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In this study, composite blast furnace slag powder (CBFS) was prepared by using RM, FA, DG, and BFS based on the synergistic effect of multiple solid wastes and the theory of medium-calcium systems (Fig. 1).Subsequently, CBFS-cementitious materials (CBFS-PO, that is, 50% CBFS + 50% Portland Cement PO 42.5) were prepared to …
CaO and MgO are both reported as effective activators for blast furnace slag. However, the synergistic effect of these two components on the mechanical properties of alkali-activated blast furnace slag remains unclear. In this study, the flexural and compressive strengths of alkali-activated blast furnace slag powder with MgO and CaO …
In this paper, the influence of water glass types, the modulus of water glass, the alkali content, the water consumption, and plant fibers on the mechanical strengths of alkali-activated blast furnace slag powder …
Investigating accelerated carbonation for alkali activated slag stabilized sandy soil. Original Paper. Open access. Published: 31 August 2023. Volume 42, pages …
In this study, "alkali-activated slag concrete" (AASC) and "alkali-activated slag–fly-ash concrete" (AASFAC) were developed which was then related with OPC concrete of alike design grade. GGBS and fly-ash were used in the mix, in ratio 100:0, 75:25, 50:50, and 25:75 as the binder ingredient. The modulus of alkaline activator was ...
The compressive strength of alkali-activated slag-fly ash concrete can be well predicted based on machine learning. ... The results of Table 11 illustrate that the production cost and carbon emission of C50 alkali-activated slag-fly ash geopolymer concrete can also be reduced by 15.7% and 73.8% compared with C50 ordinary …
2.1. Raw Materials. The alkali-activated blast furnace slag powder in this study is composed of the blast furnace slag powder, light-burned magnesia powder (MgO), potassium sodium silicate (K 2 SiO 3), sodium hydroxide (NaOH), water, expansive agent and refractory fiber.. The blast furnace slag (BFS) powder is provided by …
The AAS is composed of granulated blast furnace slag powder and an alkali activator. The slag was obtained from Wuhan iron and steel plant. The BET specific surface area of the adopted slag is 12,643 cm 2 /g; the fine particles (−20 μm) account for 87.13%; the uniformity coefficient ( Cu ) and curvature coefficient ( Cc ) are 5.68 and 0.75 ...
In order to realize the resourceful, large-scale, and high-value utilization of steel slag, which is a bulk industrial solid waste, and to reduce the use of cement-based cementitious materials, this study adopted the coupled excitation effect of sodium carbonate–magnesium oxide–desulfurization gypsum to excite steel slag-based …
There have been several successful cases of using gasification slag to prepare activated carbon. Miao et al. prepared high ash FS-based activated carbon through KOH activation at 800 °C. This activated carbon was employed for CO 2 capture. Furthermore, Tian et al. utilized CGFS to prepare activated carbon through KOH …
The coal gasification is the key process of clean usage of coal resource, which inevitably produces a large amount of coal gasification slag (CGS), and causes …
Abstract. Ultrafine, highly active coal gasification slag (HCGS) was produced via a sustainable, green dry-ball-milling method. Coal gasification fine slag …
*Briquette press machine is used to manufacture all kinds of coal powder, coal dust, slime, coking coal, coke powder, aluminum powder, iron powder, iron slag, scale, activated carbon, slag, gypsum, limestone, plastic, kaolin and tailing. *This briquette press machine is widely used in coal, metallurgy, chemical industry and other industries.
Similarly, the utilization of slag and slag-based materials has been proven to enhance the mechanical properties of cementitious materials while substantially reducing carbon emissions [16], [17]. Raju et al. (2019) conducted research on the preparation of alkaline-activated cementitious materials using fly ash and quartz powder, evaluating ...
The pressure ball machine can be used to press various powders, powders, waste materials, and waste residues such as coal powder, iron powder, coking coal, aluminum powder, iron filings, iron oxide scale, carbon powder, carbon powder, slag, gypsum, tailings, sludge kaolin, activated carbon, coke, etc.
