Comparative characteristics of fiberglass rebar with steel fittings
Fiberglass rebar for construction works.
A new reinforced element for construction works is high-strength non-metallic rebar made of composite materials.
Nonmetallic rebar is produced in the form of a rod with spiral relief of any building length from glass fibers impregnated with a chemically resistant polymer.
According to the research results of durability of building structures using the rebar is at least 80 years.
This durability is due to the high chemical resistance of the rebar to all known aggressive medium - gas medium of high concentrations, chloride salts, deicing reagents, sea water, etc.
Comparative characteristics of fiberglass rebar with steel rebar.
| Сharacteristics | Metal rebar of class A-III (A500C) | Fiberglass rebar |
| 1. Material | steel | glass roving bonded by the polymer based on epoxy resin |
| 2. The limit of the tensile strength, MPa | 390 | 1100 |
| 3. Elongation, % | 14 | 2.2 |
| 4. Density, t / m3 | 7 | 1.9 |
| 5. Corrosion resistance | corrodes | stainless material |
| 6. Thermal conductivity | thermal conductive | not thermal conductive |
| 7. Conductivity | conductive | dielectric |
| 8. Produced profiles, dia. mm | 6-80 | 4-32 |
| 9. Length, m | 6-12 | upon customer’s request |
|
10. Ecological compatibility |
eco-friendly | non-toxic, according to the degree of impact on the human body and the environment belongs to the 4th class of danger (low-risk) |
| 11. Durability | in accordance with building regulations | projected at least 50 years |
| 12. Rebar replacement for physical and mechanical properties, dia. mm |
6 |
4 |
| 13. Parameters of the equally-efficient rebar cage with a load of 25 t/ m3 | When using rebar Ø8 A-III cell size 14х14 cm weight 5.5 kg/m3 | When using rebar Ø8mm cell size 23х23см weight 0.61 kg/m3. 9 times reduced weight |
| Сharacteristics | Metal rebar of class A-III (A500C) | Fiberglass rebar |
| Ultimate strength at MPa break (usb) |
usb = 390; |
FRP: usb= 1 000; брасч= 900 |
| FRP: бв = 1 200; брасч = 1 100 | ||
| Modulus of elasticity, MPa | Ер= 200 000 | FRP: Ер = 41 000 |
| FRP: Ер = 55 000 | ||
| Rebar habit under load (the dependence of "b and E») | Traction pad under load | Elastic-linear dependence to destruction |
| Elongation, E, % | 14 | 2,2 |
| Density, γ, g/cm3 | 7,8 | 1,9 |
| Corrosion resistance | Corrodes with release of the rust | Does not corrode |
| Thermal conductivity | Thermal conductive | Not thermal conductive |
| Conductivity | Conductive | Not conductive |
| Heat resistance |
Tested in hot asphalt concrete (~ 2000C) environment and in steaming concrete products (~1000C) No limpness revealed. |
|
| Frost resistance |
Tested in a climatic chamber in the freezing and thawing modes to a temperature-550C within 100 cycles. No limpness revealed. |
Replacement of steel rebar with fiberglass.
| Steel rebar A3 (A500C) | Fiberglass rebar |
| Ø 6 А3 FCS=28,3 mm2 TSFCTRr =10 200 h |
Ø 4 mm FCS= 10,2 mm2 TSFCTRr = 10 200h |
| Ø 8 А3 FCS =50,3 mm2 TSFCTRr= 18 100h |
Ø 6 мм FCS =18,2 mm2 TSFCTRr = 18 100h |
| Ø 10 А3 FCS= 78,5 mm2 TSFCTRr = 28 300 h |
Ø 7 мм FCS =28,3 mm2 TSFCTRr = 28 300h |
| Ø 12 А3 FCS = 113,1 mm2 TSFCTRr =40 720h |
Ø 8 мм FCS = 40,7 mm2 TSFCTRr = 40 720h |
| Ø 14 А3 FCS=154 mm2 TSFCTRr = 55 450h |
Ø 10 мм FCS=55,5 mm2 TSFCTRr=55 450h |
| Ø 16 А3 FCS= 201 mm2 TSFCTRr= 72 360h |
Ø 11 мм FCS=72,4 mm2 TSFCTRr = 72 360h |
| Ø 18 А3 FCS = 254 mm2 TSFCTRr = 91 450h |
Ø 12 мм FCS=91,5mm2 TSFCTRr =91 450h |
|
Ø 20 А3 |
Ø 13 мм FCS= 113 mm2 TSFCTRr = 113 040h |
| Ø 20 А3 FCS =314 mm2 TSFCTRr= 113 040h |
Ø 14 мм FCS = 137 mm2 TSFCTRr = 136 800h |
FCS - rebar cross-section, mm2
TSFCTRr - tensile strength of rebar at the calculated time resistance to rupture, H.
