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No, wet concrete will not bond to dry concrete without an additional bonding agent. The common alternative is adding a sand or gravel layer under a concrete slab to enhance bonding and create a stable foundation. The right choice depends on the height and thickness of your two slabs, local laws, and the use of the specific concrete slab.

Whether or not you need reinforcements for your concrete slab depends on the thickness, what you’ll use the slab for, and the climate and soil conditions in your area. Adding reinforcements increases the strength and durability of your concrete slab, so it’s ideal for load-bearing slabs like driveways and home foundations. It can also help reduce the risk of cracking in extreme climates and areas that see excessive soil movement. Speak with your professional to determine if your project requires reinforcement.

Yes, you can remove oil stains from your driveway by applying an absorbent material such as baking soda, sawdust, or cat litter, pouring on a liquid detergent such as dish soap, scrubbing the area, and rinsing with water. You can also use a diluted bleach solution, white vinegar, or TSP solution on concrete.

Concrete homes have better fire resistance because this material is highly resistant to fire and heat. But any paint, siding, windows, roofing, or other materials on a concrete home may still be flammable. Never try to stay in a building with a large, active fire or a wildfire approaching because this can still be deadly. However, building a fireproof home with concrete can better protect the structure against total destruction.