Answering the question: "Which is better - fibreglass or metal rebar?", we will focus on the characteristics of composite production. In comparisons, it will become clear that non-metal rebar ETIZ Composite wins with several criteria at once.
Fibreglass or composite rebar is 4 times lighter than metal products of the same diameter. This reduces the logistics costs when delivering rebar to a construction site, and also enables the customer to save on loading and unloading charges.
High tensile strength - 1200-1300 MPa - is typical of ETIZ Composite rebar. This attribute is 3-4 times higher than the strength of metal rebar, therefore, a smaller area requires reinforcement. As a consequence, a smaller diameter rebar is used.
Composite Rebar straightens out after the coils are unrolled. Production with a diameter of 6-10 mm is packed in coils of 50 r. m. which reduces rebar over-expenditure when working with concrete products of 6m length or more. Fibreglass rebar is the optimal reinforcing material for asphalt pavement, as rutting decreases during operation.
The use of composite rebar is recommended when constructing foundations, bridges, embankments and reinforced concrete structures. ETIZ Composite production retains its properties when interacting with water, therefore, buildings can be located close to groundwater surfaces.
Use of non-metallic rebar in concrete structures with large bending moments and increased requirements for crack opening implies an increase in reinforcement area. When designing, it is necessary to increase the diameter of composite products or use a narrower rebar spacing.
Unlike metal rebar, fibreglass products provide additional protection against cold temperatures. Due to low heat conductivity, composite material is used for production of flexible bonds in large buildings and other types of construction.
Fibreglass rebar can be cut right on the construction site with the help of locally available tools: from a hacksaw to an angle grinder with a disc for metal or ceramics.
Due to the absolute radio transparency and absence of electrical conductivity, this material is suitable for use in construction of both residential projects and concrete structures for special purposes such as medical centres, defence industry buildings and thermal power plants.
Please read the data from the relative table for a clear understanding of the difference between steel and fibreglass composite rebar:
|Characteristics||ETIZ Composite rebar||Class A-III steel rebar (А400С) GOST 5781-82|
|Material||16-24 microns glass fibres connected with a polymer||Steel 25G2S, 35GS, etc.|
|Temporary tensile strength, MPa||not less than 1300||390|
|Modulus of elasticity, MPa||not less than 55 000||200 000|
|Ultimate tensile strain, %||2,5||0,18|
|Stress behaviour||Curve with a yield line||Straight line with a linear elastic dependence up to failure|
|Linear expansion coefficient αх*10-6 /°C||6-10 longitudinal
|Corrosion resistance to aggressive media||Corrosion resistance to aggressive media||Rust formation|
|Thermal conductivity||Does not conduct heat||Conducts heat|
|Electrical Conductivity||Dielectric||Conductive material|
|Ecological compatibility||Does not emit harmful and toxic substances during storage and use||Environmentally friendly|
|Durability||not less than 80 years||Terms are prescribed in special building codes|
|Corrosion resistance to aggressive media||Corrosion resistance to aggressive media||Corrodes with rust formation|