How is PCA used to estimate slab thickness?
The PCA method simplifies the process, using only one design chart. To estimate the slab thickness, this method uses rupture stress per 1,000 pounds of axle load, the wheel spacing, and the area of contact. It does not have an approach to account for the presence of a proximate heavy axle.
Who are the designers of steel to concrete joints?
František Wald, Jan Hofmann, Ulrike Kuhlmann, Šárka Bečková, Filippo Gentili, Helena Gervásio, José Henriques, Markus Krimpmann, Ana Ožbolt, Jakob Ruopp, Ivo Schwarz, Akanshu Sharma, Luis Simoes da Silva, and Jörg van Kann. Printing by European Convention for Constructional Steelwork February 2014 178 pages, 138 figures, 32 tables III Contents
When to use a slab on grade construction?
In typical tilt-up construction, the slab-on-grade is the working surface for the lifespan of the building. Certain situations, such as otherwise inaccessible panel casting beds, demand the use of the slab as a path of access for construction vehicles like concrete trucks.
What kind of cement is used for slabjacking?
A highly dense, finely crushed limestone (sometimes combined with cement) is mixed with water in a “slurry” consistency and pumped into the holes. The material fills any “void” areas that have been created by water erosion or compaction.
How big is the hole for slab jacking?
Mud jacking or slab jacking has been in common use for about 50 years. Generally in mud jacking or slab jacking a portable pump with an assembled extension hose is carried to the location of the block to be raised. A hole of up to 3 inches in diameter is drilled into the block.
What do you put on concrete to keep it from backing out?
Some of the fasteners used contain plastic flutes on the head to prevent them from backing out once they’re in place. Simply put, concrete is a mixture of cement and aggregate that obtains its strength from the addition of water and the way it is cured.
How does slab jacking help with water erosion?
Concrete Correction’s slab jacking process of filling voids with an extremely dense material dramatically improves the compaction of the underlying soil, however, some solids i.e. peat contain high levels of organic material and may be difficult to stabilize for long periods of time. Water erosion is probably the most critical issue.