The Job
This North Carolina undersealing project by CJGeo was part of a commercial building renovation. As part of converting a Research Triangle facility from light office use to lab space, significant increases in floor loads required installing new micropile foundations inside the building. During slab demo for these new foundations, extensive voids were discovered under the floors.
Undersealing adjacent to a new foundation area.
The Challenge
The structural engineer directed the general contractor to fill the voids below the floors. Because of the extensive drill traffic for installing the micropiles, they wanted to ensure that the slab did not catastrophically fail in the short term. They also wanted to ensure long term stability of the slabs given the increase in loading with the space's use change.
The Solution
CJGeo recommended undersealing the slabs with CJGrout 20SDB. 20SDB is designed for high mobility undersealing, ensuring that all voids are filled. This is typically verified by cross-hole communication of grout. Two CJGeo crews undersealed more than 15,000 square feet of space in less than a week, with zero interruption to operations of the other trades.
Installing the CJGrout 20SDB.
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