制造绿色抗微生物和抗静电水泥建筑
Abeer Reffaee1, Mona Saied2, Shimaa Farag Hamieda2
1Microwave Physics and Dielectrics Department, National Research Centre, Cairo, Egypt. abeer_reffaee@yahoo.com.
Scientific reports
|March 16, 2024
概括
这项研究发现,在水泥混合物中用废弃的聚乙烯 (WPVC) 取代高达30%的细聚合物可以提高机械强度,介电性质和抗菌活性. 抗静电水泥糊应用的最佳比率是30%的WPVC.
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.
- 聚合物科学 聚合物科学
背景情况:
- 传统的水泥生产对环境产生了影响.
- 废物材料为可持续的建筑解决方案提供了潜力.
- 将废弃的聚乙烯 (WPVC) 纳入水泥材料是为了提高性能而进行的.
研究的目的:
- 调查用WPVC废物部分替换细砂对水泥混合物特性的影响.
- 为了确定机械,热,介电和抗菌性能的最佳WPVC含量.
- 评估WPVC改性水泥在抗静电和抗微生物应用中的潜力.
主要方法:
- 混凝土混合物 (350等级) 用WPVC替换百分比 (10-100%) 和对照 (0%) 准备.
- 进行了机械测试 (压力,屈曲强度),物理测试 (散装密度,吸收) 和介电性质测量.
- 通过在WPVC修饰的水泥样本上研究微生物殖民地生长来评估抗菌素的有效性.
主要成果:
- 压力和曲强度仍然可以接受,直到30%的WPVC更换.
- 在200°C的热处理提高了20%的WPVC混合物的强度和吸收.
- 对于抗静电应用,在30%的WPVC时,可以获得最佳的介电性质和导电性 (10^-12 S/cm).
- 加入WPVC证明了抗菌疗效,减少了微生物生长.
结论:
- 使用30%WPVC替代品的水泥糊对于抗静电应用是最佳的.
- 经过WPVC修改的水泥表现出增强的机械性能和抗菌活性.
- 这些材料推用于需要防治细菌感染和静电的环境.
更多相关视频
相关概念视频
Waterproofing and Anti-Bacterial Admixtures in Concrete
78
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,...
78
Brick Durability, Strength, and Appearance
186
Brick durability, strength, and appearance are crucial factors in construction, influencing the choice of bricks for specific applications. The process of freeze-thaw, for instance, significantly affects brick durability. This phenomenon occurs when water absorbed by a brick expands as it freezes, potentially causing damage when it melts and refreezes. Bricks are graded for durability: SW-grade bricks are the most durable, offering high strength and low water absorption, followed by MW-grade...
186
Bricks
94
Bricks, a fundamental building material, are crafted from fired clay and exhibit a range of shapes, sizes, and colors. The production process starts with extracting local clay or shale, which is then crushed, ground, and screened for a fine texture. The refined material is blended with water, creating a pliable mixture that can be formed into bricks using one of three processes: soft mud, dry press, or stiff mud methods.
Soft mud bricks are shaped in molds with high moisture content and can be...
Soft mud bricks are shaped in molds with high moisture content and can be...
94
Types of Cement II
107
Portland blast-furnace cement is made by blending Portland cement clinker with granulated blast-furnace slag, which accounts for 25 to 65 percent of the cement's weight. Despite its similarities to ordinary Portland (Type I) cement in terms of fineness and setting times, its early strength is lower, though it achieves comparable strength later on. It's particularly suited for mass concrete structures and marine environments due to its lower heat of hydration and superior sulfate...
107
Reinforced Brick Masonry
1.1K
Reinforced brick masonry is an advanced construction technique that enhances the structural integrity of brick walls by incorporating steel reinforcements. These reinforcements are either placed within the hollow cores of bricks or sandwiched between two layers of masonry, known as wythes, and are then secured in place with grout. Grout is a fluid mixture composed of Portland cement, aggregate, and water, providing the necessary bonding agent for the steel and brick.
To fortify brick walls...
To fortify brick walls...
1.1K
Plasticizers
75
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...
75


