Effects of bleeding and segregation on the internal structure of hardened concrete

Bleeding of concrete a f t e r p l a c i n g tends to bring several kinds of defects to hardened concrete i n s t r u c t u r e s : bleeding channels, f i s s u r e s beneath aggregate p a r t i c l e s , weak bond between reinforcement and concrete, heterogeneity with the depth, weak c o n s t r u c t i o n j o i n t s by l a i t a n c e .