Abstract
In order to make better use of industrial solid waste fly ash to develop new foam concrete building materials, the different fly ash proportions are studied and dry density, mechanical performance and appearance of microstructure of foam cement with different ages are analyzed in this paper. The results show that the proportion of fly ash makes the performance of foam concrete develop in the adverse direction, and the proportion of fly ash should be strictly controlled. When the amount of fly ash replacing cement is 900g (i.e., fly ash accounts for 22.5 % of aggregate), the performance of the test block is more appropriate and in the best “cost performance” state. Under this condition, the dry apparent density of foam cement is 456 kg/m3 at 28 days of age, and the compressive strength is 2.34 MPa.
