Utility assessment of biomass fly-ash for production of concrete products

doi:10.4467/2353737xct.17.135.6886

Cited by 3 publications

(2 citation statements)

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“…Biofuel fly ash in a cement mixture lowers the rate of hydration [29] and thus protects concrete from thermal cracks and stress [30]. Wang et al [5,13,24] analysed the impact of the amount of BFA added on the properties of cementitious pastes, the mechanical strength of the specimens, and the durability of concrete.…”

Section: Introductionmentioning

confidence: 99%

The Impact of High-Alkali Biofuel Fly Ash on the Sustainability Parameters of Concrete

Nagrockienė,

Pundienė,

Kanapeckienė

et al. 2023

Buildings

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The results of this research show that high-alkali biofuel fly ash (BFA) had a significant influence on the mechanical characteristics, microstructure, porosity, freezing–thawing cycle resistance, and ASR resistance of cementitious materials. Different amounts of BFA (varying from 0 to 30%) were used as a substitute for cement in concrete mixes. The impact of substituting cement with BFA on the cement hydration products was analysed. Slump behaviour, mechanical properties, water absorption, porosity, freeze–thaw cycles, and ASR resistance were studied. The analysis of the mechanical and physical characteristics of the developed sustainable concrete revealed that a better structure, higher compressive and flexural strength and density values, and better freeze–thaw and ASR resistance as well as lower water absorption values were achieved when as much as fifteen percent of cement was substituted with high-alkali BFA. The calculations indicate that the substitution of cement with different quantities of high-alkalinity BFA (from 0% to 30% BFA) increased the SiO2/CaO ratio from 0.32 to 0.51 and the Na2O + K2O/CaO ratio from 0.02 to 0.067 in the composition. An evident higher quantity of the hydration products, reflected in the reduction of porosity by up to 27%, the improvement in compressive strength by up to 19.3%, and the calculated freeze–thaw resistance value of up to 51.50%, was observed when the Na2O + K2O/CaO ratio did not exceed 0.044. The ASR resistance of the concrete improved with the increase in the Na2O + K2O/CaO ratio. This study shows that BFA with high alkalinity is beneficial in the development of sustainable building materials.

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Section: Introductionmentioning

confidence: 99%

The Impact of High-Alkali Biofuel Fly Ash on the Sustainability Parameters of Concrete

Nagrockienė,

Pundienė,

Kanapeckienė

et al. 2023

Buildings

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“…Previous works on this subject by the authors were centered around assessing the influence of locally acquired biomass fly ash on cement composites [38], comparing it with the influence of siliceous fly ash [39] and establishing the possibility of enhancing the properties of cement composites modified with biomass fly ash by utilizing asphalt emulsion [40].…”

Section: Introductionmentioning

confidence: 99%

Influence of Mechanical and Mineralogical Activation of Biomass Fly Ash on the Compressive Strength Development of Cement Mortars

Popławski

Lelusz

2021

Materials

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Biomass combustion is a significant new source of green energy in the European Union. The adequate utilization of byproducts created during that process is a growing challenge for the energy industry. Biomass fly ash could be used in cement composite production after appropriate activation of that material. This study had been conducted to assess the usefulness of mechanical and physical activation methods (grinding and sieving), as well as activation through the addition of active silica in the form of silica fume, as potential methods with which to activate biomass fly ash. Setting time, compressive strength, water absorption and bulk density tests were performed on fresh and hardened mortar. While all activation methods influenced the compressive strength development of cement mortar with fly ash, sieving of the biomass fly ash enhanced the early compressive strength of cement mortar. The use of active silica in the form of silica fume ensured higher compressive strength results than those of control specimens throughout the entire measurement period.

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