If the concrete with high drop Angle is used, it is necessary to add high efficiency water reducing agent to reduce the water consumption, or to add fine particle material in the concrete.
To reduce segregation and bleeding, the following methods can be used:
(1) the application of cement with fine particle size;
(2) increase the amount of cement, in the case of the same water consumption, rich mix ratio of concrete bleeding less than poor concrete;
(3) the application of fly ash or other volcanic ash materials;
(4) There should be enough fine particles in the sand or increase the amount of sand used;
(5) In case of serious bleeding, gas entrainment agent should be considered. The unconnected bubbles generated by air entraining agent are like increasing the composition of fine particles, which is beneficial to cut off the bleeding channel, reduce water consumption and increase workability.
