Experimental Application Study on Iron Ore Tailings in the Mortar

The development of the national economy has been always depended on natural resources. The massive development of resource has resulted in large amounts of waste, and tailings sand is one of them. How to change waste into treasure, to solve the contradiction between environmental protection, energy supply and resource exploitation, more and more attention has been payed on it. This paper combined the development situation of iron ore tailings at home and abroad, based on its engineering properties, make it used in mortar. After replacing the cement and natural sand of mortar, we studied the influence on the engineering properties of mortar which are compressive strength, workability, and water consumption. The experimental results show that when the tailings ofreplacingratio is in a certain range, the adding tailings produce beneficial effect on the performance of mortar, whichcan meet the engineering requirements, save production costs, and improve economic efficiency.

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Study on Reducing ASR Expansion in Concrete Prepared with Iron Ore Tailings Sand

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.295-297.594 ◽

2011 ◽

Vol 295-297 ◽

pp. 594-597

Author(s):

Rui Ying Bai ◽

Ji Wei Cai ◽

Xiao Xin Feng

Keyword(s):

Iron Ore ◽

Fine Particles ◽

Mining Industry ◽

Natural Sand ◽

Manufactured Sand ◽

Granulated Blast Furnace Slag ◽

Iron Ore Tailings ◽

Tailings Sand ◽

Mortar Bar ◽

Furnace Slag

Iron ore tailings, wastes of mining industry, have been widely used as manufactured sand in concrete with absence of the natural sand. In present paper, the ASR reactivity of iron ore tailings sand was assessed with rapid mortar bar method (GB/T 14684-2001). Result of a preliminary study on ASR resistance was reported. The replacement of cement by 30% Fly ash (FA), 50% ground granulated blast-furnace slag (GGBFS), 10% metakaolin (MK) and replacement of sand by 15% ground iron ore tailings (GIOT) led to the ASR-expansion to below 0.10%. Compared with replacement of cement, replacement of sand led to better performance. Further more, the fine particles less than 75μm in iron ore tailings sand are beneficial to the reduction of expansion induced by ASR.

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Utilization of Iron Tailings Sand as an Environmentally Friendly Alternative to Natural River Sand in High-Strength Concrete: Shrinkage Characterization and Mitigation Strategies

Materials ◽

10.3390/ma13245614 ◽

2020 ◽

Vol 13 (24) ◽

pp. 5614

Author(s):

Zhiqiang Zhang ◽

Zhilu Zhang ◽

Shaoning Yin ◽

Linwen Yu

Keyword(s):

Iron Ore ◽

Autogenous Shrinkage ◽

Drying Shrinkage ◽

High Strength ◽

Mitigation Strategies ◽

Fine Aggregate ◽

River Sand ◽

Super Absorbent Polymer ◽

Iron Ore Tailings ◽

Tailings Sand

The increasing annual emissions of iron ore tailings have proved a great threat to the natural environment, and the shortage of natural river sand, as well as the pursuit of sustainable development materials, provides motivation to reuse iron ore tailings as a fine aggregate in concrete. Due to the significantly different properties of iron tailings sand compared with natural river sand—such as the higher density, higher content of limestone particles smaller than 75 μm and its rough and angular shape—concretes prepared with iron tailings sand show remarkably higher shrinkage. This study presents the shrinkage characterization and shrinkage-reducing efficiency of three different methods on iron tailings, sand concrete and river sand concrete. The internal humidity was also monitored to reveal the shrinkage-reducing mechanism. The obtained results indicated that the autogenous and total shrinkage of iron tailings sand concrete were 9.8% and 13.3% higher than the river sand concrete at the age of 90 d, respectively. The shrinkage reducing agent (SRA) was the most effective shrinkage reducing method for river sand concrete, while for iron tailings sand concrete, super absorbent polymer (SAP) and controlled permeable formwork liner (CPFL) it worked best on autogenous shrinkage and drying shrinkage, respectively. Furthermore, the shrinkage mitigation strategies worked earlier for the drying shrinkage behavior of iron tailings sand concrete, while no such condition could be found for autogenous shrinkage.

