Experimental Study on Compounding of UHPC Special Water Reducer
In this paper,the best water-reducing agent and the best water-reducing rate are selected from the four water-reducing agents of Sika,the optimum dosage of defoamer was determined by fluidity,compactness and strength of 40 mm×40 mm×160 mm specimens.The re-sults show that the water reducing rate of 20SP and Mk Is the best,and the adaptability of 20SP is the best.The density and strength of UHPC are affected by different content of defoamer.The test results show that the best effect is when the content of defoamer is 0.6%of the cementi-tious material,the bending strength of UHPC strip is 23.1 MPa,the compressive strength is 143.4 MPa,and the difference between the strength and that of imported UHPC special water reducer is less than 1MPa.
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