Publisher's Synopsis
Excerpt from The Electrical News, Vol. 31: January 1, 1922
In cases where asphalt paving is adopted, the paving base is poured in two courses, the bottom course being allowed to stand for a day before the top lift is poured. This will make it possible to chip off the top course more easily when the asphalt wears out and it is desired to replace it with granite blocks. The granite blocks are laid on a cushion of cement and sand and are grouted with cement grout.
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