A PROCESS FOR THE PREPARATION OF A PUMPABIE AND SPRAYABLE CONCRETE MIX AND AN AIRPIACING UNIT FOR PREPARING THE SAID CONCRETE MIX
To apply a layer of spray concrete to a surface, a pumpable and sprayable spray concrete mix is made up from cement, aggregates, if appropriate additives, and water. A preset mass flow of the spray concrete mix is sprayed by means of a concrete delivery pump through a concrete transfer line to a spr...
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Main Authors | , |
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Format | Patent |
Language | English |
Published |
26.10.1991
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Edition | 5 |
Subjects | |
Online Access | Get full text |
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Abstract | To apply a layer of spray concrete to a surface, a pumpable and sprayable spray concrete mix is made up from cement, aggregates, if appropriate additives, and water. A preset mass flow of the spray concrete mix is sprayed by means of a concrete delivery pump through a concrete transfer line to a spray gun with a device for introducing propellant air under a delivery pressure of several bar. The propellant air is laden with synthetic silica having a BET surface area of at least 25 m /g. With the propellant air, the synthetic silica is introduced into the mass flow of the spray concrete mix in such a quantity that the applied spray concrete undergoes a spontaneous temperature increase by a few degrees Kelvin immediately after the application. A spray gun for the process is also described. |
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AbstractList | To apply a layer of spray concrete to a surface, a pumpable and sprayable spray concrete mix is made up from cement, aggregates, if appropriate additives, and water. A preset mass flow of the spray concrete mix is sprayed by means of a concrete delivery pump through a concrete transfer line to a spray gun with a device for introducing propellant air under a delivery pressure of several bar. The propellant air is laden with synthetic silica having a BET surface area of at least 25 m /g. With the propellant air, the synthetic silica is introduced into the mass flow of the spray concrete mix in such a quantity that the applied spray concrete undergoes a spontaneous temperature increase by a few degrees Kelvin immediately after the application. A spray gun for the process is also described. |
Author | MULLER KARL-HANS BARTHEL WALTER |
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Notes | Application Number: IN217CA1988 |
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Snippet | To apply a layer of spray concrete to a surface, a pumpable and sprayable spray concrete mix is made up from cement, aggregates, if appropriate additives, and... |
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SubjectTerms | APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL ARTIFICIAL STONE ATOMISING APPARATUS BUILDING BUILDING IMPLEMENTS OR OTHER BUILDING AIDS, OR THEIRUSE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE CONVEYING FIXED CONSTRUCTIONS FORMS HANDLING BUILDING MATERIALS ON THE SITE HANDLING THIN OR FILAMENTARY MATERIAL LIME, MAGNESIA METALLURGY NOZZLES PACKING PERFORMING OPERATIONS PNEUMATIC TUBE CONVEYORS PREPARING CLAY PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL,e.g. PLASTER REFRACTORIES REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTINGBUILDINGS SCAFFOLDING SHOP CONVEYOR SYSTEMS SHUTTERING SLAG SPRAYING APPARATUS SPRAYING OR ATOMISING IN GENERAL STORING TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING ORTIPPING TRANSPORTING TREATMENT OF NATURAL STONE WORKING CEMENT, CLAY, OR STONE |
Title | A PROCESS FOR THE PREPARATION OF A PUMPABIE AND SPRAYABLE CONCRETE MIX AND AN AIRPIACING UNIT FOR PREPARING THE SAID CONCRETE MIX |
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