Effect of Superplasticizer Dosage on Workability and Strength Indonesia

  • Effect of Superplasticizer Dosage on Workability and Strength Indonesia
  • Effect of Superplasticizer Dosage on Workability and Strength Indonesia
  • Effect of Superplasticizer Dosage on Workability and Strength Indonesia
  • Does superplasticizer affect workability of concrete?
  • The influence of a superplasticizer on workability of concrete confirmed that slump of fresh concrete can be optionally controlled in all mix- designs if Superplasticizer is added. Since workability of low water/cement ratio concrete is difficult to control, addition of Superplasticizer can usefully maintain the initial slump of mixed concrete.
  • Does superplasticizer increase compressive strength?
  • The results show that the highest compressive strength at 28 days was achieved at 3% dosage of superplasticizer, while the highest compressive strength at 7days achieved at 1% dosage. Whereas, using higher dosage of superplasticizer resulted in a lower compressive strength with very high slump value.
  • What are the effects of superplasticizer?
  • Effects of superplasticizer are obvious, i.e. to produce concrete with a very high workability or concrete with a very high strength. Mechanism of superplasticizer is through giving the cement particles highly negative charge so that they repel each other due to the same electrostatic charge.
  • What happens if a superplasticizer is overdosed?
  • This phenomenon occur since over dosage of superplasticizer will cause bleeding and segregation, which will affect the cohessiveness and uniformity of the concrete. As a result, compressive strength will reduce if the used dosage is beyond the optimum dosage. VI. Conclusions
  • How many l/m3 can a superplasticizer be used?
  • However, the dosage can be increased to as high as 5- 20 l/m3. Since concentration of superplasticizer is different, any comparison of performance should be made on the basis of the amount of solids, and not on the total mass. Effectiveness of a given dosage of superplasticizer depends on the water/cement ratio.
  • Does superplasticizer have a strength gain for chemical admixture concrete?
  • It also visible from experiment that superplasticizer has a locontinuous strength gain for chemical admixture concrete is observed by the increase in compressive strength with age. At early age (1- 7 days from casting), the rate of strength gain is high since the reaction between the cement particles and water is active.

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