Question

What are the effects of segregation and bleeding?

Answer 1

Explanation:

Due to bleeding concrete loses its homogeneity.

Bleeding is responsible for causing permeability in concrete.

As far as safety is concerned, water that accumulates below the reinforcing bars, reduces the bond between the reinforcement and concrete.

In the process of bleeding the accumulation of water creates a water voids and reduces bond between the aggregate and cement paste.

Due to bleeding pumping ability of concrete is reduced.

Increase in the water-cement ratio at the top.

The accumulation of water at the top, results in delayed surface finishing.

Effects of Bleediing

The bleeding is not completely harmful if the rate of evaporation of water is equal to the rate of bleeding. Normal bleeding is quite good for properties of concrete as it enhances the workability of concrete. Bleeding replaces the water lost by evaporation and prevents the surface from drying quickly before it has attained sufficient strength to resist cracking.

Early bleeding when the concrete mass is fully plastic, may not cause much harm, because concrete being in a fully plastic condition, will get subsided and compacted. It is the delayed bleeding, when the concrete has lost its plasticity, which causes undue harm to the concrete. Controlled re-vibration may also be adopted to overcome the effect of bleeding.

Answer 2

Bleeding of concrete causes and effects way to reduce it:

concrete is a mixture of cement fine aggregates and course aggregates .Number of problems can occurs during concrete due to improper mixture curing of placing one such problems in bleeding in concrete

BLEEDING in concrete is a phenomenon in which free water in the mixture rises up to the surface and forms a paste of cement on the surface know as "laitance"

this topic occurs lot of information but this is the main issues which i have text before

hope this will help u

MARK AS BRINLIST