ESTONIAN ACADEMY
PUBLISHERS
eesti teaduste
akadeemia kirjastus
PUBLISHED
SINCE 1984
 
Oil Shale cover
Oil Shale
ISSN 1736-7492 (Electronic)
ISSN 0208-189X (Print)
Impact Factor (2021): 1.442
EXAMINATION OF CREEP AND SHRINKAGE BEHAVIOR OF CONCRETES WITH OIL SHALE ASH SUBSTITUTED CEMENTS; pp. 19–27
PDF | doi: 10.3176/oil.2009.1.04

Author
S. Oymael
Abstract
Two types of deformation – creep and shrinkage – occurring in cements and concretes are caused by compression and time. They lead to the loss of compressive strength. In the present study both deformation types were experimentally examined using concrete samples made from ordinary Port­land cement OPC 32.5 containing 0; 15 and 30% oil shale ash (OSA). Tests made during months showed that concretes produced using Portland cement with 15% OSA shrank less than samples containing no OSA (OPC contr.). This finding agrees with the condition that concrete samples produced using 15% OSA-added cement are not to display a deformation rate higher than 0.1% within six months and 0.5% within three months.
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