In a previous blog, I discussed issues with moisture intrusion into concrete slabs-on-grade. In this blog, I will examine methods to address issues with moisture intrusion into concrete slabs, including preventative measures and mitigation techniques.
Scenario:The owners of Jones’ Marine, a marina with a wharf structure on a tidal saltwater river, cater to the operators of ships, barges, and large yachts. There are both diesel and gasoline fuel pumps at the edge of the wharf. In addition, a large mobile crane for lifting the large vessels out of the water for maintenance is in service at the wharf. This crane is driven out to the edge of the wharf deck suspended over the water, subjecting this deck and the structure beneath it to very high loading. They purchased the property from its former owners about 10 years ago and are conscientious about maintenance and upkeep of their thriving facility. They decide it is time to have a survey performed of the condition of the precast reinforced concrete piles and pile caps beneath and supporting the concrete wharf platform/deck. They are alarmed at what is discovered by this survey: Significant spalling (more…)