Durability of lightweight self-consolidating concrete in massive structures

Author(s): M. Kaszynska
Paper category: Conference
Book title: Concrete Repair, Rehabilitation and Retrofitting III (ICCRRR)
Editor(s): M.G. Alexander, H.-D. Beushausen, F. Dehn, P. Moyo
Print ISBN: 978-0-415-89952-9
Publisher: Taylor & Francis Group
Pages: 70 – 71
Total Pages: 2
Language: English

Abstract: 
The light-weight self consolidating concrete combines the advantages of light-weight concrete with properties of self-consolidating concrete. It can save not only by reducing the weight of components, but the lightweight aggregate containing absorbed water is significantly more helpful for concretes made with a low water-cement ratio. The absorbed moisture in the light aggregate is available for internal curing that minimizes the early shrinkage. Thermal stresses evolving from self-heating of concrete masses as a result of exothermic processes during cement hydration can be important in evaluation of concrete structures, such as foundations, bridge abutments and piers. These stresses may cause external cracks in the structural elements resulting in a decrease of stiffness and resistance to various harmful factors occurring during the service life of concrete structures. To determine thermal stresses, it is necessary to establish the relevant processes of setting and hardening of concrete in a structure. This paper presents test results of workability properties and mechanical properties (compressive strength, tensile strength, modulus of elasticity and shrinkage) of self-consolidating concrete, hardening under adiabatic conditions (to simulate the true conditions of concrete hardening inside of a massive structure) and isothermal conditions. Various self-consolidating mixtures were considered by replacing a part of fine and coarse natural aggregate with fine and coarse light-weight aggregates.

Online publication: 2014
Publication Type: abstract_only
Public price (Euros): 0.00