New answers tagged

0

Fill it with water. It looks like it's solid on both sides and at both ends. Fill the water at the same time as the concrete -- you want the water level to be below the concrete level to avoid leakage and/or washout on the cement pour side. On the other sides a slow leak doesn't matter. After the concrete is poured, a slow leak on the concrete side won't ...


7

The air entrained in the concrete causes discontinuous voids, which will not cause water to penetrate the concrete. Water will permeate through the bleeding pores which are continuous cavities. The entrained air bubbles are small and will only allow space for the freezing water to expand.


14

Where concrete is exposed to water, the water is going to permeate concrete no matter what you do (for the most part). The voids introduced by air entrainment allow the water some place to expand into when it does eventually freeze, thereby reducing the pressure on the concrete to crack. Edit 2021/02/17 to add some supplementary information: ACI 201-16, &...


0

By definition, bearing stress is the resulting stress between two rigid bodies in contact. It is relevant to concrete only because of its brittle nature, and prone to crack (weak in shear). On the other hand, reinforcing steel does not have such weakness, while it shares/feels the stress, the result rarely be meaningful and detrimental. So for all practical ...


3

Foundation's task is not just to support gravity loads, it should resist lateral loads, wind and earthquake, as well. Wind loads are dependent on the geometry of the building and seismic loads are dependent on the mass distribution throughout the buliding. For example of you will show access to the roof of your third floor container for its use as a deck, ...


Top 50 recent answers are included