Basalt Rebar

Description and basalt rebar range. Price upon request

Basalt rebar is a composite material of the future, which has its supporters in many countries of the world and, according to forecasts, will soon occupy a permanent niche in the construction industry. And although the concept of “composite material” is not new for specialists, mankind has continued to use metal for a long time.

What is a composite rebar?

Composite rebar is a non-metallic rod made from glass, basalt, carbon (carbon) and aramid fibers with polymer compounds. At a time when glass rebar has been in the market for a long time, basalt rebar is a relatively new product that is actively gaining public confidence and is increasingly used in various projects every year.

Basalt rebar is manufactured using continuous basalt roving. Externally, it is a rod with continuous spiral ribbing formed by winding with a basalt braid moistened with a high-strength polymer compound.

Basalt rebar:
specifications

Ultimate tensile strength (determined according to GOST 12004) σ = 1100–1200 MPa

Elastic module (GOST 12004) E = 70–75 GPa (according to DSTU 43-45 GPA)

Poisson’s ratio μ = 0,22–0,25

Ultimate elongation at break ε₀ = 0,0133-0,0186 (1,33–1,86%)

Coefficient of linear thermal deformation (for concrete k = 0.7–1.0·10^-5): α = 0.5–0.9·10^-5

Thermal conductivity coefficient λ = 0,036 Вт/(м·К)

Operating temperature T = –70…+160°С

Density ρ = 1,9 гр/см³

Corrosion resistance: very high

Adhesion to concrete: excellent

Basalt rebar Technobasalt® has passed a number of tests in specialized state institutions and organizations.

Today in Ukraine, there is a number of regulations governing the use of basalt rebar:

• DSTU B.V.2.6-145: 2010 “Construction of buildings and structures. Protection of concrete and reinforced-concrete structures against corrosion. General technical requirements”.
• DSTU-N B V.2.6-185: 2012 “Instructions for design and production of concrete structures with non-metallic composite reinforcement based on basalt and glass roving”.
• DSTU-N B V.2.7.-312: 2016 “Nonmetallic composite basalt rebar of periodical profile”
• M 42.1-37641918-759: 2017 “Method of design of concrete bridge structures reinforced with basalt rebar for endurance”
• M 42.1-37641918-756: 2017 “Method of design of concrete bridge structures reinforced with basalt rebar against low-cycle loads”
• Р В.3.2-03450778-830: 2013 “Recommendations on the use of nonmetallic rebar for the reinforcement of structural span bridges structured constructions”
• Р В.2.3-03450778-846: 2014 “Recommendations on the design of basalt-concrete bridges and pipes structures “
• The use of basalt rebar in the world is regulated by the following documents: ACI 440R-07 CAN / CSA-S806-02, CAN / CSA-S6-06, CNR-DT 203/2006.

The state enterprise “State Research Institute of Building Structures” tested samples of basalt rebar produced by Technobasalt-Invest, LLC for tensile strength. As a result of rebar Ø10 mm testing, a tensile strength of 1405.3 MPA was obtained, which is 4 times higher than the tensile strength of steel reinforcement.

The results of studies of concrete grades  B25 and B30 and cement mortar M100 with the addition of Technobasalt TM basalt fiber showed that the tensile strength in bending increases up to 30% in the concrete grades B25 and B30 and by 48% in the M100 cement mortar. Compressive strength increases up to 14% in concrete grades B25 and B30 and by 58% in cement mortar M100.

We have made tests for the basalt rebar (ANPB) adhesion to concrete: the research results showed that the general form of the curves of the tangential stress-shear strain for ANPB corresponds to similar curves for steel reinforcement, and the obtained values ​​of shear stresses for 8 mm, 10 mm, 12 mm meet the requirements of EN 1992-1-1.

It was also proved that the parameters of ANPB adhesion to concrete  are close to the corresponding parameters of type A rebar, and it is possible to use the calculated dependencies for steel reinforcement of periodic profile for ANPB (B) anchoring calculating in concrete.

Today, the most popular areas for the use of basalt rebar are the road industry, civil and industrial construction, special structures that work in an aggressive environment, architectural cement concrete products. There are spheres where it is impossible to work without this innovative material, namely: the construction and repair of water treatment facilities, storage facilities, processing and disposal of household solid and liquid waste products of settlements, reinforcement of concrete structures operated in conditions of high voltage electromagnetic fields and potential differences (NMR tomography boxes, supporting structures of high-voltage lines and substations, etc.), construction of bridges, hydraulic structures, strengthening of coastlines, reconstruction of structures that are constantly exposed to water or other aggressive factors, etc.