by compounding jd with hpp, the " overlapping effect " of two kind superplasticizers was fully manifested . the compatibility of jd with cement and keeping slump value were more improved through this compounding way . meantime, the bleeding and segregation of hpp were overcome too jd和hpp復(fù)合使用,可充分發(fā)揮高效減水劑的“疊加效應(yīng)”,進(jìn)一步提高jd與水泥的適應(yīng)性,坍落度保持性能,也克服了氨基磺酸鹽高效減水劑泌水離析等缺陷。