在绿色生长的混凝土中利用空气混凝土粉和咖啡粉灰的利用潜力
Jinping Li1, Rong Huang2, Zheng Chen1
1College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710100, China.
Materials (Basel, Switzerland)
|June 27, 2024
概括
从消耗的咖啡粉 (SCG) 和空气混凝土块 (ACB) 中回收的粉末可以增强绿色生长的混凝土. 用这些回收材料取代5%的水泥可以提高混凝土的强度,并改变其性和抗性.
科学领域:
- 材料科学 材料科学 材料科学
- 可持续建筑 可持续建筑
- 废弃物价值化 废弃物价值化 废弃物价值化
背景情况:
- 对于可持续建筑材料的需求日益增长.
- 需要有效利用工业和家庭废物.
- 回收材料在具体应用中的潜力.
研究的目的:
- 调查使用的咖啡粉 (SCG) 灰和空气混凝土块 (ACB) 粉作为绿色生长混凝土中的补充混凝土材料的潜力.
- 评估这些回收材料对混凝土机械性能和耐久性的影响.
- 为了确定SCG灰和ACB粉的最佳替换百分比.
主要方法:
- 绿色生长的混凝土混合物被准备好,其中不同百分比的ACB粉末 (5%,15%,25%) 和SCG灰 (5%,10%,15%) 取代了水泥.
- 确定了ACB粉和SCG灰的最佳含量.
- 测量了7天和28天的压力强度.
- 性和耐性 (经过25次冷解周期) 在28天后被评估.
主要成果:
- 发现ACB粉和SCG灰的最佳替代水平为5%.
- 用回收粉代替5%的水泥提高了混凝土的强度.
- ACB粉增加了混凝土的性,而SCG灰降低了它.
- 耐性有所不同:ACB粉末降低了耐性,SCG灰最初增加,然后显著降低了耐性,ACB-SCG粉末组合显示出中和作用.
结论:
- 消耗的咖啡粉灰和空气混凝土块粉可以有效地用于绿色生长的混凝土.
- 用这些回收材料取代5%的水泥可以提高混凝土的强度.
- ACB粉和SCG灰的组合提供了一种平衡的方法来改变混凝土的性和抗性质.
更多相关视频
相关概念视频
Additives and Fillers in Concrete
93
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...
93
Pozzolans
110
Pozzolans are siliceous or aluminous materials blended with Portland cement. They interact with the calcium hydroxide produced during the hydration of Portland cement and contribute to improved strength and durability of concrete. The pozzolanic activity, a measure of a pozzolan's effectiveness, is typically assessed using the strength activity index, as defined in ASTM C 618-93, which calculates the ratio of the compressive strength of cement mixtures with and without pozzolan.
Fly ash is...
Fly ash is...
110
Design Example: Sustainability in Concrete Building
164
As the construction industry moves towards more eco-friendly practices, concrete's adaptability and its ability to incorporate sustainable features make it a key material in the drive towards greener building solutions.
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
There are multiple approaches to achieve sustainability in a commercial concrete building. For instance, construct a concrete parking area under the building, utilizing pervious concrete paver blocks in open areas to facilitate rainwater collection through an underground...
164
Abrasion Resistance of Concrete
125
Abrasion resistance is an essential characteristic of concrete that determines its durability and longevity under various wear conditions. Concrete surfaces are vulnerable to different types of abrasion. For instance, surfaces may wear down due to the constant movement of vehicles or be eroded by solids carried in water, as seen in concrete canal linings. Specific tests are conducted to measure the abrasion resistance of concrete.
One such test is the revolving disc test, where three plates...
One such test is the revolving disc test, where three plates...
125
Concrete
335
Concrete is a vital construction material extensively used worldwide, primarily valued for its strength, durability, and versatility, which it provides for various structural designs. Concrete generally comprises ingredients like Portland cement, coarse gravel, fine sand, and water. Concrete can be mixed by simple hand methods or industrially at computer-controlled plants. The mixture consists of aggregates and a paste made from water and Portland cement. This paste coats the aggregates and,...
335
Effects of Air-entrainment in Concrete
82
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...
82


