12/06/2011

SikaGrout 300 PT Marion Facility Lot Numbers

 


Over the past several months, Sika has been working aggressively to address reports that a limited number of lots of SikaGrout® 300 PT produced in its Marion, Ohio manufacturing facility contained cement, a raw material in SikaGrout® 300 PT supplied to Sika by a third party, with excessive amounts of chlorides. The presence of unanticipated chlorides in this third-party supplied cement, of which Sika was not aware, caused certain lots of SikaGrout® 300 PT produced at the Marion plant to exceed the chloride level listed on Sika’s Product Data Sheet and product label. This particular form of grout is used to limit corrosion of post tensioned support systems containing steel cable "tendons." There is a concern that, depending upon the level of elevated chlorides in the grout in installed locations, the risk of corrosion of the tendon strands could increase. While this issue could affect the long-term service life of certain infrastructure projects (roads, bridges, etc.) where the impacted grout was used, Sika is unaware of any damage to structures to date arising from this elevated chloride issue.

Production of SikaGrout® 300 PT was halted by Sika at the Marion, Ohio facility in March 2010 and has not resumed. The suspect cement, which is the source of the elevated chlorides in the SikaGrout® 300 PT, was supplied to Sika’s Marion plant only. This issue therefore is limited solely to this subset of the total number of lots of SikaGrout® 300 PT produced in the Marion, Ohio facility and does not impact SikaGrout® 300 PT manufactured at any other Sika production locations, which receive their cement from different third-party cement sources.

Marion produced SikaGrout® 300 PT is identified by the letter “M” at the end of the Lot Number, for example, “092730027M”. The only exception is a single Lot of Marion produced SikaGrout® 300 PT, Lot 3000015078, which does not include the “M” due to a change in the software system. [NOTE: SikaGrout® 300 PT from Lot Numbers ending with “MC” was not produced at the Marion, Ohio plant.] Lot numbers appear on all bags of SikaGrout® 300 PT regardless of the manufacturing location. Again, with the single exception noted, the only SikaGrout® 300 PT potentially impacted by this issue are bags from Lot Numbers ending in “M”. For some State Departments of Transportation and for some contractors, it is common practice to record the grout-bag identification number on the daily grouting inspection reports. If you have purchased or received SikaGrout® 300 PT from one of the affected lots or have any questions,  please contact Dave White, Director of Technical Service at Sika Corporation at 201-508-6678 or by e-mail at white.dave@sika-corp.com.

To address this issue, Sika has taken the following actions:

  • Suspended production of SikaGrout® 300 PT at its Marion, Ohio facility as of March 2010.
  • Imposed an enhanced quality-control testing regime in November 2010 (including specific testing of chloride levels) prior to shipment of SikaGrout® 300 PT from Sika’s other manufacturing facilities.
  • Engaged a team of independent and internationally recognized grout and corrosion experts to analyze the potential risks to the service life of the structure from in situ chloride-contaminated grout and to make professional recommendations.
  • Implemented a long-term testing protocol to evaluate the impact of elevated chloride levels in the performance of the grout.

Sika is also in the process of notifying contractors who purchased Marion produced SikaGrout® 300 PT as well as the owners of projects, including State Departments of Transportation, where potentially elevated chloride grout may have been installed to provide them with information regarding this issue. Sika is collaborating with those entities to conduct testing and forensic reviews in order to determine whether there is a long-term effect on the service life of the structure in question and to recommend remedial actions if needed.  Federal regulatory officials and industry groups have also been notified.

As noted, Sika is unaware of any damage to structures to date arising from this elevated chloride issue. We nonetheless encourage and support routine testing of all infrastructure projects to assure that these projects meet service requirements and continue to be safe for public use.