In this work, sustainable cement clinkers and ecofriendly cementitious materials (ECMs) were prepared with iron ore tailings (IOTs). Alternative raw meals with IOTs were …

Iron ore tailings (IOTs) are a form of solid waste produced during the beneficiation process of iron ore concentrate. In this paper, iron recovery from IOTs was studied at different points during a process involving pre-concentration followed by direct reduction and magnetic separation. Then, slag-tailing concrete composite admixtures were prepared from high-silica …

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 ...

In addition, since the main chemical constituents of IT are SiO 2, Fe 2 O 3 and Al 2 O 3, finer ITS can be used directly or grinded as iron tailings powder (ITP) and then used to partially replace cementitious materials in concrete mixtures [39], for which that the tailings exhibit pozzolanic activity after mechanical activation to a fine ...

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 ...

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.

To address the problem of permeation of tailings pond initial dams rockfill dams, fiber-reinforced cement tailings sand-based grouting (FRCTG) material, which can be used for rockfill dam reinforcement, was prepared by selecting ordinary portland cement (OPC), iron tailings sand (ITS), basalt fiber (BF), fly ash (FA) and water as the raw materials. . Orthogonal …

Carrasco et al. studied the elastic modulus of cement mortar with iron tailings sand and confirmed that iron tailings sand can be used as a building material. According to the …

Iron tailings powder can be used as a concrete admixture. As one of the largest solid wastes, iron tailings seriously threaten the safety of personnel and environment. The sharp …

In addition to being used as aggregates, the iron ore tailings can also be used as cementitious materials . It is found that employing iron ore tailings to replace cement can optimize the mechanical properties of ordinary concrete [11,31,40], and the feasibility of adding IOT into ordinary concrete is pointed out . However, there are ...

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

(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 ...

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;

As a result, the utilization of tailings in cement and concrete will be good for the environment both in the solid waste processing and materials using in the construction industry. Mineral ...

Iron tailings can be used as fine ... thus it is feasible to replace part of natural fine aggregate with iron tailings sand. ... Raw Material 2.1.1. Portland Cement and Iron Tailings ...

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.

The control group is a standard cement mortar specimen with a water-cement ratio of 0.5, Group (S) is a mortar specimen that natural sand is used to replace 20% cement (90 g sand is used instead of 90 g cement). Group (T) is the tailing mixed mortar specimens with mineral powder instead of 20% cement [21,22].

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.

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 …

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 …

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.

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.

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 …

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 …

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 ...

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 …

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 …

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 ...

Raw Materials. 2.1.1. Cement and Aggregate . Portland cement with a Blaine fineness of 350 m 2 /kg, ... Studies [7,11,12,13] have shown that iron tailings sand could be used in concrete as sand replacement, and in order to maximize the effect of iron tailings sand in reducing environmental problems, cost and natural resources depletion, a ...

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].