A treatise on architecture and building construction . ak in the foundationwall /, as shown. 1211, Cement sidewalks should be laid as follows:The ground should be leveled off about 10 inches below thefinished grade of the walk, and well settled by ramming. Afoundation 5 inches thick should then be laid, of eithercoarse gravel, stone chips, sand, or coal ashes, well tamped,or rolled with a heavy roller. The concrete should then beprepared in the proportion of 1 part of cement, 2 parts ofsand, and 3 parts of gravel, mixed dry; then a sufficientquantity of water is added to make a stiff mortar. T
A treatise on architecture and building construction . ak in the foundationwall /, as shown. 1211, Cement sidewalks should be laid as follows:The ground should be leveled off about 10 inches below thefinished grade of the walk, and well settled by ramming. Afoundation 5 inches thick should then be laid, of eithercoarse gravel, stone chips, sand, or coal ashes, well tamped,or rolled with a heavy roller. The concrete should then beprepared in the proportion of 1 part of cement, 2 parts ofsand, and 3 parts of gravel, mixed dry; then a sufficientquantity of water is added to make a stiff mortar. Thisconcrete should be spread in a layer from 3 to 4 inches thick,and should be well tamped. Before the concrete has set,the top or finishing coat should be laid, and only as muchconcrete should be used as can be covered with cement onthe same day, for if the concrete gets dry on top, the finish-ing coat will not adhere to it. The top coat should beprepared by mixing 1 part of the best Portland cement, and d -^ Iffmi&ik^)^.:: :i^—:{:V::^^-^:^. Fig. 51. 1 part of fine sand or 1 part clean, sharp, crushed granite orflint rock. The materials should be thoroughly mixed dry,and water then added to give the consistency of plasticmortar. It should be applied with a trowel, to the thick-ness of 1 inch, and carefully smoothed and leveled on topbetween straightedges laid as guides. Used in the aboveproportion, 1 barrel of Portland cement will cover about 30square feet of pavement. Fig. 51 shows a section of aconcrete pavement; a shows the ashes or spalls; /;, thesecond coat of cement and gravel or stone; c, the finishing § 7 MASONRY. 69 coat of Portland cement; d, the street having; r, the build-ing- line; and _/, the soil. i;i8. Brick side^valks should be laid with good, hard,paving brick, sound and square, laid flat, herring-bonefashion, on a bed of sand from 4 to 6 inches thick. Afterthe bricks are laid and graded (which should be about 1 inchto 10 feet, to drain the water to the
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Keywords: ., bo, bookcentury1800, booksubjectarchitecture, booksubjectbuilding
