THE EFFECTS OF VARIOUS MOULD RELEASE TECHNOLOGIES ON CONCRETE SURFACE FINISH

Author(s): Coventry, K. A., Richardson, A. E. and Baines, C.
Paper category: Conference
Book title: XIII International Conference on Durability of Building Materials and Components - XIII DBMC
Editor(s): Marco Quattrone, Vanderley M. John
Print ISBN: none
e-ISBN: 978-2-35158-149-0
Publication year: 2015
Pages: 1031-1040
Total Pages: 10
Language: English

Abstract: Concrete durability is dependent upon the quality of the concrete cover zone. The type of mould release technology used, has a direct effect on the surface finish of the formation of fair faced concrete, and this in turn affects long term durability and surface finish. This paper examines two mould release agents, one permeable formwork liner and Type 1 polypropylene fibres used with a single mould release agent. Cubes were cast in film faced plywood moulds using a C40 concrete that enabled comparisons to be drawn between the mould release agents.

The range of variables tested comprised of, two (FS and CL) commercially available solvent based mould release agents (MRA), permeable formwork and C1 used with polypropylene fibres.

The results showed that the controlled permeability formwork (CPF) liner produced the fewest blowholes and was the best performing technology used in that respect. As a consequence of this, CPF provided the most likely finish that would provide long term durability. None of the technologies employed produced a completely uniform colour throughout, however the CL MRA cubes and polypropylene fibre reinforced cubes produced the most consistent colouring.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00