THE SALT-FROST RESISTANCE OF CONCRETE WITH SUPPLEMENTARY CEMENTITIOUS MATERIALS (SCM)

Author: Elisabeth Helsing, Peter Utgenannt
Paper category: Proceedings
Book title: Proceedings of the International RILEM Conference on Materials, Systems and Structures in Civil Engineering Conference Segment on Frost Action in Concrete
Editor(s): Marianne Tange Hasholt, Katja Fridh and R. Doug Hooton
ISBN:978-2-35158-182-7
e-ISBN:978-2-35158-183-4
Publisher:RILEM Publications SARL
Publication year:2016
Pages:62-71
Total Pages:10
Language:English

Abstract: The experience in Sweden with the slab method (reference method in CEN/TS 12390-9) for determining the salt-frost resistance of concrete is that it is successful in predicting the salt-frost resistance of Portland cement concrete. However, doubts have been raised whether the same can be said when used on concrete with supplementary cementitious materials SCM. Results from a research project which is carried out in order to validate the method for concrete with SCM or propose appropriate adjustments to it is presented in this paper. Six different variations of the pre-conditionings in the slab test are tested, the age of the specimens is increased, the time in 65 % RH is prolonged and exposure to 1 % CO2-
environment is included. The test programme covers mixes with up to 35 % fly-ash and 65% slag and two different Portland cements, all with a water-to-binder ratio =0.45. For air-entrained concrete with SCM both prolonging the exposure to 65 % RH and exposure to CO2 diminishes the salt-frost resistance. The influence increases with increasing amount of SCM.
However, the type of Portland cement also has a certain influence, and the type which has the highest salt-frost resistance when used alone exhibits a lower salt-frost resistance when combined with SCM than the other cement.

Online publication:2016
Publication type:full_text
Public price (Euros):0.00