Residual Compressive Strength Prediction Model for Concrete Subject to High Temperatures Using Ultrasonic Pulse Velocity.

Content Provider	Europe PMC
Author	Kim, Wonchang Choi, Hyeonggil Lee, Taegyu
Editor	De Domenico, Dario
Copyright Year	2023
Abstract	This study measured and analyzed the mechanical properties of normal aggregate concrete (NC) and lightweight aggregate concrete (LC) subjected to high temperatures. The target temperature was set to 100, 200, 300, 500, and 700 °C, and W/C was set to 0.41, 0.33 and 0.28 to evaluate high temperature properties at various intensities. Measurement parameters included mass loss, compressive strength, ultrasonic pulse velocity (UPV), and elastic modulus. We compared the residual mechanical properties between the target and preheating temperatures (20 °C) and then analyzed the correlation between UPV and compressive strength. According to the research findings, after exposure to high temperatures, LC demonstrated a higher mass reduction rate than NC at all levels and exhibited higher residual mechanical properties. The results of analyzing the correlation between compressive strength and UPV for concrete subjected high temperatures were very different from the compressive strength prediction equation previous proposed at room temperature, and the error range of the residual strength prediction equation considering W/C was reduced.
Journal	Materials (Basel)
Volume Number	16
DOI	10.3390/ma16020515
PubMed Central reference number	PMC9867174
Issue Number	2
PubMed reference number	36676252
e-ISSN	19961944
Language	English
Publisher	Molecular Diversity Preservation International (MDPI)
Publisher Date	2023-01-05
Access Restriction	Open
Subject Keyword	high temperature ultrasonic pulse velocity compressive strength type of coarse aggregate water-binder prediction model
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Materials Science