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Browsing Civil Engineering by UP Author "Kovtun, Maxim"
Now showing items 1-8 of 8
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Kovtun, Maxim; Kearsley, Elsabe P.; Shekhovtsova, Julia (Elsevier, 2015-06)This paper presents results of a study on chemical acceleration of a neutral granulated blast-furnace slag activated using sodium carbonate. As strength development of alkali-activated slag cements containing neutral GBFS ...
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Ziolkowski, Mateusz; Kovtun, Maxim (Elsevier, 2018-07)A novel accelerated curing technique – confined-DEC (Direct Electric Curing) – was compared with oven curing. Microstructural investigations revealed that under free drainage conditions non-uniform curing conditions were ...
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Ziolkowski, Mateusz; Kovtun, Maxim (Elsevier, 2017-11)The utilisation of fly ash is a global concern. Under conditions of mass production and rapid turnover in automated plants, a reduction in the curing duration of alkali-activated fly ash based mixtures is sought-after. An ...
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Kovtun, Maxim; Ziolkowski, Mateusz; Shekhovtsova, Julia; Kearsley, Elsabe P. (Elsevier, 2016-10)Utilization of the fly ashes is a major problem in many developing countries and in South Africa only about 7% of the fly ash produced annually by coal-fired power stations, is being utilized. Although, fly ashes can be ...
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Kovtun, Maxim; Kearsley, Elsabe P.; Shekhovtsova, Julia (Thomas Telford, 2015)This paper reports on the results of an investigation into the possibility of producing dry powder alkali-activated slag cements as a ready-to-use product which can be packed in bags and mixed with water to produce a ...
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Shekhovtsova, Julia; Kearsley, Elsabe P.; Kovtun, Maxim (South African Institution of Civil Engineering, 2014-10)In this paper the effect of sodium oxide concentration, the water-to-binder-solids ratio, temperature, and the duration of elevated temperature curing on the compressive strength of alkali-activated fly ash cement pastes ...
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Shekhovtsova, Julia; Kovtun, Maxim; Kearsley, Elsabe P. (Thomas Telford, 2015-08)Short and long-term properties of alkali-activated fly ash concrete namely compressive, flexural and splitting tensile strengths, modulus of elasticity, Poisson’s ratio, early age and drying shrinkage, creep, and ...
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Shekhovtsova, Julia; Kearsley, Elsabe P.; Kovtun, Maxim (Thomas Telford, 2016)This paper reports on core temperature development and initial shrinkage of fly ash cement pastes activated with sodium hydroxide solution at different concentrations during elevated-temperature curing at 60°C. The results ...
Now showing items 1-8 of 8