Comparison Between Different Experimental Techniques for Stiffness Monitoring of Cement Pastes

• Tipo: Artigo em Revista Científica Internacional
• Data: 2014

Autores

Granja, JL (Autor) Outra; Azenha, M (Autor) Outra; de Sousa, C (Autor) Outra; Cristiana Ferreira (Autor) FEUP

Revista

Título: Journal of Advanced Concrete Technology

Vol. 12

Páginas: 46-61

ISSN: 1346-8014

Editora: Japan Concrete Institute/Nihon Konkurito Kogaku Kyokai

Indexação

ISI Web of Knowledge - 11 Citações

Scopus - 11 Citações

Outras Informações

ID Authenticus: P-009-C6N

DOI: 10.3151/jact.12.47

Abstract (EN): In 2009, a new methodology for the continuous monitoring of E-modulus of cement-based materials since casting was proposed, under the designation EMM-ARM (E-modulus Measurement through Ambient Response Method). This methodology is a variant to classic resonant frequency methods that allows continuous stiffness monitoring from the instant of casting. After the encouraging results obtained in the first applications of EMM-ARM to cement pastes, the present paper gives continuity to previous developments, through validations with additional experimental methodologies and extension to thermal activation testing. At first, a comparison is performed between the results of EMM-ARM and those obtained through: pulse velocity methods (both ultrasonic contact probes and bender-extender elements), penetration resistance (Vicat needle) and cyclic compression on cylindrical specimens. Afterwards, the possibility of studying the activation energy of the stiffness evolution on tests conducted at 20 degrees C and 40 degrees C is explored.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 16