ISSN: 0149-6123
Page Count: 5

Evaluation of Laboratory Drying Procedures Relevant to Field Conditions for Concrete Sorptivity Measurements
DeSouza, SJ
Engineer, Agra Earth and Environmental, Ontario

Hooton, RD
Professor, University of Toronto, Ontario

Bickley, JA
Implementation manager, Concrete Canada, Ontario

Abstract

The surface humidities of a limited set of field concretes during summer conditions in Ontario were measured prior to water absorption (sorptivity) testing. A series of alternative laboratory curing conditions was carried out on cores prior to laboratory sorptivity tests, to determine which would best mimic average field conditions (surface humidities greater than 40% and moisture contents greater than 1%). It was found that three days' oven drying at 50°C followed by sealed drying for four days at 50°C as suggested by Parrott worked well. In addition, the moisture content at test was calibrated to measured sorptivity results.

Keywords:
rates of absorption, sorptivity, drying procedures, relative humidity

Paper ID: CCA10315J
DOI: 10.1520/CCA10315J
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