5) Sample picture of structural defect that need to investigate

(A). Relative movement of a concrete pier caused by the expansive forces generated by the adjacent retaining wall

B) Expansion of concrete causing extrusion of sealing material and spalling at the edge of

 sections of a five-year-old concrete pavement

C) Relative movement and associated spalling between a pier block showing  cracking 

and an adjacent deck slab causing spalling of concrete and extrusion of sealing material along the joint.

D) Cracking and spalling of concrete due to ASR in a 20-year-old median highway barrier; 

freeze-thaw action has greatly influenced the extent of deterioration.