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Prediction the water permeability of alkali activated fly ash based on MIP results



Author(s): Yuwei Ma, Guang Ye
Paper category: Conference
Book title: 2nd International conference on Microstructural-related Durability of Cementitious Composites
Editor(s): Guang Ye, K. Van Breugel, Wei Sun, Changwen Miao
Print ISBN: 978-2-35158-129-2
e-ISBN: 978-2-35158-123-0
Publisher: RILEM Publications SARL
Pages: 1278 - 1286
Total Pages: 8
Language: English


Abstract: 
Like cement-based materials, the microstructure of alkali activated fly ash (AAF) determines the water and ion transport properties. In this study, the pore structure of AAF was characterized by the mercury intrusion porosimetry (MIP) and environment scanning electron microscopy (ESEM). The water permeability of AAF was measured on the samples with different silica and alkali content, curing age and curing temperature. By comparing to the MIP results of AAF, a consistent relationship is found between the water permeability and the total porosity, effective porosity and gel pore threshold diameter respectively. Based on the parameters derived from MIP tests a modified model is proposed to predict the water permeability of AAF.


Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00