A study to investigate the compressive strength and flow of alkali-activated slag mortar using two curing regimes
Elsebaei, M., Mavroulidou, M., Centeno, M., Shamass, R., Rispoli, O., Micheal, A. (2025). A study to investigate the compressive strength and flow of alkali-activated slag mortar using two curing regimes. EKB Journal Management System, 16(16), 1-1. doi: 10.1088/1755-1315/1530/1/012025
Mostafa Elsebaei; Maria Mavroulidou; Maria Centeno; Rabee Shamass; Ottavia Rispoli; Amany Micheal. "A study to investigate the compressive strength and flow of alkali-activated slag mortar using two curing regimes". EKB Journal Management System, 16, 16, 2025, 1-1. doi: 10.1088/1755-1315/1530/1/012025
Elsebaei, M., Mavroulidou, M., Centeno, M., Shamass, R., Rispoli, O., Micheal, A. (2025). 'A study to investigate the compressive strength and flow of alkali-activated slag mortar using two curing regimes', EKB Journal Management System, 16(16), pp. 1-1. doi: 10.1088/1755-1315/1530/1/012025
Elsebaei, M., Mavroulidou, M., Centeno, M., Shamass, R., Rispoli, O., Micheal, A. A study to investigate the compressive strength and flow of alkali-activated slag mortar using two curing regimes. EKB Journal Management System, 2025; 16(16): 1-1. doi: 10.1088/1755-1315/1530/1/012025

A study to investigate the compressive strength and flow of alkali-activated slag mortar using two curing regimes

The International Conference on Civil and Architecture Engineering
Volume 16, Issue 16, May 2025, Pages 1-1    PDF (223.12 K)
DOI: 10.1088/1755-1315/1530/1/012025
Authors
Mostafa Elsebaei1; Maria Mavroulidou2; Maria Centeno3; Rabee Shamass4; Ottavia Rispoli5; Amany Micheal6
1Assistant Lecturer at The British University in Egypt, Post Graduate Student at London South Bank University
2Professor A, Civil and Building Services Engineering; London South Bank University
3Associate Professor, Chemical and Energy Engineering; London South Bank University
4Senior Lecturer in Structural Engineering; Brunel University
5Senior Lecturer in Civil Engineering; London South Bank University;
6Professor, Post-graduate Program Director, The British University in Egypt;
Abstract
This research investigates the potential for producing more environmentally friendly
mortars by replacing cement with Ground Granulated Blast Furnace Slag (GGBS). The study
examines the influence of key factors on the properties of GGBS-based mortar activated using
sodium silicate (SS) and sodium hydroxide (NaOH). Specifically, it explores: (1) the effect of
different SS types—base and neutral type; (2) the sodium oxide (Na₂O) content, derived from
both activators, with concentrations of 12% and 15%; (3) the impact of curing methods,
including ambient temperature curing and full water immersion (submerged); and (4) the role
of the water-to-binder (w/b) ratio, assessed at 43% and 48%. The performance of GGBS
mortars was evaluated in terms of compressive strength and flowability. The results showed no
significant difference between the two SS types; however, the base SS was recommended due
to its lower NaOH content to reach the same Na₂O content, which leads to reduced generated
heat when preparing the solution. Additionally, a 12% Na₂O concentration yielded higher
compressive strength and enhanced flowability. While increasing the w/b ratio improved
flowability, it had a detrimental effect on compressive strength. Furthermore, submerged
curing significantly reduced compressive strength compared to ambient curing.

Keywords
GGBS; Alkali Activation; Curing Regime; Na2O Percentage; Compressive Strength
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