Preparation of eco-friendly construction bricks from hematite tailings

Chen, Yongliang; Zhang, Yimin; Chen, Tiejun; Zhao, Yunliang; Bao, Shenxu

doi:10.1016/j.conbuildmat.2010.11.025

Cited by 246 publications

(96 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Due to this ability, bricks have become a popular material in waste management research worldwide and several studies have demonstrated that clay-based bricks and tiles can successfully accommodate waste types, such as incineration ashes, mine tailings and dredged harbour sediments (Chen et al, 2011;Kasuriya et al, 2008;Mezencevova et al, 2012;Roy et al, 2007;Zhang et al, 2011). The benefits of waste addition in bricks, which are most often mentioned in the literature, are: 1) conservation of natural resources, e.g.…”

Section: Introductionmentioning

confidence: 99%

“…Due to serious environmental hazards, such as heavy metal pollution, the tailings disposals often need continuous surveillance even after the mining operations have terminated (Elberling et al, 2002;Ramirez-Llodra et al, 2015). Several authors have investigated the potential for using residues from the mineral resource industry as secondary raw materials for the production of clay-based ceramics (Chen et al, 2011;Menezes et al, 2005;Roy et al, 2007;Segadães et al, 2005;Torres et al, 2009). Benefits such as increased durability (Torres et al, 2009), reduced firing temperature (Segadães et al, 2005) and lowered total cost (Roy et al, 2007) were reported for the produced ceramics.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Screening of heavy metal containing waste types for use as raw material in Arctic clay-based bricks

Belmonte

Ottosen

Kirkelund

et al. 2016

Environ Sci Pollut Res

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Screening of heavy metal containing waste types for use as raw material in Arctic clay-based bricks

Belmonte

Ottosen

Kirkelund

et al. 2016

Environ Sci Pollut Res

View full text Add to dashboard Cite

“…Meanwhile, the optimum hydrothermal curing temperature is 60°C. At the prescribed hydrothermal treatment temperature, the heat provided by the hydrothermal treatment is adequate to accelerate the dissolution of silica and alumina present in fly ash, promoting both the geopolymerization and pozzolanic reaction in the geopolymer concrete, hence, highest compressive strength could be achieved (Chen et al, 2011;Zhao et al, 2009).…”

Section: Discussionmentioning

confidence: 99%

The High Volume Reuse of Hybrid Biomass Ash as a Primary Binder in Cementless Mortar Block

Cheah

Shazea

Ahmad

et al. 2014

American Journal of Applied Sciences

View full text Add to dashboard Cite

High Calcium Wood Ash (HCWA) and Pulverised Fuel Ash (PFA) are by-products from the wood biomass and coal energy production which are produced in large quantity with combined annual production of 500 million tonnes. This poses a serious problem for disposal of the waste material especially at places where land is scarce. The prescribed study was aimed to examine the mineralogical phases and their respective amount present in the industrial wastes which governs the hydration mechanism towards self-sustained solidification of the ashes when used in combination. Besides, the influence of various forming pressure and hydrothermal treatment temperature on mechanical strength performance of HCWA-PFA cementless mortar blocks was also examined. In the study, the mechanical strength of the HCWA-PFA cementless mortar block produced using various forming pressure and hydrothermal treatment temperature was assessed in terms of compressive strength and dynamic modulus. The results of the study are indicative that HCWA is rich in calcium oxide and potassium oxide content. This enables the hybridization of HCWA with the amorphous silica and alumina rich PFA to form a solid geopolymer binder matrix for fabrication of cementless mortar block. Throughout the study, dimensionally and mechanically stable HCWA-PFA geopolymer mortar blocks were successfully produced by press forming and hydrothermal treatment method. Based on statistical analysis, the hydrothermal treatment temperature has a statistically insignificant effect on the mechanical strength of the HCWA-PFA cementless mortar blocks. The dominant factor which governs the mechanical strength of the HCWA-PFA cementless mortar blocks was found to be the hydraulic forming pressure. Moreover, it was found that hybridized HCWA-PFA can be recycled as the sole binder for fabrication of cementless concrete block which is a useful construction material.

show abstract

“…This assertion is frequently based on the assumption that waste can cause environmental damage, so reducing it is a good thing (Chen et al 2011), or that a reduced energy requirement, either in the extraction or processing of materials, is good for the environment (Ahmari and Zhang 2012). In many cases, these are reasonable assumptions, and the latter even hints at life cycle thinking, even if not validated by life cycle assessment.…”

Section: Discussionmentioning

confidence: 99%

A framework for including enhanced exposure to naturally occurring radioactive materials (NORM) in LCA

Joyce

Goronovski

Tkaczyk

et al. 2016

Int J Life Cycle Assess

View full text Add to dashboard Cite

Purpose Despite advances in the development of impact categories for ionising radiation, the focus on artificial radionuclides produced in the nuclear fuel cycle means that the potential impacts resulting from increased exposure to naturally occurring radioactive materials (NORM) are still only covered to a limited degree in life cycle assessment (LCA). Here, we present a potential framework for the inclusion of the exposure routes and impact pathways particular to NORM in LCA. Methods We assess the potential magnitude of enhanced NORM exposure, particularly in light of the potential use of NORM residues in building materials, and set out the potential exposure routes that may exist. We then assess the current state of the art, in terms of available fate, exposure and damage models, both within and outside of the LCA sphere. Finally, these exposure routes and modelling techniques are combined in order to lay out a potential framework for NORM assessment in LCA, both in terms of impact on humans and ecosystems. Results and discussion Increased exposure to NORM radionuclides can result either from their release to the environment or their proximity to humans as they reside in stockpiles, landfills or products. The exposure route via products is considered to be increasingly significant in light of current attempts to incorporate technologically enhanced NORMs (TENORM) including bauxite residue into building materials, by groups such as the ETN-MSCA REDMUD project. Impact assessment models for NORM exposure are therefore required to avoid potential burden shifting in the assessment of such TENORM products. Models describing the fate of environmental releases, the exhalation of radon from building products and the shielding effects on landfills/stockpiles are required to assess potential exposure. Subsequently, models relating exposure to radiation sources and the effective internal and external dose received by receptors are required. Finally, an assessment of the damage caused to the receptors is desirable. Conclusions A sufficient suite of currently existing and internationally recognised models exist that can, with varying degrees of modification, form the building blocks of a comprehensive NORM characterisation method for LCA. The challenge ahead lies in consolidating these models, from disparate fields, into a coherent and generally applicable method for the assessment of enhanced NORM exposure in LCA.

show abstract

Preparation of eco-friendly construction bricks from hematite tailings

Cited by 246 publications

References 16 publications

Screening of heavy metal containing waste types for use as raw material in Arctic clay-based bricks

Screening of heavy metal containing waste types for use as raw material in Arctic clay-based bricks

The High Volume Reuse of Hybrid Biomass Ash as a Primary Binder in Cementless Mortar Block

A framework for including enhanced exposure to naturally occurring radioactive materials (NORM) in LCA

Contact Info

Product

Resources

About