US1315749A - Faying fob streets and the like - Google Patents

Description

R. C. STUBBS.

PAVING FOR STREETS AND THE LIKE.

APPLICATION FILED sEPT.14,1916.

1 ,3 1 5,749. PatentedSept. 9, 1919.

. t kom w15 ROBERT C.

STUBBS, OF DALLAS, TEXAS.

PAVING FOR STREETS AND THE LIKE.

Specification of Letters Patent.

Patented Sept. 9, 191.9.

Application led September 14, 1916. Serial No. 120,004..l

can be laid at a reasonable cost. Anotherobject is to provide a paving which can be re-surfaced at small cost and to provide a wearing surface which will protect the main body of the paving slab from the deleterious eifects of changes inthe weather while the slab is in a state ofcuring as well as protecting the slab from the effects of traiiic. The improved paving is made capable of sustaining heavy trailic by the process set forth in the patent granted to me on April 13, 1909, No, 918,988. other objects and advantages will be fully explained in the following description and the invention will be more fully pointed out in the claims.

Reference is had to the accompanying drawings which form a part of this application.

Figure 1 is a vertical section of a section of paving, showing the condition of the materials as the paving is just being completed. Fig. 2 is a vertical section of a completed section of paving.

Similar characters of reference are used to indicate the same parte throughout the several views.

The paving is illustrated in the drawings as being laid on the surface of graded earth i. Concrete is prepared in the usual manner with cement, sand, stone, and water, but with an increase in cement, sand and water in order to provide a slight surplus of mortar. A concrete slab 2 is formed on the grade 1 by placing thereon enough plastic concrete to make a paving of the desired thickness. is laid, and before the concrete is cured or becomes hard or set, a wear resisting sur' face is formed by placing additional stone or crushed granite 3 on the upper surface of the concrete and then forcing the additional stones down into the plastic concrete by placing thereon a platform and then vi- After the plastic concrete brating the stones 3 and the Whole slab of concrete with pressure7 as set forth in the above noted patent until the stones are sunk into the surface of the concrete. More or less pressure can be used but the vibration and pressure must be simultaneously applied.' The slab is then ready to be cured. In order that the curing may not be interfered with, a wearing coating 4 is placed on top of the slab EZ to protect the slab from the wear of the trailic or travel while being cured and also to prevent heat or cold from vinterfering with the curing of the slab, and 'preventing the moisture from escaping from the interior of the mass. The coating or wearing surface 4 may be thick enough to last several years. By the time the surface 4 is worn oft', the concrete slab will be thoroughly cured and the slab will have a smooth `hard surface composed of the stones ein bedded inthe concrete. The stone will be so embedded in the concrete and the concrete will be `So crystalized about the stone that the stone and concrete will be as one material and will form a surface that will be strong enough to resist the heaviest traflic and will resist Wear so that the life of the paving will be prolonged. A surface will also be formed upon which a new wearing surface may be placed at very small cost. Thus a slab is formed which may be used simply as a substratum or which can be used as the surface paving. It may be used a sub-stratum and recovered with a wearing surface of bituminous or asphaltic consistency. Concrete will not reach its full power of Tesistance until several months, and. when used for street paving, must be given every pos- Y sible advantage and protection before it is exposed to the severe test of active traffic. The surface coat 4. answers the .purpose of protecting the new laid concrete.

What I claim, is:-

1. The herein described method of forrn ing paving which consists in laying concrete on a prepared sub-grade, placingof stones on the surface of said concrete, and forcing the same b v vibration and pressure into said concrete while the concrete is in plastic condition for causing the stone to become an integral part of the mass.

2. The herein described method of formin paving for streets and like purposes w ich consists in laying concrete containing a surplus of mortar on a prepared subgrade, placing stones on the surface of the conc-rete and forcing the same down by y1- bration and pressure simultaneously applied Yinto the concrete immediately after the concrete is laid thereby forcing the surplus mortar out of the concrete and forcing the stones in close relation.

3. The herein described method of forming paving for street-s and like purposes which consists in laying concrete containing a surplus of moisture on a prepared sub-grade, placing stones on the surface of the concrete and forcing the same by vibration and pressure down into the concrete immediately after the concrete is laid 'thereby forcingn the surplns mortar out othe concrete, and foinmimggn a moisture prodi surface course by the addition of surface,

grade to form a slab, placing stones on the surface of the concrete and forcingthe same down thereinby Vibration and pressure im.- mediately after the concrete is laid, .causing the mortar of the concrete to be compacteol on all the surface of eat-listone for creating apermanent Wearing surface.`

lln testimony whereof, I set my hand, this 9th day of September, 1916.

RUEERT C. STUBBS.

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