Carbonation Depth Model and Prediction of Hybrid Fiber Fly Ash Concrete

Table 3

Influence of fly ash content on carbonization depth of hybrid fiber concrete.

Fly ash content (%)	The increase rate of HFRC carbonization depth after adding fly ash (%)
	3 d	7 d	14 d	28 d
0	0	0	0	0
5	4.2	7.4	7.9	5.9
10	10.4	16.2	15.8	17.1
20	47.9	66.2	66.3	58.6
30	60.4	83.8	77.2	72.4