Volume 5, Number 2 (spring 2008 2008)                   IJMSE 2008, 5(2): 32-35 | Back to browse issues page


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A. Allahverdi, E. Najafi Kani, S. Esmaeilpoor. EFFECTS OF SILICA MODULUS AND ALKALI CONCENTRATION ON ACTIVATION OF BLAST-FURNACE SLAG. IJMSE. 2008; 5 (2) :32-35
URL: http://ijmse.iust.ac.ir/article-1-135-en.html

Abstract:   (53112 Views)
Abstract: The use of alkali-activated cementitious materials especially over the past decades has significantly been increased. The goal of this research is to investigate the effects of silica modulus and alkali concentration on alkali-activation of blast-furnace slag. In this research, the most important physical characteristics of cementitious systems, i.e. the 28-day compressive strength and final setting time, were studied by changing influencing parameters such as silica modulus, i.e. SiO2/Na2O, (0.44, 0.52, 0.60, and 0.68) and Na2O concentration (4, 6, 8 and 10% by weight of dry binder) at a constant water-to-dry binder ratio of 0.25. Final setting time of the studied systems varies in the range between 55-386 minutes. The obtained results show that systems cured at an atmosphere of more than 95% relative humidity at room temperature exhibit relatively high 28-day compressive strengths up to 107 MPa.
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Type of Study: Research paper |

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