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Basalt Fiber: Sea structures
Here is a presentation about this application:
Basalt fiber reinforced concrete
The use of corrosion resistant fiber reinforced polymer (FRP) reinforcement is beneficial in transportation structures particularly those exposed to deicing salts, and/or located in highly corrosive environment.
Glass, carbon and agamid fibers are commonly used in the manufacture of reinforcing bars for concrete applications. Recent developments in fiber production technology allow the making of rebars from basalt fiber which is made from basalt rock. Basalt fiber has good range of thermal performance, high tensile strength, resistance to acids, good electro-magnetic properties, inert nature, resistance to corrosion, radiation, vibration and impact loading. BFRP products are available in a variety of forms such as straight rods, loops, two-dimensional mesh, and spirals.
Fiber reinforced polymer (FRP) composite bars and fabric sheets are currently being used as internal or external reinforcement for concrete members in many structural systems. American Concrete Institute Committee published a revised state-of-the-art report (ACI 440R-07 1 ) and several other reports for the design and construction of structural concrete internally reinforced with FRP bars. These reports provide design guidelines and recommendations, and provide information on the use of common FRP materials such as, glass (GFRP), agamid (AFRP) and carbon (CFRP).
High strength, light weight, non-magnetic and non-corrosive properties, and good fatigue endurance are among some of the favorable properties that would favor the use of FRP bars. High initial cost, low modulus, linear stress/strain behavior until failure, and durability issues are some obstacles to the adoption of FRP materials in transportation infrastructure.
However, there remain questions regarding the performance of GFRP and AFRP in highly alkaline environment within concrete. CFRP bars are too expensive to be implemented in normal cost sensitive civil engineering structures. Furthermore, cost of production of FRP bars is high because FRP bars that are currently available in the market are manufactured by pultrusion method.
A new type of reinforcing bars made from basalt fiber (BFRP) has good potential to provide benefits that are comparable or superior to GFRP, and significantly cost effective compared to CFRP. A new wet layup process was recently developed and patented by a Norwegian company Reforcetech.
http://onlinepubs.trb.org/onlinepubs/conferences/2009/Infrastructure/Patnaik.pdf
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