Cristin-resultat-ID: 1485529
Sist endret: 27. oktober 2017 12:58
NVI-rapporteringsår: 2017
Resultat
Vitenskapelig artikkel
2017

Masonry’s Resistance to Driving Rain: Mortar Water Content and Impregnation

Bidragsytere:
  • Fredrik Slapø
  • Tore Kvande
  • Noralf Bakken
  • Marit Kristin Haugen og
  • Jardar Lohne

Tidsskrift

Buildings
ISSN 2075-5309
e-ISSN 2075-5309
NVI-nivå 1

Om resultatet

Vitenskapelig artikkel
Publiseringsår: 2017
Volum: 7
Hefte: 3
Artikkelnummer: 7030070
Open Access

Importkilder

Scopus-ID: 2-s2.0-85027717691

Klassifisering

Vitenskapsdisipliner

Teknologi

Emneord

Slagregn • Mørtelstrøm • Impregnering

Beskrivelse Beskrivelse

Tittel

Masonry’s Resistance to Driving Rain: Mortar Water Content and Impregnation

Sammendrag

Alongside well-researched themes such as water and moisture, the service life and function of masonry veneers are often compromised by precipitation combined with poor design considerations, execution, and selection of materials. Little research has been carried out on the subject of the impact of mortar consistency on masonry’s resistance to driving rain. Water-repellent (WR) impregnation is typically considered a quick fix when problems occur. Wall-panels of 1 m2 built with different flow table values for the mortar have been tested in a driving rain chamber, where both time-lapse videos and the measuring of penetrated water are used to evaluate performance. Subsequently, the panels were impregnated with the most common types of WR products andre-tested. The analysis shows that changing the mortar mix from dry to wet can decrease the penetration of driving rain by a factor of ten. The test results presented in this article show that mortar with low water content gives a porous interfacial transition zone (ITZ), thereby increasing the rate of water penetration. The tested WRs are found to be ineffective in increasing masonry’s resistance to high pressure driving rain. The results, combined with what is already known about WR treatments on masonry, call for careful consideration before applying such treatment. This proves especially true in countries with much driving rain followed by frequent freeze-thaw cycles.

Bidragsytere

Fredrik Slapø

  • Tilknyttet:
    Forfatter
    ved Institutt for bygg- og miljøteknikk ved Norges teknisk-naturvitenskapelige universitet

Tore Kvande

  • Tilknyttet:
    Forfatter
    ved Institutt for bygg- og miljøteknikk ved Norges teknisk-naturvitenskapelige universitet

Noralf Bakken

  • Tilknyttet:
    Forfatter
    ved Arkitektur, byggematerialer og konstruksjoner ved SINTEF AS

Marit Kristin Haugen

  • Tilknyttet:
    Forfatter
    ved Infrastruktur ved SINTEF AS

Jardar Lohne

  • Tilknyttet:
    Forfatter
    ved Institutt for bygg- og miljøteknikk ved Norges teknisk-naturvitenskapelige universitet
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