广州化工
廣州化工
엄주화공
GUANGZHOU CHEMICAL INDUSTRY AND TECHNOLOGY
2012年
22期
77-80
,共4页
聚羧酸减水剂%工艺优化%一步一釜法
聚羧痠減水劑%工藝優化%一步一釜法
취최산감수제%공예우화%일보일부법
polycarboxylic type superplasticizer%process optimization%"one step and one kettle" method
根据分子设计的原则,采用＂一步一釜法＂合成出一种带长侧链聚醚基团、羧酸基团和磺酸基团的聚羧酸系高效减水剂。通过正交试验和单因素优化,最佳制备工艺为n（mPEG）∶n（MA）∶n（MAS）=1∶6.875∶0.75,APS用量为单体总重量的3.5%,80℃反应2.5 h后90℃再反应0.5 h。聚羧酸减水剂的掺量为0.8%时,C40混凝土的初始塌落度为235 mm,1 h后塌落度为85 mm,含气量为3.8%,28 d的强度高达62.7 MPa。
根據分子設計的原則,採用＂一步一釜法＂閤成齣一種帶長側鏈聚醚基糰、羧痠基糰和磺痠基糰的聚羧痠繫高效減水劑。通過正交試驗和單因素優化,最佳製備工藝為n（mPEG）∶n（MA）∶n（MAS）=1∶6.875∶0.75,APS用量為單體總重量的3.5%,80℃反應2.5 h後90℃再反應0.5 h。聚羧痠減水劑的摻量為0.8%時,C40混凝土的初始塌落度為235 mm,1 h後塌落度為85 mm,含氣量為3.8%,28 d的彊度高達62.7 MPa。
근거분자설계적원칙,채용＂일보일부법＂합성출일충대장측련취미기단、최산기단화광산기단적취최산계고효감수제。통과정교시험화단인소우화,최가제비공예위n（mPEG）∶n（MA）∶n（MAS）=1∶6.875∶0.75,APS용량위단체총중량적3.5%,80℃반응2.5 h후90℃재반응0.5 h。취최산감수제적참량위0.8%시,C40혼응토적초시탑락도위235 mm,1 h후탑락도위85 mm,함기량위3.8%,28 d적강도고체62.7 MPa。
Based on the principle of molecular design,a polycarboxylic type superplasticizer was synthesized with long side-chain polyether group,carboxylic group and sulfonic group by the method of "one step and one kettle".The best reactant ratio were n(mPEG):n(MA):n(MAS)=1.0:6.875:0.75 and APS=3.5%,and the optimal reaction conditions were 80 ℃ for 2.5 h and then 90 ℃ for 0.5 h,which was obtained via orthogonal test and single factor optimize.The initial slump of C40 concrete containing the 0.8% superplasticizer was 235 mm and remained 85 mm after 1 h.Air content of the concrete was 3.8%,and its strength reached up to 62.7 MPa at 28 d.
