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4-hour fire resistance for Hilti HIT HY150 & HIT RE500
4-hour fire resistance for Hilti injection adhesives
Hilti?s HIT-HY150 and HIT-RE500, two of the strongest construction injection adhesive systems in the market, have been certified by the UK-based international approval organization Warrington Fire Research Center, as the only system of its kind to have a 4-hour fire resistance.
The Warrington Report (WFRC No. C121086), published on 11 September 2002, confirms the tests results conducted by the Institut F?r Baustoffe Massivbau und Brandschutz (IBMB), University of Braunschweig in Germany, in accordance to the principles of British Standards 476:Part 20. These tests evaluated the fire performance of HIT HY150 and HIT RE500 in concrete structures using different rebar sizes ranging from Y8 to Y40. Results show that they are capable of upholding their loading capacity for up to 4 hours, doubling the previously rated 2 hours.
?The report cannot be more timely. It shows beyond doubt that these two Hilti systems provide the best and safest solution for the bonding of post installed rebars. No other injection adhesives on the market can offer this level of assurance,? said Rolf Biesser, Marketing Director, Hilti Hong Kong Ltd.
The Warrington Report (WFRC No. C121086), published on 11 September 2002, confirms the tests results conducted by the Institut F?r Baustoffe Massivbau und Brandschutz (IBMB), University of Braunschweig in Germany, in accordance to the principles of British Standards 476:Part 20. These tests evaluated the fire performance of HIT HY150 and HIT RE500 in concrete structures using different rebar sizes ranging from Y8 to Y40. Results show that they are capable of upholding their loading capacity for up to 4 hours, doubling the previously rated 2 hours.
?The report cannot be more timely. It shows beyond doubt that these two Hilti systems provide the best and safest solution for the bonding of post installed rebars. No other injection adhesives on the market can offer this level of assurance,? said Rolf Biesser, Marketing Director, Hilti Hong Kong Ltd.
?For specifiers and engineers, this stamp of approval would make their work easier combined with a high level of confidence,? he added.
Epoxy or resin base adhesive injection systems has not yet been considered as the preferred product for post-installed rebar fastenings by local builders and government authorities. This is largely because there is insufficient testing to prove the fire resistance performance of products, and partly due to historical preference for more traditional fastening substances such as cement grout.
Cement grout not only has the disadvantage of requiring much higher embedment depths, its fire resistance properties have not been officially proven in Hong Kong. Injection adhesives, on the other hand, requires as little as 50% less embedment depth, thereby saving the contractor labor and time especially in serial fastenings.
With the increasing need for higher flexibility in design and rehabilitation work of existing structures, post-installed reinforcement has been gaining importance. Hilti?s new 4-hour approval will be welcome by the engineering and construction community because it clears the path for the adoption of injection adhesives, an obviously more efficient method for rebar installation and reinforcement work.
Epoxy or resin base adhesive injection systems has not yet been considered as the preferred product for post-installed rebar fastenings by local builders and government authorities. This is largely because there is insufficient testing to prove the fire resistance performance of products, and partly due to historical preference for more traditional fastening substances such as cement grout.
Cement grout not only has the disadvantage of requiring much higher embedment depths, its fire resistance properties have not been officially proven in Hong Kong. Injection adhesives, on the other hand, requires as little as 50% less embedment depth, thereby saving the contractor labor and time especially in serial fastenings.
With the increasing need for higher flexibility in design and rehabilitation work of existing structures, post-installed reinforcement has been gaining importance. Hilti?s new 4-hour approval will be welcome by the engineering and construction community because it clears the path for the adoption of injection adhesives, an obviously more efficient method for rebar installation and reinforcement work.
The newly developed HIT RE500 epoxy injection adhesive, with a high bond strength to achieve the yield strength of rebar 460N/mm2 with only 10D embedment, is especially suited for reinforcement bars and threaded rod applications in concrete. It provides the ideal solution for diamond and pneumatic drilled holes and works perfectly even if the holes are oversized, wet or underwater. Its unique foil pack design and matching dispenser enable an accurate mixing ratio with a pull of the trigger and minimizes waste of mortar compared to hard cartridges.
In addition, Hilti injection adhesives, HY150 and RE500, are styrene free and odorless, which means they pose a considerably lower cancer risk than other injection adhesives in the market, and are extremely environmentally friendly and easy to dispose of.
To obtain a copy of the Warrington Report (WFRC No. C121086), please contact Alex Cheung at 2773-4734 or at e-mail cheuale@hilti.com.
In addition, Hilti injection adhesives, HY150 and RE500, are styrene free and odorless, which means they pose a considerably lower cancer risk than other injection adhesives in the market, and are extremely environmentally friendly and easy to dispose of.
To obtain a copy of the Warrington Report (WFRC No. C121086), please contact Alex Cheung at 2773-4734 or at e-mail cheuale@hilti.com.