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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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 |
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heat of hydration concrete thermal cracking cement hydration w/c ratio cement extenders computer modelling concrete maturity adiabatic calorimeter adiabatic calorimetry |
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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 |
work_keys_str_mv |
AT greensmithchristophergraeme theeffectsofcementextendersandwatertobinderratioontheheatevolutioncharacteristicsofconcrete AT greensmithchristophergraeme effectsofcementextendersandwatertobinderratioontheheatevolutioncharacteristicsofconcrete |
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1719080639720849408 |