Comparison Between Different Experimental Techniques for Stiffness Monitoring of Cement Pastes
| Autor: | Miguel Azenha, Christoph Fernandes Sousa, José Luís Duarte Granja, Cristiana Ferreira |
|---|---|
| Přispěvatelé: | Universidade do Minho |
| Rok vydání: | 2014 |
| Předmět: |
Response method
Cement Vicat softening point Science & Technology Materials science Continuous monitoring 0211 other engineering and technologies Stiffness 02 engineering and technology Building and Construction 021001 nanoscience & nanotechnology Cyclic compression Engenharia e Tecnologia::Engenharia Civil 021105 building & construction Thermal Engenharia Civil [Engenharia e Tecnologia] medicine General Materials Science Ultrasonic sensor medicine.symptom Composite material 0210 nano-technology |
| Zdroj: | Repositório Científico de Acesso Aberto de Portugal Repositório Científico de Acesso Aberto de Portugal (RCAAP) instacron:RCAAP |
| ISSN: | 1347-3913 1346-8014 |
| DOI: | 10.3151/jact.12.46 |
| Popis: | 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°C and 40°C is explored. Fundação para a Ciência e a Tecnologia (FCT) |
| Databáze: | OpenAIRE |
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