Influencing Factors on the Interface Microhardness of Lightweight Aggregate Concrete Consisting of Glazed Hollow Bead

Figure 14

The influence of age of curing on the interfacial HV of cement paste at different levels of relative humidity ((a) for 7 d, (b) for 14 d, (c) for 28 d, and (d) for 56 d).

(a)

(b)

(c)

(d)