Results 21 to 30 of about 1,825 (209)

Effect of Activated Pozzolan with Ca(OH) 2 and nano-SiO2 on Microstructure and Hydration of High-Volume Natural Pozzolan Paste [PDF]

, 2018
The main aim of this study is to investigate the effect of activated pozzolan on hydration and microstructure of high-volume natural pozzolan paste. Thermal activation of natural pozzolan with Ca(OH)2 has been applied with nano-silica (NS) as activator ...
Rahgozar, Peyman, Rahgozar, Reza, Shakiba, Mohammad, Elahi, Amir Reza   +3 more
core   +1 more source

Thermal Properties of Lightweight Cement–Sand–Natural Pozzolan Moroccan Composites [PDF]

EPJ Web of Conferences
Thermal insulation is a key research topic due to its role in improving passive thermal comfort in buildings and reducing carbon emissions. This study investigates the development of a low-cost, thermally insulating concrete incorporating natural ...
Kichouhi Mohamed, Hoummada Khadija, El Alaiji Rachid, Moussaoui Mohammed Amine, Derfoufi Soufiane   +4 more
doaj   +1 more source

Effects of FeNi3 Nanoparticles and Coal Slag on Mechanical and Durability Properties of Concrete against Acidic Environments

Advances in Civil Engineering, 2023
In recent years, natural pozzolans have been proposed as a way to improve the mechanical and biocompatible properties of concrete. This study investigated the effects of different amounts of nanoparticles, coal slag pozzolan, and their combination on the
Hossein Rezayt Khargerdi, Seyed Mojtaba Movahedifar, Alireza Motavalizadehkakhky, Amin Honarbakhsh, Rahele Zhiani   +4 more
doaj   +1 more source

Effects of the secondary minerals of the natural pozzolans on their pozzolanic activity

Cement and Concrete Research, 2008
Abstract Natural pozzolans have been widely used as substitutes for Portland cement, because of their binding properties. Some of them are natural volcanic rocks which contain secondary minerals such as clays and zeolites corresponding to products of the alteration of the rock.
Habert, Guillaume, Choupay, N., Montel, J.M., Guillaume, D., Escadeillas, Gilles   +4 more
openaire   +3 more sources

Lime-activation of natural pozzolan for use as supplementary cementitious material in concrete

Ain Shams Engineering Journal, 2022
The present work was conducted to examine the beneficial effects of activating natural pozzolan (NP) using hydrated lime (HL) for its efficient utilization in concrete.
Omar S. Baghabra Al-Amoudi, Shamsad Ahmad, Mohammed Maslehuddin, Saad M.S. Khan   +3 more
doaj   +1 more source

Effect of natural pozzolan on concrete durability

Pressacademia, 2017
Sulfate attack and its effects are important from both scientific and industrial viewpoints. It is perceived that cements containing pozzolan have better performance in sulfate solutions, since the pozzolanic reactions reduce the quantity of calcium hydroxide and increase calcium silicate hydrate.
MERİDA, Ahcene, KHARCHİ, Fattoum
openaire   +2 more sources

Natural Pozzolans a Comparative Study: A Review

IOP Conference Series: Materials Science and Engineering, 2020
Abstract Exploitation of Natural Pozzolans (Calcined Clay, Calcined Shale & Metakaolin) as Supplementary Cementitious materials (SCMs) for mortar and concrete has attended goodish observance in last decades. In this content the NP used in vast range in partial substitution of cement in concrete and mortar, and due to its pozzolanic ...
Ashish Shukla, Nakul Gupta, Ankur Gupta, Rajesh Goel, Sanjeev Kumar   +4 more
openaire   +1 more source

The Use of Waste Corn Cob as Aggregate in Geopolymer Mortar

Journal of Architectural Sciences and Applications, 2023
This research aims to investigate the effects of waste corn cob aggregate on the properties of volcanic tuff-based geopolymer mortar. Nevşehir Pozzolan, which is produced as waste during the stone-cutting process, was used as an aluminosilicate source ...
Kübra Ekiz Barış
doaj   +1 more source

A comparative study of physical and chemical properties of different pozzolanic materials used for roller compacted concrete RCC dams

MATEC Web of Conferences, 2017
This paper addresses the feasibility and the efficiency of using Natural Pozzolan and/or Rock flour in Roller Compacted Concrete (RCC) gravity dams. For this purpose, five identical mortar trial mixes were prepared using five different supplementary ...
Husein Malkawi Abdallah I., Shatnawi Ehab, Husein Malkawi Dima A.   +2 more
doaj   +1 more source

Effect of Natural Pozzolan on Carbonation and Chloride Penetration in Sustainable Concrete [PDF]

, 2018
A study on green concrete as well as its durability is essential to promote the sustainable development of the concrete industry. Since the majority of concrete deterioration is connected to corrosion of reinforcement due to carbonation or chloride ...
Pyo Mon, Yu Pyae; Department of Civil Engineering, Yangon Technological University, Yangon, Myanmar, Su Htwe, Khin Su; Department of Civil Engineering, Yangon Technological University, Yangon, Myanmar   +1 more
core   +1 more source