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Particle packing of aggregates for concrete mix design: Models and methods
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och -produktion.ORCID-id: 0000-0003-2567-5891
Luleå tekniska universitet, Institutionen för samhällsbyggnad och naturresurser, Byggkonstruktion och -produktion.
2014 (engelsk)Inngår i: Nordic Concrete Research, ISSN 0800-6377, Vol. 50, s. 109-112Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

An optimized aggregate particle packing density used as a base for concrete mix design provides economic, environmental and technical advantages. The particle packing density can be determined by many methods and predicted by different models. This paper reviews common packing and procedures and compares predictions of three common packing models to each other. It was found that the models tend to show different packing densities and percentage of ingredients for the same mixture. A test setup is proposed to determine the accuracy of each model’s prediction.

sted, utgiver, år, opplag, sider
2014. Vol. 50, s. 109-112
Emneord [en]
Mix Design, Loose Packing
HSV kategori
Forskningsprogram
Konstruktionsteknik
Identifikatorer
URN: urn:nbn:se:ltu:diva-31352Lokal ID: 58225252-55d4-4072-9bc0-21228d60c9bbOAI: oai:DiVA.org:ltu-31352DiVA, id: diva2:1004586
Konferanse
Nordic Concrete Research Symposia : 13/08/2014 - 15/08/2014
Merknad

Godkänd; 2014; 20140829 (yahgha); Konferensartikel i tidskrift

Tilgjengelig fra: 2016-09-30 Laget: 2016-09-30 Sist oppdatert: 2022-09-02bibliografisk kontrollert
Inngår i avhandling
1. Aggregates in Concrete Mix Design
Åpne denne publikasjonen i ny fane eller vindu >>Aggregates in Concrete Mix Design
2017 (engelsk)Licentiatavhandling, med artikler (Annet vitenskapelig)
Abstract [en]

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. 

sted, utgiver, år, opplag, sider
Luleå: Luleå University of Technology, 2017. s. 60
Serie
Licentiate thesis / Luleå University of Technology, ISSN 1402-1757
Emneord
Mix design, water layer theory, particle packing, aggregates, specific surface area
HSV kategori
Forskningsprogram
Byggproduktion
Identifikatorer
urn:nbn:se:ltu:diva-61659 (URN)978-91-7583-800-7 (ISBN)978-91-7583-801-4 (ISBN)
Presentation
2017-03-28, F1031, Lulea, 13:00 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2017-01-30 Laget: 2017-01-26 Sist oppdatert: 2018-08-17bibliografisk kontrollert

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Ghasemi, YahyaJohansson, Niklas

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