Results 11 to 20 of about 1,825 (209)

Conception of eco-friendly cement based on natural pozzolan to improve rheological behavior of concrete

Journal of Building Materials and Structures, 2020
The pozzolan of Beni- Saf region (North-West Algeria) is a natural material of volcanic origin with an ability to react with lime in the presence of water and to form compounds with binding properties.
Sabria Malika Mansour, Youcef Ghernouti
doaj   +2 more sources

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

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   +1 more source

Effect of natural pozzolan on strength and temperature distribution of heavyweight concrete at early ages

MATEC Web of Conferences, 2018
The benefits of using mineral additive as a partial replacement for cement in heavyweight concrete are discussed. This paper presents the strength development and temperature distribution of concrete using Class F of natural pozzolan (PU) sourced from ...
Van Lam Tang, Chuc Nguyen Trong, Xuan Hung Ngo, Van Phi Dang, Bulgakov Boris, Bazhenova Sophia   +5 more
doaj   +2 more sources

Improvement of geotechnical properties of silty sand soils using natural pozzolan and lime

International Journal of Geo-Engineering, 2018
In this study the effect of different amounts of lime and natural pozzolan on geotechnical properties of a silty sand soil has been investigated. To do this, 20 treatments were prepared with adding five lime levels of 0, 1, 3, 5 and 7% (by weight) and ...
Nader Abbasi, Masoud Mahdieh
doaj   +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   +3 more sources

Taftan Pozzolan-Based Geopolymer Cement

International Journal of Industrial Engineering and Production Research, 2008
: In recent years, many research works have been done to investigate the possibility of utilizing a broad range of materials as raw materials in the production of geopolymer cements.
A. Allahverdi, K. Mehrpour, E. Najafi Kani   +2 more
doaj   +1 more source

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

Study of Geopolymer Composites Based on Volcanic Ash, Fly Ash, Pozzolan, Metakaolin and Mining Tailing

Buildings, 2022
This work studies the feasibility to employ a combination of volcanic ash (natural waste) with different raw materials in the production of geopolymers: fly ash and mining tailing (considered hazardous solid waste), natural pozzolan, and metakaolin. This
Rossibel Churata, Jonathan Almirón, María Vargas, Danny Tupayachy-Quispe, Jeniffer Torres-Almirón, Yosheff Ortiz-Valdivia, Francisco Velasco   +6 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

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