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

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
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.

Experimental Application Study on Iron Ore Tailings in the Mortar

2017 ◽  
Vol 873 ◽  
pp. 203-207
Author(s):  
Ying Jie Chen ◽  
Ying Wei Song ◽  
Gen Li ◽  
Teng Teng ◽  
Jian Xun Yang
Keyword(s):  
Iron Ore ◽  
Production Costs ◽  
Engineering Properties ◽  
Resource Exploitation ◽  
Natural Sand ◽  
Application Study ◽  
Experimental Application ◽  
Iron Ore Tailings ◽  
Tailings Sand ◽  
Massive Development

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.

Recycling of Concentration Tailings of Iron Ore for the Production of Concrete Block (Pavers)

2014 ◽  
Vol 775-776 ◽  
pp. 631-634 ◽  
Author(s):  
Fabiane Leocádia da Silva ◽  
Fernando Gabriel S. Araújo ◽  
Camila G. Castro ◽  
Jefferson J. Mendes ◽  
Fernando L. von Krüger
Keyword(s):  
Mechanical Properties ◽  
Iron Ore ◽  
Concrete Block ◽  
Morphological Properties ◽  
Iron Ore Tailings ◽  
Physical Chemical

This paper studies the technological feasibility of using iron ore tailings as additives in cement pavers for the optimization of the mechanical properties and color modulation.Thus, to study the physical, chemical, optical and morphological properties of the tailings, they were characterized for the composition, mineralogy and granulometry. To optimize the procedure of preparing iron ore tailings as additives in the production of new concrete pavers and to determine their effects on the properties of pavers they, were added in ratios of 0% to 50% in substitution of traditional aggregates. The pavers were characterized for hermeticity and mechanical properties.

scholarly journals Mechanical properties of sintered ceramsite from iron ore tailings affected by two-region structure

2020 ◽  
Vol 240 ◽  
pp. 117919
Author(s):  
Xiaoguang Li ◽  
Panqi Wang ◽  
Jinyi Qin ◽  
Yunxiao Liu ◽  
Yaan Qu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Iron Ore ◽  
Iron Ore Tailings

Fabrication of Baking-free Bricks from Iron Ore Tailings

2020 ◽  
Vol 13 ◽  
Author(s):  
H. J. Chen ◽  
Zi Wang ◽  
Lizhai Pei ◽  
Z. Y. Xue ◽  
C. H. Yu ◽  
...  
Keyword(s):  
Compressive Strength ◽  
Iron Ore ◽  
Raw Materials ◽  
X Ray Diffraction ◽  
Safety Hazard ◽  
Xrd Pattern ◽  
X Ray ◽  
Iron Ore Tailings ◽  
Brick Powder ◽  
Micro Morphology

Aims: The aim is to prepare baking-free bricks using iron ore tailings as the main raw materials. Objective: Iron ore tailings have increased dramatically in recent decades. The storage of the iron ore tailings has potential environmental and safety hazard. Therefore, it is urgent to use the tailings to produce valuable products. Objective: The objective of the research is to treat the tailings by preparing the baking-free bricks. Method: The phases and micro-morphology of the baking-free bricks have been investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The optimal components and preparation parameters of the baking-free bricks were determined by controlling the ratio of the raw materials and forming pressure. The physical properties of the baking-free bricks including compressive strength and density have been analyzed by controlling the forming pressure and curing time. Result: The optimal components of the baking-free bricks is 65wt.% tailings, 5wt.% titanium gypsum, 17wt.% slag, 5wt. Conclusion: Baking-free bricks have been successfully prepared from the iron ore tailings adding a small amount of cementing materials including titanium gypsum, slag, acetylene sludge and waste brick powder. Other: The XRD pattern and SEM observation show that 28 d tailing bricks are mainly composed of irregular particles and a large number of ettringite (Aft) nanorods. The analyzed results revealed that the formed irregular particles and Aft nanorods contribute to the improvement of compressive strength and compactness of the tailing bricks.

scholarly journals Influence of Addition Contents of Iron Ore Tailings on Structural Mortar

2021 ◽  
Vol 11 (1) ◽  
pp. 74
Author(s):  
Nara Linhares Borges de Castro ◽  
Bruna Silva Almada ◽  
Abner Araújo Fajardo ◽  
Carlos Augusto Oliveira ◽  
White José dos Santos
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Physical Properties ◽  
Open Porosity ◽  
Iron Ore ◽  
Cementitious Composites ◽  
Carbonation Depth ◽  
Flexural Tensile Strength ◽  
Iron Ore Tailings

This study discusses and analyzes an alternative of IOT reuse as addition in structural mortars, evaluating the influence of IOT addition contents. The material was physically and chemically characterized. Structural mortars were molded with 10%, 20%, 30% and 40% of addition of IOT in relation to cement mass. We investigate physical properties, mechanical indicators, durability indicators and microstructure. The tailings are composed of predominantly quartz, hematite and goethite, and no components were found that could compromise the cementitious composites. The addition of IOT provided a tendency to reduce open porosity. The addition of 30% IOT was the most efficient in closing pores. All addition contents led to the maintenance or gains in mechanical properties, and a 10% gain in flexural tensile strength was observed for the addition of 10% IOT. The addition of 40% IOT promoted a 14% gain in compressive strength and maintenance of flexural tensile strength. This addition content evidences that the carbonation depth was not significantly affected. Based on the results, the addition percentages of 30-40% are interesting as to the analyzed properties.

Characterization and Assessment of Iron Ore Tailings as Raw Materials for Construction Industries

2019 ◽  
pp. 1-16
Keyword(s):  
Thermal Stability ◽  
Chemical Composition ◽  
Iron Ore ◽  
Raw Materials ◽  
Experimental Program ◽  
X Ray Diffraction ◽  
Mineralogical Characterization ◽  
Iron Ore Tailings ◽  
Five Elements ◽  
Leaching Behaviour

This chapter deals with the characterization and assessment of iron ore tailings (IOT) as raw materials for the construction industry. This chapter specifies the production process of iron ore and generation of waste material followed by listing the nature and prospective issues of IOT. Methods of IOT characterization are explained through five elements, which are chemical composition, leaching behavior, thermal stability, mineralogical characterization, and morphology. The experimental program and research results of this study are explained in six subtitles, namely chemical composition, leaching behaviour, thermal stability, x-ray diffraction pattern, Fourier transform infrared spectroscopy (FTIR), and field emission scanning electron microscopy (FESEM/EDX). Results revealed that the IOT materials are suitable for use in construction and building industries due to their substantial silica and alumina contents and could possibly be used to fabricate paving blocks, sand-crete blocks, mud blocks, geopolymer bricks, and ceramic floor tiles.

Sign in / Sign up

Export Citation Format

Share Document