US2210444A - Reinforcement of concrete or the like - Google Patents

Description

Aug. 6, 1940.

G. 0. CASE REINFORCEMENT 0F CONCRETE OR THE LIKE Filed April 16, 1958 Patented Aug. 6, 1940 UNITED STATES REINFORCEMENT 0F GONORETET on THE LIKE Gerald Otley Case, Georgetown, Demerara, British: Guiana,

assignor to Lignocrete Ltd.,

Georgetown, Demerara, British Guiana Application April 16, 1938, Serial No. 202,549 In British Guiana December 9, 1937 3 Claims.

This invention relates to the reinforcement of mass concrete structures, beams, piles, columns, slabs, or the like.

The object of this invention is to remedy defects inherent in former methods and/or to cheapen the cost of manufacture or construction. 7

For example, previous patents for reinforcing ordinary concrete with wood rods rigidly connected together have stipulated that the rods be treated with a suitable preservative or soaked in water before filling in the concrete. Such methods are either unnecessary or not practicable in commercial production. Preservatives do not prevent the wood rods absorbing water from wet concrete mixtures before setting has taken place and the result is that the timber rods expand and injure the set of the concrete.

If the timber rods are soaked in water before I insertion in the wet concrete mixture, the exact amount of water must be absorbed by the Wood rods to prevent injury to the concrete in setting, and this is impossible incommercial practice as the seasoned wood rods have a variant water content. If the wood rods are soaked too long shrinkage subsequently takes place weakening the bond between the concrete and the rods. If the timber rods are soaked too short a time they take up water from the wet concrete mixture before final setting has taken place and in expanding injure the set of the concrete.

According to this invention mass concrete or precast concrete units, made with Portland cement or ciment fondu and any suitable aggregate of sand, stone, gravel, broken brick, or mixtures of these materials or chemically treated sawdust and the necessary gauging water are reinforced with wood rods previously soaked in a 5 to 10 Beaum solution of sodium chloride.

In order that my invention may be clearly understood and carried into effect I now proceed to describe in detail suitable methods of reinforcing a road, a beam and a pile.

Figure 1 shows a road in longitudinal section according to the invention,

Figures 2 and 3 show two different forms of a beam construction,

Figures 2a and 3a are cross sectional views of Figures 2 and 3 respectively,

Figure 4 shows a constructional form of a pile, and

Figure 4a is a cross sectional view of Figure 4.

Figure 1 illustrates a road or pavementconstructed in accordance with my invention. The concrete (1 reinforced with timber rods b saturated with the said solution of sodium chloride before placing in position.

Figures 2, 2a, 3 and 3a illustrate beams and Figures 4 and 4a, a sheet pile. In Figures 2, 2a., 4 and 4a a represents the concrete and b the timber rods saturated with the said solution of sodium chloride before placing in position.

In Figures 3 and 3a 0; represents the concrete and b and c the timber reinforcements saturated with the said solution of sodium chloride before placing in position.

In Figures 4 and 4a 0. represents the concrete and b and c the timber reinforcements saturated with the said solution of sodium chloride before placing in position.

For ordinary work a suitable mixture for the concrete is 4 parts broken stone, 2 parts sand and 1 part Portland cement.

In accordance with this invention wood laths for use in ceilings or walls are soaked in a 5 to 10 Beaum solution of sodium chloride before fixing in position and applying the cement plaster. For plaster work I usually use from 2 to 3 parts of sand and 1 part of Portland cement adding gauging water until the plaster is of a suitable consistency to be readily applied with ordinary plasterers tools.

What I claim is- 1. In theconstruction of roads, buildings, walls, ceilings, columnapiles, slabs and other structures, of bonding material preferably concrete,

ment and gauging Water, of timber reinforcements previously saturated in a 5 to 10 Beaum solution of sodium chloride whereby a condition of equilibrium is reached in which neither the timber reinforcements nor the cementitious material absorb or give up water. 3. In the construction of roads, buildings, wall ceilings, columns, piles, slabs and other structures, embodying sand, gravel), broken stone, broken brick, chemically treated sawdust, or a mixture of any of these materials, alumina ce- I ment such as ciment fondu, and gauging water, of timber reinforcements previously saturated in a 5 to 10 Beaum solution of sodium chloride I whereby a condition of equilibrium is reached in which neither the timber reinforcements nor the cementitious material absorb or give up water.

GERALD OTLEY CASE.

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