This is a technical report about cement stabilization in general and the stabilization

process during the construction of a warehouse in Halmstad, Sweden in particular and is

written at the section for economy and technology at Halmstad University in

collaboration with NCC Anläggning.

NCC encountered variations in compression strength in the stabilized material on the first

warehouse that they constructed for the company Biltema. In our report we used the

stabilization process of the second warehouse for the same company as a reference to

determine what could be done to get a more homogeneous result for future projects.

We also looked in to what testing method is the most suitable to determine the result of

the stabilization.

After interviews with people involved in the process and visits on the work site we have

come to the conclusion that the most probable cause to the variations in compression

strength is segregation in the ballast material. This segregation can occur in several

different occasions in the process such as during the production, transportation and

handling on the work site.

Other causes for the variation can be improper compaction, overlapping stabilization in

some places and different duration of hardening of the samples that are tested.

The best way to do in situ test of the stabilized material is to do seismic investigations as

those are non-destructive tests in comparison to taking core samples and you can discover

any cracks or air bubbles in the material.