This study is performed to examine the non-destruction properties of the Hwangtoh mortar. The absorption ratio is in the range of 8.25% ~ 18.16%, it tend to increase with increase using the stone dust and Hwangtoh. The pulse velocity and dynamic modulus at the curing age 7 and 28days are in the range of 2,290m/s ~ 4,140m/s, 2,976m/s ~ 4,219m/s and 105×10³kgf/㎠ ~ 293×10³kgf/㎠, 137×10³kgf/㎠ ~ 318×10³kgf/㎠, respectively. They tend to decrease with increase using the stone dust and Hwangtoh.