TECHNICAL
DISASSEMBLY TESTS
The disassembly tests were arranged by first casting three foundation
blocks to the ground, 0.5 m x 0.5 m x 0.5 m in size. While one of the
blocks was equipped with HPM® 16 L Anchor Bolts, the other two blocks
were equipped with COPRA® 16 H Anchoring Couplers and M16 Threaded
Bars (see figure 4).
In the second phase, precast columns (0.35 m x 0.35 m x 1.5 m), equipped
with corresponding HPKM® 16 Column Shoes, were installed on the
foundations (see figure 5) and the gaps between parts were eventually
grouted with Fescon’s JB 600/3, which is commonly used cement based
mortar in Finland, generating the compressive strength up to 60 MPa.
A couple of weeks later, the dismount was executed by opening the upper
nuts of anchor bolts / threaded bars and lifting the precast columns up
using a mobile crane. After the dismount of the columns, the hardened
grout blocks were removed quickly and easily. The adhesive bond
between the grout and the structures was easily broken, and the grout
got separated cleanly from the precast columns and the foundation blocks
(see figure 6 and 7).
FIGURE 4 FOUNDATION WITH HPM® ANCHOR BOLTS FURTHER BACK AND
FOUNDATION WITH COPRA® ANCHORING COUPLERS IN THE FOREFRONT
FIGURE 5 PRECAST COLUMN INSTALLED ON A
FOUNDATION WITH TIMBER FORMWORK
FIGURE 6 REMOVED GROUT PAD AND EXPOSED FOUNDATION WITH COPRA®
ANCHORING COUPLERS
FIGURE 7 SURFACE OF THE GROUT PAD WITH REMOVED COLUMN.
CONNECTION WITH THE USE OF HPM® ANCHOR BOLTS
32 PEIKKO CONNECTIONS 1/2021