Category: Historical Building
Client: Local Geotechnical & Structural Engineering Companies
Condition assessment and repair recommendation for 100+ year old Hall of Records in Bakersfield, CA.
Severe Reinforcement Corrosion
Hall of Records, a building built in 1908, showed extensive damage to foundation from reinforcement corrosion and related cracking.
Concrete Science, Inc. performed following tests to determine the cause and extent of reinforcement corrosion and provide repair options:
The beams and columns were scanned for reinforcement and then core d to expose the reinforcement. The exposed reinforcement was used to conduct half - cell electrical corrosion potential test to determine the degree of reinforcement corrosion
Powder sample from concrete beams, columns, footings, and walls were obtained for chemical analysis to determine chloride content concrete
Soil samples were obtained from locations adjacent to the columns and footings for determining, chlorides, sulfates, resistivity, and pH
Performed nondestructive Schmidt Hammer Testing on various columns, beams, walls, and elevated slab to estimate concrete compressive strength
The repairs consisted of rebuilding portion of the distressed structure using high performance concrete , isolating footings from corrosive soil , and providing coating system to protect concrete from aggressive environment.