A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Physico-mechanical and microstructural properties of rehydrated blended cement pastes
Highlights Properties of blended cement pastes exposed to temperature up to 1200°C and after their rehydration were studied. The addition of slag or fly ash improved the compressive strength of cement paste after heating. The strengths of rehydrated cement pastes were lower than of dehydrated pastes. The direct conjunction between the strength of rehydrated cement pastes and their brownmillerite (C4AF) content was observed.
Abstract This study aims to investigate the effect of high temperatures of up to 1200°C and rehydration on the mechanical properties, microstructure and phase composition of blended cement pastes prepared from Portland cement (PC), granulated blast furnace slag (GBFS), high-temperature fly ash (FA) and ground limestone (GL). It has been found that the heating process induces a reduction in bulk density, flexural and compressive strength. The proportion of pores with a diameter higher than 0.1μm increases with increasing temperature. The addition of GBFS or FA improves the strength properties of dehydrated cement paste (DCP), but this effect was not observed after rehydration. Cement paste with added GBFS has the best resistivity to high temperatures, but after rehydration, GL cement paste shows better mechanical properties.
Physico-mechanical and microstructural properties of rehydrated blended cement pastes
Highlights Properties of blended cement pastes exposed to temperature up to 1200°C and after their rehydration were studied. The addition of slag or fly ash improved the compressive strength of cement paste after heating. The strengths of rehydrated cement pastes were lower than of dehydrated pastes. The direct conjunction between the strength of rehydrated cement pastes and their brownmillerite (C4AF) content was observed.
Abstract This study aims to investigate the effect of high temperatures of up to 1200°C and rehydration on the mechanical properties, microstructure and phase composition of blended cement pastes prepared from Portland cement (PC), granulated blast furnace slag (GBFS), high-temperature fly ash (FA) and ground limestone (GL). It has been found that the heating process induces a reduction in bulk density, flexural and compressive strength. The proportion of pores with a diameter higher than 0.1μm increases with increasing temperature. The addition of GBFS or FA improves the strength properties of dehydrated cement paste (DCP), but this effect was not observed after rehydration. Cement paste with added GBFS has the best resistivity to high temperatures, but after rehydration, GL cement paste shows better mechanical properties.
Physico-mechanical and microstructural properties of rehydrated blended cement pastes
Vyšvařil, Martin (author) / Bayer, Patrik (author) / Chromá, Markéta (author) / Rovnaníková, Pavla (author)
Construction and Building Materials ; 54 ; 413-420
2013-12-06
8 pages
Article (Journal)
Electronic Resource
English
Physico-mechanical and microstructural properties of rehydrated blended cement pastes
| Online Contents | 2014
Physico-mechanical and microstructural properties of rehydrated blended cement pastes
| British Library Online Contents | 2014
| British Library Conference Proceedings | 2001