Cement Kiln Dust

Siddique, Rafat

doi:10.1007/978-3-540-74294-4_11

Cited by 16 publications

(7 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Ettringite, which did not appear in the reference sample, can be observed in the observed points of the sample of paste made from C2 clinker cement with the addition of CKD ( Figure 14 ). The similarity to the microstructure of unmodified pastes is due to the similar dust composition of CKD and cement [ 64 , 65 ]. CKD usefulness is backed up also by its cooperation with GGBFS as an alkali activator for materials with latent hydraulic properties [ 66 ].…”

Section: Resultsmentioning

confidence: 99%

Microstructure of CEM II/B-S Pastes Modified with Set Accelerating Admixtures

Pizoń

Łaźniewska-Piekarczyk

2021

Materials

View full text Add to dashboard Cite

The presented paper aims to describe the influence of accelerating admixtures on the properties and microstructure of cement pastes and mortars. Blended slag cement CEM II/B-S containing two different clinkers (differing amounts of siliceous and aluminous phases) and four types of accelerators (calcium nitrate, sodium hydroxide, cement kiln dust, and crystal seeds) were used in research. Compressive strength tests (after 12, 24, 48 h of curing), Scanning Electron Microscope (SEM) observations together with an Energy Dispersive Spectroscopy (EDS) analysis, Mercury Intrusion Porosimetry (MIP) tests, and X-ray diffraction (XRD) analysis were conducted. Results have shown that SEM and EDS examination of the microstructure of cement pastes modified with accelerating admixtures at the observed points did not reveal differences that would be sufficient to explain the changes in compressive strength. Still, the increase in amorphous phase content indicates a faster hydration reaction rate for all pastes modified with accelerating admixture. It is backed up also by lower non-hydrated compounds content. All admixtures accelerate the hydration reaction of calcium silicate phases of cement, but only NaOH and cement kiln dust (CKD) influence the aluminate phase reaction rate. The pore volume is independent of the clinker type, while the pore size distribution is not.

show abstract

Section: Resultsmentioning

confidence: 99%

Microstructure of CEM II/B-S Pastes Modified with Set Accelerating Admixtures

Pizoń

Łaźniewska-Piekarczyk

2021

Materials

View full text Add to dashboard Cite

show abstract

“…However, it differs because it contains more significant levels of alkalis, sulfate, and chloride, which require more effort to manage and reduce dependence on landfill disposal (Table 1). The physical and chemical characteristics of CKD may be affected by several factors; the most important are raw materials and the operation process type, the fuel used, and the dust collection system [9,10]. CKD's typical chemical composition and physical properties are shown in Tables 1 and 2 [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Cement Kiln Dust (CKD): Potential Beneficial Applications and Eco-Sustainable Solutions

2022

View full text Add to dashboard Cite

Over many decades, cement has been the primary component in construction projects and is considered one of the essential industries worldwide. At the same time, it overconsumes natural resources and can negatively impact the environment through a few byproducts, such as carbon dioxide (CO2) and cement kiln dust (CKD). The generated quantity of CKD is estimated to be 15–20% of the produced cement, which means CKD can be induced in hundreds of millions of metric tons synchronously with annual global cement production. Unfortunately, not all materials of CKD are suitable for recycling in cement manufacturing since it contains high levels of alkalis, sulfate, and chloride, leading to excessive concentrations in the final product. Therefore, CKD industrial utilization has become highly recommended in recent research as a potential beneficial application from economic, environmental, and sustainability perspectives. This review paper highlights and discusses the recently conducted research articles that investigate the industrial applications of CKD. The obtained outcomes showed that CKD has physical and chemical properties that make it practical in many fields, such as soil stabilization, concrete mix, chemical treatment, ceramic and brick manufacturing, and mine backfill. They also indicate a lack of studies investigating CKD in mine backfill applications as a partial replacement material for cement due to the high cost of binders, optimization, and sustainability purposes.

show abstract

“…The preheaters raise the temperature of the raw mix, using heat formed by combusting fuel fed from the kiln exhaust. Volatile solid alkalis, sulfates, and chlorides compounds of the cement kiln dust (CKD) are separated by centrifugal forces through a bypass system 4 . CKD is a spin‐off material from the cement production industry.…”

Section: Introductionmentioning

confidence: 99%

“…CKD is a spin‐off material from the cement production industry. It is a fine powder material, having greyish white color resemble to the appearance of Portland cement 4 . The mix is then sent into a rotary kiln where it is sintered (thermo‐chemical combustion process) to produce clinker.…”

Section: Introductionmentioning

confidence: 99%

Flood hazard assessment and characteristics of cement kiln dust in Ain Sukhna industrial area, north‐western part of the Gulf of Suez, Egypt

Redwan

Mahran

Mohamed

et al. 2020

Env Prog and Sustain Energy

View full text Add to dashboard Cite

This study investigated the geochemical and mineralogical characteristics combined with heavy elements concentrations of Cement kiln dust (CKD) in Ain Sukhna industrial area, North‐western part of the Gulf of Suez, Egypt and the influence of flash floods in its stability. Flooding severity is moderate with several water erosional processes. The CKD characterized by very poorly sorted/very fine‐sands to silt. CaO and SiO2 are major components with enrichment of chloride/sulfate ions. High enrichment of Sr, Zn, Pb, Cd, Sb, and Se are related to variations in shale/limestone feeds during cement formation. The threshold effect level exceeds the standard value for Cd, Pb, and Zn at S3 that indicates adverse biological effects. Sylvite, calcite, and halite minerals were dominated. Three main principal components recognized the shale, calcium/magnesium carbonate dissolution, and the scavenging effect of sulfate for heavy elements. Monitoring the CKD leachability and proper management plans are prerequisite for environmental protection in the future.

show abstract

Cement Kiln Dust

Cited by 16 publications

References 29 publications

Microstructure of CEM II/B-S Pastes Modified with Set Accelerating Admixtures

Microstructure of CEM II/B-S Pastes Modified with Set Accelerating Admixtures

Cement Kiln Dust (CKD): Potential Beneficial Applications and Eco-Sustainable Solutions

Flood hazard assessment and characteristics of cement kiln dust in Ain Sukhna industrial area, north‐western part of the Gulf of Suez, Egypt

Contact Info

Product

Resources

About