CONCRETE LIBRARY OF JSCE NO. 12. MARCH 1989
PREDICTION AND EVALUATION OF THE DEPTH OF CARBONATION
OF CONCRETE BY THE ACCELERATED TEST
(Translation from Proceedings of JSCE, No.390/V-8, Feb. 1988)
Hiroyuki OHGA
Shigeyoshi NAGATAKI
SYNOPSIS
The accelerated carbonation test is performed to predict the depth of
carbonation of concrete under natural exposure condition. The effect of initial
curing periods in water, binder content and the replacement ratio of fly ash on
the depth of carbonation of concrete under the accelerated carbonation condition
is evaluated. The test results of the accelerated carbonation test are compared
with those of the natural exposure test.
The depth of carbonation under the accelerated carbonation condition depends on
these factors and it can be predicted by the effective water/binder or
compressive strength of concrete cured
carbonation of concrete exposed indoors
the calculated value by the proposed
results.
The depth of carbonation
condition can therefore be predicted by
in water for 28 days.
The depth of
for 15 years has a good correlation with
equations using the accelerated test
of concrete under the natural indoor
the accelerated carbonation test.
H. Ohga is a research associate of Department of Civil Engineering at Tokyo
Institute of Technology, Tokyo, Japan.
He received his master of engineering
degree from Tokyo Institute of Technology in 1982. His recent research has been
on properties of concrete containing fly ash, blast furnace slag powder and
silica fume, and durability of concrete such as carbonation, alkali-aggregate
reaction and freeze—thaw resistance. He is a member of ACI, JSCE and JCI.
S. Nagataki is
of Technology,
the University
high strength
a professor of Department of Civil Engineering at Tokyo Institute
Tokyo, Japan.
He received his doctor of engineering degree from
of Tokyo in 1966.
His research interests cover properties of
concrete, effective use cfi‘ industrial by-products i11 concrete,
durability of concrete and torsional behavior of reinforced concrete member.
received a fellow of ACI in 1986.
and JSMS.
He
He is a member of ACI, ASCE, RILEM, JSCE, JCI