热解加酶解制备淀粉基水泥水化热调控材料.pdfVIP

学兔兔 杆鬼 巍 中国科技核心期刊 热髓力口酶触制备淀粉基 水泥水化热调控材料 吕志锋 ，于诚 z，余维娜“ ，吴井志 ，张建纲 ，冉千平 (1．江苏苏博特新材料股份有限公司，江苏 南京 211103； 2．高性能土木工程材料国家重点实验室，江苏省建筑科学研究院有限公司，江苏 南京 210008) 摘要：通过将玉米淀粉热解并且酶解制各了一种水泥水化热调控材料，可降低水泥水化放热速率峰值60％~t-。通过水泥水化热 和凝结时间测试，所筛选出的水化热调控材料最佳合成条件为：玉米淀粉240℃热解2h，加50U／g淀粉的中温a一淀粉酶5O℃水解4 h，加30％体积的乙醇(除小分子糖)。在此条件下制备的水泥水化热调控材料略微延长了混凝土凝结时间，但对后期强度没有影响。 关键词：水化热调控材料；玉米淀粉；中温a一淀粉酶；热解；酶解 中图分类号：TU528．042 文献标识码：A 文章编号：1001—702X(2015)05—0001—03 Preparation of starch-based cement hydration heat regulating material by pyrolysis and enzymatic hydrolysis LV ，YU e ，SHE Weina ，WU Jingzhi“ ，ZHANG Jiangang1 ，RAN Qianpinga (1．Jiangsu Sobute New Materials Co．Ltd．，Nanjing 211103，Jiangsu，China；2．State Key Laboratory of Hish Performance Civil Engineering Materials，Jiangsu Research Institute of Building Science，Nanjing 210008，Jiangsu，China) Abstract：A cement hydration heat regulating material，which was prepared by pyrolysis and enzymatic hydrolysis of corn starch，can reduce the cement hydration exothermic rate peak more than 60％．Selected by cement hydration heat and setting time test，the optimum conditions for the preparation of the cement hydration heat regulating material：coln starch Was pyrolysed at 240 ℃ for 2 h·enzymatic hydrolysis was carried out with 50 U／g of starch of mid-temperature —amylase at 50℃ for 4 h，smaller sugars were removed by addition of 30％ volume of ethano1．The cement hydration heat regulating material prepared in this condition ex- tended the setting time of concrete slightly，but had no influence on the later strength． Key words~hydration heat regulating materia