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 © Copyright: Conwy Valley Systems Limited  2000-2022

Conwy Valley Systems Limited,

West Acre,Llys Helyg,Deganwy

CONWY LL31 9BN, United Kingdom.

VAT# GB 741 5190 48

A Geoscience Wales  founding member.

Point-counting is an important tool for quality assurance of cement clinker. Visual examination of the material using reflected light microscopy on polished blocks is essential for ascertaining the mineral composition in addition to the chemical composition given by XRD/XRF techniques. Point counting is primarily used to determine the relative proportions of four constituents: alite, belite, aluminate, and ferrite.

PETROG is uniquely able to provide support for cement clinker analysts in acquisition of the petrographic information from polished blocks, combining compositional and textural data, and analysing them both together and separately.

Cement Clinker

Unique contributions to cement clinker petrography arise from:

• The ability to easily draw separate grain size histograms for each material type logged, to separate out the size distributions for Alite, Belite and voids, and hence isolate how much each of the different process features affect the clinker
• Calculation of statistics on changes with time or any other marker, when samples are in a sequence
• Continuously calculating variance measures during logging, to guide a choice on when to stop point-counting, hence saving valuable time and ensuring consistent quality of analysis
• Overcoming the difficulties of colour differentiation within clinkers, arising from inconsistencies in the etches and the patchy colour produced, by using our superior colour analysis based on a patented learning algorithm.