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2. Concrete leveling - Wikipedia

   en.wikipedia.org/wiki/Concrete_leveling

   Slabjacking. "Slabjacking" is a specialty concrete repair technology. In essence, slabjacking attempts to lift a sunken concrete slab by pumping a substance through the concrete, effectively pushing it up from below. The process is also commonly referred to as "mudjacking" and "pressure grouting.”.

3. Lift slab construction - Wikipedia

   en.wikipedia.org/wiki/Lift_slab_construction

   Lift slab construction. Lift slab construction (also called the Youtz-Slick Method) is a method of constructing concrete buildings by casting the floor or roof slab on top of the previous slab and then raising (jacking) the slab up with hydraulic jacks. This method of construction allows for a large portion of the work to be completed at ground ...

4. Sandjacking - Wikipedia

   en.wikipedia.org/wiki/Sandjacking

   Sandjacking is the process of lifting concrete and filling in the space underneath with sand, which allows for frugal repairs in concrete applications. [1] The basic premise is to lift concrete and to then fill the resultant void absolutely with compacted sand. Sandjacking includes the careful assessment of what is required to restore concrete ...

5. Natural oil polyols - Wikipedia

   en.wikipedia.org/wiki/Natural_oil_polyols

   One of the first uses for NOPs (other than castor oil) was to make spray-on polyurethane foam insulation for buildings. NOPs are also finding use in polyurethane slab foam used to make conventional mattresses as well as memory foam mattresses. The characteristics of NOPs can be varied over a very wide range.

6. List of polyurethane applications - Wikipedia

   en.wikipedia.org/wiki/List_of_polyurethane...

   The Browns Ferry Nuclear Power Plant used flammable polyurethane foam as a firestop, which was accidentally ignited and caused a major fire. Water vessels. Polyurethane foam is widely used in the marine world in many applications: Inflatable boats. Some raft manufacturers use urethane for the construction of inflatable boats.

7. Waffle slab - Wikipedia

   en.wikipedia.org/wiki/Waffle_slab

   A waffle slab or two-way joist slab is a concrete slab made of reinforced concrete with concrete ribs running in two directions on its underside. [1] The name waffle comes from the grid pattern created by the reinforcing ribs. Waffle slabs are preferred for spans greater than 40 feet (12 m), as they are much stronger than flat slabs, flat slabs ...