In case the smaller concrete precast basement stairs aggregates are to be exposed, the concrete precast basement stairs should be carefully spaded between-the concrete precast basement stairs and the surface in the form, as this brings to the surface finish particles of sand and the cement itself. In case the larger concrete precast basement stairs aggregates are to be exposed, no spading should be done, but all the tamping of the concrete precast basement stairs should be done in the middle of the wall. This causes the pushing of the larger concrete precast basement stairs aggregates (stones) against the surface of the form.
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