US1558782A

US1558782A - Surfacing process

Info

Publication number: US1558782A
Application number: US576887A
Authority: US
Inventors: Warren F Bleecker
Original assignee: Individual
Current assignee: Individual
Priority date: 1922-07-22
Filing date: 1922-07-22
Publication date: 1925-10-27
Anticipated expiration: 1942-10-27

Description

Oct. 27, 1925-- w. F. BLEECKER SURFACING PROCESS Filed July 22, 1922 I ".I i 9 INVENTOR. 1 f". B/eec/cen ATTORNEY.

Patented Oct. 27, 1925.

UNITED STATES 1,558,782 PATENT OFFICE.

WARREN F. BLEECKER, OF BOULDER, COLORADO.

To all whom it may concern:

Be it known that I, WARREN F. Bnnnoxnn, a citizen of the United States, residing at Boulder, in the county of Boulder andState of Colorado, have invented certain new and useful Improvements in Surfacing Processes, of which the following is a specification.

This invention relates to a process of building or repairing roads and other structures of plastic material and its main object is to provide a simple and very efiective method of causin a plastic material of the kind used in surfacing roads and building structures, to become a solid and permanently adherent part of the substance with which it is brought in contact.

My invention is particularly adapted to be employed in mending concrete roads and it is in this connection that it will hereinafter be described with reference to the accompanying drawing.

In the drawin in the several views of which corresponding parts are similarly designated,

Figure 1 represents a sectional elevation of the mechanical appliance employed in the process, in its operative relation to a defective section of a roadway; and

Figures 2 and 3 the section of the road, drawn to an exaggerated scale, showing different steps in the process of repairing the same in accordance with the present in vention..

In the drawings I have shown as at A, a section of a concrete road which was sunk, broken or otherwise rendered defective 'b long or heavy travel or other causes. t will be evident that the surface of the defe'ctive portionis rough and irregular and that in order to repair the road to its original condition, it is essential that a filling of plastic material be made to adhere to said surface so as to become a solid and permanent part of the road structure. With this object in view, I first clean the surface to be re aired, referably by washing it with a di ute acid? muriatic acid being preferred, in order to bare its silicate grains for the adherence of a plastic substance with. which it is subsequently coated. The acid removes the calcium silicate, cal- I cium carbonate andv otheracid-soluble matter from the openings, pores and crevices-of the rough and broken surface, and forms moved by flushing the surface sunracma rnocnss.

Application filed July 22,1922. Serial No. 576,887.

The cleaned surface is now dried by the ap- 1 plication of heat and subsequently covered by a bell-shaped chamber the wall of which is in air-tight contact with the contiguous circumscribmg portions of the road. This bell which has been designated in the drawings by the reference numeral 5, may be of any desired form and proportions and it functions in the process to' relieve the se tion of the structure to be repaired, from atmospheric pressure. The chamber has to this "end an annular elastic base 6 which fills up and compensates for the irregularities of the surface upon which the chamber is su ported, so as to make an air-tight joint. hould the surface be more than ordinarily irregular, the bell may be set in a narrow, shallow and annular bed of uicksetting cement such as plaster of which when hardened, affords a 'smooth and even surface upon which the bell will rest.

The chamber is by means of a conduit 7 connected with a conveniently located means for the exhaust of air from its interior; it has an opening 8 for the admission of the material to be applied to the surface over which it is placed. A window 9' afi'ords means to observe the work, a flexible gland 10 permits of the movement of a rake, brush, rabble or other tool 12 by means of which the material is applied to the surface, and an incandescent. lam 13 in connection with a source of electricity outside of the chamber, illuminates the same while the process of mending the defective surface is in progress.

After the air is exhausted from the pores and crevices of the surface over which the bell is placed, a quantity of melted bitumen (pitch or asphaltum) is introduced into the chamber through the openin 8 and is evenly spread over the broken area by means of the tool which is manipulated from outside the bell by a workman who observes the application of the material through the window 9. After the entire surface has thus been coated, air is admitted to the chamber with the result that the plastic substance is forced into the evacuated pores and crevices of the surface, and thereby takes a firm and tenacious hold of the concrete or other material of which it is composed, as shown at B in Figure 2 of the drawings. In fact it may be said that the bituminous substance being forcibly drawn into the partially evacuated myriad intercellular spaces and aris infinite number of roots and tendrils which anchor the superposed coating in place.

After the bell has been removed and while the coating is still in a liquid or semi-liquid condition the broken section of the road or other structure is filled to the level of the surrounding surface with any suitable material such as bithulithic as halt or Topeka mixture, shown at G in igure 3, which being in a class with the bituminous coating, becomes an integral and solid part thereof upon hardening.

It will be understood that the drying of the cleaned surface in the initial step of the process does not need to be complete, provided that the excess of moisture is removed so as to permit of the voids of the structure being completely filled with the bituminous coating material.

A temperature of approximately 200 F. will be found to be sufficient under most conditions. 1

My invention is as stated before, particularly suitable for mending broken and worn concrete road-surfaces, but it will be apparent from the above description that it may be used with equally satisfactory results in repairing structures made of stone, brick, wood and other materials.

What I claim and desire to secure by Letters-Patent is 1. The process of surfacing a non-bituminous structure consisting in first coating a cleaned surface with a lastic' material under a partial vacuum, sub ecting the coating to a fluid pressure whereby it is forced into the pores and crevices of the surface, and covering the coating with a plastic maiteriala 2. The process of surfacing a non-bitumr nous structure, consisting in first coating av cleaned surface with a bituminous substance under a partial vacuum, subjecting the coating to a fluid pressure whereby it; is forced into the pores and crevices of the coating with] plastic material.

surface, and covering the coating with a similar or kindred substance.

3. The process of surfacing a non-bituminous structure, consistin in first cleaning a surface by an acid was drying the surface, coating the same with a plastic substance under a partial vacuum, subjecting the coating to a fluid pressure whereby it is forced into the pores and crevices of the surface, and covering the coating with a plastic substance.

4. The process of surfacing a non-bituminous structure consisting in coatingv a cleaned surface with a bituminous substance under a partial vacuum, subjecting the coating to a fluid pressure whereby to force it into the pores and crevices of the surface, and covering the coating with" bitulithic asphalt.

5. The process of surfacing a non-bituminous structure consisting in coating a surface with a bituminous substance, under less than atmospheric pressure, exposing the coating to the atmosphere, and covering the same with a plastic substance. 6. The process of surfacing a non-bituminous structure consisting in first coating a cleaned surface of the structure with a plastic'substance under a partial vacuum, subjecting the coating to fluid-pressure whereby it is forced into the pores and crevices of the surface, and covering the" coating with bituminous material.

7. The process of surfacing a non-bituminous structure consisting in first coating a cleaned surface of the structure with a bituminous substance under a partial vacuum, subjecting the coating to fluid-pressure whereby it is forced into the pores and In testimony whereof I have 'aflixed my signature j v 'revices of the surface, and covering the a