Inverse analyses of effective diffusion parameters relevant for a two-phase moisture model of cementitious materials
2018 (engelsk)Inngår i: Cement and Concrete Research, ISSN 0008-8846, E-ISSN 1873-3948, Vol. 106, s. 117-129Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]
Here we present an inverse analyses approach to determining the two-phase moisture transport properties re-levant to concrete durability modeling. The purposed moisture transport model was based on a continuumapproach with two truly separate equations for the liquid and gas phase being connected by the sorption ki-netics. The moisture properties of ten binder-systems containingfly ash, calcined clay, burnt shale and graymicro-filler, were investigated experimentally. The experiments used were, (i) sorption test (moisturefixation),(ii) cup test in two different relative humidity intervals, (iii) drying test, and, (iv) capillary suction test. Masschange over time, as obtained from the drying test, the two different cup test intervals and the capillary suctiontest, was used to obtain the effective diffusion parameters using the proposed inverse analyses approach. Themoisture properties obtained with the proposed inverse analyses method provide a good description of the testperiod for the ten different binder-systems.
sted, utgiver, år, opplag, sider
Elsevier, 2018. Vol. 106, s. 117-129
HSV kategori
Forskningsprogram
Teknik, Byggteknik
Identifikatorer
URN: urn:nbn:se:lnu:diva-71491DOI: 10.1016/j.cemconres.2018.01.011ISI: 000429762800012OAI: oai:DiVA.org:lnu-71491DiVA, id: diva2:1189732
2018-03-122018-03-122018-07-10bibliografisk kontrollert