A Portland cement clinker related diffusion couple, having end-members C3S + C2S + melt and C + C3S + melt, respectively, was annealed at 1500oc for 60 minutes. After quenching it was sectioned and studied by electron microprobe.
The local compositions measured were plotted in the phase diagram.
The composition path, thus derived, roughly consists of three linesections, forming an S.
Simple liquid-liquid diffusion couples, having compositions near that of the cement clinker interstitial, show similar features. These observations are to be expected from the general principles of ternary diffusion processes.
Et diffusionspar med tilknytning til Portland cementklinker, bestAende af henholdsvis C3S + C2S + smelte, og C + C3S + smelte, blev varmebehandlet ved 1500oc i 60 minutter. Efter hurtig afk#ling blev en snitflade gennem proven unders~gt med elektronmikrosonde.
De mAlte lokale sammensatninger blev indtegnet i fasediagrammer, og den resulterende diffusionsvej bestAr i store trak af tre liniestykker, der danner et S. Simple smelte-smelte diffusionspar, med sammensatning i narheden af cementklinkers interstitielsmeltefase, viser lignende diffusionsveje.
Disse observationer kan forventes ud fra de principper, der g~ider for ternare diffuslonsprincipper.