Performance regulation of desulfurized gypsum on solid waste-based road base materials: Hydration characteristics and environmental performance

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 465, P. 140231 - 140231

Published: Feb. 1, 2025

Language: Английский

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Effect of reduced graphene oxide coated sand on mechanical and electrical properties of cementitious composites

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 466, P. 140307 - 140307

Published: Feb. 8, 2025

Language: Английский

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Sustainable clinker-free composites: Effect of mix proportion parameters on hydration and microstructure of steel slag-GBFS-phosphogypsum binder

Construction and Building Materials, Journal Year: 2025, Volume and Issue: 472, P. 140801 - 140801

Published: March 17, 2025

Language: Английский

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Waste-Driven Construction: A State-of-the-Art Review on the Integration of Waste in 3D Printed Concrete in Recent Researches for Sustainable Development

Journal of Building Engineering, Journal Year: 2024, Volume and Issue: 98, P. 111268 - 111268

Published: Nov. 7, 2024

Language: Английский

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Preparation and properties of alkali-activated slag-like powder paste

Journal of Materials Research and Technology, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 1, 2025

Language: Английский

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The positive impact of using water‐soluble synthetic polymers for the consolidation of archaeological stones

Vietnam Journal of Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: April 1, 2025

Abstract It is widely accepted to utilize polymeric substances enhance and consolidate artifacts of artistic historical value for the protection cultural heritage objects. This article aims prepare evaluate some water‐soluble polymers (melamine formaldehyde sulfonate (MFS), urea (UFS), melamine (MUFS) due their chemical flexibility inexpensive manufacturing process (economic aspect), according properties in strengthening archaeological stones such as sandstone limestone. Fourier transforms infrared spectroscopy (FTIR), elemental analysis techniques are used elucidate structure fabricated polymers. The performance characteristics treated samples were evaluated using different namely; scanning electron microscopy (SEM). results reported that gives more satisfactory than limestone specimens because resins penetrate stone particles well, which a prerequisite an effective treatment produces dimensional stability, weather resistance. Overall, synthetic demonstrated similar film‐forming pore‐filling capabilities stones, highlighting potential improve stones’ endurance aesthetic integrity. In particular, containing MFS exhibited best lowest moisture adsorption, highest compressive strength, therefore considered ideal choice consolidation stones.

Language: Английский

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Application of pretreated dealuminated kaolin as a modifier agent for alkali-activated slag cement

Case Studies in Construction Materials, Journal Year: 2024, Volume and Issue: 20, P. e02858 - e02858

Published: Jan. 5, 2024

In Egypt, the alum industry is increasing rapidly, which leads to an increase in waste resulting from this industry, was named dealuminated kaolin (DK). Recycling into building materials presents best solution for its disposal. article, first time, a study conducted investigate possibility of recycling DK before and after suitable activation (FDK) alkali-activated slag (AAS) cement. A new method used activate DK, exposed 1000 °C 2 h presence 20 wt% sodium hydroxide (NaOH) produce amorphous material (FDK). The partially replaced by different ratios (10-30 wt%) (DK) setting compressive strength, total porosity were monitored. Different methods detect effect FDK on hydration products microstructures. results showed that incorporation AAS cement prolonged decreased increased due crystalline phase, low reactivity, silica at expense calcium. Contrarily, inclusion 10% shortened higher calcium silicate hydrate/calcium aluminate hydrate (CSH/CASH) gel formed, dissolution particles formation Na2O. other adverse excessive Na2O delayed condensation process hindered dissolution, as well amount

Language: Английский

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Impacts of nano C-S-H-PCE on durability-related properties of Portland cement composites with high-volume GGBFS

Construction and Building Materials, Journal Year: 2024, Volume and Issue: 449, P. 138547 - 138547

Published: Oct. 1, 2024

Language: Английский

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The role of low-quality calcined clay in enhancing the performance of cement mortar exposed to normal and aggressive media

Scientific Reports, Journal Year: 2024, Volume and Issue: 14(1)

Published: Oct. 11, 2024

This study focuses on the role of low-quality calcined Fanja (FNJ) clay in enhancing behavior cured cement mortar (CM) and its resistivity to chloride sulfuric acid attack. Ordinary Portland was replaced with different quantities (10%, 25%, 35%, 50% by weight) FNJ, which at temperatures (620 °C, 760 900 °C). After 28 days curing, all hardened mortars were immersed 5% for up 12 weeks. Additionally, a rapid permeability test conducted 91-day CM CM-FNJ samples evaluate affinity FNJs retard diffusion into CM. The results showed that containing FNJ900 better physical mechanical properties than control sample, while NFJ760 recorded nearly similar performance as CM-NFJ900. In contrast, CM-FNJ620 mixtures lower those other mixtures. addition pozzolanic reactivity clay, presence hematite strongly contributed increasing through forming calcium ferrosilicate hydrate binding phase, confirmed X-ray diffraction. Moreover, existence increased against attack it acts buffer an acidic medium. Compared CM-FNJ900, CM-FNJ760 is recommended use exhibited higher strength activity index comparable resistance accelerated accompanied energy demand CO2 emission, achieving concept 'sustainability'.

Language: Английский

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Effect of Surface Hydrophobization on the Durability of Concrete with Cement Kiln Dust

Advances in Science and Technology – Research Journal, Journal Year: 2024, Volume and Issue: 18(3), P. 214 - 233

Published: April 20, 2024

The examinations of concrete involved partial substitution cement with kiln dust (CKD) 0, 5, 10, 20 and 30%.The water/cement (w/c) ratio amounted to 0.36.The obtained findings pertaining open porosity, density, volumetric density were found correlate the capillary action absorptivity analyzed types concrete.With maximum addition CKD, i.e. 30%, porosity decreased by 35%.In turn, CKD added in amount 5% resulted a slightly reduced compressive strength, amounting 1.3% 2.1% following 28 days 56 curing, respectively.After days, differences strength greater when additive was supplied higher amounts, 10%, 20%, resulting 6.5%, 13.4%, 22.9% decrease, respectively, spite improvement.In terms flexural splitting tensile strengths, comparable relations noted.As far as frost resistance test results are concerned, mass losses all examined concretes not significant, reaching up 0.5%.The reduction case first three series below 3%.When increased 20% value dynamic modulus elasticity E c,s degree, 8.0% 14.7%, respectively.The hydrophobization effect is best seen CKD-free concrete.After impregnation, loss samples half.With content, effectiveness insignificant.The most favourable observed for oligomer-based preparation A1.

Language: Английский

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