Fast-track concrete paving

Title: Fast-track concrete paving
Author(s): Brecht E.P. Anckaert, Lucie A.R. Vandewalle
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: 2
Language: English

Abstract: Tests were carried out to study the effect of cement type, superplasticizer type and ambient temperature on the fresh concrete properties and compressive strength of concrete with 12-hours target compressive strength of 40MPa. The concrete was produced at different workability levels with target slump values of 10 to 40mm and 100 to 150mm respectively. Concrete considered in this paper was produced using on the one hand a Portland cement CEM I 52.5 R LA and on the other a blast-furnace slag cement CEM III/A 42.5 N LA. Superplasticizers used were a sulphonated melamine formaldehyde condensate and a polycarboxylic ether respectively. Concrete specimens were allowed to cure under different temperatures (5°C-10°C-15°C-20°C) simulating variable weather conditions. Test results show that the workability and early-age concrete strength development are influenced by the cement type, superplasticizer type and ambient temperature. It is recommended not to use cement type CEM III in order to achieve 40MPa compressive strength at ages varying between 12 and 24 hours even at higher ambient temperatures. Also different types of superplasticizer can influence the hydration process in a different way, which affects both workability and compressive strength development at early ages.

Keywords: fast-track paving, concrete roads, rehabilitation, workability, early-age concrete strength development

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: 10.1617/2351580028.087