Causes of Early Age Cracking on Concrete Bridge Deck Expansion Joint Repair Sections

Table 1

Temperature and shrinkage steel calculations for bridge decks.

Job number	Bridge number	Direction	Bar area/foot of deck (in^∧2/ft)	ACI temperature/shrinkage (in^∧2/ft)	LRFD temperature/shrinkage (in^∧2/ft)
1	1	Westbound Pier 1	1.448	0.027	0.072
1	1	Westbound Pier 2	1.448	0.027	0.072
1	1	Westbound Pier 3	1.448	0.027	0.072
1	1	Eastbound Pier 1	1.448	0.029	0.076
1	1	Eastbound Pier 2	1.448	0.029	0.076
1	1	Eastbound Pier 3	1.448	0.029	0.076
1	2	Westbound Pier 1 (span 1)	1.448	0.031	0.072
1	2	Westbound Pier 1 (span 2)	1.448	0.029	0.068
1	2	Westbound Pier 2 (span 3)	1.448	0.031	0.072
1	2	Westbound Pier 2 (Span 2)	1.448	0.029	0.068
1	2	Eastbound Pier 1 (span 1)	1.448	0.029	0.068
1	2	Eastbound Pier 1 (span 2)	1.448	0.027	0.065
1	2	Eastbound Pier 2 (span 3)	1.448	0.029	0.068
1	2	Eastbound Pier 2 (Span 2)	1.448	0.027	0.065
2	1	Westbound Pier 1	1.37	0.031	0.085
2	1	Westbound Pier 2	1.37	0.031	0.085
2	1	Eastbound Pier 1	1.37	0.031	0.085
2	1	Eastbound Pier 2	1.37	0.031	0.085
2	2	Westbound Pier 1	1.448	0.029	0.076
2	2	Westbound Pier 2	1.448	0.029	0.076
2	2	Eastbound Pier 1	1.448	0.027	0.072
2	2	Eastbound Pier 2	1.448	0.027	0.072
2	3	Westbound Pier 1 (Span 1)	1.696	0.029	0.068
2	3	Westbound Pier 1 (Span 2)	1.696	0.027	0.065
2	3	Westbound Pier 2 (Span 2)	1.448	0.027	0.065
2	3	Westbound Pier 2 (Span 3)	1.448	0.029	0.068
2	3	Eastbound Pier 1 (Span 1)	1.696	0.031	0.072
2	3	Eastbound Pier 1 (Span 2)	1.696	0.027	0.065
2	3	Eastbound Pier 2 (Span 2)	1.696	0.027	0.065
2	3	Eastbound Pier 2 (Span 3)	1.696	0.029	0.068
3	1	Eastbound Pier 1 (Span 1)	1.333	0.031	0.07
3	1	Eastbound Pier 2 (Span 1)	1.333	0.031	0.07
3	2	Pier 1 (Span 1)	1.565	0.033	0.072
3	2	Pier 1 (Span 2)	1.565	0.032	0.069
3	2	Pier 2 (Span 2)	1.565	0.032	0.069
3	2	Pier 2 (Span 3)	1.565	0.033	0.072
3	3	Pier 1 (Span 1)	1.565	0.033	0.072
3	3	Pier 1 (Span 2)	1.565	0.032	0.069
3	3	Pier 2 (Span 2)	1.565	0.032	0.069
3	3	Pier 2 (Span 3)	1.565	0.033	0.072
3	4	Pier 1 (Span 1)	1.565	0.035	0.075
3	4	Pier 1 (Span 2)	1.565	0.033	0.072
3	4	Pier 2 (Span 2)	1.565	0.033	0.072
3	4	Pier 2 (Span 3)	1.565	0.035	0.075