【摘要】 通过马来酸酐(MA)和聚乙二醇(PEG)酯化,再与丙烯酸缩聚的技术路线,研究水泥助磨剂的合成工艺及其助磨效果.结果表明:在n(MA)∶n(PEG)=1.4∶1.0、合成反应温度90℃、反应3 h、保温1 h、引发剂的质量为单体质量的2%时,合成的助磨剂助磨效果最佳.在500 mm×500 mm实验磨、助磨剂掺量0.05%、粉磨时间36 min的条件下,水泥的0.08 mm方孔筛筛余降低74%,勃氏比表面积提高19.8%,水泥砂浆3 d抗压强度提高10.5%,28 d抗压强度提高8.3%.更多还原

【Abstract】 In order to synthesize homogeneous and efficient cement grinding aids,the following reaction routes were taken: maleic anhydride(MA) and polyethylene glycol(PEG) esterification;and the synthesis of a new type of cement grinding aids.The synthetic process of cement grinding aids and their grinding effect were discussed.Results showed that the optimun conditions were as follows: the mole ratio of MA to PEG 1.4∶1.0,reaction temperature 90 ℃,reaction time 3 h,incubation 1 h,and initiator of monomer 2%,the obtained synthetic grinding aids were better.Under the conditions of 500mm×500mm grinder,grinding aids ratio 0.05%,grinding time 36 min,the fineness of cement(0.08 mm sieve),Bo′s specific surface area,3 d compressive strength of cement mortar,and 28 d compressive strength was increased by 74%,19.8%,10.5%,and 8.3%.更多还原