Fly ash and slag

Giergiczny, Z.

doi:10.1016/j.cemconres.2019.105826

Cited by 350 publications

(157 citation statements)

References 109 publications

Supporting

Mentioning

153

Contrasting

Unclassified

Order By: Relevance

“…The formation of a new crystalline reaction phase that still did not occur signified the structural evolution of the C-A-S-H gel, hence the increased composite strength that resulted later. Calcite was formed due to the excessive amount of CaO that reacted with CO 2 , while the magnetite phase took place due to the small amount of Fe contained in the chemical composition of fly ash [33]. The presence of the hydrosodalite phase indicated some geopolymerisation, but with low strength [34].…”

Section: Phase Analysismentioning

confidence: 99%

Strength Development and Elemental Distribution of Dolomite/Fly Ash Geopolymer Composite under Elevated Temperature

et al. 2020

View full text Add to dashboard Cite

A geopolymer has been reckoned as a rising technology with huge potential for application across the globe. Dolomite refers to a material that can be used raw in producing geopolymers. Nevertheless, dolomite has slow strength development due to its low reactivity as a geopolymer. In this study, dolomite/fly ash (DFA) geopolymer composites were produced with dolomite, fly ash, sodium hydroxide, and liquid sodium silicate. A compression test was carried out on DFA geopolymers to determine the strength of the composite, while a synchrotron Micro-Xray Fluorescence (Micro-XRF) test was performed to assess the elemental distribution in the geopolymer composite. The temperature applied in this study generated promising properties of DFA geopolymers, especially in strength, which displayed increments up to 74.48 MPa as the optimum value. Heat seemed to enhance the strength development of DFA geopolymer composites. The elemental distribution analysis revealed exceptional outcomes for the composites, particularly exposure up to 400 °C, which signified the homogeneity of the DFA composites. Temperatures exceeding 400 °C accelerated the strength development, thus increasing the strength of the DFA composites. This appears to be unique because the strength of ordinary Portland Cement (OPC) and other geopolymers composed of other raw materials is typically either maintained or decreases due to increased heat.

show abstract

Section: Phase Analysismentioning

confidence: 99%

Strength Development and Elemental Distribution of Dolomite/Fly Ash Geopolymer Composite under Elevated Temperature

et al. 2020

View full text Add to dashboard Cite

show abstract

“…FA utilization problem is more complicate, because FA accounts for 15% of total ash (Pundinaitė-Barsteigienė et al, 2017). Not all FA may be used because of poor quality (Giergiczny et al, 2019). Collection, transportation and work with FA is more complicate than with bottom ash because of fine particles (Supancic & Obernberger, 2011).…”

Section: Introductionmentioning

confidence: 99%

Stabilization of Clay Powder With Mineral Wool Fly Ash

Zakarka

Mackevičius

Skuodis

et al. 2020

Engineering Structures and Technologies

View full text Add to dashboard Cite

The aim of this article – to determine short term and long term strengthening of clay soil, by strengthening it with fly ash obtained during the production of mineral wool. This article introduces research which is used to determine the optimal ratio of fly ash in cement suspension for strengthening of clay soil. Samples which were investigated in this research work prepared by mixing Portland cement, mineral wool fly ash, clay powder, sand and water. All investigated samples compressive strength after 6 months exceeded 1.7 MPa. It is enough of such strength in geotechnics to conduct strengthening of soil and it is possible to argue that soil is strengthened.

show abstract

“…Additional emission reductions can be achieved through the use of new technologies such as carbon capture and storage (CCS) and low carbon cement replacement components [7]. With this policy and technological prerequisites, a potential reduction in CO 2 emissions of up to 80 % can be achieved [8]. The production of hightech products in the construction industry, taking into account the reduction of environmental pollution, is largely realized through the introduction of effective low-emission (low-carbon) cements and concretes based on them [7].…”

Section: Introductionmentioning

confidence: 99%

“…The use of SCMs in cement production has a positive impact on the economic aspect of production and, crucially, is a significant factor in improving the environment. On the other hand, the use of industrial waste can reduce the consumption of natural raw materials, reduce CO 2 emissions and free up useful soils, which will reduce the risk of man-made disasters and contribute to the energy independence of the national economy [8].…”

Section: Introductionmentioning

confidence: 99%

Sustainable low-carbon binders and concretes

et al. 2020

View full text Add to dashboard Cite

Sustainable development depends on a consistency of interests, social, ecological and economic, and that the interests are evaluated in a balanced manner. In order to reduce CO2 emissions, the conception of decreasing clinker factor and increasing the role of supplementary cementitious materials (SCMs) in the cementitious materials has high economical and environmental efficiency. The performance of clinkerefficient blended cements with supplementary cementitious materials were examined. The influence of superfine zeolite with increased surface energy on the physical and chemical properties of low-carbon blended cements is shown. Increasing the dispersion of cementitious materials contributes to the growth of their strength activity index due to compaction of cement matrix and pozzolanic reactions in unclincker part. In consequence of the early structure formation and the directed formation of the microstructure of the cement matrix is solving the problem of obtaining clinker-efficient concretes. Shown that low-carbon blended cements with high volume of SCMs are suitable, in principle, for producing structural concretes.

show abstract

Fly ash and slag

Cited by 350 publications

References 109 publications

Strength Development and Elemental Distribution of Dolomite/Fly Ash Geopolymer Composite under Elevated Temperature

Strength Development and Elemental Distribution of Dolomite/Fly Ash Geopolymer Composite under Elevated Temperature

Stabilization of Clay Powder With Mineral Wool Fly Ash

Sustainable low-carbon binders and concretes

Contact Info

Product

Resources

About