用水泥材料填充的不和聚树脂:对填充剂加载对机械性能,微观结构和吸水能力的影响的全面研究
Salah M S Al-Mufti1, Asma Almontasser2, Syed J A Rizvi1
1Department of Petroleum Studies, Z. H. College of Engineering & Technology, Aligarh Muslim University, Aligarh 202002, India.
ACS omega
|June 19, 2023
概括
这项研究开发了使用各种填充剂的不和聚树脂 (UPR) /水泥材料复合材料. 通过特定的填充剂组合,可以获得最佳的机械性能,突出显示了填充剂特性对复合材料性能的影响.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物科学 聚合物科学
- 土木工程 土木工程是指土木工程.
背景情况:
- 混凝土材料 (CMs) 具有成本效益,在建筑中广泛使用.
- 开发新型复合材料提高了CM在工程中的应用范围.
研究的目的:
- 制造和表征不和聚树脂 (UPR) /水泥复合材料 (CPC).
- 评估使用不同填充剂的CPC的机械性能和吸水能力.
主要方法:
- 使用了五种填充剂:黑色水泥 (BC),白色水泥 (WC),巴黎石膏 (POP),沙子 (S) 和坑砂 (PS).
- 通过常规造,CPCs的料含量从10%到40%的重量%进行制备.
- 进行了机械测试 (拉力,曲,压力,冲击) 和吸水测试.
- 使用电子显微镜进行的微结构分析与机械性质相关的微结构.
主要成果:
- 对POP/UPR-10,WC/UPR-10,WC/UPR-40和POP/UPR-20分别观察到的拉力,曲,压力和冲击强度最高.
- UPR/BC复合材料的吸水率最高 (高达6.202%),而UPR/S复合材料的吸水率最低 (约1.8%).
- 复合材料的性能受到填料含量,颗粒大小,分布和填料-聚合物相互作用的影响.
结论:
- 开发的CPC显示了建筑应用的潜力.
- 填充剂的类型,含量和特性显著影响了基于UPR的复合材料的机械性能和吸水能力.
- 定制填充剂属性对于优化CPC性能至关重要.
相关概念视频
Additives and Fillers in Concrete
116
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...
116
Porosity in Cement Paste
183
The porosity of concrete is a measure of the void spaces within its structure. These spaces impact its strength and durability significantly. When water and cement interact, a chemical reaction called hydration creates a semi-solid paste. This paste includes combined water, making up approximately 23% of the cement's dry mass, and gel water, which fills minuscule voids known as gel pores, accounting for about 28% of the cement gel volume.
The balance of water to cement in the mix is...
The balance of water to cement in the mix is...
183
Superplasticizers
106
Superplasticizers are advanced admixtures that enhance the workability of concrete by lowering the water content without compromising the strength of the material. These substances are highly effective water reducers, improving concrete flow, making it easier to work with, and enabling concrete to reach inaccessible areas or densely reinforced sections without mechanical vibration. The key components in superplasticizers are either sulfonated melamine or naphthalene formaldehyde condensates,...
106
Fiber Reinforced Concrete
108
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...
108
Pore Size Distribution
174
In concrete, the pore size distribution significantly influences the material's properties. Capillary pores, markedly larger than gel pores, form a vast network within partially hydrated cement paste, reducing the concrete's strength and increasing its permeability. This heightened permeability leads to a greater risk of damage from environmental factors like freeze-thaw cycles and chemical attacks, with the extent of vulnerability also being tied to the water-to-cement ratio.
Adequate...
Adequate...
174
Plasticizers
91
Water-reducers, or plasticizers, are chemical admixtures used in concrete to improve strength and workability. These additives reduce the water-cement ratio without compromising workability, lower the cement content while maintaining the same workability, or increase workability to assist concrete placement in inaccessible areas.
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
Plasticizers function by using surface-active agents to create repulsive electrostatic forces between cement particles. This dispersion enhances the concrete's...
91


