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Effects of Elevated Temperatures on Microwave Incinerated Rice Husk Ash blended Concrete

Nadarajan, Chandrakumar (2008) Effects of Elevated Temperatures on Microwave Incinerated Rice Husk Ash blended Concrete. Universiti Teknologi Petronas. (Unpublished)

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Abstract

Concrete subjected to rapid heating at high temperatures causes spalling of concrete. Spalling occurs when the tensile stress due to the pore pressure exceeds the tensile strength of concrete. Agricultural waste such as rice husk ash (RHA) is disposed through open burning. This contributes to elevating air pollution problems and causes respiratory diseases. This research studies the possibility of using RHA as a partial replacement for cement in concrete subjected to elevated temperatures, hence simultaneously providing a solution for spalling and air pollution problems. The objective of this study is to evaluate MIRRA as a supplementary cementitious material with reference to strength of hardened concretes and identify the optimal level of replacement of cement to improve concretes resistance to elevated temperatures. Tests were conducted on normal and RRA blended concrete. This included tests on compressive strength, fire resistance, Ultrasonic-Pulse Velocity and Scanning Electro-optic Microscope. Results show that MIRRA at 800°C with 5% partial replacement of OPC is the optimum mix proportion that maximizes concretes resistance to elevated temperatures.

Item Type: Final Year Project
Academic Subject : Academic Department - Civil Engineering - Structures, materials and construction
Subject: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Engineering > Civil
Depositing User: Users 2053 not found.
Date Deposited: 30 Sep 2013 16:23
Last Modified: 25 Jan 2017 09:45
URI: http://utpedia.utp.edu.my/id/eprint/7170

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