# US 4,397,263 A · Device for effecting protective treatments on manufacture in concrete in operation as well as in prefabrication

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- Number: US 4,397,263 A
- Document ID: US4397263A
- Status: Granted
- Kind: A
- Application number: 06/270,890
- Filed: 1981-06-05
- Granted: 1983-08-09
- Earliest claimed: 1980-10-14
- Assignees: Italcementi-Fabriche Riunite Cemento S.p.A.
- Inventors: Arturo Rio; Gennaro Guala; Stefano Biagini
- Web page: https://patentgrep.com/patent/US4397263A

## CPC

- E01D 22/00: Methods or apparatus for repairing or strengthening existing bridges {(electrochemical desalination or re-alkalisation C04B41/00); Methods or apparatus for dismantling bridges}
- B28B 11/04: for coating {or applying engobing layers}(glazing, engobing C04B)
- E01C 7/147: {Repairing concrete pavings, e.g. joining cracked road sections by dowels, applying a new concrete covering (applying thin surface layers with other binder E01C7/35; repairing pavings in general E01C11/005; roughening by means of tools E01C11/24)}
- E01C 7/356: {with exclusively synthetic resin as a binder; Aggregate, fillers or other additives for application on or in the surface of toppings having exclusively synthetic resin as binder}
- E01C 23/00: Auxiliary devices or arrangements for constructing, repairing, reconditioning, or taking-up road or like surfaces (apparatus for reconditioning of salvaged non-hydraulic compositions {for- in plant recycling of salvaged bituminous mixtures} E01C19/10)
- E01C 23/14: for heating or drying foundation, paving, or materials thereon, e.g. paint (E01C23/03 takes precedence; heating or drying devices incorporated in the paving E01C11/26; surface {soil} stabilisation by fusing, calcining or burning soil in situ E01C21/02; for street cleaning E01H1/08; melting snow or ice on surfacing E01H5/10)
- E01D: CONSTRUCTION OF BRIDGES, {ELEVATED ROADWAYS} OR VIADUCTS; ASSEMBLY OF BRIDGES (bridges extending between terminal buildings and aircraft for embarking or disembarking passengers B64F1/305; {tracks for special kinds of railways E01B25/00; culverts E01F5/005})
- B28B: SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER (foundry moulding B22C; working stone or stone-like material B28D; shaping of substances in a plastic state, in general B29C; making layered products not composed wholly of these substances B32B)
- E01C: CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR (forming roads or like surfaces by compacting or grading snow or ice E01H)

## Abstract

Device for effecting protective treatments on manufactures in concrete constituted of the combination in a single apparatus of a panel for the heating of the surface to be treated provided with means for establishing on the surface itself a constant flow of hot air with the possibility to regulate the temperature, and of an assembly being apt to impregnate with a catalyzed monomer the surface of the already heat-treated concrete and to polymerize with hot water the catalyzed monomer once it has been absorbed by the manufacture itself.

## Claims

### Claim 1

A device for protecting and rendering impermeable a concrete manufacture on use, comprising
(a) heating means for dehydrating a surface layer of said manufacture whereby pores are formed therein, said heating means comprising a radiant plate arranged at a space from said concrete manufacture, a combustion chamber, a spiral tube coil containing diathermic oil arranged within said combustion chamber above said radiant plate, a circulating pump for circulating said diathermic oil within said spiral tube coil, a burner means for selectively heating to a desired temperature said spiral tube coil and thereby said radiant plate and a blower means for circulating a flow of hot air within said space between said radiant plate and said concrete manufacture;
(b) means for impregnating said surface layer with a liquid monomer whereby said monomer penetrates said pores;
(c) means for supplying water to said surface layer impregnated with said liquid monomer for polymerizing said monomer under said water which is heated by said heating means to a temperature range of substantially 80.degree. C. to 90.degree. C.; and
(d) a peripheral frame means abutting said concrete manufacture and isolating said space from the ambient atmosphere.

### Claim 2 (depends on 1)

A device according to claim 1, wherein said impregnating means comprises a tank containing said liquid monomer, a flexible hose supplying said monomer into said space between said radiant plate and said concrete manufacture, and a recovery pump for recovering excess monomer following said impregnation.

### Claim 3 (depends on 1)

A device according to claim 1, wherein said polymerization means comprises a water tank adjacent to said heating means and a tube for supplying water preheated by said heating means to said space between said radiant plate and said concrete manufacture for covering said surface layer impregnated with said monomer.