Hemyan Steel Net Manufacturing

Unique Concrewall Green Build

With our unique Green Building technology our customers will benefit a total Green Solution from us. We provide our customers with everything from Green Project Management to Green Building construction.

The System:

The system is composed of a factory produced panel of undulated (wave shaped) polystyrene covered both sides by an electro welded zinc coated square mesh, which in turn connected by 40 connectors per m2 realizing a 3 dimensional hyper static reinforcement steel.

Salient features:

Light Material; Easy to Install-Fast construction; Fire resistant; Energy efficient; Earth Quake resistant; Versatile - flexible design; Storm resistant; Superior strength, etc.

Concrewall Panels

CONCREWALL, is an industrial system for the construction of structural walls of reinforced concrete for buildings in single panel up to four stories, G+3, and theoretically unlimited stories in double panel -eventual limitation derived solely after verification in accordance with the Building Codes. The system is composed of a factory produced panel of undulated (wave shape) polystyrene covered both sides by a electro welded zinc coated square mesh, which in turn are connected by 40 connectors per m2 realizing a 3 dimensional hyper static reinforcement steel.

The panels are assembled on site and in situ poured concrete (double panel, floors, stairs) and shot created concrete (single panel) to realize the different elements of the system:

Vertical structural walls;
Vertical structural walls;
Horizontal structural elements;
Cladding element;
Internal wall.

Single Panel

Double Panel

Floor Panel

Used as:

• Bearing structure for buildings up to 3 store, on site finishing with structural shot crate plastering in both sides;

• Partitions;

• Floors with short span sheet.

Two Single Panels with internal and external mesh, assembled through connectors, the concrete is poured “in situ”.

The thickness of the concrete will be defined on the basis of the structural requirements.

The outside panel is finished using standard plaster or ready mix material.

Used for floor slabs and roofs with variable thickness according to the span.

The reinforcing steel is placed the beams and poured with concrete on site.

Raw Material Characteristic Polystyrene (EPS)
	Unit of measurement	Types			Test Method
	Unit of measurement	I	II	III	IV A
Volume mass - tolerance per single sheet (±)	Kg/m³ %	15 6	20 6	25 6	30 6	UNI 6349
Compression resistance of 10% of min. deform.	KPa	60	100	140	180	UNI 6350
Min. tension strength	KPa	130	170	220	320	UNI 8071
Thermal conductivity - a 10° C - a 23° C	W/mK	0,037 0,040	0,035 0,037	0,034 0,036	0,034 0,036	UNI 7891 UNI 7891
Coefficient of linear expansion	K^-1	50x10^-6	50x10^-6	50x10^-6	50x10^-6
Fire reaction	Class	1	1	1	1	UNI 8457
Dimensional stability - at 10° C - at 70° C	%	0,2 0,5	0,2 0,5	0,2 0,5	0,2 0,5	UNI 8069 UNI 8069
Gas diffusion resistance	Adimens.	20-40	30-50	40-70	50-100	UNI 8054
Water absorption by immersion	% Vol	4	3	2	2	ISO 2896

Raw Material Characteristic Steel

A wire with high limit of breakage, FTK> 600 MPa, with an adequate ductility is employed for the production of the panels. The hot-dip galvanized steel is therefore protected towards corrosive processes.

The steel used for the wire of both meshes and connectors has the following reference standards:

1. Mechanical Characteristics

Tensile strength (N/mm²) ø3 ÷ 700 (min.)

Yield strength (N/mm²) ø3 ÷ 600 (min.)

Elongation ø3 > 8

2. Chemical Characteristics

% C < 0,24 % P < 0,055 % S < 0,55 % CEq < 0,52

3. Zinc covering

The zinc covering is variable with the diameter of the wire mesh. Standard mesh wire is using minimum 60 grams/sqm zinc covering with a tolerance of + / - 5 grams.

Structural Plaster

The Concrewall Single Panel used as bearing element is finished on site thought structural plaster application on each side. The standard final thickness of about 3 cm. The panel will form a plate of reinforced concrete with expanded polystyrene core. The structural plaster will have mixed choosing sand with granulometry from 0 to 5mm and final resistance of at least 200 ÷ 250 daN/cm2, variable according to the structural panels and geometry building conditions. The plaster should have a plastic consistency S2 (measured settlement with Abrams cone less than 5cm).

For standard dosage in one cubic meter of mass, the indicative quantity of each material should be:

Concrete - 350 kg
Sand with mixed granulometry - 1600 kg
Water - 160 Kg (Liters)

The quantity of water may be different according to the natural sand humidity.

The following parameter that should be constant:

A/C ~ 0,52

I/C ~ 4,5

The sand quality should be without clay or any organic substances and totally washed.

Any problems of workability must be solved without adding water, and using fluidifying additives dosed according to the manufacturer's specifications.

The retraction cracks formation can be avoided by adding polypropylene fibers into the mix (one kg per m3).

Easy to Install - Fast Construction

Residential Building 100m2 Built Surface: