reduce capillary bleeding or cracking. Some fillers possess hydraulic properties or participate in benign reactions within the cement paste.
The...
The...
312
01:22Waterproofing and Anti-Bacterial Admixtures in Concrete
216
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,...
216
01:28Effects of Air-entrainment in Concrete
356
Air entrainment in concrete significantly enhances the material's durability, especially in environments subjected to freeze-thaw cycles. Introducing small air bubbles into the concrete mix acts as internal voids that accommodate the expansion of water when it freezes, thereby alleviating internal stress and preventing structural cracks. This function is crucial in climates with significant freezing and thawing, as it protects the concrete from repeated stresses that could lead to premature...
356
01:16Dynamic Modulus of Elasticity of Concrete
917
The dynamic modulus of elasticity assesses how a concrete structure deforms under impact or dynamic loads. It is typically higher than the static modulus of elasticity, measured under slow, steady loading conditions.
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by a...
The sonic test is a common method to determine the dynamic modulus. In this test, a concrete beam, sized either 6 x 6 x 30 inches or 4 x 4 x 20 inches, is clamped at its center. Vibrations are initiated at one end of the beam by an electromagnetic exciter unit powered by a...
917
01:29Frost Resistant Concrete
354
Concrete's susceptibility to frost damage during freeze-thaw cycles demands strategic measures to enhance its frost resistance. Employing techniques like air entrainment, adjusting the water-cement ratio, proper curing, and selecting appropriate aggregates are essential.
Introducing microscopic air bubbles into the concrete mix through air entrainment creates small voids that accommodate ice expansion, thereby reducing internal pressures and preventing cracking. The optimal amount of...
Introducing microscopic air bubbles into the concrete mix through air entrainment creates small voids that accommodate ice expansion, thereby reducing internal pressures and preventing cracking. The optimal amount of...
354