The primary purpose for grout under machine baseplates is to reduce vibration and maintain structural integrity with the foundation for as long as the machine is operable. Selecting the right grout material and using the correct placement technique is critical to machine alignment, integrity and longevity.
Understanding the type of compressive load, uplift, shear and vibration between the machine and its foundation will determine the type of grout needed under a machines baseplate based upon performance characteristics. Cementitious non-shrink, and epoxy resin grouts are the most commonly used baseplate grouts, followed by high chemical resistant and high temperature grouts. Large, heavy rotating machines with a skid mount steel baseplate may require epoxy grouts with high compressive strength, impact and uplift properties compared to a general purpose cementitious grout with lesser properties. Conditions with chemical contamination or spills around the baseplate foundation will require chemical resistant grout. Machines such as gas turbines which produce internal heat distributed through the foundation may require high strength and high temperature grout characteristics.
Anchor bolts must be grouted in before filling the gap between the foundation and machine baseplate. Proper surface preparation achieving a minimum ¼” amplitude surface profile by chipping or aggressive abrasive grit blasting and removing any primer or coating from the base plate prior to the installation of baseplate grout ensures a mechanical bond. Proper mixing, temperature or pot life of the grout during installation depends on the qualifications of the contractor for all grout placement. Tapered excess grout beyond the perimeter of the plate is more cosmetic to allow liquid runoff and prevent tripping while beveled edging prevents chipping off of grout edges.
Some additional considerations for every application:
Providing base plate grouting services with excellent customer service is a specialty of ours at Epoxy Design Systems. We provide domestic and international services to help as many people as possible with their concrete repair and restoration needs. Give us a call today at 713-461-8733 or contact us online for a consultation.