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The Research on Concrete Mix Design of Tailings Sand and Gravel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.468-471.1308 ◽

2012 ◽

Vol 468-471 ◽

pp. 1308-1312

Author(s):

Li Jie Ma ◽

Lin Zhang ◽

Jin Yu Zhang

Keyword(s):

Iron Ore ◽

Materials Science ◽

Design Principles ◽

Mix Design ◽

Natural Sand ◽

Concrete Mix Design ◽

The North ◽

Tailings Sand ◽

Concrete Mix ◽

Sand And Gravel

The technology of concrete of using tailings sand and gravel instead of natural sand and gravel belongs to Inorganic nonmetallic materials science, and the direction of the popularization and application is the field of civil construction .Using the iron tailings in the north of Tangshan as research sample,Besides it also been researched that mix design of concrete with iron ore tail and tail ore instead of natural sand, As a result the corresponding design principles have put forward.

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Experimental Study on the Properties of Concrete Mixed with Iron Ore Tailings

Advances in Materials Science and Engineering ◽

10.1155/2016/8606505 ◽

2016 ◽

Vol 2016 ◽

pp. 1-9 ◽

Cited By ~ 6

Author(s):

Zhong-xi Tian ◽

Zeng-hui Zhao ◽

Chun-quan Dai ◽

Shu-jie Liu

Keyword(s):

Mechanical Properties ◽

Industrial Waste ◽

Iron Ore ◽

Raw Materials ◽

Durability Test ◽

Natural Sand ◽

Optimal Amount ◽

Compression Performance ◽

Iron Ore Tailings ◽

Carbonation Resistance

The objective of this study is to evaluate the modified performance of concrete with mixing of iron ore tailings in order to solve the shortage of natural sand and make full use of industrial waste. Firstly, the raw materials of mixing were analyzed, and the test ratio was determined. Secondly, the workability and mechanical property of concrete specimens with different amounts of iron ore tailings as replacement were tested. Results show that 35% replacement of natural aggregate by iron ore tailings is optimal. Finally, tests of impermeability, frost resistance, and carbonation resistance were further performed for the concrete specimens with optimal amount of iron ore tailings. The compression performance of the specimens after a durability test was determined. The change in the mechanical properties of the specimens was obtained after seepage, freezing-thawing, and carbonation. Findings showed that the performance of the concrete with 35% replacement of iron ore tailings is basically equivalent to that of natural sand concrete. Hence, it can be utilized in engineering applications.

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Utilization of Iron Ore Tailings for the Production of Fly Ash — GGBS-Based Geopolymer Bricks

Journal of Advanced Manufacturing Systems ◽

10.1142/s0219686717500172 ◽

2017 ◽

Vol 16 (03) ◽

pp. 275-290

Author(s):

Raghunandan Kumar ◽

Pranab Das ◽

M. Beulah ◽

H. R. Arjun ◽

George Ignatius

Keyword(s):

Fly Ash ◽

Mine Tailings ◽

Blast Furnace Slag ◽

Iron Ore ◽

Natural Sand ◽

Granulated Blast Furnace Slag ◽

Iron Ore Tailings ◽

Silica Alumina ◽

Furnace Slag ◽

Geopolymer Binder

In India, million tons of manufacturing ravages such as ground-granulated blast furnace slag (GGBS), fly ash and mine tailings, are endangering. These ravages turn out to be injurious as they are landfilled close to the production sites and somewhere else. Since these manufacturing ravages include silica, alumina, calcium, etc., it is probable to formulate these as unprocessed resources to produce building substance which diminishes the carbon trace. In this circumstance, this analysis observes on utilizing iron ore tailings and slag sand as a substitution for clay or natural sand for the construction of steady geopolymer obstruct. Furthermore, in this analysis, geopolymer is utilized as a binder rather than cement. Expansion of geopolymer binder-oriented bricks with fly ash and GGBS has been implemented in this study. The analysis consists of automatic possessions of the geopolymer bricks. Sodium silicate ([Formula: see text]) and sodium hydroxide (NaOH) resolution have been employed as alkaline activators. The proportion of alkaline liquid to aluminosilicate solid quotient and fraction of binder encompass foremost control on the force of brick. The bricks were casted and cured at ambient warmth. The compressive strength was tested at 7, 14 and 28 days.

