Foundation Stabilization and Repair/Foundation cracking
Dear Mr. Randy,
I would like to ask a question relating the cracking of several pump foundation. The thickness of pump foundation is 700 mm and the part above ground is 300 mm. Now all pumps foundation have cracks around paralleled to the ground and located 10 cm above ground as images attached
Is this crack due to fatigue loading? and how to repair it?
the width of these cracks are 8-10 mm.
Thank you very much
There is no mention of settlement of the foundation,simply cracking. The cracking could be a result of either a lack of reinforcement steel within the foundation and/or possible degradation of the reinforcement from exposure to chemical or environmental elements. One repair approach, in an effort to prolong the life of the foundation would be an Epoxy Injection System. This typically involves a process of gluing injection ports at intervals along the crack and "face sealing" the crack and ports. A two part epoxy is then injected with a caulking type gun, into the ports. There are a number of these types of products in the market.
Another option would be the use of a Carbon Reinforced Fiber strip that can be bonded over the cracks which will assist in reinforcing and prolonging the lift of the foundation. As with Epoxy Injection, there are a number of "Carbon Fiber" products in the market.
Hope this helps!