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High contents of steel slag in the road concrete: Hydration …

Steel slag (SS) is the main by-product in the steel production process. The main chemical components of SS are CaO, SiO 2, Al 2 O 3, FeO and MgO.The main mineral phases are dicalcium silicate (C 2 S) and tricalcium silicate (C 3 S), which are similar to cement [1], [2], [3].At present, Chinese annual crude steel output can reach more than 1 billion tons, and the …

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Disintegration characteristics and mechanism of red clay …

While steel slag powder can effectively enhance the mechanical strength of soil and significantly reduce its water-induced swelling behavior ... In order to ensure the integrity and compactness of the specimens, five layered compaction was carried out during the sample making process, with the same mass of soil weighed in each layer, and the ...

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Effects of steel slag on the microstructure and mechanical …

The effects of steel slag (SS) addition on the strength and water resistance of magnesium phosphate cement (MPC) are investigated, and the hydration mechanism is proposed in this paper. With the addition of SS, the strength and water resistance of MPC were significantly enhanced. The compressive strength of MPC with 10 wt% SS (SS 10) cured in air for 60 d …

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Research on macro-microscopic mechanical evolution …

This shows that the crushing resistance, impact resistance and compactness of steel slag aggregate are higher than those of crushed stone. The wear loss of steel slag in Los Angeles is larger than that of crushed stone, and it has a better ability to resist impact and friction. Steel slag has strong water absorption, and its water absorption ...

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Preparation of 3D-Printed Concrete from Solid Waste: Study of …

Steel slag particles ranging from 5 to 20 μm had the most significant influence on enhancing the rheological properties of 3D-printed steel slag cementitious materials by facilitating the formation of a flocculated mesh structure during early hydration. Optimal rheological performance was achieved with a dosage level of 10% steel slag ...

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Preparation and microstructure analysis of alkali-activated ground

Steel slag (SS) and ground granulated blast furnace slag (GGBFS) are the main industrial byproducts of steel production [1], [2]. The global annual production of SS has exceeded 130 million tons. ... and the internal compactness of the specimens was very good, with only a few small holes. The surface of specimen No. 27 was also very flat, with ...

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Influence of the Steel Slag Particle Size on the …

The steel slag with a fine particle size can better fill the pores in concrete and improve the compactness, thus enhancing the mechanical properties of concrete.

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Research on engineering properties of cement mortar adding …

The total steel slag produced in steelmaking is not disposed of and properly utilized by about 55–78% in China [15]. The annual output of crude steel is about 21.39 million tons in Taiwan, including approximately 0.4 million tons of SSRS, 1.5 million tons of basic oxygen furnace (BOF) slag, and 4 million tons of granulated blast furnace slag ...

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Evaluation of the engineering properties and durability of mortar

Steel slag-slag composite powder (SSCP) has three exothermic peaks, which are the dissolution peak, hydration peak of steel slag and pozzolanic ash reaction peak of GBFS (after 85 h), respectively.

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Understanding the dynamic rheological property of cement paste …

The primary mineral compositions in steel slag, including C 2 S, C 3 S, C 4 AF, etc., resemble those found in Portland cement, exhibiting some cementitious performance. This makes steel slag powder (SS) a useful mineral admixture. It is generally believed that the addition of SS can improve the workability of cement paste, as documented in prior research [4], [5].

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Interdependent factors contributing towards carbonation of steel …

In this study, a kind of widely available steel slag, basic oxygen furnace slag (BOFS), was used as the sole material for fabricating dry-mixed compacts; the interactions of …

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Hydration and Compressive Strength of Activated Blast-Furnace Slag

Alkali-activated materials (AAMs) are regarded as an alternative cementitious material for Portland cement with regards to sustainable development in construction. The purpose of this work is to investigate the properties of activated blast-furnace slag (BFS)–steel slag (SS) with sodium carbonate (NC), taking into account BFS fineness and Na2O equivalent. …

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Effect of the combination of polyvinyl chloride (PVC) and steel slag

The utilization of smaller steel slag particles resulted in enhanced particle packing and increased the overall compactness of concrete. Incorporating steel slag at a 10% replacement rate resulted in a pulse velocity that is 1% higher compared to the control mixture.

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Application of Steel Slag in Road Semi-Rigid Subgrade and

The physical and mechanical properties of steel slag are comparable to those of natural aggregates. Reusing steel slag on a large scale as a substitute for natural aggregates can greatly reduce the need for natural resources and lower environmental harm, resulting in notable economic, environmental, and social benefits. However, the limited volume stability of steel …

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(PDF) Influence of the Steel Slag Particle Size on the Mechanical

The steel slag with a fine particle size can better fill the pores in concrete and improve the compactness, thus enhancing the mechanical properties of concrete.

