Beta Steel’s caster roll out table experienced broken anchor bolts and failed grout due to the vibration caused by the lack of hold down pressure from the bolts. Since the maintenance shutdown time for these repairs was short, the repairs had to be completed quickly. UltraFlow 4000/8 was chosen for it's rapid strength gain.
Komponent was used at a 16% dosage rate, which replaced 16% of the total portland cement and fly ash content in the original mix design. The Komponent non-shrink grout material achieved the 7000 psi design requirement and achieved designed shrinkage compensating expansion. Gate installations were completed successfully.
During the course of normal operations at Ispat-Inland Steel’s mill, several sections of the 64" hot strip discharge table came loose due to broken anchor bolts and failed grout. Due to the short down time, a conventional precision grout could not be used. UltraFlow 4000/8 precision grout was recommended.
The base for this equipment measured 6 feet by 2 feet 3 inches and the grout was to be 3 inches thick. UltraFlow easily provided enough working time and flowability to be placed under the plate and still reach the required strength of 4000 psi in the short 8 hour window that remained for the project. Product used was UltraFlow 4000/8.
A non-shrink grout was required to secure the piles in order to avoid voids that might absorb water in the nail tubes and cause corrosion of the steel. Type K Shrinkage Compensating cement grout was specified to meet these needs and mixed in ready-mix trucks for the 366 foot-long by 50 foot-wide project area.
UltraFlow 4000/8 was chosen to grout the panels on SR 18/Snoqualmie Parkway and nearby local intersections. The grout was pumped under the precast panels and achieved a minimum 500 psi to quickly open to traffic.
CSA cement is a proven technology for the underground construction industry. The fast set time, high strength, low porosity, high chemical stability and sulfate resistance make it a material uniquely suited for underground repairs, shotcrete and other applications as needed.
Graycor Project Superintendent said, "The grout was easy to install and flowed under the fan base plate better than expected. The switch to UltraFlow helped to get this phase of the project back on track and completed on time." Product used was UltraFlow 4000/8.