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Mechanical Characteristics of Pavers with Iron Ore Tailings

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.864.330 ◽

2017 ◽

Vol 864 ◽

pp. 330-335

Author(s):

J.N.R. Mantilla ◽

Diego N. Miranda ◽

Jamile Salim Fuina ◽

E.V.M. Carrasco

Keyword(s):

Compressive Strength ◽

Modulus Of Elasticity ◽

Iron Ore ◽

Compression Tests ◽

Natural Sand ◽

Static Modulus ◽

Concrete Mixtures ◽

Iron Ore Tailings ◽

Simple Compression ◽

Static Modulus Of Elasticity

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 iron ore tailings as aggregate concrete. Pavers were manufactured with four different concrete mixtures (cement, natural sand, industrial sand, iron ore tailings, crushed stone), and performed simple compression tests to determine the compressive strength and modulus of elasticity. The pavers manufactured with those concrete mixtures showed greater strength specified by the Brazilian standard. It was possible to find a correlation between modulus of elasticity and compressive strength.

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Solubilization of Phosphorus by Isolated Fungus of Iron ore Tailings

Passive Remote Study of the Aerosol in the Upper Atmosphere of the Earth ◽

10.47363/jeesr/2020(2)133 ◽

2020 ◽

pp. 1-6

Author(s):

Glalber Luiz da Rocha Ferreira ◽

◽

Geraldo Sadoyama ◽

Keyword(s):

Fungal Biomass ◽

Iron Ore ◽

Aspergillus Terreus ◽

New Technologies ◽

Production Costs ◽

Viable Alternative ◽

Innovative Behavior ◽

Mineral Extraction ◽

Iron Ore Tailings ◽

Soluble Phosphorus

In view of the high technological expectations in the mining sector today, an inability of miners to reach their totality in the use of minerals present in nature is verified, and this is caused primarily by the use of methods considered fallible in the mining process. In view of this condition, it is necessary to develop new technologies with innovative behavior, seeking more productive forms. Among the existing technologies, a study with a technological and promising view is proposed, which deals with the process of phosphorus biosolubilization from a synthetic source considered insoluble by a fungus isolated from iron ore. Genetic tests revealed that the microorganism belongs to the Aspergillus genus, that is, the Aspergillus terreus species. The analytical tests proposed in this study pointed to a solubilization of 90.93 % of phosphorus by fungal biomass, which corresponds to 296.56 mg L-1 of soluble phosphorus, occurring in a 168 hour process, accounting for an average solubilization of 1,76 mg h-1. The biosolubilization process proved to be a great technological alternative in reducing production costs and establishing the sustainability of the mineral extraction system, being a viable alternative in purifying and adding value to iron ore, and also in obtaining another compound consisting of phosphorus, generating a new economic source, as an example in the production of fertilizers.

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Effect of Iron Ore Tailings as Fine Aggregate on Pore Structure of Mortars

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.250-253.1017 ◽

2011 ◽

Vol 250-253 ◽

pp. 1017-1024 ◽

Cited By ~ 3

Author(s):

Lei Yu ◽

Jing Song Tian ◽

Jin Xi Zhang ◽

Rong Jun Yang

Keyword(s):

Pore Structure ◽

Iron Ore ◽

Fine Aggregate ◽

Structure Parameters ◽

Cement Concrete ◽

Natural Sand ◽

Iron Ore Tailings ◽

Pore Structures ◽

Fine Aggregates

Effect of iron ore tailings as fine aggregate on pore structure of mortars has been studied in this paper. The purpose is to investigate, as fine aggregate, comparing to natural sand, whether the iron ore tailings can improve the pore structures of mortars or not. Pore structure parameters were measured with the instrument of MIP and calculated with corollary software. The pore structure parameters from four kinds of mortars with different fine aggregates are compared with each other. This paper will provide more data about the use of this artificial aggregate, which may increase the feasibility of the use of this by-product in the mortar or cement concrete industry.

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