Comparison of metal and composite rebars
|
Characteristics |
Reinforcement |
|
|---|---|---|
|
Metal reinforcement class A-III (A400C) GOST 5781-82 |
Non-metal composite reinforcement (ASP-fiberglass) |
|
|
Material |
Steel 35GS, 25G2S |
ASP – polymer-bound glass fiber 13-16 micron in diameter |
|
Tensile strength, MPa |
360 |
1 200 |
|
Modulus of elasticity, MPa |
200 000 |
55 000 |
|
Elongation, % |
25 |
2,2 |
|
(Stress-strain relationship) |
A curve with a yield point under stress |
A straight line with linearly-elastic relationship under stress up to destruction |
|
Density , t/m3 |
7,8 |
1,9 |
|
Corrosion resistance to aggressive media |
Subject to corrosion, rust appears |
Non-corrosive material, class I(chemical resistance to alkaline environment of the concrete) |
|
Heat conduction |
A heat-conductor |
Not a heat-conductor |
|
Electroconductivity |
Conducts electricity |
Non-conducting material, a dielectric |
|
Produced profiles |
6 - 80 |
3.5-12, up to 20 in the future |
|
Length |
The rods of length 6-12 m |
Any length on customer’s request |
|
Ecological compatibility |
Environmentally friendly |
There is a Sanitary-Epidemiological Conclusion Certificate, does not evolve hazardous and toxic gases |
|
Operating life |
In accordance with building standards |
Not less than 80 years |
|
FRP equivalents for replacing steel rebar |
6 АIII |
4 АКС |
|
Parameters of full-strength reinforcement cage under stress 25t/m2 |
Using reinforcement 8AIII, cell size 14*14cm. Weight 5.5kg/m2 |
Using reinforcement 8 AKC, cell size 23*23 cm. weight 0.61 kg/m2. Weight is 9 times less |
|
Economics |
For 6 months the cost of metal has been increased by 67% |
Replacing metal reinforcement by full-strength composite one saves 10-30%. Price growth dynamics is 2-4% per year. |
|
Application |
In accordance with building standards |
In accordance with recommendations |
|
Characteristics |
Metal reinforcement, class III (A400C) GOST 5781-82 |
Nonmetal composite reinforcement (AKC – fiberglass) |
Full-strength replacement of steel rebar by composite reinforcement.
|
Steel rebar |
Composite reinforcement |
||
|---|---|---|---|
|
Diameter, mm |
Meters in 1 t. |
Diameter, mm |
Meters in 1 t. |
|
6 |
4504 |
4 |
48780 |
|
8 |
2531 |
6 |
20618 |
|
12 |
1126 |
8 |
11299 |
|
14 |
826 |
10 |
7092 |
|
16 |
632 |
12 |
4897 |