Concrete Inspection and Investigation Services

Concrete Floors

cracking in concrete floor Floors are an important operational component of industrial buildings. However, concrete floors can often be a source of problems both during construction and subsequently during service. Cracking, staining, poor abrasion resistance, chemical attack and other defects have all been observed in recently constructed buildings.

Corrosion Risk Assessment of Reinforced Concrete Bridges

Covermeter survey The full scope of Special Inspection testing for corrosion risk assessment by half-cell potential, cover, resistivity measurements and chloride analysis is undertaken by Sandberg who have established in-depth expertise and experience in this work. Other tests for strength, composition and alkali reactivity are also undertaken.

Ferroscan Concrete Cover Surveys

Ferroscan image As part of our comprehensive structural investigation service we offer the Ferroscan FS 10, a portable detection, measuring and mapping system which provides an immediate liquid crystal image of the reinforcement within the survey area.

High-Alumina Cement Concrete

Microscopical examination of thin-section HAC differs from Portland cement, being composed of calcium aluminates rather than calcium silicates. Its rapid strength development made HAC popular for precast concrete in the UK during the 1960s. Mineralogical ‘conversion' however, sometimes caused catastrophic reductions in concrete strength and increased vulnerability to chemical degradation.

In-Situ Stress Measurement in Concrete

In-situ stress measurement in concrete Two techniques have been devised to measure the in-situ stress in reinforced and pre-stressed concrete members. Both techniques involve instrumenting the concrete surface prior to the release of local stresses either by coring or saw cutting. Measurement of the consequent strain changes in conjunction with knowledge of the elastic modulus of the concrete yields a measure of the in-situ stress.

Inspection of Precast Concrete

precast concrete bridge unit Sandberg has built up a team of experienced inspection staff over many years, strategically situated in close proximity to the major precast concrete manufacturers in the United Kingdom. The ability to provide a quick response nationwide, combined with the integration with the Firm's other disciplines.