The effects of cement extenders and water to binder ratio on the heat evolution characteristics of concrete

Student Number : 9900772K - MSc research project - School of Civil and Environmental Engineering - Faculty of Engineering and the Built Environment === The hydration of cement is an exothermic reaction, which begins almost immediately upon contact with water. This produces a large amount heat t...

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Main Author: Greensmith, Christopher Graeme
Format: Others
Language:en
Published: 2006
Subjects:
Online Access:http://hdl.handle.net/10539/1516
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spelling ndltd-netd.ac.za-oai-union.ndltd.org-wits-oai-wiredspace.wits.ac.za-10539-15162019-05-11T03:39:51Z The effects of cement extenders and water to binder ratio on the heat evolution characteristics of concrete Greensmith, Christopher Graeme heat of hydration concrete thermal cracking cement hydration w/c ratio cement extenders computer modelling concrete maturity adiabatic calorimeter adiabatic calorimetry Student Number : 9900772K - MSc research project - School of Civil and Environmental Engineering - Faculty of Engineering and the Built Environment The hydration of cement is an exothermic reaction, which begins almost immediately upon contact with water. This produces a large amount heat that subsequently raises the temperature of the concrete mixture, creating a temperature gradient across the member. The temperature rise associated with hydration induces thermo-mechanical stresses. These stresses can cause damage to the structure, affecting the durability and in extreme cases the functionality of the structure. If the maximum rate of heat evolution experienced can be minimised through the selection of the constituents of a concrete mixture, then the thermal stresses that develop in the concrete can be reduced. The main aim of this research is to develop a knowledge of how the heat evolution characteristics of concrete are affected by changing certain concrete mixture parameters and ingredients. The focus is on the addition of three different cement extenders and varying the water/cement ratio. This will be a step towards the development of a model for predicting the thermal properties of concrete. As a part of this investigation, a prediction model for the change in heat rate in concrete was developed. The model is intended to predict the contribution of the individual clinker crystallographic phases in cement and the heat liberated in concrete during hydration. 2006-10-31T08:51:29Z 2006-10-31T08:51:29Z 2006-10-31T08:51:29Z Thesis http://hdl.handle.net/10539/1516 en 10185275 bytes application/pdf application/pdf
collection NDLTD
language en
format Others
sources NDLTD
topic heat of hydration
concrete
thermal cracking
cement hydration
w/c ratio
cement extenders
computer modelling
concrete maturity
adiabatic calorimeter
adiabatic calorimetry
spellingShingle heat of hydration
concrete
thermal cracking
cement hydration
w/c ratio
cement extenders
computer modelling
concrete maturity
adiabatic calorimeter
adiabatic calorimetry
Greensmith, Christopher Graeme
The effects of cement extenders and water to binder ratio on the heat evolution characteristics of concrete
description Student Number : 9900772K - MSc research project - School of Civil and Environmental Engineering - Faculty of Engineering and the Built Environment === The hydration of cement is an exothermic reaction, which begins almost immediately upon contact with water. This produces a large amount heat that subsequently raises the temperature of the concrete mixture, creating a temperature gradient across the member. The temperature rise associated with hydration induces thermo-mechanical stresses. These stresses can cause damage to the structure, affecting the durability and in extreme cases the functionality of the structure. If the maximum rate of heat evolution experienced can be minimised through the selection of the constituents of a concrete mixture, then the thermal stresses that develop in the concrete can be reduced. The main aim of this research is to develop a knowledge of how the heat evolution characteristics of concrete are affected by changing certain concrete mixture parameters and ingredients. The focus is on the addition of three different cement extenders and varying the water/cement ratio. This will be a step towards the development of a model for predicting the thermal properties of concrete. As a part of this investigation, a prediction model for the change in heat rate in concrete was developed. The model is intended to predict the contribution of the individual clinker crystallographic phases in cement and the heat liberated in concrete during hydration.
author Greensmith, Christopher Graeme
author_facet Greensmith, Christopher Graeme
author_sort Greensmith, Christopher Graeme
title The effects of cement extenders and water to binder ratio on the heat evolution characteristics of concrete
title_short The effects of cement extenders and water to binder ratio on the heat evolution characteristics of concrete
title_full The effects of cement extenders and water to binder ratio on the heat evolution characteristics of concrete
title_fullStr The effects of cement extenders and water to binder ratio on the heat evolution characteristics of concrete
title_full_unstemmed The effects of cement extenders and water to binder ratio on the heat evolution characteristics of concrete
title_sort effects of cement extenders and water to binder ratio on the heat evolution characteristics of concrete
publishDate 2006
url http://hdl.handle.net/10539/1516
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