| Title |
The Effect of the Amount of Polycarboxylate Superplasticizer on the Properties of Ultra-High Performance Fiber-Reinforced Concrete |
| DOI |
https://doi.org/10.12652/Ksce.2018.38.1.0011 |
| Keywords |
초고성능 섬유보강 콘크리트;고성능감수제;유동성;압축강도;휨강도 UHPFRC;Superplasticizer;Flowability;Compressive strength;Flexural strength |
| Abstract |
As the amount of polycarboxylate superplasticizer varied from 1.2% to 3.0% of the mass of binder, the change in the flowability & rheological properties, and strength of UHPFRC was investigated with experiments. The test results presented that the increase in the amount of superplasticizer was effective in improving the flowability up to 1.8%, but addition more than 1.8% was hardly beneficial for enhancing the flowability and rhelogical properties. Compressive strengths with different amounts of superplasticizer showed that the strength with 1.8% was slightly higher than that of 1.2%, but the amount more than 1.8% caused strength reduction, which was higher as the amount increased. The results in flexural strength according to the amount of superplasticizer showed a similar trend with the results in compressive strength. When the effect of compressive strength and fiber distribution characteristics on the flexural strength was analysed separately, it was found that high amount of superplasticizer caused an effect of fiber distribution in addition to the effect of compressive strength on flexural strength. This effect seems to be closely related to the results of flowability or rheological properties. |