Development of a novel cleaner construction product: Ultra-high performance concrete incorporating lead-zinc tailings

Wang, Xinpeng; Yu, Rui; Shui, Zhonghe; Zhao, Zemin; Song, Qiulei; Yang, Bo; Fan, Dian

doi:10.1016/j.jclepro.2018.06.058

Cited by 130 publications

(29 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the fine particle size of tailings acts as a nucleation site for hydration of cement, further increases the hydration degree of the cement. Wang et al [67] and Zheng et al [32] obtained similar results by using cement paste blended tailings or the same content of quartz, and concluded that the effect of tailings on the whole hydration process was mainly due to the dilution effect.…”

Section: Effect On Hydration Reactionsmentioning

confidence: 79%

“…The authors considered that tailings, which were non-hydraulic, as a replacement of cement restrained the shrinkage; whereas as in cement with tailings substitution, the number of hydration products reduced and the porosity of hardened cement paste increased, thereby promoting the dry shrinkage. For autogenous shrinkage, Wang et al [67] proved that with the increase of cement replacement by tailings, the autogenous shrinkage of concrete decreased to different degree. With tailings replacing 20% of cement, the autogenous shrinkage of concrete was the most.…”

Section: Effect On Hardened Propertiesmentioning

confidence: 99%

“…Effect of tailings on drying shrinkage[32] Autogenous shrinkage of concrete pastes with different content of tailings content[67] …”

mentioning

confidence: 99%

See 2 more Smart Citations

Utilization of tailings in cement and concrete: A review

Gou

Zhou

Then

2019

Science and Engineering of Composite Materials

147

View full text Add to dashboard Cite

One of the advantages of cement and the cement concrete industry in sustainability is the ability to utilize large amounts of industrial solid wastes such as fly ash and ground granulated blast furnace slag. Tailings are solid wastes of the ore beneficiation process in the extractive industry and are available in huge amounts in some countries. This paper reviews the potential utilization of tailings as a replacement for fine aggregates, as supplementary cementitious materials (SCMs) in mortar or concrete, and in the production of cement clinker. It was shown in previous research that while tailings had been used as a replacement for both fine aggregate and cement, the workability of mortar or concrete reduced. Also, at a constant water to cement ratio, the compressive strength of concrete increased with the tailings as fine aggregate. However, the compressive strength of concrete decreased as the replacement content of the tailings as SCMs increased, even whentailings were ground into smaller particles. Not much research has been dedicated to the durability of concrete with tailings, but it is beneficial for heavy metals in tailings to stabilize/solidify in concrete. The clinker can be produced by using the tailings, even if the tailings have a low SiO2 content. As a result, the utilization of tailings in cement and concrete will be good for the environment both in the solid waste processing and virgin materials using in the construction industry.

show abstract

Section: Effect On Hydration Reactionsmentioning

confidence: 79%

Section: Effect On Hardened Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Utilization of tailings in cement and concrete: A review

Gou

Zhou

Then

2019

Science and Engineering of Composite Materials

147

View full text Add to dashboard Cite

show abstract

“…Scholars have done a lot of research on iron tailings concrete. In 2018, Wang [5] Using lead-zinc tailings as a substitute for cement, super-performance concrete is obtained, and the leaching toxicity is lower than the national standard; In 2016, Guo [6] Calcining and grinding are used to stimulate the pozzolanic activity of pyrite flotation tailings, and adding it to concrete can make the concrete have good performance. Mainly focused on: changing the content of iron tailings concrete admixture, the effect of different iron tailings on concrete performance, improving the basic mechanical properties of concrete, and the influence of activated iron tailings powder on concrete performance.…”

Section: Current Research Status Of Iron Tailings Mixing Concretementioning

confidence: 99%

Research progress on the preparation of concrete with large amount of iron tailings

Chi

Liu

et al. 2020

E3S Web Conf.

View full text Add to dashboard Cite

Recently, the use of sustainable materials has gained increasing attention and recognition, especially in the construction industry. As the main component of concrete, ordinary Portland cement (OPC) is undoubtedly one of the most commonly used building materials in the world. However, the manufacture of OPC is accompanied by environmental and ecological problems such as the release of carbon dioxide. According to estimates, about 5%-8% of the world think that carbon dioxide emissions come from the OPC industry, so it is urgent to use fly ash, tailings, slag and other industrial solid waste to produce cement instead of ordinary Portland cement.This article summarizes the achievements of the predecessors and outlines the influence of different iron tailings and iron tailings content on the mechanical properties and durability of concrete.

show abstract

“…These toxic heavy metals pose a great threat to the ecological environment. At present, many lead-zinc mines in China still discharge tailings into tailing ponds, which will cause two very severe problems: one is that the solid tailings and tailing slurry will seriously pollute the soil and water system around the reservoir area, and the other is that tailing ponds will face the risk of a dam break with the accumulation of tailings [4].…”

Section: Introductionmentioning

confidence: 99%

Recycling Lead–Zinc Tailings for Cemented Paste Backfill and Stabilisation of Excessive Metal

Chen

Zhang

et al. 2019

Minerals

View full text Add to dashboard Cite

This study demonstrates the feasibility of recycling lead–zinc tailing (LZT) as a cemented paste backfill (CPB) by considering the mechanical properties and environmental effects, thus providing an approach for safe and environmentally friendly treatment of LZT. First, the mechanical properties of CPB samples were tested. When the cement/tailing ratio was 1:6 and the slurry concentration was 70%, the maximum unconfined compressive strength (UCS) of the CPB cured for 28 days reaching 2.05 MPa, which could ensure safe mining. Then, the metals with pollution potential in the backfill slurry were investigated through static leaching. Finally, after adding immobilisation materials to stabilise excessive metals, the environmental stability of the CPB was demonstrated through dynamic leaching and a toxicity characteristic leaching procedure. The results show that the lead leached from the backfill slurry still exceeds the Chinese standard for groundwater quality (GB/T14848-2017 Class III). The addition of 2 mg/L polyaluminium sulfate (PAS) can further improve the strength of the CPB and maintain the environmental friendliness of the CPB. Therefore, the technology of recovering LZT as a CPB proposed in this study is an effective alternative to deal with LZT, which can help lead–zinc mines meet the requirements of cleaner production.

show abstract

Development of a novel cleaner construction product: Ultra-high performance concrete incorporating lead-zinc tailings

Cited by 130 publications

References 41 publications

Utilization of tailings in cement and concrete: A review

Utilization of tailings in cement and concrete: A review

Research progress on the preparation of concrete with large amount of iron tailings

Recycling Lead–Zinc Tailings for Cemented Paste Backfill and Stabilisation of Excessive Metal

Contact Info

Product

Resources

About