Evaluation of Subsurface Damage in Concrete Deck Joints Using Impact Echo Method

Table 1

Summary of results for GPR, PSPA, and coring.

Location	GPR results [5]	PSPA results	Coring results
Sta.1-2L	Severe	Severe	Severe
Sta.9-Cen	Moderate/severe	Slight	Moderate
Sta.9-16R	Moderate	Good	Moderate
Sta.17-2R	Slight	Slight	Good
Sta.17-12R	Good	Severe	Good
Sta.17-18L	Moderate	Moderate	Severe