The accumulation of steel slag and other industrial solid wastes has caused serious environmental pollution and resource waste, and the resource utilization of steel slag is imminent. In this paper, alkali …
This study was aimed to study the strength, thermal, microstructural and durability properties of ground blast furnace slag (GBFS) and waste brick powder (WBP) based one-part alkali-activated ...
March 18, 2024. Understanding Powder Activated Carbon: A Comprehensive Guide. Powder activated carbon ( PAC) stands as a pivotal purification agent renowned for its …
The use of slag-based alkali-activated concrete (AAC) could effectively address the issues of resource extraction and carbon emissions caused by traditional Portland cement. In this study, the effects of the fly ash content, water–binder ratio, and alkali activation modulus on the early mechanical properties of AAC were investigated.
For example, after adding microwave absorbing materials such as hot burned steel slag [32], carbon-based material [33], steel wool fiber [34] and activated carbon powder [35] to the asphalt ...
Steel slag can be applied as a promising carbon fixing material. This paper mainly explored the characterization and carbonation mechanism of steel slag and its products at relatively low CO 2 pressure. The experimental conditions were pure CO 2 gas, 0.02 MPa CO 2 pressure and 24 h carbonation time. The carbonation reaction degree of …
The aim of this study is to develop a low-carbon alkali activated slag based Ultra-High Performance Concrete (A-UHPC) with ultra-low moisture content. …
A commercial ground granulated blast-furnace slag (SG) from China was used as one of the raw materials in this study. The glass powder (GP) was made by crushing the recycled urban waste glass from Knoxville City Recycling Center in Tennessee using a Los Angeles abrasion machine (see Fig. 1).NaOH pellets from Fisher Scientific …
The flotation refined carbon was from a gasification slag site in Yulin region (the yield of refined carbon was about 21%). With reference to GB474â€"2008 [20], the refined carbon and coal samples were prepared by reduction, division and grinding to 200 mesh in the laboratory. After vacuum drying at 100 ℃, the samples were stored in ...
In the construction sector, the material supply chain of aggregates is frequently disturbed due to seasonal unavailability, quarrying issues, and environmental norms. The production of artificial aggregates has gained prominence to conserve natural resources and promote green construction practices. The current study encompasses …
The carbonated ladle slag is capable of taking 5–10% carbon dioxide by mass in 2-h carbonation and is used as fine aggregates in concrete [14]. Although there is no report on carbonated ladle slag as a cementing binder, there are a few demonstrated applications of CO 2 activated steel slag for strength gain.
In this study, the concept of "full-volume slag alkali-activated mortars (FSAM)" is proposed using ground granulated water-cooled blast furnace slag (GGBS) as aluminosilicate material and ACBFS to replace machine-made sand, aiming to solve the current situation of increasing scarcity of natural resources.
The results show that an appropriate dosage (30 wt%) of slag is necessary to attain alkali-activated slag/FA geopolymer paste with excellent mechanical performance, and the SF/slag/FA (SF: slag ...
The ultrafine powder grinding system is a new product independently developed by our company, mainly used to grind and classify various non-metallic ores in cement plants, such as the grinding of limestone powder, deep processing of pulverized coal, etc. This system is composed of an elevator, airlock device, superfine vertical mill (ultra-fine ...
This can serve as a filling in bulk building materials and coal mines or as a source of activated powder in construction. The maximum concentrate yield of GSP Y is 31.11%, and the maximum combustible …
Highlights. Preparation of calcium carbide slag-activated wet-ground fly ash based eco-friendly geopolymers. The wet grinding process is helpful for the refinement and pre-depolymerization of fly ash. Growth rate of compressive strength of wet-ground FA geopolymer is increased up to 319.5%. Mechanical activation synergizes with alkali ...
As the industrial waste from blast furnace ironmaking, air-cooled blast furnace slag (ACBFS) puts a lot of pressure on the environment. It is becoming more and more urgent to deal with the increasing ACBFS. In this study, the concept of "full-volume slag alkali-activated mortars (FSAM)" is proposed using ground granulated water-cooled …