ABSTRACT
A b s t r a c t T h i s p a p e r p r e s e n t s t h e u s e o f a s t a t i s t i c a l c o n c e p t t o q u a n t i f y i n - s i t u c o v e r o f r e i n f o r c e d c o n c r e t e s t r u c t u r e s and t h e r e s u l t s o f t h e a n a l y s e s o f e x i s t i n g c o n c r e t e c o v e r m e a s u r e m e n t s on a l a r g e number o f b u i l d i n g s i n A u s t r a l i a a n d J a p a n . I t was f o u n d t h a t t h e Levels of Confidence (LOC) f o r a c h i e v i n g minimum c o n c r e t e c o v e r f o r d u r a b i l i t y
w e r e p o o r , w i t h l e s s t h a n 50 p e r c e n t o f t h e s t r u c t u r e s a c h i e v i n g a 90% LOC. I t was p r o p o s e d t h a t a c h a r a c t e r i s - t i c c o v e r c o n c e p t w i t h 90% LOC b e a d o p t e d a s a c o m p l i a n c e c r i t e r i o n .
