Publisher's Synopsis
Excerpt from Concrete Troughs, Tanks, Hog Wallows, Manure Pits and Cisterns
After having selected clean, well graded materials and mixed them in correct proportions, enough water must be added to make a concrete of quaky or jelly-like consistency. When placed in the forms, this quaky mixture must be thoroughly spaded, both between and against form faces, to produce a dense, watertight mass with smooth surfaces. Tapping the forms while placing the concrete will help to produce a smooth surface and will also release air bubbles which may have been trapped in the concrete while mixing.
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