可持续的二元/三元混合砂与使用飞灰或爆炸渣的回收水处理污泥:特征和环境经济影响
1Department of Civil Engineering, Faculty of Engineering and Natural Sciences, Malatya Turgut Ozal University, Malatya, Türkiye. ceren.kina@ozal.edu.tr.
Environmental science and pollution research international
|January 30, 2024
概括
再循环水处理污泥 (WTS) 与飞灰 (FA) 或地面颗粒高炉渣 (BFS) 混合,为水泥提供了一个可持续的替代品. 这种方法可以减少环境影响和成本,同时保持可比材料性能.
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.
- 环境工程 环境工程
背景情况:
- 污水处理污泥 (WTS) 是一种需要处理的危险废物.
- 补充的水泥材料可以减轻与水泥生产相关的环境问题.
- 将废物回收成粘合剂对于可持续建筑至关重要.
研究的目的:
- 调查使用再生WTS作为三元混合粘合剂与飞灰 (FA) 和地面颗粒高炉渣 (BFS) 的潜力.
- 评估含有改性WTS (MWTS) 的砂的风学,机械,耐用性,微观结构和环境经济性质.
- 确定废物产品的最佳利用方法,以制造环保,经济高效的水泥基材料.
主要方法:
- 砂是用MWTS作为二元混合物取代水泥的0-30%重量生产的.
- 通过将MWTS与FA/BFS相结合,创建了三元混合粘合剂.
- 评估的属性包括气质学,机械强度,耐久性,微观结构 (XRD,SEM) 和环境经济方面.
主要成果:
- 添加10%的回收WTS作为二元混合物增加了强度,降低了多孔性和微观结构密度.
- 将FA/BFS与MWTS相结合,抑制了负面的质影响和环境缺点,产生了相似的强度.
- 将10%的MWTS与FA相结合,降低了8.87%的成本,降低了37.88%的二氧化碳足迹,降低了33.07%的体现能源,并减少了轻微的强度.
结论:
- 回收的WTS可以有效地作为三元混合粘合剂的组成部分.
- 添加FA/BFS减轻了仅使用WTS的局限性,增强了环境和经济效益.
- 这项研究提出了一种可行的方法,用于生产更环保,更具成本效益的基于水泥的材料,使用回收的WTS.
更多相关视频
相关概念视频
Mortar Properties
124
Mortar properties encompass a range of characteristics crucial for construction and masonry work, including workability, water retention, bond strength, durability, compressive strength, volume change, and appearance. Workability refers to mortar's ability to be easily applied and manipulated without sagging or falling off surfaces, which is important for efficient masonry unit placement and alignment. Water retention is essential to prevent the mortar from losing moisture too quickly to...
124
Types of Cement II
109
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...
109
Pozzolans
112
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...
112
Mortar
217
Mortar, a mixture of Portland cement, hydrated lime, sand, and water, is a crucial binding material in construction. Its primary function is to join masonry units together, filling gaps and ensuring a uniform distribution of weight across the structure. This helps in preventing potential weaknesses. Mortar also serves as a protective barrier against environmental elements such as water and wind, thereby safeguarding the interior of the structure. It also compensates for surface irregularities...
217
Additives and Fillers in Concrete
96
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...
96
Design Example: Sustainability in Concrete Building
167
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...
167


