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Use of two-stage (pre-placed aggregate) concrete to produce durable structural concrete



Author(s): H. S. Abdelgader, A. S. El-Baden and A. H. Fahema
Paper category: Workshop
Book title: RILEM International workshop on performance-based specification and control of concrete durability
Editor(s): D. Bjegović, H. Beushausen, M. Serdar
ISBN: 978-2-35158-135-3
e-ISBN: 978-2-35158-136-0
Pages: 523 - 529
Total Pages: 7
Language: English


Abstract: 
During the last decades, the concrete industry has been widely developing in many ways such as the methods of pouring concrete in order to achieve high quality concrete and low cost. Two-stage (Pre-placed aggregate) concrete is produced by placing coarse aggregate in a form and later injecting a cement-sand grout, to fill the voids between aggregate particles. For economic and technical reasons two stage concrete is particularly used for construction and repair of mass structures, especially foundations, underwater constructions, and in all kinds of construction with closely spaced reinforcement. This paper presents some implementations of using such concrete in repair works, some formulae and guidelines which describe the mechanical parameters of this concrete such as modulus of elasticity, tensile strength and drying shrinkage. It was found that the modulus of elasticity and splitting tensile strength of two-stage concrete is equivalent or higher than that of conventional concrete at the same compressive strength.


Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00