US695423A - Street-pavement. - Google Patents

Description

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UNITED STATEse PATENT OFFICE.

FREDERICK J. WARREN, oF NEWTON, MASSACHUSETTS.

STREET-PAVEM ENT.

`SPSECI1=`IC2AUJION forming part of Letters Patent N o. 695,423, dated March 11, 1902.

Application filed January 10, 1902. Serial No. 89,164. (No specimens.)

To ctZZ- whom it may concern:

Be it known that I, FREDERICK J. WARREN, a citizen of the United States, and a resident of Newton, in the county of Middlesex and State of Massachusetts, haveiinvented a new;`

and useful Improvementin Street-Pavements,

act description, referencebeing hadfto theV accompanying drawings,fforming a part'of this specification, inexplainingitsinature.

The invention relates to any type of street pavement or roadway which is adapted to be surface-finished in the manner hereinafter in,

support, or thevportion ofitwto which the Y Weariug-surfaceis applied, would'be of a bi#V tuminous nature andwould furnish the principal part of the body of the pavement, or at any rate the upper part thereof, and my invention has nothing to do with -this portion of the pavement, excepting that in order to.z

use my invention most vsuccessfully it is necessary thatthis part of the pavement should be suitably constructed. To the surface of a pavement so prepared I apply a wearingsurface consisting of a bituminous cement relatively pure and combined with iron or steel filings, chips, or particles intimately associated with one or more layers of coatings of the bituminous cement. The cement must be in a fluid condition and may be either hot or cold when applied. lt serves to combine together the iron or steel fragments and to also seal the more or less cellular structure of the foundation against atmospheric infinences. The nature of the metal particles is such that when combinedA with the cement there is formedatough, hard, durable water and weather proof surfacingwhich readily unites with the foundationupon which it is placed and which possesses enormous power of resisting wear of traffic, in conjunction with great preservative power in protecting the main body of the pavement from the ordinary destructive iniiuences aside from traffic wear to which it is subjected. i

I Will now describe the Invention 1n connection3witl1the drawings forming a part of f this sfpecificatiomin whichv Figure'l isa'pview.incrossvertical section .of Whichthe following is afull, clear, and ex' fof.l al street-pavement havingthe features of f1myinventionf..Fig.2;is afview in vertical section of ,a-'portionv Vthereof enlarged.

'ln lthe drawingsV a' conventional pavement lbitu minous composition,consisting of asphalt,

coal-tar,or any other similar vehicle combined with Van earthy, concrete, or stony base and in the usual proportions. l This section of the pavement is prepared and laid in the ordinary manner and ordinarily would supply the or dinary or wearing section of the pavement. A pavement of this composition is more or less cellular or filled with pores and to that extent is defective in that it invites attacks from atmosphericiniuences. ,Tothis section of the pavement :is appliedfthey wearing-surface B. This consists of any desired number of coats of fluid bitumen, either hot or cold, as maybe desired, and affixed to the sur'- face of the said section Binany desired man- 4combined therewith and to evenly and uniformlycover it. With' one or more of these coatings of bitumen l combine iron or steel filings, particles, or fragments in any desired proportion and so as to make a composition jwhich shall have a large proportion of its Abody of metal.

This is applied to the surface in the same manner that the other coatings are applied and may be used without Y them, if desired, and may be covered by one or more of them, if required. The effect is to produce a pavement having a wearing-surface which has the power to resisugitraftic wear which iron or steel may have and's'gapplied to the supporting-foundation as net1 to expose large pieces or v sections of the'metal in an objectionable way, but which so combine as to make a continuous metal and bituloo tion is maintained and the durability ot' the` entire pavement is very much increased.

I have spoken ofthe use of iron and steel lings, particles, and pieces, and I would say that the same waste of any other metal may be used for this purpose and that they may be combined with the iron and the steel ilings, particles, and pieces, or not, as may be desired, and that the iron may be used apart from the steel,and vice versa,when preferred.

In lieu of mixing the iro'n and steel chips and particles with a bituminous cement in ad- Vance of the application ofthe metallized coinpound to the surface of the pavement or foundation I would say that they may be applied separately to the said pavement or foundation surface and combined together thereon, in which event there would be applied the bituminous cement in one or more coatings, and the metal chips or pieces would be spread thereon to any desired thickness or extent and then combined therewith by sweeping, pressure, or other mechanical means and by other coats or coatings of the bituminous cement, and this method of constructing the surface may be continued to any desired extent by the application of subsequent layers or coatings to the bituminous cement and of the metal chips or pieces until any desired thickness of wearing surface or body is secured.

In some instances grains of stone, cracked or otherwise, may be combined with the metal chips or filings and to any extent desired, so that the wearing-surface would then consist of iron or steel chips and filings, or either, stonygrains orelements, and a combining vehicle of bituminous cement.

Having thus fully described my invention, I claim and desire to secure by Letters Patent of the United Statesl. The application to the wearing-surface of a bituminous street-pavement havinga ce1- lular or porous character for the purpose of closing its pores, preserving its life and increasing its resistance to wear, of a cell and pore sealing coating of bituminous cement and iron, steel or other metal filings, chips or particles.

2. The application to the Wearing-surface of a bituminous street-pavement of a thin coating of bituminous cement applied thereto in a plastic condition and combined while plastic with metal filings, chips or particles and whereby the Wearing-surface is provided with increased durability.

3. The application to the wearing-surface of a bituminous street-pavement of a layer or coating of relatively pure bitumen, a layer or coating of iron, steel or other metal filings,

chips or particles and a bituminous cement intimately commingled and a layer or coatd ing of relatively pure bitumen applied to the surface of the metal and bituminous layer.

4. The application to the Wearing-surface of a bituminous street-pavementof a coating consisting of a composition of bitumen, stony ingredients and iron or steel filings, chips or particles mingled to form a homogeneous body of stone, metal and bitumen, and whereby the wearing-'surface of the pavement is provided with increased durability and also with frictional properties.

FREDERICK J. WARREN.

Witnesses:

F. F. RAYMOND, 2d, J. M. DoLAN.

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