Materiales de Construcción, Vol 54, No 273 (2004)

Evaluation of concrete mechanical strength through porosity


https://doi.org/10.3989/mc.2004.v54.i273.220

M. Olivares
Dpto. Construcciones Arquitectónicas I. Escuela Técnica Superior de Arquitectura de Sevilla, Spain

J. Lafarga
Dpto. Construcciones Arquitectónicas I. Escuela Técnica Superior de Arquitectura de Sevilla, Spain

C. Galán
Dpto. Construcciones Arquitectónicas I. Escuela Técnica Superior de Arquitectura de Sevilla, Spain

P. Nadal
Dpto. Economía Aplicada I. Facultad de C. E. E. de Sevilla, Spain

Abstract


The increasing on voids or pores in any material - if the rest of characteristics remains equal -always causes a decrease in their mechanical strength since the ratio volume/resistant mass is lower Following all these fact a well known conclusion rises: there is a relationship between compacity/porosity and mechanical strengths. The purpose of this research is to establish a new possible correlation between both concrete properties with independence of the proportions, type of cement, size of grain, age, use. etc. So it can be concluded that the results of this research allow the engineer or architect in charge of a restoration or reparation to determine the compression strength of a concrete element. A first step is to determine the porosity through a rather short number of tests. Subsequently, compression strength will be obtained applying just a mathematical formula.

Keywords


porosity; compressive strength; concrete; compactness; test

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