The use of Egyptian volcanic glass powder as a potential source for improving the properties of alkali-activated fly ash cement

Sustainable Chemistry and Pharmacy, Journal Year: 2024, Volume and Issue: 39, P. 101597 - 101597

Published: May 2, 2024

Language: Английский

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Efficient utilization of waste drilling mud to prepare material stabilized with fly ash/slag based geopolymer for subgrade engineering

Journal of Environmental Management, Journal Year: 2024, Volume and Issue: 373, P. 123600 - 123600

Published: Dec. 5, 2024

Language: Английский

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Mechanical Properties of Recycled Aggregate Concretes Containing Silica Fume and Steel Fibres

Materials, Journal Year: 2021, Volume and Issue: 14(22), P. 7065 - 7065

Published: Nov. 21, 2021

In this study, the impact of steel fibres and Silica Fume (SF) on mechanical properties recycled aggregate concretes made two different types Recycled Coarse Aggregates (RCA) sourced from both low- high-strength were evaluated through conducting 60 compressive strength tests. The RCAs used as replacement levels 50% 100% Natural (NCA). Hook-end SF also in mixtures at optimised 1% 8%, respectively. results showed that addition RCA adversely affected concrete. However, incorporation led to development concretes. most significant improvement terms comparable concrete peak strain with ordinary 28 days was observed case using a combination concretes, especially high Although slightly increased elastic modulus substantial due reinforcement fibre coexistence SF. Moreover, existing models predict non-fibrous fibrous are found underestimate values. changed stress-strain curves for RCA. remarkably improved post-peak ductility aggregates types, low-strength parent model estimate curve fibre-reinforced natural reasonably behaviour fibres-reinforced aggregate.

Language: Английский

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Mechanical Strength of Saline Sandy Soils Stabilized with Alkali-Activated Cements

Sustainability, Journal Year: 2022, Volume and Issue: 14(20), P. 13669 - 13669

Published: Oct. 21, 2022

Saline soils usually cannot satisfy the requirements of engineering projects because their inappropriate geotechnical properties. For this reason, they have always been known as one problematic worldwide. Moreover, lack access to normal water has intensified use saline resources such seawater in many construction and mining projects. Although cement stabilization is frequently used improve properties soils, Portland cement’s usage a binder constrained by its negative consequences, particularly on environment. In line, effects NaCl microstructural mechanical alkali-activated volcanic ash/slag-stabilized sandy soil were investigated study. type, slag replacement, curing time, condition, content strength stabilized examined. addition, analyses, including XRD, FTIR, SEM–EDS mapping tests, performed understand physical chemical interaction chloride ions cements. The results show that can be sustainable alternative for environments. increase sodium (NaCl) up 1 wt.% caused development 244% specimens with 50 100 slag, adding more had no significant effect all conditions. Microstructural investigations showed replacement ash resulted formation C-S-H C-A-S-H gels reduced porosity samples increased strength. Furthermore, surface adsorption encapsulation mechanisms co-occurred containing ash.

Language: Английский

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Geotechnical properties of materials used in landfill clay liner: A critical review

Sadhana, Journal Year: 2023, Volume and Issue: 48(2)

Published: April 11, 2023

Language: Английский

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