effect of clinker phase changes on cement performance and its reactivity with super plasticizer additive

effect of clinker phase changes on cement performance and its reactivity with super plasticizer additive

based  on  various  sources  and  experiences,  the  main  phases  of  clinker  significantly  impact  the  technical characteristics of cement and its performance in the resulting concrete. the interaction of clinker phases with concrete admixtures is also obvious, but the effect of each phase and their optimal values for optimal concrete performance is complicated.

therefore, in this study, this issue was an extensive laboratory operation was designed.  so  11  samples  were  selected  whose  phase  values  were  varied.  then laboratory cement was performed under the same conditions using 11 clinker samples, and physical and chemical analysis of cement samples was performed.

 so  22mixtures  were  prepared  so  that  11mixtures  with  the  title  of  control  and 11mixtures  with  the  title  of  additives.  based  on  the  results,  comparing  the  effect  of  c3s  clinker  on  the compressive strength of standard mortar and concrete showed  that there  is no  direct correlation between c3s and compressive strength, but it can be said that with each percentage increase of c3s clinker, about 1.5 unit (kg/cm2).

however, with the  increase of c3s from about 57% onwards,  the decrease in concrete strength is clearly seen, which can be referred to as the negative effect of excessive c3s phase (due to the solubility of concrete and increasing the w/c ratio). based on the results of air determination experiments of fresh concrete mixtures containing additives and its declining trend in this study, it was found that the optimal value of c3a is about 5-6%.