Utilization of iron ore tailings as fine aggregate in ultra-high performance concrete

Zhao, Sujing; Fan, Junjiang; Sun, Wei

doi:10.1016/j.conbuildmat.2013.10.019

Cited by 328 publications

(120 citation statements)

References 19 publications

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“…Their review of previous research showed that granite dust concrete exhibits enhanced dense and compact concrete matrix at optimum percentage replacement levels. Zhao et al [19] studied the use of iron ore tailings in ultra-high strength concrete. Their results showed comparable results between the concrete with iron ore tailing less than 40% and the control concrete.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Experimental study of concrete made with granite and iron powders as partial replacement of sand

Ghannam

Najm

Vasconez

2016

Sustainable Materials and Technologies

100

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Granite Powder (GP) and Iron Powder (IP) are industrial byproducts generated from the granite polishing and milling industry in powder form respectively. These byproducts are left largely unused and are hazardous materials to human health because they are airborne and can be easily inhaled. An experimental investigation has been carried out to explore the possibility of using the granite powder and iron powder as a partial replacement of sand in concrete. Twenty cubes and ten beams of concrete with GP and twenty cubes and ten beams of concrete with IP were prepared and tested. The percentages of GP and IP added to replace sand were 5%, 10%, 15%, and 20% of the sand by weight. It was observed that substitution of 10% of sand by weight with granite powder in concrete was the most effective in increasing the compressive and flexural strength compared to other ratios. The test resulted showed that for 10% ratio of GP in concrete, the increase in the compressive strength was about 30% compared to normal concrete.Similar results were also observed for the flexure. It was also observed that substitution of up to 20% of sand by weight with iron powder in concrete resulted in an increase in compressive and flexural strength of the concrete.

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Section: Accepted Manuscriptmentioning

confidence: 99%

Experimental study of concrete made with granite and iron powders as partial replacement of sand

Ghannam

Najm

Vasconez

2016

Sustainable Materials and Technologies

100

View full text Add to dashboard Cite

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“…In their experiments, natural sand was replaced with IOT of up to 100% and obtained strength of 23.4 MPa at 28 days. Zhao et al [11] studied the possibility of using IOT to replace natural aggregate to prepare ultrahigh performance concrete. They reported that 100% replacement of natural aggregate with the tailings significantly decreased the workability and compressive strength of the concrete.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of iron ore tailings as replacement for fine aggregate in concrete

Shettima

Hussin

Ahmad

et al. 2016

Construction and Building Materials

310

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“…Silica fume is an ultra-fine powder collected as a by-product from silicon and ferrosilicon alloy production, and it can improve the packing density and produce more gel products to make the concrete more compact. Moreover, as a widely used by-product in producing concrete and blended cement, fly ash has also been used as one of the raw materials to produce UHPC (Yazıcı et al, 2009;Zhao et al, 2014). Fly ash cannot play the part of silica fume but can partially substitute cement to constitute a ternary binder system.…”

Section: Introductionmentioning

confidence: 99%

Effect of silica fume and fly ash on pore structures of blended pastes at low water to binder ratios

Zhao

Sun

2015

Advances in Cement Research

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Cementitious materials with very low water to binder (w/b) ratios such as ultra-high-performance concrete (UHPC) have been increasingly used, and their superior performance is largely dependent on the improved pore structures.The benefits of incorporating supplementary cementitious materials (SCMs) to prepare these materials have been widely recognised, whereas there is a lack of research to reveal the effect of SCMs on the pore structure. The aim of this study is to investigate the influence of silica fume and fly ash on the pore structures of blended pastes at such low w/b ratios. Two curing regimes, standard moisture curing and steam curing, were adopted and the pore structures were determined by mercury intrusion porosimetry. The results show that the addition of silica fume refined the pore structure regardless of the curing method and age. The addition of fly ash decreased the porosity after 7 d, whereas the critical pore size was almost unaffected by fly ash under standard curing. Compared to 90 d standard curing, steam curing contributed to a decreased porosity for all the pastes and a reduced critical pore size for the reference and fly ash paste. Moreover, the introduction of both SCMs resulted in a similar pore structure to that of the silica fume paste.

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Utilization of iron ore tailings as fine aggregate in ultra-high performance concrete

Cited by 328 publications

References 19 publications

Experimental study of concrete made with granite and iron powders as partial replacement of sand

Experimental study of concrete made with granite and iron powders as partial replacement of sand

Evaluation of iron ore tailings as replacement for fine aggregate in concrete

Effect of silica fume and fly ash on pore structures of blended pastes at low water to binder ratios

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