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Investigation on phosphogypsum–steel slag–granulated blast-furnace slag

This study investigated a cementitious material by utilizing two industrial wastes, phosphogypsum (PG) and steel slag (SS), combined with another industrial byproduct ground granulated blast-furnace slag (GGBFS) and limestone (LS). The 28d compressive strength of a mixture of 45% PG, 10% SS, 35% GGBFS and 10% LS exceeded 40 MPa. XRD and SEM ...

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Carbon dioxide sequestration on steel slag

The carbonation method of steel slag can be divided into direct and indirect carbonation (Yadav et al., 2017; Shi et al., 2012a).Direct carbonation is a single carbonation reaction step under a dry, moist, or aqueous environment without the aid of extraction agents and is convenient to conduct (Bodor et al., 2013).However, a high temperature, high gas pressure, …

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Investigation on the Mechanical Properties and Microscopic

Additionally, the steel slag aggregate and the active components in the modified coating could interact, resulting in the hydration products effectively filling in the pores and microcracks of the ...

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Insights to compressive strength, impermeability and …

Noticeably, steel slag still faces some intractable problems as construction materials on a large scale, including the potential volume instability and low hydraulic property [11], [12], [13].The f-CaO and f-MgO in steel slag will react with water and convert into Ca(OH) 2 and Mg(OH) 2, causing the volume expansion of steel slag [14].Meanwhile, steel slag exhibits …

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(PDF) Road performance, VOCs emission and …

The compactness value and standard deviation of steel slag asphalt pavement and basalt asphalt pavement as illustrated in Fig. 6 (a). Obviously, the compactness value and standard deviation of

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Study on the Performance of Steel Slag and Its Asphalt Mixture …

Calcium oxalate is generated on the surface of treated steel slag, which improves the surface compactness, effectively inhibits the expansion of steel slag caused by water …

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Capillary of engineered cementitious composites using steel slag

Steel slag (SS), a common solid waste generated during steel manufacturing, ... [50, 51], increasing the overall compactness of the matrix [34] and slowing chloride transport. Interestingly, while ECC mixtures with 25 % SS content exhibited superior compressive strength, those with 50 % SS content demonstrated better absorption, void content ...

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Accumulation-hydration effect of steel slag powder and its …

Steel slag contains C 2 S, C 3 S, C 4 AF, and C 2 F and is mineralogically similar to cement, giving some cementing activity [19], [20]. ... The coarsened pore structure lowers the compactness of matrix and fiber/matrix interfacial bond and compromises its mechanical properties [54], [55]. In addition, due to the 15 % steel slag powder and 1.5 ...

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Study on Permeability of Steel Slag and Steel Slag …

Permeability curves of three kinds of steel slag with changing void ratios: (a) fine steel slag; (b) coarse steel slag; (c) gravel steel slag. It was found that it was difficult to compact fine steel slag in the process of sample …

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Compaction Procedures and Associated Environmental Impacts

The results show that the steel slag has a better surface texture than the natural aggregates; physical properties including compactness, flatness and compressive strength comply with the requirements for applying steel slag to a hydraulically bound mixture. Compared to the base layer using andesite aggregates, the compaction vibration period ...

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Experimental and numerical study of steel tubes filled with steel slag

The lower porosity of the steel slag-based artificial aggregate at a 1.4:1 ratio indicates greater compactness, while a higher gel pore content suggests a more uniform and stable internal structure, contributing to enhanced compressive strength and toughness of the material. ... Sieve the steel slag-based artificial aggregate with particle size ...

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Hydration and Microstructure of Steel Slag as Cementitious

Due to the low hydration activity and poor volume stability, extensive steel slag utilization is restricted. In this paper, the hydration process and microstructure of alkali-activated materials with steel slag as a cementitious material and fine aggregate were studied. The phase composition and micro-morphology of hydration products were measured using XRD, NMR …

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A Review on the Carbonation of Steel Slag: Properties, …

Steel slag is a by-product of the steel industry and usually contains a high amount of f-CaO and f-MgO, which will result in serious soundness problems once used as a binding material and/or aggregates. To relieve this negative effect, carbonation treatment was believed to be one of the available and reliable methods. By carbonation treatment of steel slag, the …

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Utilization of steel slag as partial replacement for coarse …

The utilization of steel slag for industrial and construction purposes has gained significant attention in recent years due to its abundant availability and potential environmental benefits. This study explores the feasibility of utilizing steel slag as a coarse aggregate in concrete, aiming to determine the optimal replacement percentages for desired mechanical …

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Recycling of steel slag aggregate in portland cement concrete: An

Steel slag is a solid industrial byproduct of steelmaking and is a promising alternative aggregate in concrete due to its unique characteristics (Guo et al., 2019). Steel slag is generated during the process of extracting impurities from steel with lime (CaO), dolomite (MgO), and other auxiliary materials.

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