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…)
Scenario: A young couple is excited about buying their first home. They pick it out from a catalog of house plans from the developer of a new neighborhood in town. It will be a brand new construction starter type bungalow home on a slab-on-grade foundation. For a cost adder, which is considerable to them, they decide to upgrade the finished flooring from carpeting to hardwood laminate. Unfortunately, after only a few weeks of residency, the hardwood planks begin to buckle and separate from the slab throughout the house. They do not know what is causing it, or what to do to remedy it, (more…)
The wet, relatively warm weather recently experienced in the southeast has caused a high incidence of mold and other fungal growth complaints in homes and other structures. Engineers at Warren are often called upon to investigate the cause(s) of these problems. (more…)