On small properties the cement driveway is advisable and superior to any other. Oftentimes two cement tracks, with sod between, will take care of all traffic and yet apparently reduce the space taken up by the drive.
Most of the driveways built today are those which are known as Telford roads (Fig. 56). These are usually constructed of twelve inches of stone over all. An eight-inch foundation is provided of hard quarry stone, laid on edge, with the longest dimension placed at a right angle to the side line of the drive. Very often this large stone can be found on the property (Fig. 57). After the stones are placed they should be gone over with napping hammers and made fairly even by breaking off the irregular edges; the pieces of stone so broken off should be used to fill in chinks. Over this should be placed three inches of one and one-half inch stone. Then a light covering of three-quarter inch stone may be placed as a binder and finished with clean breaker dust. The drive should be rolled before and after placing the three-quarter inch stone, with a roller weighing not less than five tons. The three-quarter inch stone and the dust should never be mixed together; the dust will work through and the stone find the surface, making it rough and troublesome. When rolling the finished surface it should be wetted constantly until a wave of water appears in front of the roller.
Fig. 57. - Very often the large stone for the base course in the drive may be quarried on the property. - See page 58.
AN IDEAL BITUMINOUS ROAD.
Fig. 58. - A "Tarvia" macadam road. Free from dust and of good wearing qualities. See page 59.
The automobile is a new factor to be figured with in the construction of drives, as we find the waterbound roads are not very
CONSTRUCTION OF A CEMENT APPROACH.
Fig. 59. - Showing the construction of a cement driveway approach satisfactory when subjected to the wear and tear of motor travel. Dust prevention must also be considered.
To strengthen the wearing surface of the macadam and reduce the amount of dust, some kind of refined tar is best (Fig. 58). There are many such preparations on the market today and each carries with it proper specifications for applying. This should preferably be applied during hot weather, the penetration then being more thorough.
In some localities it is impossible to secure a stone with any adhesive qualities. Where such a condition exists run a cement grout, consisting of one part Portland cement to three parts of sharp sand, over the surface. Over this place a thin layer of the breaker dust and go over with a splint broom, thus roughening up the surface to prevent skidding. This makes a good, practical driveway that will stand a lot of traffic without unraveling or costing anything for maintenance. The bituolithic binders may be used for the same purpose provided the stone is of cubical form.