Studies on Coral Finger Concrete2

In previous studies, it was clarified that the strength of Coral Finger concrete was high enough to be used in ordinary concrete works, and that he strong segregation properties of Coral finger concrete could be improved by using AE agents or water reducing agents In this study the following results are obtained. 1.The strength of Coral finger concrete is depend largely on the kind of Coral finger aggregates used. And there are the concretes having equally high strength as the ordinary crushed stone concretes have. 2.The quantitative study of bleeding are made: the rates of bleeding can be reduced a little by using AE agents, but the quantity of bleeding can be reduced some. This tendency is almost the same in the crushed stone concretes, but the bleeding of Coral finger concretes is much largerer in quantity and much more rapid than that of the crushed stone concretes. 3.The young's modulus of the Coral finger concrete is considerablly lower than that of the crushed stone concrete, and the value of it is higher than or about the same as the values specified in the specification. 4.The reference table of mix proportionning of Coral finger concretes are presented, which can be served as the standards in trial mixes of Coral finger concrete work