BRICK ROADS. 

 Table 1. — Ratio of thickness of cushions to loidth of roadway. 



21 



Width of roadway 

 (feet). 



TMck- 

 ness of 

 cushion 

 (inches). 



20 or less 



20 to 30 



1 



i 

 1 



30 to 40 . 



Over 40 





Plates TV 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 sliould 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 imusual 

 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 f oUoavs : 



(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 Avhich 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 



