Aggregates in Concrete Mix Design

The importance of studying the behaviour and properties of concrete can be highlighted by considering the fact that concrete is the most used man-made material in the world. The very first step in making concrete is its mix design and deciding the type and amount of constitutes used in the productio...

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Main Author: Ghasemi, Yahya
Format: Others
Language:English
Published: Luleå tekniska universitet, Byggkonstruktion och -produktion 2017
Subjects:
Online Access:http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-61659
http://nbn-resolving.de/urn:isbn:978-91-7583-800-7
http://nbn-resolving.de/urn:isbn:978-91-7583-801-4
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spelling ndltd-UPSALLA1-oai-DiVA.org-ltu-616592018-08-18T05:36:19ZAggregates in Concrete Mix DesignengGhasemi, YahyaLuleå tekniska universitet, Byggkonstruktion och -produktionLuleå2017Mix designwater layer theoryparticle packingaggregatesspecific surface areaBuilding TechnologiesHusbyggnadThe importance of studying the behaviour and properties of concrete can be highlighted by considering the fact that concrete is the most used man-made material in the world. The very first step in making concrete is its mix design and deciding the type and amount of constitutes used in the production of concrete which should fulfil the requirements of the final product. Mix design models are commonly used for the purpose of proportioning concrete ingredients while anticipating the properties of the final product.  The current document deals with the commonly used principals in mix design models namely particle packing theory and excess water/paste layer theories. The conducted studies includes an investigation on accuracy of particle packing models (Toufar, 4C, CPM) and also tries to address the issue with measurement of specific surface area of particles as an essential input to water/paste layer theories.  It has been observed that the particle packing models can predict the packing density with acceptable margin. However, it should be mentioned that the particle packing models by themselves are not mix design models but should be rather used as a part of a mix design. In addition, it was found that the accuracy of calculating the specific surface area of particles based on their size distribution curve can be further improved by assuming angular platonic solids as uniform shape of aggregate instead of traditional approach of assuming spheres for aggregates’ shape.  Licentiate thesis, comprehensive summaryinfo:eu-repo/semantics/masterThesistexthttp://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-61659urn:isbn:978-91-7583-800-7urn:isbn:978-91-7583-801-4Licentiate thesis / Luleå University of Technology, 1402-1757application/pdfinfo:eu-repo/semantics/openAccess
collection NDLTD
language English
format Others
sources NDLTD
topic Mix design
water layer theory
particle packing
aggregates
specific surface area
Building Technologies
Husbyggnad
spellingShingle Mix design
water layer theory
particle packing
aggregates
specific surface area
Building Technologies
Husbyggnad
Ghasemi, Yahya
Aggregates in Concrete Mix Design
description The importance of studying the behaviour and properties of concrete can be highlighted by considering the fact that concrete is the most used man-made material in the world. The very first step in making concrete is its mix design and deciding the type and amount of constitutes used in the production of concrete which should fulfil the requirements of the final product. Mix design models are commonly used for the purpose of proportioning concrete ingredients while anticipating the properties of the final product.  The current document deals with the commonly used principals in mix design models namely particle packing theory and excess water/paste layer theories. The conducted studies includes an investigation on accuracy of particle packing models (Toufar, 4C, CPM) and also tries to address the issue with measurement of specific surface area of particles as an essential input to water/paste layer theories.  It has been observed that the particle packing models can predict the packing density with acceptable margin. However, it should be mentioned that the particle packing models by themselves are not mix design models but should be rather used as a part of a mix design. In addition, it was found that the accuracy of calculating the specific surface area of particles based on their size distribution curve can be further improved by assuming angular platonic solids as uniform shape of aggregate instead of traditional approach of assuming spheres for aggregates’ shape. 
author Ghasemi, Yahya
author_facet Ghasemi, Yahya
author_sort Ghasemi, Yahya
title Aggregates in Concrete Mix Design
title_short Aggregates in Concrete Mix Design
title_full Aggregates in Concrete Mix Design
title_fullStr Aggregates in Concrete Mix Design
title_full_unstemmed Aggregates in Concrete Mix Design
title_sort aggregates in concrete mix design
publisher Luleå tekniska universitet, Byggkonstruktion och -produktion
publishDate 2017
url http://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-61659
http://nbn-resolving.de/urn:isbn:978-91-7583-800-7
http://nbn-resolving.de/urn:isbn:978-91-7583-801-4
work_keys_str_mv AT ghasemiyahya aggregatesinconcretemixdesign
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