GMT formwork

1.light weight, 100% recycle 2.impact & corrosion resistance 3.thickness:10mm,12mm,15mm 4.can be repeatly reused for 50 times

GMT Formwork---Green Construction Material in 21st Century

GMT (Glass Mat reinforced Thermoplastics) material is a new kind of environmental friendly engineering plastics. In 2000, the GMT Formwork has been successfully developed and put into use in the country of America, South Korea, Japan, and many European countries. It is the best substitute of plywood formwork, steel formwork, and can be repeated using for 50 times and is available for recycling. Moreover, this project has been brought into our national “863 program” in 2007. Basing on this program, Xinjie Group invested 100 million Yuan brought into the most advanced automatic production equipment under the cooperation of Ningbo Institute of Materials Technology and Engineering, aiming to make the GMT material product into the application of construction industry. After many years research, we have owned the proprietary intellectual property rights and built into the GMT producing systems, and it is also awarded the green project by the national construction department.

Advantages of GMT Formwork

1, Environmental friendly—100% recyclable

GMT material product caters to the global environmental strategy of “wood to plastic, steel to plastic” and is 100% recyclable, so it is named of “A New Type of Green Material in 21st Century”. If using GMT formwork to substitute plywood formwork, you can save a big tree of 20cm in diameter for every 8 square meters of construction areas.

Comparisons between GMT Formwork and Plywood Formwork

2, Scientific Design---repeated using reaches more than 50 times

GMT formwork is waterproof, corrosion resistance and impact resistance, so it is extremely hard to get broken during operation times, and thus increase its repeated using times. If without sawing, GMT Formwork can be repeated using for more than 50 times in concrete pouring of ceiling and shear walls. But if plywood formwork, the repeated using times only reaches 5-6 times.

GMT Formwork can keep solid and clean after many times using, but not for plywood

GMT Formwork with reinforced rib will remain strong after 50 times using

3, Weather Resistance Design—No deformation, and no expansion with heat and no contraction with cold

Compared with the formwork of PP, PVC, WPC (wood and plastic), the GMT formwork has an outstanding advantage, such as not easy to deform, and no expansion with heat and no contraction with cold. Furthermore, our GMT Formwork can operate under the temperature of minus 20°C and 60°C, and can have a tight joint of each two pieces of formwork and stop cement leaking.

Test about Changes after Heating
Test Items	Reference Standard	Test Result
Change Rate of length	Among ±0.2%	0.06
Thermal Stress	Above 0.6	1.7
Impact Resistance	No cracking	No cracking
Bending Changes	Within 30mm	16.5

Environmental Test

                

        Keeping Stable on temperature of 80°C                                    Keeping Stable on temperature of -40°C

4, Unique Surface Design---Good Molding Performance

The GMT formwork has been done special treatment on its rough surface, so it is abrasion resistance, attaching well with concrete, and no need releasing agent. The concrete surface after removal of formwork is smooth and flat, and beautiful to see. The removed formwork has no concrete stuck, and is easy to be reused.

Comparison between Surfaces of removed GMT formwork and plywood,                                                    No releasing agent needed

5, Labor saving design-----easy to operate, and low cost

GMT Formwork with reinforced rib has nail holes, nail groove, and formwork removal hooks. So it is easy to nail and get formwork removed. Our GMT formwork can operate with the cooperation of plywood formwork, which makes the construction easier and human cherishing.

    

                    Nail Holes on front side                                        Nail Holes on back side                   Remain high strength with full nails

                            Formwork Removal Hook(spare parts)                       Nail Groove on back side

Mechanical Strength of GMT Formwork with Reinforced Rib

  

Items	Standard	Test Results
Density (g/cm3)	ASTM D792	1.18
Tensile Strength (Kgf/cm3)	ASTM D638	1300
Bending Strength (Kgf/cm2)	ASTM D790	1800
Bending Modules (Kgf/cm2)	ASTM D792	74000
IZOD Impact Intensity (kgf.cm/cm)	ASTM D256	70
Contraction Rate (%)		0.1-0.2
Water Soaking Rate (%)		Below 0.05
Heat Deformation Temperature (°C)	ASTM D648	145
Glass Fiber Content (%)		35
Repeated Using Times (times)		45

Mechanical Strength of GMT Flat Formwork

Thickness(mm)	Application Areas	Density (g/cm³)	Bending Strength (Mpa)	Bending Modules (Mpa)
10	Ceiling	0.68	40	1400-1700
12	Ceiling	0.82	40	1400-1700
15	Pillar/Wall	0.98	43	1400-1700

Specifications of GMT Formwork

Specifications (mm)	Models	Volume Density (g/Cm3)	Weight (kg)	Working Performance	Remarks
610*1830*15	Ribs	About 0.47	About 8.0	Available to be sawed, but not suggested	Fixed Density
915*1830*15	Ribs	About 0.47	About 11.5
915*1830*12	Flat	About 0.70	About 14.0	Available to be nailed and sawed, but causing wastage	Density Adjusted
915*1830*15	Flat	About 0.65	About 16.3
1220*2440*12	Flat	About 0.75	About 26.8
1220*2440*15	Flat	About 0.80	About 35.8

GMT formwork