Author
M.S. Morsy
Bio: M.S. Morsy is an academic researcher from King Saud University. The author has contributed to research in topics: Metakaolin & Compressive strength. The author has an hindex of 10, co-authored 17 publications receiving 483 citations.
Topics: Metakaolin, Compressive strength, Flexural strength, Mortar, Cement
Papers
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TL;DR: In this paper, the effects of high temperatures up to 800°C on the mechanical properties and microstructure of nano-metakaolin cement mortars were investigated, and it was found that after an initial increase in compressive strength at 250°C for the mortar specimens, the strength decreased considerably at higher temperatures.
160 citations
TL;DR: In this paper, the effect of sodium silicate/sodium hydroxide ratios on the feasibility of geopolymer synthesis at 80°C using fly ash was investigated and the result showed that compressive and flexural strength increases as the curing age increases.
Abstract: Geopolymerization can transform a wide range of waste aluminosilicate materials into building and mining materials with excellent chemical and physical properties. The present experimental study investigates the effect of sodium silicate/sodium hydroxide ratios on the feasibility of geopolymer synthesis at 80 °C using fly ash. The sodium silicate/sodium hydroxide (S/N) ratios 0.5, 1.0, 1.5, 2.0 and 2.5 were studied. The result showed that the compressive and flexural strength increases as the curing age increases. Also, the compressive strength increases as the sodium silicate/sodium hydroxide ratio increases from 0.5 to 1.0 and then decreases. Morphology studies, conducted by SEM analysis of the geopolymer samples, indicated that geopolymers gel had the fly ash particles and pores embedded in a continuous matrix. At S/N = 1 a homogeneous and less porous microstructure was observed.
135 citations
TL;DR: In this paper, the influence of nano metakaolin (NMK) on physical, mechanical and microstructural properties of high volume vermiculite blended white Portland cement (WPC) was presented.
55 citations
TL;DR: In this article, the effect of nano-metakaolin (NMK) addition on hydration characteristics of fly ash (FA) blended cement mortar was experimentally investigated, and the experimental results showed that the compressive and flexural strengths of mortars containing NMK are higher than those of FA blended mortar at 60 days of hydration age.
Abstract: The effect of nano-metakaolin (NMK) addition on hydration characteristics of fly ash (FA) blended cement mortar was experimentally investigated. The amorphous or glassy silica, which is the major component of a pozzolan, reacts with the calcium hydroxide liberated during calcium silicate hydration. It is believable to add FA and NMK particles in order to make high performance concrete. The physico-mechanical properties of FA blended cement mortars made with different percentages of NMK were investigated. The experimental results showed that the compressive and flexural strengths of mortars containing NMK are higher than those of FA blended cement mortar at 60 days of hydration age. It is demonstrated that the nanoparticles enhances strength than FA. In addition, the hydration process was monitored using scanning electron microscopy and thermal gravimetric analysis (TG). The results of these examinations indicate that NMK behaves not only as a filler to improve microstructure, but also as an activator to promote the pozzolanic reaction.
44 citations
TL;DR: In this paper, the authors presented the properties of a cementless mortar developed to produce eco-friendly building material without carbon dioxide emissions and with various beneficial effects, such as the binder used in this mortar was developed by the reaction of inorganic minerals fly ash (FA), lime (L) and activated kaolin clay, which is rich in silica and alumina.
43 citations
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TL;DR: A review of the advances in knowledge provided by research in these areas can be found in this paper, emphasizing the impact of the research on the field and emphasizing the benefits of these advances.
614 citations
TL;DR: In this paper, the authors provide a comprehensive and updated report on the temperature dependency of such parameters as the compressive strength, modulus of elasticity, strength in indirect tension (bending and splitting tests), stress-strain curves and spalling, but the roles played by the water-binder ratio (w/b), aggregate type, supplementary cementitious materials (SCMs) and fibres are investigated as well.
471 citations
TL;DR: In this paper, the authors discussed on the nano materials in concrete and presented on the advantages and benefits to enhance the concrete by utilizing nano materials, which can reduce the formation of micro pores by acting as a filler agent, producing a very dense concrete and automatically reducing the growth of micro pore in the UHPC structures.
338 citations
TL;DR: A comprehensive overview of the previous works carried out on kaolin history, metakaolin sources, production and composition can be found in this article, where the authors also present a survey of the existing works.
337 citations
TL;DR: In this paper, the authors present a review of thermal insulation materials used in the construction industry, focusing on researches utilized of renewable resources and wastes in thermal insulations development, and the light was shed on the composites materials which was developed as a construction material with high thermal insulation capacity.
268 citations