Compatibility of Superplasticizers with Different Cements Sri Lanka

  • Compatibility of Superplasticizers with Different Cements Sri Lanka
  • Compatibility of Superplasticizers with Different Cements Sri Lanka
  • Compatibility of Superplasticizers with Different Cements Sri Lanka
  • Are superplasticizers compatible with blended cements?
  • In the present study, the compatibility between two types of commercially available blended cements and two types of superplasticizers are experimented for each combination. The optimum dosage of the superplasticizers is identified using marsh cone test and mini slump test for each of the combinations.
  • Which superplasticizer is compatible with slag blended cement?
  • The best compatibility is found between the polymer based superplatizer and slag blended cement. Keywords: - cement, superplasticizers, marsh cone test, mini slump test, compressive strength, split tensile strength, flexural strength, saturation point and retention time.
  • How do superplasticizers affect the workability of concrete?
  • Superplasticizers directly influence the workability of concrete, and certain factors are considered such as type of admixture, time of addition, addition sequence, mixing time, dosage, w/b ratio, and amount/nature of binder. The dosage between 0.6 to 2% by weight of cement resulted in minimal retardation.
  • What is the W/B ratio of superplasticizers?
  • A varying w/b ratio depending on the influence of superplasticizers, silica fume of 15%, and glass fiber of 2.5% to the weight of cement was maintained throughout the study. Superplasticizers are of three types such as SNF, SMF, PC and each admixtures were incorporated at 0.5, 1, 1.5, and 2% by weight of cement.
  • What is the maximum tensile strength of a superplasticizer?
  • The maximum split tensile strength at 28 days of testing for all cases was found to be 29.09 MPa—SNF based, 30.72 MPa—SMF based, and 31.23 MPa—PC-based admixture, respectively, at 1.5% of dosage (Fig. 6). Therefore, the effect of superplasticizers mainly influences the workability of concrete rather mechanical properties.
  • What is a superplasticizer in cement?
  • According to ASTM C494, superplasticizers are linear polymers that possess a sulfonic acid group. The addition of superplasticizers into a mix neutralizes the surface interaction among the cement particles and thus, reduces the viscosity of cement paste (free from agglomeration) resulting in reduced pore volume.

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