Properties of cold bonded quarry dust coarse aggregates and its use in concrete

Thomas, Job; Harilal, B.

doi:10.1016/j.cemconcomp.2015.05.005

Cited by 76 publications

(42 citation statements)

References 24 publications

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“…The production of sintering-free lightweight aggregates (SFLAs) (also known as cold-bonded lightweight aggregates) is widely used to recycle solid wastes by the cold-bonded pelletizing technique [ 17 ], where the choice of raw materials for SFLAs has been extended to various solid wastes in recent years, including waste water treatment sludge [ 18 ], ground granulated blast furnace slag [ 19 ], municipal solid waste incinerator fly ash [ 20 ], and water paper sludge ash [ 21 ]. The widespread research on the production SFLAs using solid wastes may be proposed as a feasible method on the exploration of producing SFLAs using RM, which has been rarely studied.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Physico-Chemical Performance Optimization of Sintering-Free Lightweight Aggregates with High Proportions of Red Mud

et al. 2021

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Sintering-free lightweight aggregates were prepared with high proportions of red mud and a binder material derived from whole solid wastes through rolling granulation at room temperature. The preparation process was optimized by changing the material matching and size parameters of the SFLAs. The physico-chemical performance, including the density, mechanical strength, water absorption, hydration products, heavy metal leaching, and microstructure were evaluated by jointly employing X-ray Fluorescence, X-ray Diffraction, and Inductively Coupled Plasma Optical Emission Spectrometry, Shadow Electron Microscope, etc. The results indicated that the red mud and waste-based binders were highly compatible in the granulation process, with up to 80% red mud being successfully added. The sintering-free lightweight aggregates products at the binder content of 30% and the size coverage of 10–16 mm exhibited a bulk density of 900–1000 kg·m−3, a 28 d cylinder compressive strength of 9.2–11.3 MPa, and water absorption of less than 10%. Owing to the formation of important hydration products, ettringite, the heavy metal leaching of the sintering-free lightweight aggregates was also proven to be environmentally acceptable. This work provides a promising pathway to prepare low-cost, high-strength, and green lightweight aggregates through the large-scale utilization of solid waste red mud.

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Section: Introductionmentioning

confidence: 99%

Preparation and Physico-Chemical Performance Optimization of Sintering-Free Lightweight Aggregates with High Proportions of Red Mud

et al. 2021

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“…On the other hand, the construction industry has been of extreme importance for the development of the modern economy and with it, the demand for aggregates to supply the demand in the last decade had a big growth 9,10 .…”

Section: Introductionmentioning

confidence: 99%

“…The handling and incorrect disposal of this residue can generate serious environmental problems, and its accumulation and dispersion directly contaminate the soil and surface waters, and may even deteriorate groundwater through the production of drainage 10 . Due to the fact that there is no commercialization and the commercial value involved is very low, this residue is often stored in the quarries, causing impacts such as air pollution due to the presence of particulate matter, pollution of water bodies caused by drainage of fine materials and also visual pollution of the site 20,9,21 .…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Mechanical Properties of Sealing Mortar with Partial Replacement of Portland Cement by Stone Crusher Waste

et al. 2019

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Civil construction is one segment responsible for major environmental and social impacts. Among its raw materials, Portland cement, which is produced by the burning and subsequent grinding of a composition of clays and limestones. This manufacturing process causes great environmental damage, both by the exploitation of deposits and by the process of clinkering (burning of raw materials), which emits a significant amount of CO 2 in the atmosphere. Therefore, there is a need for research on materials that reduce these impacts on the environment and that can be used by civil construction to the partial replacement of cement. Thus, this research had as objective to produce settlement mortar through the partial replacement of the Portland cement by filler powder, in different proportions and to study its mechanical properties. The results show that the partial replacement of the cement by the residue has acceptable behavior in the mortar.

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“…The problem becomes even environmental: 1 kg of cement produced gives an equivalent of 0.9 carbon dioxide tons in atmosphere. There are some ways for reducing the extraction and the consumption of sand, for example by including quarry dust [3][4][5] or fly ash [6,7] in substitution of sand. Furthermore, materials by CDW could be used to avoid the use of aggregates.…”

Section: Introductionmentioning

confidence: 99%

Fracture properties of green mortars with recycled sand

Restuccia

2019

Frattura Ed Integrità Strutturale

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Urbanisation is consuming huge amounts of sand, being the basic element of concrete and glass, two of the most popular construction materials. Unfortunately, sand mining is causing environmental damage and drastically reducing the amount of raw resources. The main topic of this research is to investigate the use of Construction and Demolition waste finer fractionnamely recycled sand-to totally replace the standard one into traditional mortars. From the analysis of the mechanical characterization of specimens, it is possible to state that recycled sand could represent a new resource for green and sustainable mortars.

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Properties of cold bonded quarry dust coarse aggregates and its use in concrete

Cited by 76 publications

References 24 publications

Preparation and Physico-Chemical Performance Optimization of Sintering-Free Lightweight Aggregates with High Proportions of Red Mud

Preparation and Physico-Chemical Performance Optimization of Sintering-Free Lightweight Aggregates with High Proportions of Red Mud

Evaluation of Mechanical Properties of Sealing Mortar with Partial Replacement of Portland Cement by Stone Crusher Waste

Fracture properties of green mortars with recycled sand

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