724-834-3551

Construction materials consultants, inc.

Serving the Industry through Testing, Investigation, Evaluation, & Research

it is the wide variety of projects from our clients that keeps our profession exciting as well as challenging


projects


Quality Assurance
 

  • Evaluation of aggregates (gravel, crushed stone, natural sand, manufactured sand, lightweight, heavyweight) for physical and chemical soundness in concrete, mortar, fill materials, etc.
  • Composition and overall condition of concrete from a structure
  • Composition and condition of mortar
  • Mortar type determination - M, S, N, O (ASTM C 270)
  • Determining the mix composition of an existing mortar to find a suitable match
  • Evaluation of strength, durability, freeze-thaw resistance, efflorescence, and integrity of bricks and concrete masonry units
  • Composition and condition of various concrete products
  • Verification of the presence of a particular mix ingredient (e.g., fly ash, slag) in a concrete
  • Evaluation of various building stones for durability and composition (granite, marble, limestone, slate)
  • Evaluation of fill materials for potential expansion

 
Failure Investigation
 

  • Lower than designed strength of concrete
  • Driveway scaling due to inadequate air entrainment
  • Surface scaling due to improper finishing
  • Popouts due to freezing of near-surface, water absorptive and alkali-silica reactive aggregates in concrete
  • Mortar lift-offs due to improper finishing
  • Warehouse floor delamination due to trowel finishing an air entrained concrete slab
  • Delamination due to premature and prolonged finishing
  • Surface discoloration due to differential water-cement ratios
  • Efflorescence on floor tiles due to moisture upwelling
  • Surface blemishes, blisters on floor tiles
  • Cracking due to alkali-aggregate reaction
  • Loss of mass and strength due to sulfate attack
  • Cracking and popouts due to delayed hydration of free lime and magnesia
  • Cement and concrete burns
  • Cracking due to differential shrinkage
  • Moisture expansion of construction materials
  • Early freezing of plastic concrete
  • Late freezing of hardened concrete
  • Cracking due to delayed ettringite formation
  • Cracking and curling of slab due to differential moisture conditions
  • Cracking and curling of slab due to differential thermal conditions
  • Bowing and dishing of stone and precast concrete panels due to differential moisture and/or thermal conditions
  • De-bonding of floor tiles
  • Cracking of stucco and other plaster finishes
  • Corrosion of concrete, mortar, and sewage pipes
  • Warehouse slab surface abrasion due to improper design and construction practice
  • Corrosion of steel in concrete due to chloride ingress and carbonation
  • Drying and plastic shrinkage cracking in concrete
  • Paint failure from drywalls and from concrete floors
  • Cracking and water infiltration in masonry structures
  • Efflorescence on masonry surfaces and brick pavers
  • Cracking, spalling, and lifting of non-shrink, anchoring and patching grouts