Interaction between cements with different composition and superplasticizers


  • H. Y. Ghorab Helwan University
  • I. M. Kenawi Cairo University
  • Z. G. Abdel All Arab Dairy Products Co



cement, superplasticizers, compatibility, fluidity, minislump


The slump behavior of ordinary Portland-, pozzolanic (red brick powder)-, sulfate resistant-, and limestone cement pastes caused by ≤ 1% additions of polycondensates and polycarboxylates superplasticizers are monitored for up to 90 minutes. With the plolycondensates, Portland- and pozzolanic cements gain fluidity at higher dosages than sulfate resistant and limestone cements. Limestone cement shows the best slump retention. The aluminate and sulfate phases play a major role in the fluidity. With the polycarboxylates, all cements gain fluidity with dosages of ≤ 0.3%. A polycarboxylate with no resonance of methyl methylene proton in the main chain identified in the NMR spectra creates good slump retention. This is explained by a low mobility of the structure and the predominance of the steric effect. The polycarboxylate shows also strong ether bands relative to the ester groups in the IR spectra and a low polydispersity observed in the elution of few low molecular weight species in the HPLC chromatogram.


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How to Cite

Ghorab, H. Y., Kenawi, I. M., & Abdel All, Z. G. (2012). Interaction between cements with different composition and superplasticizers. Materiales De Construcción, 62(307), 359–380.



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