US1770154A

US1770154A - Method of forming alpha reenforced concrete construction

Info

Publication number: US1770154A
Application number: US371334A
Authority: US
Inventors: William P Day
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-06-17
Filing date: 1929-06-17
Publication date: 1930-07-08
Anticipated expiration: 1947-07-08

Description

W. P. DAY

July 8, 1930.

METHOD OF FORMING A REENFORCED CONCRETE CONSTRUCTION Filed June 17, 1929 gwuewtoz vide a method of Patented July 8, 1930 UNITED STATES WILLIAM 1?. DAY, OF CLEVELAND HEIGHTS, OHIO METHOD OF FORMING A BEENFORGED CONCRETE CONSTRUCTION Application filed .Tune 17,

This invention relates to a method of forming a reenforced concrete construction and is of general application.

The main object of the invention is to proforming a steel reinforced concrete construction which will cause substantially all voids in the concrete to be eliminated and which will cause the concrete to adhere to or bond with the steel reenforcement in such a manner as to produce a very strong construction.

A further object of the invention is to provide a method of forming a steel reenforced concrete construction which is Well, adapted for use in connection with buildings, bridges, railway roadbed construction, and in fact, in any connection where it is desirable to make use of reenforced concrete.

A still further object of the invention is to provide a method of applying concrete to the steel work of a building, bridge or similar construction in such a manner as to cause the concrete to firmly bond with the steel and eliminate voids or air pockets.

Further and more limited objects of the invention will appear as the description proceeds and by reference to the accompanying drawing disclosing a vertical sectional view of a portion of a steel frame work of a building, bridge or similar structure.

Heretofore it has been quite difficult and practically impossible to obtain a reenforced concrete construction which contains no voids or air pockets. Moreover, in cases where the steel reenforcement projects out of the concrete, it has been very diflicult and practically impossible to prevent water from seeping in adjacent the steel frame work. Water deteriorates the concrete construction and, due to the freezing and thawing action, tends to produce cracks or crevices. According to my improved method of forming the construction, I have eliminated this difliculty by vibrating or tamping the steel reenforcement while the concrete is still green or plastic; and continuing this vibration to cause the concrete to settle and to bond with the reenforcement. This vibration also causes the concrete and particles of stone to settle, thus eliminating air pockets and voids 'to bond with the steel reenforcement. The

. additional concrete PATENT OFFICE i929. Serial No. 371,334.

between the particles of stone. Moreover, by eliminating these voids and by providing a more perfect bond between the steel and concrete, I greatly increase the structures ability to shed water and therefore greatly prolong the life of the structure asa whole. According to the preferred embodiment of this invention, I first substantially enclose the steel reenforcement with a mold. Soft concrete is then poured into the mold and preferably simultaneously with the pouring of the concrete I vibrate or tamp the reenforcement, thus causing the concreteto settle and to flow evenly throughout the mold and vibration of the reenforcement may be produced in any desired manner, as for example, by means of a mechanical or pneumatic vibrator or pulsator. The vibration is continued until no further settling of the concrete is noticeable to cause the concrete to bond with the steel. The concrete will adhere to the steel and there will be no cracks or crevices adjacent the steel reenforcement. Hence there will be no chance of water seeping in.

In the drawing 1 have disclosed somewhat diagrammatically a portion of a building or other structure embodying steel beams or girders 1 and 2. In carrying out my 8 method I first substantially enclose the beams or girders with a mold 3. Soft concrete is then poured into the mold and preferably simultaneous with the pouring operation I vibrate the beams by means of one or

more vibrators

4 and 5 which may be operated either mechanically or pneumatically. The vibration is continued to cause the concrete to adhere to and form intimate contact withthe steel and as the concrete settles in the mold 9 is added. This operation is continued until the mold'is filled. The concrete is allowed to harden in this position and the mold is subsequently removed. if desired, the mold may be first partially filled with loose stone and cement-grout poured in on top. of the stone, the reenforcement being vibrated during the pouring of the concrete and until the concrete has thoroughly permeated the stone and filled all i voids therein. The number and the force of the blows imparted to the steel reenforcement may of the construction. With this method, 1 am able to use from five to fifteen-percent more concrete in the same space and thereby greatly increase the strength of the construction.

Various changes may be made in the specific manner of carrying out the several steps set forth, as well as in the manner of vibrating the reenforcement, without departing from the spirit of my invention; and while I have used the term concrete in this specification, I do not wish to be limited to any specific mixture of sand, stone, cement, or other material, but have used the term generically to mean any mixture of bonding material, such as phalt, with sand, gravel, stone or other material. It is, therefore, understood that the invention is limited only in accordance with the scope of the appended claims. It will now be clear that I have providedla method of forming a reenforced concrete'construction which Will accomplish the objtcts of the invention as hereinbefore stated.

Having thus described my invention, what I claim is: A

1. The method of forming a steel reen- 'forced concrete construction which consists in substantially enclosing the metal reenforcement with a mold, pouring soft concrete within the mold and simultaneously vibrating the reenforcement, and continuing such vibration to cause the concrete to settle and bond with the reenforcement, such vibrations being imparted directly to the reenforcement.

2. The method of forming a steel reenforced concrete construction which consists in substantially surrounding the metal reenforcement with a mold, pouring soft concrete within the mold and simultaneously tapping the reenforcement, and continuing such tapping to cause the concrete to settle and to bondwith the steel reenforcement.

3. The method of forming a reenforce'd concrete construction which consists in substantiall enclosing a metal ree'nforcement with so t concrete and vibrating the reenforcement while the concrete is setting to cause the concrete to settle and to bond with the metal reenforce'ment, such vibrations being imparted directly to the reenforcement.

4:. The method of forming a metal reenforced concrete construction which consists in substantiallysurrounding the reenforcement with a mold, substantially filling the mold with loose particles of stone, then pouring soft concrete on the loose stone and simultaneously vibrating the reenforcement to cause the concrete the stone and to eliminate voids, and vibrating the reenforcement to cause the concrete be varied according to the nature begins to set, such cement, cement-grout or asto thoroughly permeate to thoroughly permeate the stone and to bond with the reenforcement, said vibrations being imparted directly to the reenforcement.

5. The method of applying concrete to ametal frame work which consists in enclosing the frame work with a mold, pouring concrete within the mold and vibrating the frame work while the concrete is soft, and continuing such vibration'until the concrete begins to set, such vibrations being imparted directly to the framework.

6. The method of applying concrete to the steel girders or beams of a steel 'frame work which consists in enclosing the girders or beams with a mold, pouring soft concrete within the mold and simultaneously vibrating the girders or beams until the concrete vibrations being imparted directly to the girders or beams.

7. The method of forming a metal reenforced concrete construction which consists in embedding the metal reenforcement in wet concrete and, while the concrete is still green or plastic, vibrating reenforcement for a suflicient period of time to cause the concrete to settle and to bond with the reen'forcement, such vibrations being applied directly to the reenforcement.

8. The method of forming a steel reenforced concrete construction which consists in covering the steel reenforcement with a I mass of wet concrete and While the concrete is still plastic imparting suflicient pulsations or vibrations to the steel reenforcement to cause the concrete to settle and to bond with the reenforcement and to substantially eliminate voids in the construction, such vibrations being applied directly to the reenforce ment.

. 9. The method of forming a concrete construction having a metal reenforcement which includes partially surrounding the reenforcement with wet concrete and then apsignature. 1

WILLIAM P. DAY.