Sika India Pvt. Ltd, a 100% subsidiary of Sika AG commenced India operations in 1985 and was then known as Qualcrete India Limited. Qualcrete India Limited later forged an alliance with Sika AG, Switzerland and the company was renamed as Sika Qualcrete Limited. In 2002, Sika AG, Switzerland acquired 100% stake in the company and since then the company has been rechristened as Sika India Pvt. Ltd. Sika supplies to the building and construction industry as well as manufacturing industries (automotive, bus, truck, rail, solar and wind power plants, façades). Sika is a leader in processing materials used in sealing, bonding, damping, reinforcing and protecting load-bearing structures. Sika’s product lines feature high-quality concrete admixtures, specialty mortars, sealants and adhesives, damping and reinforcing materials, structural strengthening systems, industrial flooring as well as roofing and waterproofing systems.
Strengthening of Multi-Story Commercial Building in Gujarat:
The project was to strengthen the columns of a multi-story commercial building situated in Surat City, Gujarat. The building was affected due to fire accident on it one of the floor. After detail investigations, assessments and test it was concluded to demolish fire effected floors and reconstruct the same. The balance elements of the structure was found to be adequate however columns for four floors need to be strengthen. The various options were explored like Jacketing, Steel plate bonding and Fiber Wrapping.
The biggest challenge was to design / guidelines for various methods of strengthening. Sika India came into the picture and shared with them SikaWrap® & Sika®Carbodur® Software which has freedom to design as per ACI440/ SIA166/ TR55 guidelines on FRP.
“You can refer to below link for downloading SikaWrap® and Sika® Carbodur®Software”http://carbodur.web-app.sika.com or the same is available via Sika India website also.
By considering the overall cost on various methods of strengthening such as material cost, overall time to execute the job, accessibility, impact of present services it was concluded to use Carbon Fiber Wrapping.
Based on columns groupings, loadings and value engineering for layers required for confinement SikaWrap 450C & SikaWrap 600C were selected.