GB2584390A

GB2584390A - Container

Info

Publication number: GB2584390A
Application number: GB1905855.1A
Authority: GB
Inventors: Mountain Andrew; Cookson Martin; Hazlewood Dave; Goodwin Simon
Original assignee: Goodwin PLC
Current assignee: Goodwin PLC
Priority date: 2019-04-26
Filing date: 2019-04-26
Publication date: 2020-12-09
Also published as: GB2583841B; GB2583841A; GB202006031D0; GB201905855D0

Abstract

A container for fine powder building material comprising an open weave bag woven from biodegradable natural material, an inner liner of non-woven cold water soluble fabric that prevents shedding of fine powder during filling or transport. The inner fabric liner may be made from polyvinyl alcohol that dissolves in water below 30 degrees when the container is soaked, the open weave bag may comprise hessian or jute. The container may hold a water settable material, such as concrete or cement, where the outside of the container may be soaked to dissolve the inner liner and set the building material.

Description

CONTAINER

Open weave sandbags containing dry concrete materials which set when wetted arc known for placement of concrete. Such bags can be placed in a dry location and then wetted to provide a set concrete structure. Preferably such open weave sandbags are made of a biodegradable material such as hessian. Hessian sandbags have an open weave which is too open for the containment of fine powdery material like cement, concretes and fine sand. Fine material can therefore be shed from hessian sandbags during filling, transportation and use.

GB2464669A discloses the use of a biodegradable or degradable film bag for the placement of concrete in and around watercourses formed from a biodegradable or degradable impermeable polymer film. The film may be water soluble. The film bag may he placed within a hessian, jute or similar natural fabric hag. As the bags are intended for placement in water the polymer film, although it may be water soluble, should be capable of remaining intact and impermeable for a sufficient period to enable placement in water.

According to the present invention there is provided a building material container comprising an open weave bag woven from a biodegradable natural product such as hessian or jute with an inner liner of a cold water soluble fabric wherein the lined bag can be filled with a building material such as concrete or sand which comprises fine powder, the inner liner preventing shedding of the fine powder during filling or transport. The filled container may be placed in a desired location and water applied to the container, for example from a hose, to dissolve the inner lining and allow wetting of the building material.

In a further aspect of the present invention there is provided a method of placing a water settable building material wherein said building material comprises fine particles comprising providing the building material in a container comprising an open weave hag woven from a biodegradable natural product such as hessian or jute with an inner liner of a cold water soluble fabric wherein the inner liner prevents shedding of the building material fine particles, soaking the container to dissolve the inner lining and allow wetting and setting of the building material. In a preferred embodiment the building material is a settable material such as concrete or cement and the wetting of the building material initiates the setting process.

The inner lining is a cold water soluble fabric. Such fabrics are known for use as water soluble embroidery hacking. They are water soluble at cold temperature, typically in the range of 10 to 30 degrees centigrade. The fabric is a non-woven fabric. Typically it is non-woven polyvinyl alcohol (PVOH) fabric.

The use of a water soluble fabric rather than a polymer film aids the take up and absorption of applied water (typically within a minute of it being applied) and therefore assists with more rapid dissolution of the water soluble fabric than can be achieved with a polymer film liner.

The container can be placed in a dry location and the cold water soluble fabric liner can be dissolved by applying water to the outside of the container. The water can soak through the open weave bag to dissolve the cold water soluble liner and the applied water can then soak into the building material. Water may easily he applied from a hose or from a bucket or other container. As the cold water soluble inner fabric will dissolve in cold water, typically in the range of 10 to 30 degrees centigrade, there will generally be no need to heat the water, but some heating may be provided to raise the water temperature to accelerate dissolution if this is required.

Example 1

A container in the form of a sack comprising a woven hessian bag lined with a non-woven polyvinyl alcohol fabric adapted to dissolve in cold water (Solufleece from Freudenberg Performance Materials Apparel SE & Co. KG) was filled with a dry concrete mix comprising fine cement particles. There was minimal shedding of the fine cement particles during filling. The filled container was sealed and subjected to handling such as might occur in transit or at a building site. There was minimal shedding of the fine cement particles. The filled and sealed container was placed at a dry location and water applied to the container from a hose at a temperature of 15 degrees centigrade until the liner dissolved and the contents were wetted. The wetted container, now with dissolved liner and containing wetted concrete mix, was left to dry. The concrete was later investigated and found to have set within the hessian bag.

Claims

CLAIMS1. A building material container for containing building material comprising fine powder said container comprising: an open weave bag woven from a biodegradable natural material; and an inner liner of a non-woven cold water soluble fabric wherein the inner liner prevents shedding of the fine powder during filling or transport of the filled container.
2. A container according to claim I wherein said inner fabric liner comprises polyvinyl alcohol.
3. A container according to claim 1 or claim 2 wherein said open weave bag comprises hessian or jute.
4. A container according to any preceding claim wherein said inner lining is dissolvable by application of water at less than 30 degrees centigrade from a hose directed at the outside of the container.
5. A container according to any preceding claim filled with a water settable building material.
6. A method of placing building material comprising: providing the building material in a container according to any preceding claim; placing the container in a desired location; soaking the container to dissolve the inner lining
7. A method according to claim 6 wherein said building material is a water settable material and the step of soaking the container allows wetting and setting of the watersettable material.
8. A method according to Claim 7 wherein said water settable building material comprises cement or dry concrete mix.
9. A method according to any one of claims 6 to 8 wherein the step of soaking the container comprises the step of applying water to the outside of the container from a hose.