Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Frost Resistance of Concrete – Experience from Long-Term Field Exposure
RISE - Research Institutes of Sweden (2017-2019), CBI Betonginstitutet.
Chalmers University of Technology, Sweden.
Lund University, Sweden.
RISE - Research Institutes of Sweden (2017-2019), CBI Betonginstitutet.ORCID-id: 0000-0003-1904-7426
Vise andre og tillknytning
Ansvarlig organisasjon
2018 (engelsk)Rapport (Annet vitenskapelig)
Abstract [en]

This report presents the results from a research project financed by Trafikverket, the Swedish Transport Administration, co-financed by Cementa AB.

The purpose of this project is to investigate concrete specimens exposed to a de-icing salt highway environment at Highway 40 close to Borås after about 20 years. The project work was divided into two parts: Part One for frost resistance of concrete and Part Two for chloride ingress and reinforcement corrosion.

In Part One, more than 100 types of concrete mixes with different binder types/combinations, water-binder ratios (w/b) and air contents exposed at three field test sites were examined for external and internal frost damage by measurements of the changes in volume of, and in ultrasonic transmission time through, the specimens. Furthermore, some laboratory tests were carried out to supply necessary data for modelling and identify the possible mechanisms causing frost damage.

The results show clearly that the highway environment is the most aggressive with regard to external frost damage. Further, the results from this study show that the existence of entrained air and the water-binder ratio are the main parameters influencing the resistance of concrete to external salt-frost damage. Furthermore, the concrete mixes with CEM I, CEM I + 5 % silica, CEM II/A-LL, CEM II/A-S and CEM I + 30 % slag as binder with entrained air and a water/binder ratio of 0.4 or below, has good resistance to internal and external frost damage. Results show that concrete containing large amounts of slag as part of the binder (CEM III/B) have the severest scaling, irrespective of its content of entrained air.

Comparing results from laboratory testing of salt-frost resistance in accordance with SS 13 72 44 (the ‘Slab test’ in CEN/TS 12390-9) with results after nineteen years’ exposure at the highway exposure site shows that the laboratory standard classifies most concrete qualities correctly.

However, there is an indication that the laboratory test method may overestimate the scaling resistance of concrete containing a medium to high content of slag as part of the binder. This indicates a need to consider a revision of the slab test procedure so that aging processes is better taken into consideration. A somewhat longer preconditioning time with at least partially an increased carbon dioxide content would for example lead to that the effect of carbonation is better reflected.

sted, utgiver, år, opplag, sider
2018. , s. 153
Serie
Trafikverkets forskningsportföljer
Emneord [en]
Concrete, field exposure, salt-frost resistance, chloride ingress, corrosion, durability
HSV kategori
Forskningsprogram
FOI-portföljer, Bygga
Identifikatorer
URN: urn:nbn:se:trafikverket:diva-5738ISBN: 978-91-88907-09-7 (digital)OAI: oai:DiVA.org:trafikverket-5738DiVA, id: diva2:1734181
Prosjekter
Frostskador och kloridinträngning i betong efter fältexponering i tösaltad vägmiljö under lång tid. Fältprovning efter 20 år vid RV40
Forskningsfinansiär
Swedish Transport Administration, TRV 2015/54986Tilgjengelig fra: 2023-02-06 Laget: 2023-02-06 Sist oppdatert: 2023-02-07bibliografisk kontrollert

Open Access i DiVA

fulltekst(16006 kB)217 nedlastinger
Filinformasjon
Fil FULLTEXT01.pdfFilstørrelse 16006 kBChecksum SHA-512
1c9562cc39470559b7cf3d2535fbe97891f4d8b9ae6b5b05065b6bea7c13a221e744286e5e408b989d5d800a3c6236c5dd9892f5f331d85c43656fdcccc041ca
Type fulltextMimetype application/pdf

Person

Mueller, Urs

Søk i DiVA

Av forfatter/redaktør
Mueller, Urs

Søk utenfor DiVA

GoogleGoogle Scholar
Totalt: 220 nedlastinger
Antall nedlastinger er summen av alle nedlastinger av alle fulltekster. Det kan for eksempel være tidligere versjoner som er ikke lenger tilgjengelige

isbn
urn-nbn

Altmetric

isbn
urn-nbn
Totalt: 312 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
v. 2.45.0