Balcony repair with pumped self-compacting concrete

Title: Balcony repair with pumped self-compacting concrete
Author(s): Esko V-P. Sistonen, Jukka P. Piironen, Fahim M. Al-Neshawy, Seppo S. Huovinen
Paper category : conference
Book title: 2nd International RILEM Symposium on Advances in Concrete through Science and Engineering
Editor(s): J. Marchand, B. Bissonnette, R. Gagné, M. Jolin and F. Paradis
Print-ISBN: 2-35158-003-6
e-ISBN: 2351580028
Publisher: RILEM Publications SARL
Publication year: 2006
Nb references: 9
Language: English

Abstract: The usefulness of using self-compacting concrete in repaired structure is investigated in balcony repairs. Special concrete mix, framework and concreting methods are examined in field tests. The concrete is cast in 15 - 50 mm layer with and without reinforcement mesh.
The workability of fresh concrete and properties of hardened concrete are tested. The properties of the barrier layer of the repaired structure are tested with tensile strength test. Durability of self-compacting concrete resistant against frost action is also tested. The frost resistance of self-compacting concrete was investigated using the slab test; freeze-thaw cycling test and combination of carbonation and slab test.
Drying shrinkage of self-compacting concrete is measured for one year. Temperature and relative humidity of the barrier layer of repaired structure is monitored for two balconies stored in outdoors climate. The result from the project is guidance for using self-compacting concrete in repairing.
Based on the results acquired, self-compacting concrete is suitable for the outdoor conditions in Finland and complies with the frost resistance requirements. Carbonation level of concrete used in this study is lower than for normal concrete due to the improved tightness of self-compacting concrete. Drying shrinkage of self-compacting concrete was higher than the theoretical shrinkage for the normal concrete because self-compacting concrete contained more fine aggregate. Using reinforcement mesh reduces the shrinkage of self-compacting concrete.

Online publication: 2006-08-02
Classification: 3.3 Theme 3: Monitoring, Repair and Maintenance of Concrete Structures
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2351580028.110