Results 11 to 20 of about 913 (181)

Clays for Low-Carbon Cements: Overview, Progress, and Challenges. [PDF]

Glob Chall
This review provides a critical overview of recent developments of activated clays to function as artificial pozzolans. After a thorough description of the clays that yield good pozzolanic performances, selected examples are given on thermal and mechanical activations. Chiefly, general correlations are extracted from reported data despite its scattered
Koufany I, Santacruz I, De la Torre AG, Rodríguez-Ruiz MD, Aranda MAG.   +4 more
europepmc   +2 more sources

Voids to Cementitious Materials Ratio as a Control for Tensile Strength on CTRB with Natural Pozzolan

Jurnal Teknik Sipil, 2022
Abstrak Posolan alam diklasifikasikan sebagai material tambahan pada campuran Semen (SCMs) karena sifat sementasinya yang jika ditambahkan dalam campuran beton dan semen sebagai bahan aditif berpengaruh positif terhadap campuran.
Joice Elfrida Waani
doaj   +1 more source

Effect of Chemical Additives on Carbon Dioxide in the Sustainable Production of Portland Pozzolanic Cement [PDF]

محیط زیست و مهندسی آب
This research aims to investigate the reduction of CO2 emissions in the cement production process by producing pozzolanic portland cement (PPC) with the characteristics of ordinary portland cement (OPC) using quality-improving chemical additives ...
Aliakbar Derakhshani, Arezoo Ghadi, Seyed ebrahim Vahdat   +2 more
doaj   +1 more source

Influence of thermal activation of natural pozzolan on the mechanical behavior of cement pastes

Journal of Materials and Engineering Structures, 2022
This experimental work focused on the thermal activation of natural pozzolan (NP) from the town of Beni-Saf, in order to improveits reactivity. The present study consists of using natural pozzolan as partial replacement of ordinary Portland cement, with ...
souad MECHEBEK, kada AYED, Ddjamel Eddine KERDAL   +2 more
doaj  

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

Iraqi bentonite as a natural pozzolan for sustainable concrete [PDF]

, 2021
Abstract Iraqi high-calcium bentonite was used for the first time to prepare natural pozzolan. Twenty-four calcination programs were studied. The optimum calcination program is 800°C for 90min. The calcined bentonite meets the requirements of the Iraqi specification of pozzolanic materials.
Amer Abbas Al-Hammood, Qais J. Frayyeh, Waleed A. Abbas   +2 more
openaire   +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

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

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

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