Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/16184
Title: Prediction of moisture migration and pore pressure development in concrete subjected to microwaves
Authors: RAMLAL PRAKASH
Keywords: Heat and Moisture transfer, Concrete, Microwave heating, Computation, Pore pressure
Issue Date: 21-May-2007
Source: RAMLAL PRAKASH (2007-05-21). Prediction of moisture migration and pore pressure development in concrete subjected to microwaves. ScholarBank@NUS Repository.
Abstract: This study presents a computational model for predicting the spalling of concrete subjected to microwaves. A pair of coupled transient differential equations governing heat, moisture transfer and pore pressure development in porous concrete is derived. Water vapour and liquid water are considered in combination in the moisture transfer formulation. The physical model depicting transport process allows assessment of the temperature, moisture and pore pressure fields. A numerical analysis is performed simulating the coupled hygro-thermal phenomenon. Results show that as the microwave frequency increases, the pore pressure reaches peak values at a distance of less than 10 mm from the exposed surface. The corresponding peak pressure values reached are greatly influenced by the magnitude of microwave power and the time of exposure. The results obtained may be used to predict the potential of concrete spalling. Moreover the influence of permeability and initial liquid water content on the distributions of temperature, moisture and pore pressure fields has been studied.
URI: http://scholarbank.nus.edu.sg/handle/10635/16184
Appears in Collections:Master's Theses (Open)

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