Abstract
Coal ash concrete mixed by the following proportions were tested according to the JIS A1302.
Proportions by volume basis.
cement : lime : ash
1 1 9
1 0.15 6
The coal used in this test was ordinary one and contained unburnt coal, which was 11.3% by weight.
The result was obtained as following table.
In general, light weight concrete is more effective for fire protection. But in case of ash concrete owing to the unburnt coal, this general rule does not hold true, and the results with ∗ marks showed that the ash concrete must be thicker than the ordinary concrete.
