Abstract
The increase of entrained air in concrete may be also effective for the reducing of salt scaling deterioration of concrete. Two kinds of small sized balloon components, A：classified coal fly ash and B：balloon foamed from polyvinylidene chloride are used and mixed with cement mortar in this study. Effectiveness of addition of two kind of balloon component against the salt scaling resistance of mortar is evaluated to compare with air entrained mortar, using small sized sample test method for salt scaling test which the author proposed previously. In case of using AE agent, 20％ of air content decreased during transportation, placing, compaction and setting of fresh concrete and was gone outside. Balloon component A is not effective to reduce salt scaling, because the shell thickness of component A is too thick to strain as same as entrained air void. Balloon component B is effective to increase durability of concrete for salt scaling, because component B with thin shell thickness to strain by pressure plays a role of entrained air void. Addition of component B has more effective to keep air content in concrete, because component B remains inside during transportation, placing, compaction and setting of fresh concrete.
