Characteristics of armature

Fiberglass and steel rebar features: comparison

	Ø 8 mm 0.315 in			Ø 10 mm 0.393 in			Ø 13 mm 0.511 in
Test Parameter	Composite rebar	Steel rebar A240	Steel rebar A400	Composite rebar	Steel rebar A240	Steel rebar A400	Composite rebar	Steel rebar A240	Steel rebar A400
Ultimate Tensile Strength	1130 MPa 164 ksi 115.2 kgf/mm²	373 MPa 54.1 ksi 38 kgf/mm2	590 MPa 85.6 ksi 60 kgf/mm2	1294 MPa 187.7 ksi 132.0 kgf/mm²	373 MPa 54.1 ksi 38 kgf/mm2	590 MPa 85.6 ksi 60 kgf/mm2	1200.6 MPa 174.1 ksi 122.5 kgf/mm²	373 MPa 54.1 ksi 38 kgf/mm2	590 MPa 85.6 ksi 60 kgf/mm2
Average tensile strength	56.89 kN 12.8 klbf 5805 kgf	18.62 kN 4.2 klbf 1900 kgf	29.4 kN 6.6 klbf 3000 kgf	91.83 kN 20.6 klbf 9370 kgf	37.2 kN 8.4 klbf 3800 kgf	58.8 kN 13.2 klbf 6000 kgf	154.91 kN 34.8 klbf 15816 kgf	71.3 kN 16 klbf 7277 kgf	112.6 kN 25.3 klbf 11490 kgf
Strain	2.1 %	25% Including plastic deformations	14% Including plastic deformations	2.05 %	25% Including plastic deformations	14% Including plastic deformations	1.92 %	25% Including plastic deformations	14% Including plastic deformations
Guaranteed bond strength	10.57 MPa 1.53 ksi 1.08 kgf/mm²	4.05 MPa 0.59 ksi 0.413 kgf/mm²	8.12 MPa 1.18 ksi 0.83 kgf/mm²	10.79 MPa 1.56 ksi 1.10 kgf/mm²	-	-	11.12 MPa 1.61 ksi 1.13 kgf/mm²	-	-

Comparirison of fiberglass and metal rebar

Diameter, mm	Weight per one meter, kg		Ultimate Strenght, kN			Ultimate Strenght, kgf
Diameter, mm	Fiberglass rebar	Metal rebar А300 and А500	Fiberglass rebar	Metal rebar А300	Metal rebar A500	Fiberglass rebar	Metal rebar А300	Metal rebar A500
6	0,058	0,222	38,6	8,5	14,1	3 942	865	1442
6,5	0,068	0,261	45,3	9,9	16,6	4 626	1015	1692
7	0,079	0,302	52,6	11,5	19,2	5 365	1178	1963
7,5	0,091	0,347	60,4	13,2	22,1	6 159	1352	2 253
8	0,103	0,395	68,7	15,1	25,1	7008	1538	2563
8,5	0,116	0,446	77,5	17,0	28,4	7911	1736	2 894
9	0,130	0,500	86,9	19,1	31,8	8869	1946	3 244
9,5	0,145	0,557	96,8	21,3	35,4	9 882	2 169	3 615
10	0,161	0,617	107,3	23,6	39,3	10 950	2 403	4.005
11	0,195	0,747	129,8	28,5	47,5	13249	2908	4846
12	0,232	0,889	154,5	33,9	56,5	15768	3460	5767
13	0,272	1,043	181,4	39,8	66,3	18505	4061	6769
14	0,315	1,210	210,3	46,2	76,9	21462	4710	7850
15	0,362	1,389	241,4	53,0	88,3	24637	5407	9011
16	0,412	1,580	274,7	60,3	100,5	28032	6152	10253
17	0,465	1,784	310,1	68,1	113,4	31645	6945	11575
18	0,521	2,000	347,7	76,3	127,2	35478	7786	12977
20	0,644	2,469	429,2	94,2	157,0	43 800	9 612	16 020
22	0,779	2,987	519,4	114,0	190,0	52 998	11 631	19 385

Possible replacement of steel rebar by FRP rebar according to standard tensile strength

Parameter	Steel rebar						Fiberglass rebar
Type of rebar	А240	А300	А400	А500	А600	А800	Templet
Tensile strength, MPa	240	300	400	500	600	800	1367
Nominal diameter, mm	14	12	11	9	9	7	6
	16	14	12	11	10	9	7
	19	17	14	13	12	10	8
	21	19	16	14	13	11	9
	23	21	18	16	15	13	10
	26	23	20	18	16	14	11
	28	25	22	19	18	15	12
	31	27	24	21	19	16	13
	33	29	25	23	21	18	14
	38	34	29	26	24	20	16

How to use this table: For example - The customer uses A500 brand reinforcement with a diameter of 16mm. To select the interchangeable FRP rebar, you need to find your brand in the “Type of rebar” line, in our example it is A500. Next, in the column below we look for our diameter - 16. Then in the line on the right we find the diameter of the interchangeable composite reinforcement - 10.

The proposed replacement of steel rebar with FRP rebar is advisory in nature. For structural construction, it is recommended to confirm the replacement with engineering calculations that take into account the nature of the structure loading . This is not a public offer.

Relationship between stress and strain

Force versus displacement for ø10mm rebar

Other features of composite (FRP) rebars

Density.

2140 kg/m3.

Coefficient of thermal linear expansion.

steel rebar 13-15 x10-6/°С
fiberglass rebar 9-12 x10-6/°С
concrete 7.4-10 x10-6/°C (depending on the concrete composition and properties of the constituent materials).

In other words, the composite rebar has a coefficient of thermal linear expansion that is almost similar to the coefficient of thermal linear expansion of concrete. This increases the service life of buildings.

Coefficient of thermal conductivity.

0.48 Вт/(м °С)

Heat resistance .

The rebar is hidden inside the concrete and has good heat resistance . While in concrete, FRP rebar maintains a load-bearing capacity of up to 300 ° C.

Durability.

Express tests show that the durability of such material is a hundred years or more. If necessary, we will be able to provide the results of such tests for such products.

Corrosion and physical properties.

Excellent corrosion resistance. Electromagnetic neutrality. Dielectric.

Chemical Resistance.

Acid resistance is excellent and there is no chemical reaction with acids. The alkali resistance test for composite rebar shows that the absence of solvents and other volatile components in the epoxy resin guarantees its excellent chemical resistance. Our rebars do not use any solvents or volatile components.

Chemical & Material Composition

The binder is based on high-quality epoxy resin, glass roving from world leading manufacturers in the industry. The size is optimally selected for ideal adhesion of fibers and binder.

Ultra violet resistance.

The special pigment in our rebar compositions evolves high resistance to ultraviolet radiation.

Frequently Asked Questions

The maximum number of floors in buildings using composite rebars is determined by the rules, standards and laws of the country where such a structure is being built, as well as relevant engineering calculations. The practice of using composite rebars, for example in the USA, extends to low-rise private buildings and, as a rule, these are buildings with a height of one or two floors.

Composite and steel reinforcement are similar in cost with the same diameter. But it should be taken into account that composite rebar is 2-4 times stronger than steel rebar, and four times lighter than it. Guided by the table for equal-strength replacement of FRP and steel rebars and engineering calculations, you can use FRP rebar of a smaller diameter. In this case, and also taking into account the reduction in transportation costs, it is possible to obtain a price gain of up to 30%.