Case Study of Remaining Service Life Assessment of a Cooling Water Intake Concrete Structure in Indonesia

Table 9

Corrosion initiation time and concrete deterioration rate.

Train	A/B		C/D		E/F		G/H
Scenarios	Worst case	Average case	Worst case	Average case	Worst case	Average case	Worst case	Average case
Built (year)	1977		1982		1987		1995
Operated (year)	1979		1984		1989		1997
Compressive strength (MPa)	22.2	24.9	37.8	39.6	35.1	37.4	41.1	41.1
Cover thickness (mm)	50	83	32.5	65	53	74	44	61.7
Corrosion initiation (year)	1.82	13.91	5.73	35.56	10.25	26.13	6.99	26.13
Corrosion rate (mm/year)	0.229	0.100	0.118	0.056	0.081	0.053	0.079	0.056
Remaining capacity at 2013 (%)	44%	83%	77%	100%	90%	100%	94%	100%
Remaining capacity in 20 year (%)	21%	67%	59%	93%	77%	92%	80%	92%