Case studiesSettling slab in a pole building? Slabjack Geotechnical

March 15, 2017by Jerald Sargent0

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Pole buildings present some unique challenges because they are not built on a traditional foundation as most structures are in freeze/thaw climates. In addition it is uncommon for builders to specify reinforcement such as rebar or welded wire mesh. As a result cracking and settling are common.

There are many things that should be taken into consideration PRIOR to building a pole building that will greatly minimize problems with the concrete portion of the structure, but that’s for another post. For now let’s consider what to do when things start to go wrong.

1) It won’t ever be less costly to fix the problem, so if you can….fix it now before greater problems rear their ugly heads.

2) There are several options for slabs going bad; replacement, raising and top coating. Let’s discuss these three.

Replacement – best option if the settling is severe, the slab has several fractures or if there are serious underlying issues with the base soil. Advantages; new appearance, can re compact the base, can add rebar and/or wire mesh. Disadvantages; have to empty out building, disruptive, takes time to tear out old slab, frame and pour then cure time up to four weeks, most costly by far.

Raising – methods include Mudjacking, polymer injection and pressure grouting. Each method has advantages and disadvantages however having used the first two methods and seen the aftermath of the third we have focused our contracting business on polymer injection exclusively since 2011. Advantages; less costly, less invasive, ready for immediate use, depending on the extent we can even underseal and insulate your floor! In addition slab raising is a proven method which has been in existence since the 1930’s if the underlying soil is stable the repair should be permanent.

Top coating – pouring additional concrete over the slab to “fill in” lower/settled sections. Advantages; new appearance. Disadvantages; additional weight will exacerbate settling problems, cracks right where under slab has cracked, can be costly, temporary fix.

If you find yourself dealing with the pole building going bad give the concrete raising and leveling professionals call today.

Superior technology, Superior polymers, Superior results.


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