Effect of Waste Concrete Powder Content and Microwave Heating Parameters on the Properties of Porous Alkali-Activated Materials from Coal Gangue

Materials, Год журнала: 2024, Номер 17(22), С. 5670 - 5670

Опубликована: Ноя. 20, 2024

The objective of this research is to fabricate waste-based alkali-activated foams with better properties in a quick time by using energy-efficient techniques such as microwave irradiation. present study reports the effect heating parameters, including and output power, on porous materials (AAMs) that use coal gangue (CG) precursor. effects concrete waste (CW) content (0-20 wt %) performance microstructure CG-based AAMs were investigated. Mechanical, thermal, microstructural investigations conducted characterize obtained materials. experimental results indicate best characteristics achieved when power 800 W 10 min, respectively. prepared adding powder increased stability showed lower bulk density thermal conductivity. When was %, overall performance. At same time, mechanical declined only slightly (~9%). findings work provide basis for further studies improving due physical field fresh mortar without chemical foaming agent while reducing energy consumption production process.

Язык: Английский

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Evaluating the dual role of sea water and metakaolin in the performance, efflorescence mitigation, and phase composition of sodium silicate-activated marble powder

Developments in the Built Environment, Год журнала: 2024, Номер 21, С. 100596 - 100596

Опубликована: Дек. 26, 2024

Язык: Английский

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The Influence of Rice Husk Additives on the Properties of Glass Based—Geopolymer at High Temperatures

Material Design & Processing Communications, Год журнала: 2024, Номер 2024(1)

Опубликована: Янв. 1, 2024

Foaming or porous geopolymers can be utilized in various engineering applications, including heat and acoustic insulations, as well passive fire protection building materials. They are ecofriendly materials, no significant production power is required. In this study, possessing foaming features involving lightweight materials were successfully created through the reaction of sodium hydroxide solution 6 M with powder waste glass MG without/with rice husk (RH) 20 wt.% treated (212, 420, 600 μ m) agent. The effect ash (RHA) sizes RH additives on thermal treatment (volume weight changes, percentage), compressive strength, microstructure (pore content) was assessed. results show swelling (foaming behavior) for MG‐N6, MGB‐N6, MGR212‐N6, MGR600‐N6 at 550°C, unlike MGR420‐N6 formula. Also, a high‐volume change (percentage) paste 650°C noticed. Additionally, behavior (high volume expansion) appeared all thoughtful pastes after 750°C. loss specimens range 10%–27% high percentage changes MGR400‐N6 Low values strength (2.74–14.5 MPa) recorded formulas studied. These synthesized containing powder, resulting from highly recommended, mostly insulation demanding lightweight, porosity, low mechanical properties.

Язык: Английский

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Mechanical activation of metakaolin through milling: Impact on the geopolymerization process

Journal of Non-Crystalline Solids, Год журнала: 2024, Номер 650, С. 123373 - 123373

Опубликована: Дек. 19, 2024

Язык: Английский

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