Research Article
Experimental Study and Application of Inorganic Solidified Foam Filling Material for Coal Mines
Figure 8
SEM scan grams on materials at different curing ages.
(a) 1 d (1,000 times) |
(b) 1 d (5,000 times) |
(c) 28 d (1,000 times) |
(d) 28 d (5,000 times) |