WO2013016740A1

WO2013016740A1 - Synthetic mineral polymer bricks

Info

Publication number: WO2013016740A1
Application number: PCT/VN2012/000004
Authority: WO
Inventors: Trung Nghia Tran
Original assignee: Trung Hau Machinery Manufacturing And New Materials Production Joint Stock Company
Priority date: 2011-07-26
Filing date: 2012-07-25
Publication date: 2013-01-31

Abstract

A synthetic mineral polymer bricks are provided comprising the following components: sand, cement and polymer additives which are metered in a form of a batch and are formed by molding method, the metered batch is compactly pressed whereby to provide the bricks in uniform sizes, weights and strengths, wherein the batch components (% by weight) of the brick comprising: sand: 77% - 64,75%; cement: 20% - 35%; and polymer additives: 0,25% - 3%.

Description

SYNTHETIC MINERAL POLYMER BRICKS

Field of the invention

The present invention relates to a material for erecting industrial and civil buildings, in particular to synthetic mineral polymer bricks which are a kind of enviroment friendly building materials for replacement of traditional baked clays.

Background of the invention

Now, in order to erect the buildings, construction works, the construction materials are used with a various of different building products and manufactured in the different material elements and principles. It is possible to find that, the hollow gauged bricks are commomly used as they have the appropriate shapes, properties and costs. However, the hollow gauged bricks have encountered several following problems: They consume a great amount of baking fuels, the use of the tranditional coal for baking bricks will cause the environmental pollutions (as dust and fume are generated during the bake of bricks) and the greenhouse effects (as exhaust of carbondioxide C0₂ in baking process, and furthermore, the use of soil (clay) as main material for manufacturing the bricks will exhaust the earth resources, cause the soil corrosion and occupy the earth areas for the agricultural production.

The types of cob bricks, lightweight bricks v.v...are known in the market. However, these bricks are generally provided with a low level of production, relatively high costs and thus are not competitive with the traditional bricks.

Therefore, a need for a type of a perforated brick made of synthetic mineral polymer material which can substantially overcome the above problems is necessary. Brief summary of the invention

A basis object of the present invention is to provide a type of brick which has a good quality, a competitive cost, enviroment-friendly for replacement of the known traditional baked clays.

In order to achieve the above object, the present invention provides a synthetic mineral polymer brick comprising the following components: silic mineral (sand, quarry fines, fine-crushed waste of building, cinder, fly-ash ....), cement and polymer additives, which are metered in a form of a batch and are formed by molding method, the metered batch is compactly pressed whereby to provide the bricks in an uniform sizes, weights and strengths, wherein the batch components of the brick are in the following proportion (% by weight): silic mineral: 87% - 65%; cement: 10% - 35%; and polymer additives: 0% - 3%.

In a preferred embodiment of the present invention, polymer additives are selected from at least one of HPMC (HydroxyPropylMethylCellulose), PVA (Polyvinyl Alcohol), and CMC (Carboxyl methyl cellulose).

Advantageously, to the bricks can be also added at least one of the mineral components such as clay, kaolin, or fly-ash.

Brief description of the drawings

Next, an exemplary synthetic mineral polymer brick according to a preferred embodiment of the invention will be described with reference to the following drawings, wherein: Fig.l is a perspective view of a brick of the present invention.

Detailed description of the invention

A synthetic mineral polymer brick of the present invention has the following components (% by weight):

Sand: 87% - 65%;

Cement: 10% - 35%; Polymer additives: 0% - 3%.

These components are metered and prepared as the batch.

The polymer additives used for the synthetic mineral polymer bricks are the types of the binding organic polymers which are introduced into the batch formula so as to provide an innitial strength of the compressed brick for removing it from the dies without damaging. The polymer additives do not act on the block binding process to obtain the final strength of the brick.

Types of the polymer additives can be used in the batch formula such as follows: HPMC (HydroxyPropylMethylCellulose), PVA (Polyvinyl Alcohol), and CMC (Carboxyl methyl cellulose).

HPMC: functions as a surface active, a coating, a water-retaining and a binding agent that assists the brick in obtaining the high strength once pressed out, while in avoiding the water evaporation in the brick to secure a sufficient water amount for setting the cement. HPMC is in a form of the fine powder which is easily blended in the batch formula.

PVA: is used as the binding agent that binds the batch components so that the brick is compact in forming. PVA is in a form of the powder that must be predissolved in the water when it is introduced in the batch.

CMC are used as the binding and water-retaining agent in forming of the brick. The form of the powder of CMC must be predissolved in the water when it is introduced in the batch formula.

In an embodiment of the present invention, the batch mixture, after is metered, will be premixed in a dry state to uniform, to which then water is added to obtain the humidity ranging between 4% to 10%.

The batch mixture after uniformly mixed will be formed by compactly compressing the mixture in a recess of the metallic mold by means of a great pressing force. The surface profile of the recess is identical to the surface profile forming the brick of the present invention. Example of the present invention

Example: A brick with sizes of a = b = 80mm; c = 180mm, four perforated holes with diameter of d = 25mm, weight of 1,5 kg (Fig.l) of the present invention has the components:

Sand: 1038,5g

Cement: 347g

Polymer additives HPMC : 2,5g

Pure water: 112g

Time period for dry mixing: at least 2 minutes

Time period for wet mixing: at least 1 minutes

The brick is formed by using the pressure for compactly compressing the batch mixture in the recess of the metallic mold, the product is removed out. The water is then sprayed onto the product to maintain the humidity in atmosphere in the time period between 4 to 7 days, then it can be used as final product.

Achievable benefits

Quality of the brick is good, its costs are competitive, and it can replace for the traditional baked clays.

An investment cost of the brick is low, its manufacturing process is simple.

The brick is manufactured from the material resources which are plentyfull, available, cheap (because the majority of the material resources is industrial waste)

The features of the bricks are enviroment-friend, fuel and electric saving (as do not bake it during the manufacturing).

Claims

1. A synthetic mineral polymer brick comprising the following components: a silic mineral (sand, quarry fines, fine-crushed waste of building, cinder, fly-ash ....), a cement and a polymer additives which are metered in a form of a batch and are formed by molding method, the metered batch is compactly pressed whereby to provide the bricks in uniform sizes, weights and strengths, wherein the batch components of the brick are in the following proportion (% by weight):

sand: 87% - 65% ;

cement : 10% - 35%; and

polymer additives : 0% - 3%.

2. A synthetic mineral polymer brick according to claim 1, wherein the polymer additives are selected from at least one of HPMC (HydroxyPropylMethylCellulose), PVA (Polyvinyl Alcohol), and CMC (Carboxyl methyl cellulose).

3. A synthetic mineral polymer brick according to claim 1, wherein to said brick can be added at least one of the mineral components such as clay, kaolin, or fly-ash.