Our expertise encompasses a multitude of concrete mixtures for various applications that we engineer and qualify for the specified performance and constructability.  Twining laboratories are equipped for simulating the production, consolidation, and curing of cast-in-place and precast concrete. 

Our petrographic group has grown from a nationally and internationally renowned company DRP, which Twining acquired in 2017.  We are specialized in optical and scanning electron microscopy, EDS, chemistry, and other analytical methods used for quality control and forensic studies of concrete, mortar, stucco, terrazzo, and other cementitious-based materials, as well as aggregates.  The petrographic laboratory is audited by CCRL and accredited by AASHTO re:source and USACE. 

We assist our clients with urgent troubleshooting of concrete production and construction practices for conditions and mechanisms causing defects, develop recommendations to prevent reoccurrence and validate the soundness of repairs.  Twining’s consultants possess extensive expertise in troubleshooting and have at their disposal comprehensive nondestructive and destructive testing support, as well as petrographic and other analytical methods. 

Twining provides a wide spectrum of forensic services which are focused on material and construction practice-related mechanisms affecting plain and reinforced concrete structures and pavements.  These include cracking, near-surface delaminations, salt crystallization erosion, alkali-silica reaction, sulfate and microbial corrosion, freezing-and-thawing deterioration, other concrete durability affecting mechanisms, corrosion of reinforcing steel, discoloration, and others.  We also provide forensic petrography for masonry mortars, stucco, and other cementitious-based materials.  Our team evaluates the impacts of construction specifications and practices on distress/cracking.  We provide dispute and litigation support consulting and expert services.