Cyclopedia of architecture, carpentry, and building : a general reference work (1912)
American Technical Society · Chicago : American Technical Society · leaf 216
as coal ashes, granulatedslag, or gravel, are used, under-drains of tile should be laid tothe curb drains or gutters, so asto prevent water accumulatingand freezing under the walkand breaking the block. 176 MASONRY AND REINFORCED CONCRETE 165 248. Concrete Base. The concrete for the base of walks… … Fig. 77. Double Arch Culvert, 14 by 5}^-Foot. but this mixture seems to be richer than what is generally required.The concrete should be thoroughly mixed and rammed, and cut intouniform blocks. See Fig. 78. The size of the broken stone orgravel should not be larger than one inch, vary-ing in size…
Architecture · Building
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