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16 May 2007 Continuous monitoring of setting and hardening of mortar using FBG sensors
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The use of fibre Bragg grating sensors to study mortars' dimensional variations during the setting process is reported. When determining a mortar's potential to fissure, it's important to know its total retraction. This means it is necessary to know not only the mortar's retraction after hardened, but also to know how much it retracts during the plastic phase. This work presents a technique which allows to measure dimensional variations, either expansion or retraction, during the whole setting process. Temperature and strain evolution during both plastic and hardened phase of the mortar were obtained, allowing the determination of dimensional variations and setting times. Due to its high-speed, ease of implementation and low operation costs, this technique will allow to get a deeper knowledge of the effects of several additives on the mortar's behaviour, allowing to improve its mechanical properties through the determination of the proper chemical composition.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
H. Lima, R. Ribeiro, R. Nogueira, L. Silva, I. Abe, and J. L. Pinto "Continuous monitoring of setting and hardening of mortar using FBG sensors", Proc. SPIE 6585, Optical Sensing Technology and Applications, 65850D (16 May 2007);

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