Lime kiln dust as a potential raw material in portland cement manufacturing

Miller, M. Michael; Callaghan, Robert M.

doi:10.3133/ofr20041336

Cited by 12 publications

(7 citation statements)

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“…This by-product results from the production of quick lime known as lime kiln dust (LKD), which is regularly disposed of in landfills worldwide. For instance, in the USA, it is estimated that about 2.5 million metric tonnes of high-calcium LKD is produced annually (Miller et al, 2004). Thus, LKD requires reuse, in order to lessen environmental problems and promote sustainability.…”

Section: Introductionmentioning

confidence: 99%

Developing one-part alkali-activated metakaolin/natural pozzolan binders using lime waste

Kadhim

Sadique

Al-Mufti

et al. 2021

Advances in Cement Research

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Among the several schemes that have been reported to be a satisfactory alternative to Portland cement is Alkali Activated Cement (AAC), which has recently started to gain greater consideration in construction sectors. Conventional two-part alkali activation has many drawbacks, including the activating solution being viscous, problematic and non-user friendly to handle. Thus, this research aims to produce a one-part alkali activated metakaolin/natural pozzolan, by using an earth alkaline source (rich in CaO) from waste material (lime kiln dust), as an activating precursor to break the alumina-silicate crystalline phases. Thermal treatment of materials at two levels of treatment (450 o C and 950 o C), was used as an assisted activation approach. Analytical techniques including X-Ray powder diffraction XRD, Thermogravimetric Analysis TG-DTA, Fourier Transform Infrared Spectroscopy FTIR and Scanning Electron Microscope SEM, were utilised to investigate the performance of the developed materials at a molecular level. Reduction of crystalline peaks as well as the appearance of new wollastonite minerals within the calcined lime kiln dust, contributed to the development of 27 MPa compressive strength after 28 days. The dissolution made through the pozzolanic reaction as well as thermal treatment evidently contributed to transform crystalline to amorphous phases.

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Section: Introductionmentioning

confidence: 99%

Developing one-part alkali-activated metakaolin/natural pozzolan binders using lime waste

Kadhim

Sadique

Al-Mufti

et al. 2021

Advances in Cement Research

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“…LKD is a by-product material of quick lime production process, which is usually disposed of in landfills worldwide. For instance, in the USA, it is estimated that about 2.5 million metric tonnes of high-calcium LKD is produced annually [26]. Thus, LKD must be reused to minimise its environmental impacts, and to meet the sustainability requirements.…”

Section: Introductionmentioning

confidence: 99%

Long-term performance of novel high-calcium one-part alkali-activated cement developed from thermally activated lime kiln dust

Kadhim

Sadique

Al-Mufti

et al. 2020

Journal of Building Engineering

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One-part earth alkaline activated dry cementitious mixture was produced using thermally activated lime kiln dust (LKD) waste material as a source of CaO activator and metakaolin and natural pozzolan as a source of aluminasilicate • The proportion of LKD and metakaolin in the ternary blend and thermal activation of LKD not only increased the reactivity but also induced higher degree of alkali-activation.• Significant increase in the rate of strength development after 28 days of curing and continued until 180 days that reached 51 MPa for increased proportion of 950ºC calcined LKD and metakaolin in the blend was revealed.• Considerable changes in mineralogy and amorphicity were evidently accredited to thermal treatment.

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“…Previous studies [13][14][15][16][17][18][19][20][21] demonstrated that potential industrial by-products for HMA included fly ash and bottom ash, from coal fired power plants. Fly ash can be used as a mineral filler in HMA applications [22].…”

Section: Background and Introductionmentioning

confidence: 99%

“…Previous studies [14,25] showed that LKD can be effectively used as active filler in HMA mixtures and would offer higher sustainability performance in terms of cost saving and resource conservation for future generations. (this is an opinion and unsubstantiated).…”

Section: Background and Introductionmentioning

confidence: 99%

Sustainable utilization of lime kiln dust as active filler in hot mix asphalt with moisture damage resistance

Jitsanigam

Biswas

Compton³

2018

Sustainable Materials and Technologies

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The Australian flexible road pavement network is experiencing a considerable degree of reveling and stripping damage in association with moisture. The next generation of hot mix asphalt (HMA) mixtures in Australia needs to have excellent engineering properties as well as higher resistance to moisture damage. Hydrated lime (HL) with a relatively high content of active lime is used in HMA mixtures to improve engineering properties, and particularly to enhance the resistance of HMA mixture to moisture. HL is currently considered a superior mineral filler to crushed rock baghouse dust but it is commercially produced and relatively expensive. Lime kiln dust (LKD) is an industrial by-product which has hydrated lime HMA filler-like properties with similar fineness and a relatively high content of active lime. The lime components in LKD assists in promoting resistance to the stripping common in siliceous acidic aggregates. This project aims to determine an optimum proportion of LKD in an LKD-asphalt binder mixture, based on the properties of viscoelasticity and aggregate adhesion. Dynamic shear rheometer testing and rolling bottle tests were used to evaluate the properties of the LKD-asphalt binder mixtures with varying LKD content. The test results indicated that a 50% LKD content in the LKD-HMA binder mixture provided superior viscoelasticity properties., an acceptable adhesion of asphalt to aggregates was also observed. Last but not the least, a 'cradle to gate' life cycle assessment was carried out to capture the benefits of the use of LKD by-product. This showed that GHG emissions and embodied energy demand could potentially be reduced by 18.5% and 2.4%, respectively if a 50% LKD asphalt binder by mass mixture was used in the LKD-HMA mix..

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Lime kiln dust as a potential raw material in portland cement manufacturing

Cited by 12 publications

References 0 publications

Developing one-part alkali-activated metakaolin/natural pozzolan binders using lime waste

Developing one-part alkali-activated metakaolin/natural pozzolan binders using lime waste

Long-term performance of novel high-calcium one-part alkali-activated cement developed from thermally activated lime kiln dust

Sustainable utilization of lime kiln dust as active filler in hot mix asphalt with moisture damage resistance

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