As can be seen, kL composite sample is significantly lower than the BTS, when f = 0.5 vol% (when b increases to 0.8 vol%, kL has increased), with the increase of the content of BT (b), kL decreases.
As can be seen, the kL of the composite specimen is significantly lower than BTS, and the kL increases as the f-plus is 0.8 vol% (when b increases to 0.8 vol%), and decreases as the BT content (b), kL decreases.
It can be seen that the KL of the composite sample is significantly lower than that of BTS, when f = 0.5 vol% (when B increases to 0.8 vol%, KL increases), with the increase of BT content (b), KL decreases.