热解加酶解制备淀粉基水泥水化热调控材料  

Preparation of starch-based cement hydration heat regulating material by pyrolysis and enzymatic hydrolysis

作　　者：吕志锋[1,2] 于诚[1,2] 佘维娜[1,2] 吴井志[1,2] 张建纲[1,2] 冉千平[1,2] 

机构地区：[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

出　　处：《新型建筑材料》2015年第5期1-3,32,共4页New Building Materials

基　　金：国家自然科学基金项目(51302114,51408270,51408274);江苏省自然科学基金项目(BK20131010,BK20131011)

摘　　要：通过将玉米淀粉热解并且酶解制备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%以上。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2 h,加50 U/g淀粉的中温α-淀粉酶50℃水解4h,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。A cement hydration heat regulating material,which was prepared by pyrolysis and enzymatic hydrolysis of corn starch,can reduce the cement hydration exoihermic 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： corn starch was pyrolyscd at 240 ℃ for 2 h, enzymatic hydrolysis was carried out with 50 U/g of starch of mid-temperature a-amylase at 50 ℃ for 4 h, smaller sugars were removed by addition of 30% volume of ethanol. The cement hydration heat regulating material prepared in this condition ex2 tended the setting time of concrete slightly,but had no influence on the later strength.

关 键 词：水化热调控材料 玉米淀粉 中温α-淀粉酶 热解 酶解 

分 类 号：TU528.042[建筑科学—建筑技术科学]