Effect of specimen geometry and specimen preparation on the concrete compressive strength test

Farhad Aslani, Lino Maia and José Santos

Abstract

This paper discusses an experimental programme that was carried out to study the effects of specimen size-shape and type of moulds on the compressive strength of concrete. For this purpose, cube specimens with 150 mm dimensions, cylinder specimens with 150x300 mm dimensions, and prism specimens with 150x150x375 mm dimensions were prepared. The experimental programme was carried out with several concrete compositions belonging to strength classes C20/25, C25/30, C30/37, C40/50 and C60/75. Furthermore, the test results were curve-fitted using the least squares method to obtain the new parameters for the modified size effect law.

Key Words

compressive strength; size effect; specimen geometry; cure conditions

Address

Farhad Aslani: School of Civil, Environmental and Mining Engineering, The University of Western Australia, Crawley, WA 6009, Australia Lino Maia, José Santos: CONSTRUCT-LABEST, Faculty of Engineering (FEUP), University of Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal; Faculty of Exact Sciences and Engineering, University of Madeira, Campus da Penteada, 9020-105 Funchal, Portugal

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