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![]() What Are The Advantages Of Pouring Concrete Over Concrete? If your existing surface has been in place for many years and has been exposed to a lot of weather elements, then pouring additional concrete over it will only add costs to your project without providing any additional benefit.This can be a time-consuming process that will require a lot of cleaning. #Pouring new layer of concrete over concrete freeIf the surface below is made of asphalt, you need to make sure that it is completely free of oil and other substances that could prevent the concrete from adhering properly.If your existing surface has been covered with sealant or paint, then removing these materials before pouring more concrete over them may cause damage that could cost even more money down the road when repairs are needed again soon after finishing the project.If the old surface was in poor condition, then pouring a new layer won’t fix the problem completely it will only cover them up temporarily until they reappear at a later date in another form (such as cracks).The new layer of concrete won’t be as strong as if you poured it over fresh, untouched ground or a foundation, so you may end up needing more reinforcement or additional support for heavy traffic areas of your home or business.What Are The Risks Of Pouring Concrete Over Concrete? also, if there is any protruding material below the surface, it should be buried within the new layer of concrete. but you will have to make sure that the new concrete is thicker than the surface it’s being poured on. Yes, you can pour concrete over concrete. Is it safe? Will it support another layer? Are both surfaces able to stand up against moisture and other elements? In most cases, there are some things you need to consider first before proceeding with any type of project involving concrete. #Pouring new layer of concrete over concrete crackedIf you’ve got an old, cracked and crumbling driveway that needs replacing or just want a more robust surface for your car or truck in the long term, pouring new concrete over the existing one might be the perfect solution. You can even pour concrete over existing concrete surfaces, but only as long as both surfaces are able to handle the weight of another layer of concrete. After all, there’s a lot you can do with this versatile material. These cuts will reduce curling related cracks.When it comes to concrete, you need to know your stuff. ![]() While you could tool joints, it's probably better to do early-entry sawcuts. In any case, be sure to cure the new work well and plan so you do not get curling, which will happen is you put plastic between the slabs (curls up due to exposed surface drying) or if you allow the old slab to suck moisture out of the new one (curls down as the bottom of the new work dries.) Bonding does not do anything except risk the complications caused by initial slab shrinkage and then thermal cycling.įor a bonded overlay, or one that is not intentionally debonded, make your mix as "non-shrink" as possible (i.e., keep cement content low, keep W/CM low, use a polycarboxylate water reducer, biggest large aggregate as feasible) and make sure the old concrete is SSD or you allow enough water into the mix for what will be sucked out by the old slab. Unbonded overlays simply transmit vertical loads to the new slab directly below. There is probably little reason to bond the slabs, since doing so puts a good outcome at risk without providing any benefit. ![]()
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