Why Does Cement Sink and Crack?
“Cement moves in conjunction with the ground underneath it,” says Soulliere. “Over time, the earth can erode due to moisture in the ground, poor initial fill compaction, poor drainage, or the ground’s natural settling.” As the soil disperses or compacts, hollow areas and pressure points develop. Eventually, a combination of traffic and the concrete’s own weight causes it to shift and/or crack, allowing water to enter and further wash the soil away. How Does Slabjacking Work “Slabjacking involves pumping slurry beneath the concrete through small holes drilled in the cement,” says Soulliere. “It seeps into voids and crevices, depressing and stabilizing the existing subsoil, while raising the cement.” While all companies use this format, the actual mix, holes drilled and pouring methodology vary. Soulliere offers the following points to educate homeowners: Slurry Mix The mixture used can differ widely in content. These include: -A combination of sand and clay. -Leftover aggregate recovery
