Petrographic Analysis

Looking for an independent, reputable third-party, petrographic analysis of concrete, mortars, building stone and other geological materials?  Lucideon performs petrographic analysis to evaluate the integrity of concrete and understand the mineralogy of materials.

Our evaluations can answer the following types of questions:

  • Did the materials used match the concrete mix design?
  • Is the air content entrapped and entrained porosity?
  • Has it cured correctly?
  • Is there evidence of deleterious degradation of the concrete?
  • What is the geological provenance of the stone?

Test methods we perform include:

Petrographic analysis (ASTM C856) A microstructural examination by optical and scanning electron microscopy (SEM) of the paste and aggregate on a prepared sample of concrete to look for features such as degree of cement hydration, microcracking, reaction products, breakdown of aggregate and evidence of poor freeze-thaw performance. A mineralogical assessment of the aggregate is also performed to determine if appropriate aggregate was used and if it caused any deleterious reactions.

Air void analysis (ASTM C457) Performed on polished core cross-sections using state-of-the-art calibrated image analysis software. This analysis provides detailed information about the relative composition and distribution of coarse and fine aggregate, cement paste, entrained and entrapped air.

FTIR analysis Utilized to identify contaminants and verify the composition of binders, epoxies, coatings, and other organic materials.

Petrographic analysis of natural stone (BS EN 12407) microscopic examination of macro and micro samples enables rock types to be described according to recognised standards and terminology (BS EN 12670) and defined. From the petrographic examination and knowledge of the origin of the stone, denomination criteria can be assigned (BS EN 12440).
Provides an unambiguous definition of the stone.

Petrographic analysis of agglomerated stone (BS EN 14618) Provides standard means for describing agglomerated stone, these are products in which rock fragments are bonded to form a solid block that is then cut and polished as if it were natural stone.

Petrographic analysis of natural stone tiles (BS EN 12057) Enables the characteristics of natural stone tiles to be assessed and described using microscopic examination.

Petrographic analysis of slate and roofing tiles (BS EN 12326-2) Characteristics of natural slate tiles are evaluated for lamination and degradation using microscopic techniques.

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