Performance

Q: How does MST-BAR® strength compare to steel?

A:  MST-BAR® has a tensile strength of greater than 1000 MPa (145 ksi), in comparison to steel, MST-BAR® can take over 3x the tensile load of steel before failure. 

 

Q: How does MST-BAR® modulus of elasticity compare to steel?

A:  MST-BAR® has a tensile modulus of greater than 65 GPa (9427 ksi), in comparison to steel, GFRP rebar is more flexible. 

 

Q: How does MST-BAR® strain compare to steel?

A:  MST-BAR® has a tensile strain between 1.5% to 2.5%.

 

Q: What is the resistance of MST-BAR® to the Alkali Environment?

A:  MST-BAR® has tested according to CSA, ASTM & ACI standards for durability criteria, they both retain +90% of ultimate tensile capacity after 2160 hours of direct exposure to an alkali solution with a pH level of 13 at 60 degrees Celsius, in comparison to steel, GFRP rebar is much more resistant than the highest grade of stainless steel.

 

Q: What is the maximum operating temperature of MST-BAR®?

A:  MST-BAR® and other GFRP bars that comply with CSA, ASTM, and ACI standards, which have a glass transition temperature of above 110 degrees Celsius, can be in direct contact with heat up to 110 degrees Celsius without losing strength. MST-BAR® at 400 degrees Celsius will lose its tensile strength from 1400 MPa to about 650 MPa, which is still higher than steel rebar at room temperature

 

Q: What is the minimum operating temperature of MST-BAR®?

A:  MST-BAR® was tested according to CSA & ACI standards at -40 degrees Celsius, and the effect was zero and in some case increases in performance.