In this paper, the iron tailings powder, iron tailings sand and iron tailings gravel in Qian'an city are used to replace fly ash, river sand and gravel respectively as admixture, fine and coarse aggregates of concrete. Through mix design, the high-fluidity concrete with strength grade C25, C30 and slump of 180~200mm is prepared.
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1. Introduction. How to address and utilize iron tailings sand (ITS) has become an important topic [1 – 3].Many scholars regard iron tailings sand as a fine aggregate in concrete, which not only solves the pollution problems but also provides raw materials for construction [4 – 7].Lv et al. [], Umara Shettima et al. [], and Cheng et al. [] found that the strength of concrete …
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The novelty of this research lies in the underexplored use of iron tailings as a primary raw material for geopolymer production, providing a sustainable solution to both waste management and reducing environmental impacts in the construction sector. ... Aluminium hydroxide waste based geopolymer composed of fly ash for sustainable cement ...
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Iron tailings sand is made from waste residue after beneficiation, and if it can be used to replace natural sand to prepare iron tailings sand concrete, it will have a positive impact on the …
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A lot of literature shows that the content of stone powder in iron tailings can change the properties of concrete, so iron tailings can be used as cement-concrete compound materials. 2.2.2 Other materials The experimental materials used, using 32. 5 …
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This study investigates the use of iron mine tailings (ITs) as a fine aggregate and a clinker-free binder composed of ground granulated blast-furnace slag (GBFS), desulfurization gypsum (DG), and basic oxygen furnace slag (BOFS) to produce low-cost ultra-high-performance concrete (UHPC). The research optimizes the UHPC base by evaluating the impact of key …
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Sandy iron ore tailing 34 can be used to make concrete in . ... that have used iron ore tailings for various technological . ... by the production chain that will use them as raw materials;
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Tailings sand is composed primarily of organic carbonaceous and inorganic silicate minerals, which can be used as siliceous raw materials and aluminium raw materials. In recent years, scholars have studied the application of tailing solid waste materials through alkali activation technology [16], [17].
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use of tailings as a sand replacement in concrete mixtures. Several studies reported the effects of iron tailings as a sand substitute in concrete. Otieno and Odoro [31] investigated the workability and compressive strength of Kimberlite tailings' concrete. Oritola et al [19], Sabat et al [55], Tian et al [56] investigated the workability of
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2.4. Mineral Admixture. Adding admixture, fly ash into raw materials, is an important way to get high-performance concrete. Amorphous active substance of Al 2 O 3 in fossil waste of fly ash can react chemically with Ca(OH) 2.This form of attack directly leads to the formation of gel component and reduction of the porosity in concrete [].As a result, the …
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Investigators [17], [18], [19] developed a new type of cementitious material by taking advantage of the synergistic effect of blast furnace slag and steel slag. The required amount of new cementitious material in the full-tailings backfill was only 50% of the crude cement amount. The strength of the backfill with a cementitious material-sand ratio of 1:4 was 5.76 …
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As the iron and steel sector expands quickly, emissions of industrial waste iron tailings sand from ore dressing rise year over year, yet only 20% of iron tailings sand is recycled as resource [2].
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e iron tailings sand was used as ne aggregate to pre - pare cement mortar, and the river sand was used for comparison, and a prex letter G and D, corresponding to the water/binder ratios of 0.48 and 0.34, was added to name the mortars prepared with them. e uidity of Fig. 1 Natural river sand and iron tailings sand samples
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Step 4 Prepare concrete. Raw materials are prepared to make high-strength concrete materials. Take the iron tailings concrete prepared by Ftmmachinery as an example: Raw materials. Cement: Ordinary Portland cement. Know more about the cement grinding station. Aggregate: (1) Fine aggregate: Mixed sand of iron tailing sand and artificial sand ...
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Three kinds of concrete (ordinary concrete, concrete with iron tailings sand (ITS), and concrete with ITS modified by polypropylene fibers) were exposed to drying-wetting cycles in 5% Na2SO4 ...
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Iron tailings can be made into iron tailing sand, which is mixed with conventional aggregates such as artificial sand to produce concrete that meets demand, such as C50 concrete. This kind of aggregate concrete has better …
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Autoclaved aerated concrete (AAC), a porous construction material [1], [2], is commonly utilized in lightweight partition walls owing to its thermal and acoustic insulation capabilities [3], [4], [5], [6].The raw materials used in AAC are primarily siliceous and calcareous cementitious materials [7].More than 95% of the entire substance is made up of these two …
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It has been demonstrated that iron ore tailings can be applied to produce concrete materials [11,31]. It is found that the mechanical property of engineered cementitious composites (ECC) …
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Besides, three-dimensional network structure of geopolymer makes its physical and chemical properties stable and can effectively solidify heavy metal elements of raw materials [9]. Therefore, aluminosilicate tailings can be used as raw materials for geopolymers, and find a way out for the bulk utilization of iron tailings.
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A high-strength concrete material was prepared by using fly ash and iron ore tailings as major raw materials. Reaction products and microstructure of hydrated harden samples of the high-strength ...
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Iron tailings sand had a more significant influence on the water permeability of concrete than iron tailings rock. When iron tailing sand and iron tailings rock replaced NS and gravel, respectively, the water permeability of concrete first reduced and then increased with the replacement ratio of iron tailings sand and iron tailings rock increasing.
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Experimental study on iron ore tailings sand and municipal solid waste incineration fly ash used in semi-rigid base of asphalt pavement. ... After partially replacing the cement with raw ash, the structural strength is not high, and the frost resistance is not good. ... It suggests a new material that can be used at the pavement base, reducing ...
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(1) The use of iron ore tailings can not only solve the problem of iron tailings storage, natural sand supply and raw material cost, but also turn waste into treasure, improve the environment and ...
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These two corrective materials can be obtained from tailings. Some metal mine tailings which contain much iron content, can be sold to cement plants and used as iron corrective raw materials. And some iron ore tailings which contain much silicon and iron can also be used as iron and silicon corrective materials. 7.
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2.1 Raw Materials. The cement used was Ordinary Portland Cement (P·O 42.5), which complied with the requirement of Chinese standard GB175-2007. The iron tailings (FN, PS, CD, BD, and LY) were selected from different regions in Hebei Province of China, as shown in Fig. 1, and the natural river sand (TR) was used to make a comparison.Their chemical …
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Iron tailings are a rich mineral waste resource with basic properties similar to river sand and can be used as a modified material for raw soil construction. To increase the utilization rate of iron tailings and improve the mechanical properties of earth materials, modification of earth materials were analyzed using iron tailings and cement.
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Iron ore tailings (IOT) show great potential in this regard. Numerous studies have evaluated their use both as supplementary cementitious material (SCM) and as aggregates.
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As a result, previous studies [7] [8] [9][10][11] indicate that gold mine tailings can be used as fine sand for construction and raw materials for ceramics, brickmaking, and cement. However, due ...
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clay, limestone, quartz sand, and iron ore were used as raw materials for Portland cement clinker production. Two di erent kinds of alumina-silicate material (clay and IOT) were used in the experiment. e calcareous material was limestone. Quartz sand and iron ore were used as corrective materials to adjust the contents of silicate and iron of raw
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Among the numerous PG treatment methods, using PG to prepare composite cementitious materials has emerged as a prominent research focus in academia, particularly in achieving large-scale utilization of PG [5].Within this context, supersulfated cement (SSC) prepared using PG as a raw material has attracted considerable interest due to its exceptional performance.
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