BRICK EOADS. 
Table 1. — Ratio of thickness of cushions to width of roadway. 
21 
Width of roadway 
(feet). 
Thick- 
ness of 
cushion 
(inches). 
20 or less 
h 
3 
i 
20 to 30 
30 to 40 
Over 40 
Plates IV to VIII, and Plate IX, figure 1, show the various steps 
in the construction of a brick pavement. Plate IX, figure 2, and 
Plate X, figure 1, show the finished pavement as it should appear, 
and Plate X, figure 2, shows the advantage possessed by grout-filled 
joints over joints filled with a soft material. The partial or total 
failures shown in Plates I, II, and XI are intended to emphasize the 
importance of employing proper methods, materials, and workman- 
ship in brick-pavement construction. 
" MONOLITHIC " BRICK PAVEMENTS. 
During the year 1915 several sections of brick road were con- 
structed in the vicinity of Paris, 111., in accordance with an unusual 
method which offers at least partial promise of showing advantages 
not possessed by the common methods of construction now in use. 
The novel features of this work are: (1) The brick are laid upon a 
green concrete base with no intervening bedding other than a very 
thin layer of dry mortar spread by means of a specially designed 
templet; (2) no curbs are employed; (3) the construction of the base, 
the laying of the brick, and the grouting all proceed sufficiently close 
together to make the pavement practically a monolith, from which 
fact this type of brick pavement has been designated "monolithic." 
The advantages which the new type of brick pavement appears to 
possess may be briefly enumerated as follows : 
(1) Economy in cost of construction. In addition to the saving in 
materials and labor effected by omitting the curbs, sand bedding, 
and expansion joints the labor cost can probably be somewhat further 
reduced by having the construction of the concrete base and the 
laying of the brick carried on under the same organization. The 
reduction in the time during which it is necessary to keep the high- 
way closed to traffic, while the improvement is being made, is also 
an indirect economy. 
(2) The elimination of the sand bedding would appear to be of 
advantage from a construction standpoint, because it is liable to be 
disturbed and to cause trouble in case of a heavy rain during con- 
struction. Sometimes, even after the pavement is completed, the 
sand is disturbed by water getting in between the brick and the base 
