2020 Volume 76 Issue 1 Pages 67-76
In this paper, in order to clarify the mechanical characteristics of “Tataki”, or artificial stone, made from waste of the siliceous tuff, a series of laboratory tests are carried out. The experiments involve unconfined compression test, bending test and needle penetration test. From the experimental results, the in-situ applicability of Tataki as geomaterials or civil engineering materials is discussed. The following conclusions are obtained from the present study: (1) Unconfined compressive strength of Tataki made from waste of siliceous tuff increases remarkably by extending the curing period. Also the higher the density of Tataki is, the higher strength development effect of that is due to pozzolanic reaction. (2) Unconfined compressive strength of Tataki can be estimated by two parameters of dried density and curing period. (3) By compacting Tataki densely, the stiffness of Tataki becomes higher. (4) Sandy soil is unsuitable for base material of Tataki. (5) Even though the flexural strength of Tataki is not as high as that of mortar, its strength increases remarkably by extending the curing period. (6) Higher the density of Tataki is, its durability is high against repeated action of freezing, drying and soaking.
