抄録
Thermo-dependency is one of the most important properties of resin concretes when they are used as structural members.
Compressive strength, compressive modulus of elasticity and tensile strength as well as compressive creep properties of resin concrete were investigated at various temperatures. Atmospheric temperatures adopted in the tests were 5, 20, 40, and 60°C.
The results obtained are summarized as follows.
(1) The compressive strength of polyester resin concrete decreases almost linearly as atmospheric temperature rises from 5°C to 60°C. And this tendency is very pronounced in the mixes with higher resin content.
(2) The compressive modulus of elasticity also decreases linearly as atmospheric temperature rises from 5°C to 60°C.
(3) The splitting tensile strength decreases as atmospheric temperature rises. However, in this test, it attained the maximum value at 40°C, probably because of the internal stress caused by setting shrinkage.
(4) The resin content has appreciable influence on thermo-dependency of creep deformation.
(5) The creep curve shows a portion proportional to the time, and it can be supposed to be due to viscous flow. The creep rate of this portion increases rapidly when the atmospheric temperature rises.
(6) The primary creep, which is the remainder of total creep deformation minus viscous flow, seems to show the minimum at 40°C.
(7) 60-100 percent of the creep deformation at 20°C recovers in about 40 days after unloading.
