A Portland cement and a low calcium fly ash (a Class F fly ash according to ASTM C 618) were used in the experiment, their chemical compositions and particle size distributions are given in Table 1 and Fig. 1, respectively. The fundamental properties of the Portland cement are listed in Table 2. Industrial hydrogen peroxide solution with concentration of 27.5% by mass was selected as the foaming agent.
Polypropylene fiber with size of u 30 lm  9 mm was added to improve the crack-