I have a raised porch with a concrete slab app. 6ft by 4 ft. The
concrete slab moves when stepped on, not enough to be unsafe, it just
wobbles slightly. Inspection indicates the fill under the slab has
settled, and the left hand corner of the slab goes down slightly when
stepped on. Before I have the slab broken up and repoured, I was
wondering if there was any method for injecting some substance under
the left hand corner to fill the void there. Has anyone expereienced a
similar situation and been able to solve it without complete removal
and replacement?
Thanks for any advice.

Harold


maytonh@cox"dot"net

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harold wrote:
I have a raised porch with a concrete slab app. 6ft by 4 ft. The
concrete slab moves when stepped on, not enough to be unsafe, it just
wobbles slightly. Inspection indicates the fill under the slab has
settled, and the left hand corner of the slab goes down slightly when
stepped on. Before I have the slab broken up and repoured, I was
wondering if there was any method for injecting some substance under
the left hand corner to fill the void there. Has anyone expereienced a
similar situation and been able to solve it without complete removal
and replacement?
Thanks for any advice.

Harold


maytonh@cox"dot"net

replace the "dot" to respond


A skilled slabjacker can work wonders. Check your yellow pages. They
do exactly what you mention -- they inject a slurry under pressure,
usually through a hole they've drilled into the concrete. It leaves a
dimple, but it beats replacing a boatload of concrete.