Grinding is inexpensive yet unattractive and compromises the strength and integrity of the concrete. Moreover, because the initial cause of the failure (sinking) has not been addressed, the slab may continue to sink or shift. Once ground, the slab can never again be raised to its original level.
Replacement is the most expensive option. Time-consuming and labour intensive, replacement can be inconvenient for customers and homeowners alike. It requires the breaking up and removal of the damaged or sunken concrete sections, site preparation, framing and re-pouring and preparation of the concrete.
Mudjacking or cementitious grouting is a process where a liquefied slurry – comprised of water, ash, topsoil, lime and cement – is hydraulically pumped beneath the slab to raise the level and close the gaps. This method, when applied to a subgrade that has already settled, may lead to further settling.
Until recently, mudjacking has been the accepted method for concrete lifting and levelling and remains a widely accepted form of restoration. Times have changed, and today, concrete lifting foam is fast becoming the preferred approach to concrete repair. Though mudjacking and concrete lifting foam produce similar results, the process and extended performance of the two products are vastly different. Red Deer now has a better alternative!