A treatise on highway construction . t is laid, every part of it should be rammedwith a rammer weighing not less than 50 pounds, a plank being laidon the surface parallel to the curb to receive the blows of the ram-mer, and the bricks which sink below the general level should beremoved and replaced by a brick of greater depth. In place oframming by hand, a steam-roller weighing not to exceed 5 tonsmay be used; the rolling should be continued until the brick arebrought to an even surface. Soft brick may be detected after therolling by wetting the pavement; they retain moisture longer thanthe ha
A treatise on highway construction . t is laid, every part of it should be rammedwith a rammer weighing not less than 50 pounds, a plank being laidon the surface parallel to the curb to receive the blows of the ram-mer, and the bricks which sink below the general level should beremoved and replaced by a brick of greater depth. In place oframming by hand, a steam-roller weighing not to exceed 5 tonsmay be used; the rolling should be continued until the brick arebrought to an even surface. Soft brick may be detected after therolling by wetting the pavement; they retain moisture longer thanthe harder ones, and thus can be readily detected. After the ram-ming and rectification Portland-cement grout should be poured intothe joints until it appears on the surface, then the whole surfaceshould be covered with a layer of dry sand one-half inch deep. At 264 HIGHWAY CONSTEUCTION. street intersections the courses should be laid nieeting at an aiigle,as shown in Fig. 19 or 19a, so that the courses may not run parallelto the Fig. 19a.—Plan of Brick Paving at Street Intersections. uaying the brick in courses running diagonally with the lengthof the street has been advocated and tried in some cities. (Triedin Toronto, Canada, and abandoned.) The reasons advanced infavor of this method are: Less noise, increased bearing surface forwheels on each brick along the line of travel, and consequently lesswear. The reasons in favor of laying the tricks at right angles to thelength of the street are: Saving in cost both in labor and material BEICK PAVEMENTS. 265 (diagonal courses cause considerable waste in cutting the brick tofit at the curb); better foothold and no appreciable increase in wearor noise. The laying of bricks lengthwise adjoining the curb to form agutter is detrimental and productive of a rut. 319. Joint-filling.—The character of the material used in fillingthe joints between the brick has considerable influence on the suc-cess and durability of ihe pavement. V
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