Effect of Heat Treatment on Properties of Portland Cement Pastes: Determination through Ultra-Microhardness Test

D.C.S. Garcia; Roberto B. Figueiredo; Maria Teresa Paulino Aguilar

doi:10.4028/www.scientific.net/MSF.820.492

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HomeMaterials Science ForumMaterials Science Forum Vol. 820Effect of Heat Treatment on Properties of Portland...

Effect of Heat Treatment on Properties of Portland Cement Pastes: Determination through Ultra-Microhardness Test

Abstract:

The aim of this paper was to investigate the influence of heat treatment on hardness evolution of cement pastes containing silica fume. The specimens were prepared with Ordinary Portland Cement, water/binder ratio of 0,40 and 25% wt. silica fume. The specimens were cast at room temperatures and after 24 hours, they were placed in a furnace for 24 hours, with heat regimes of 100°C, 200°C and 300°C and then submitted to the ultra-microhardness test. The microstructure was analyzed using optical microscopy. The results showed that the silica fume prevents the production of calcium hydroxide and the heat treatment increases the material hardness.

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Periodical:

Materials Science Forum (Volume 820)

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492-496

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.820.492

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Online since:

June 2015

Authors:

D.C.S. Garcia*, Roberto B. Figueiredo, Maria Teresa Paulino Aguilar

Keywords:

Cement Pastes, Heat Treatment, Microhardness

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