Iron tailings sand (ITS) is the waste after iron ore beneficiation [13]. Iron tailings sand can be used to replace natural sand in the process of making concrete [14,15]. The appli-cation of iron ...
In this experiment, the effect of using iron tailings as an aggregate in concrete was studied. Four groups of mix ratios were designed, namely iron tailings sand concrete …
Iron ore tailings (IOTs) are a typical industrial solid waste made up of oxides or clay silicate minerals such as quartz, feldspar, pyroxene, hornblende, etc. . By 2018, the stockpile of tailings reached 5 billion tons in China . This stockpile not only occupies cultivated land but causes serious pollution to air and water [14,15]. The large ...
Based on the x-ray fluorescence test, the oxide composition of the iron ore tailings are indicated in Figure 1. The figure revealed that the dominant oxide in iron ore tailings is silicon dioxide (SiO2). These oxides structure of iron ore tailings can …
The results reveal that when 20% of the river sand was replaced with iron tailings, the concrete achieved optimal splitting strength, compressive strength, and flexural strength at 28 days ...
How to make concrete aggregate from iron ore tailings? If the iron ore tailings are used as fine aggregate, a certain particle size is required. Coarse sand makes the concrete relatively dry, reduces viscosity, and has poor …
Iron tailings sand is a kind of mineral waste, and open-air storage is a common treatment method for iron tailings, which not only has a huge impact on the ecological environment but also occupies a lot of land resources. ... and angular shape of iron tailings particles, iron tailings-made concrete has better ITZ properties and durability than ...
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.
IJESC, 2019. Iron Ore Tailings (IOT) are the waste slag resulted from iron ore mines. Large amount of Iron Ore Tailings (IOT) have been generating every year posing serious environmental problems, large production of cement everyday resulting the emission of CO 2 and increase in the consumption of river sand for construction activities making the river beds over-exploited.
There is evidence that iron ore tailings can be used as concrete.It is understood that as early as July 2020, the Ministry of industry and information technology has issued a relevant notice to …
Dolomite rock powder (the waste stone residue in the production of machine-made sand and stone processing) and iron tailings powder formed by mineral processing industry are solid wastes, which ...
Data will be made available on request. References [1] M. Voigt, J. von Werder, B. Meng. ... Utilization of iron tailings sand as an environmentally friendly alternative to natural river sand in high-strength concrete: shrinkage characterization and mitigation strategies. Materials, 13 ...
Hou Y F [28] used iron tailing sand and river sand to produce concrete and found that as the fineness modulus of iron tailing sand increases, the strength of concrete with iron tailing sand is slightly higher than that of concrete with river sand. Wang W W's research [29] showed that at the same temperature, the cubic compressive strength of ...
with iron tailings as partial replacement for sand is made. Cementitious material in the mixture was replaced with red mud at 1%, 2%, 3% and 4%. For each red mud replacement level, 10% of fine aggregate (regular sand) was replaced with iron tailings Keywords: Red mud, Self-Compacting concrete (SCC), Iron tailings.
Using iron ore tailings (IOTs) as the main aggregate for concrete will not only save crushed stone mining but will also reduce the environmental impact of IOTs. A discrete element model of concrete with realistic IOTs shape was developed using particle flow coding 3D technique. The accuracy of the numerical model was verified with the laboratory uniaxial …
However, in most previous researches, IOT mainly covers three categories: (i) iron tailings rock, used as coarse aggregate, of particle size >4.75 mm, is produced by mechanical crushing low-grade ore and wall rock. (ii) iron tailings sand, used as fine aggregate, particle size ranging from 0.16 mm to 4.75 mm, is produced by
On the other hand, construction and industrial wastes occupy land and pollute the environment. From practical experience at home and abroad [1], [2], [3], one of the means to resolve the contradiction between the supply and demand of aggregate is to make sand and stone for construction from iron tailing sand (IT) and recycled coarse aggregate ...
Sand mining tailing (ST) is a byproduct of the sand extraction of submerged pits, a process which is carried out to obtain aggregates for civil construction. This tailing consists of fine particles from the pulp washing process, usually disposed of in decantation ponds. The present study proposes ST as a supplementary cementitious material (SCM) for Portland cement …
Dolomite rock powder (the waste stone residue in the production of machine-made sand and stone processing) and iron tailings powder formed by mineral processing industry are solid wastes, which occupy land resources, pollute the environment and release toxic substances without reasonable processing. The dolomite rock powder and iron tailings powder …
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 …
performance of iron, copper, and gold tailings in place of sand despite the varied proportion of these tailings. Fig. 1 and Fig. 2 show the maximum percentage replacements of sand with iron tailings and copper tailings as recommended by various authors respectively. Based on the maximum percentage replacement, it was suggested
Huang et al. prepared engineered cementitious composites (ECC) from iron tailings sand instead of quartz sand, while the effect of particle size on the viscosity, tensile …
lower, indicating a chemical reaction occurred between the iron tailings and cement paste. Generally, the iron tailings sand with higher SiO 2 content and ner particles tend to have higher activity. In addition, the pozzolanic activity of iron tailings powder could be greatly promoted by chemical activation, especially by acid activation.
[1] Owolabi, A. O. (2007). Comparative analysis of the engineering properties of iron ore tailings, stone dust and sharp sand [Master Thesis], 19–22. [2] McKinnon, E. (2002). The environmental effects of mining waste disposal at Lihir Gold Mine, Papua New Guinea. Journal of Rural and Remote Environ mental Health, 1(2), 40–50. [CrossRef]
The tailings have similar physical and chemical properties with cement and river sand to some extent [7], [8], which makes it possible for tailings to replace cement or river sand for concrete production.In this way, it can provide a way to consume tailings and play a role in energy conservation and environmental protection [4], [9].Usually, tailings need to be pre …
2 Aggregate (1) The fine aggregate is a mixed sand made of machine made sand and iron tailing sand, among which machine-made sand is made locally in Jinan, with a fineness modulus of 3.1-3.3, a stone powder content of less than 10.0%, and a methylene blue test qualified ; The iron tailing sand is produced in Changqing area, Jinan, with a ...
A technology of iron tailings ultra-fine sand and mixed sand, which is applied in the field of high-strength concrete and concrete preparation, can solve the problem that the utilization rate of iron tailings is less than 5%, and achieve improved pore size and distribution, good water retention, and cost reduction Effect
2024 Beijing International Sand and Stone, Tailings and Construction Waste Treatment Technology and Equipment Exhibition. Time: April 17-19, 2024 Location: Beijing International Exhibition Center. Exhibition background: In recent years, China's sand and gravel aggregate industry has made significant progress. With the high-quality development ...
CCTSCs were essentially made with a systematically merged combination of tailings, binding, and tap water. 6 groups of experiments were set up according to different proportions of tailings and sand, and the material consumption is shown in Table 1. Slurry concentration is set to 80w%, cement/solidity (sand-tails) ratio (c/s) is 1:3, and TR is ...
The objective of this study is to evaluate experimentally the mechanical compressive strength and static modulus of elasticity of concrete pavers for floors made with …
