Results 211 to 220 of about 18,605 (255)

Influence of nano-SiO2 on the strength and microstructure of natural pozzolan based alkali activated concrete

Construction and Building Materials, 2018
Development of alkali-activated binder (AAB) is fast becoming a viable alternative to ordinary portland cement (OPC). However, key engineering properties of such a binder depend strongly on the chemical composition and fineness of the source materials in
M. Ibrahim, M. Johari, M. Maslehuddin, M. Rahman   +3 more
semanticscholar   +1 more source

Alumina-rich pozzolan modification on Portland-limestone cement concrete: Hydration kinetics, formation of hydrates and long-term performance evolution

, 2020
In order to further understand the modification mechanisms of Portland-limestone cement (PLC) concrete by alumina-rich pozzolan (ARP), and therefore achieve the proper use of ARP in PLC, the present work investigates the hydration kinetics, hydration ...
Yunyao Wang, Z. Shui, Leichong Wang, Xu Gao, Yun Huang, Qiulei Song, Kaizhi Liu   +6 more
semanticscholar   +1 more source

High-performance green concrete with high-volume natural pozzolan: Mechanical, carbon emission and cost analysis

Journal of Building Engineering, 2023
Jin-Cheng Liu, M. Hossain, S. Ng, H. Ye
semanticscholar   +1 more source

Effect of natural pozzolan and recycled concrete aggregates on thermal and physico-mechanical characteristics of self-compacting concrete

, 2020
To properly meet the environmental and ecological side the construction of environmentally friendly buildings has become very important and this can be done by recycling demolition waste to replace natural gravel in the construction of concrete mixtures ...
M. Omrane, Mohamed Rabehi
semanticscholar   +1 more source

Evaluation of pozzolanic activity of natural and artificial pozzolans by thermal analysis

Thermochimica Acta, 2004
Abstract In this research, the pozzolanic activity of natural and artificial pozzolan used for preparation of restoration mortars was evaluated. For this purpose, several pastes were prepared, by mixing two artificial pozzolans and a natural one with commercial hydrated lime, in different ratios. The pastes were cured in standard conditions (RH = 98%,
Antonia Moropoulou, Asterios Bakolas, Eleni Aggelakopoulou   +2 more
openaire   +1 more source

Chloride diffusion and chloride-induced corrosion of steel embedded in natural pozzolan-based alkali activated concrete

, 2020
Durability of emerging alkali-activated binder (AAB) widely viewed as alternative to ordinary Portland cement (OPC) is yet to be fully understood particularly when exposed to chloride-contaminated service environment.
M. Ibrahim, M. Kalimur Rahman, M. A. Megat Johari, Muhammad Nasir, Ewebajo Adeoluwa Oladapo   +4 more
semanticscholar   +1 more source

Development of low-cost polypyrrole/sintered pozzolan ultrafiltration membrane and its highly efficient performance for congo red dye removal

, 2020
The development of high performance ultrafiltration membranes using low-cost products and naturally abundant materials has utmost importance for sustainable development and environmental applications.
G. Derouich, S. Alami Younssi, J. Bennazha, J. Cody, M. Ouammou, Mama El Rhazi   +5 more
semanticscholar   +1 more source

Pozzolanic Activity of Diatomaceous Earth

Journal of the American Ceramic Society, 2010
Lime–diatomaceous earth cement pastes were fabricated at room temperature starting with a mixture of diatomaceous earth (DE), lime, and water. The cementing phase, associated with the pozzolanic reaction of the diatom skeletons with lime, was identified as calcium silicate hydrate (C–S–H) gel using X‐ray diffraction, scanning ...
Eva Jud Sierra, Sean A. Miller, Aaron R. Sakulich, Kenneth MacKenzie, Michel W. Barsoum   +4 more
openaire   +1 more source

Preparation of low-cost composite membrane made of polysulfone/polyetherimide ultrafiltration layer and ceramic pozzolan support for dyes removal

Materials Today Communications, 2019
This study concerns the development and characterization of composite ultrafiltration membrane made of polymer blend of polysulfone (PSf) and polyetherimide (PEI) as membrane layer and flat pozzolan support.
S. Benkhaya, B. Achiou, M. Ouammou, J. Bennazha, S. A. Younssi, Souad M’rabet, A. Harfi   +6 more
semanticscholar   +1 more source

Natural pozzolans for concrete

Economic Geology, 1951
Many geologic formations in the United States yield pozzolans or materials which can be converted into pozzolans by grinding and calcination. When properly selected, processed, and used, pozzolans will reduce costs, improve quality of concrete, protect concrete against effects of reaction between aggregate and cement alkalies, and inhibit attack by ...
Richard Childs Mielenz, Kenneth Titsworth Greene, Nicholas Cyril Schieltz   +2 more
openaire   +1 more source