Results 71 to 80 of about 875 (170)

Chloride induced corrosion behaviour of mild steel rebars: A case study of calcined Clay Pozzolan containing concrete

Scientific African
The partial replacement of 5 – 30 % by mass of ordinary Portland cement with clay pozzolana in concrete, gives impressive chemical characteristics to the resulting material.
Lucas Nana Wiredu Damoah, Richard Nii Ayitey Akoto, Bernard Kwame Mussey, Yaw Delali Bensah   +3 more
doaj   +1 more source

Properties and durability of metakaolin blended cements: mortar and concrete

Materiales de Construccion, 2010
This article explores the effect of metakaolin, a pozzolan, on concrete performance. Compressive and splitting tensile strength were found for specimens cured for up to 360 and 90 days, respectively.
Rafik Abbas, Salah A. Abo-El-Enein, El-Sayed Ezzat   +2 more
doaj   +1 more source

Recycling of geosourced materials through geopolymerization: Towards sustainable and high-performance earth bricks for resilient construction

Next Materials
The construction sector consumes about 40 % of global energy and produces 36 % of CO₂ emissions, highlighting the urgent need for low-carbon alternatives.
Mohamed Char, Amine Tilioua
doaj   +1 more source

Palm Ash as a Pozzolanic Material for Portland Cement Pastes

To Chemistry Journal, 2019
The effect of the substitution of palm ash (PA) on the physico-chemical and mechanical properties of Portland cement pastes (OPC) was clearly evaluated. Results showed that as the PA content increased, the fineness as well as the heat of hydration of the whole mix increased too.
Hassan Darwish, M. R. Abo El-Suoud
openaire   +2 more sources

Enhancing concrete sustainability: use of ground glass pozzolans as a supplementary cementitious material in low carbon concrete.

Revista ALCONPAT
This review summarizes the availability and processing of glass waste and highlights its impact on the fresh and hardened properties of concrete. Concrete industry is increasingly seeking sustainable supplementary cementitious materials (SCMs) to ...
Prasad Rangaraju
doaj   +1 more source

Effect of dose and types of the water reducing admixtures and superplasticizers on concrete strength and durability behaviour: a review

Journal of Civil Engineering and Management
As one of the concrete admixtures, water reducing admixtures and superplasticizers are usually used to reduce the mixing water volume and improve the performance of the harden concrete while maintaining better workability of the fresh concrete. However,
Xiao-Hui Wang, Zhi-Chao Fang, Li Zheng
doaj   +1 more source

State of the Art: Process of Pozzolan Formation from Ash and its Applications

Revista Ingeniería de Construcción, 2020
A brief presentation is made on the problem of fly ash from sugar production, which can be transformed into pozzolan through physical, thermal, chemical or mixed activation, and then used as a chemical corrector and additive for the production of ...
H. Gallego, E. Toro, R. Rojas
doaj   +2 more sources

PREPARATION OF POZZOLAN WITH A RAW CLAY MATERIAL FROM BURKINA FASO / PREPARATION D’UNE POUZZOLANE A BASE D’UNE MATIERE PREMIERE ARGILEUSE DU BURKINA FASO

Scientific Study & Research: Chemistry & Chemical Engineering, Biotechnology, Food Industry, 2016
A raw clay material from Burkina Faso has been characterized for pozzolan elaboration. The analysis showed that SiO2 (45.91 wt. %), Al2O3 (28.29 wt. %) and Fe2O3 (9.75 wt. %) are the main oxides and kaolinite (71 wt. %) is the principle mineral.
François Ganon, Adama Yameogo, Brahima Sorgho, Lamine Zerbo, Mohamed Seynou, Younoussa Millogo, Raguilnaba Ouedraogo   +6 more
doaj  

Evaluation of zeolitized and vitreous tuffs located in the province of Holguín for use as a natural pozzolan in construction

Ciencia & Futuro, 2011
This work involves the evaluation of vitreous and zeolitized tuff present in the ore bodies of Sagua de Tánamo, Guaramanao, Caimanes and San Andrés, based on chemical and granulometric characterizations and flexotraction and compression resistance of ...
Yunier Pérez-Rodríguez
doaj  

Evaluation of alkali surface modification on pyrolysis chars for use as supplementary cementitious materials in mortars

Developments in the Built Environment
With rising global demand for Portland cement, the construction sector faces pressure to reduce CO2 emissions and meet net-zero targets by 2050. Traditional supplementary cementitious materials (SCMs) like ground granulated blast-furnace slag (GGBS) and ...
Kande D.A. Wijesekara, Paul Sargent, David J. Hughes, Christopher J. Ennis   +3 more
doaj   +1 more source