以蔗糖及对氨基苯磺酸为原料高效减水剂的合成.pdf

全国中文核心期刊
新塑中
中国科技核心期刊
以療糖及对氨基磺酸为原料
高效减水剂的含成
李彦青',郝光明,罗应2,孔红星,李利军2,王勤为1
(1.广西科技大学生物与化学工程学院,广西糖资源绿色加工重点实验室,广西高校糖资源加工重点实验室,广西柳州545006;
2.广西科技大学鹿山学院,广西柳州545616
摘要:为开发绿色、经济、缓凝型高效减水剂,研究在酸性条件下,以蔗糖、对氨基苯磺酸为原料,通过工艺优化成功制备了
种新型绿色、缓凝型高效减水剂,并分别测试了水泥对减水剂的吸附量和水泥颗粒表面电位。同时,通过结构表征和性能分析表明:
减水剂分子中含有氨基、羟基、磺酸基、苯环、醚键等官能团;当减水剂折固掺量为0.5%时,水泥净浆流动度为265mm;当固体掺
量为0、%、0.7%和0.9%时,砂浆减水率分别达16.8%、21.5%和23.9%:水泥砂浆的抗压强度随减水剂掺量増加,3、7、28d砂浆抗压
强度呈先升高后降低,且掺量大于0.7%时出现假凝现象。该工艺绿色环保,成本低,产品使用安全且性能优异。
关键词:蔗糖;对氨基苯磺酸;高效减水剂:绿色环保
中图分类号:TU528,042.2
文献标识码:A
文章编号:1001-702X(2017)01-0081-05
Synthesis of superplasticizer with sucrose and p-aminobenzene sulfonic acid
L Yanqing, HAO Cuangming, LUO Ying, KONG Honging, L/ Lijun 2, WANG Qinweil
(1. College of Biological and Chemical Engineering, Guangxi Key Laboratory of Green Processing of Sugar Resources
Key Laboratory for Processing of Sugar Resources of Guangxi Higher Education Institutes, Guangxi University of Science and
Technology, Liuzhou 545006, China; 2. Lushan College of Guangxi University of Science and Technology, Liuzhou 545616, China)
Abstract: In order to develop a new environment-protected, economic and retarding superplasticizer, sucrose and p-aminobenzene
sulfonic acid were used to prepare green set-retarding superplasticizer in acidic conditions, and the adsorption amount of
superplasticizer on cement and the zeta potential on the surface of each cement particle was determined respectively. Moreover, the
structure characterization and performance of superplasticizer were investigated, the results showed that the green set-retarding
superplasticizer contained amino, hydroxyl, sulfonic acid, benzene, ether, and so on. The fluidity of cement paste could attain as high
as 265.5 mm when superplasticizer amount was 0. 5% of cement weight, and when added 0.5%6,0.7% and 0.9, water-reducing
ratio was 16.8%, 21.5% and 23 9 respectively. In addition, the compressive strength of mortar was increased first and then
decreased after curing for 3 d, 7 d and 28 d, and false condensate occurred when the content was greater than 0.7%. The process
has advantages of green and environmental protection and low cost, and moreover, the product is safe in use and has excellent
properties.
Key words: sucrose, p-aminobenzene sulfonic acid, efficient superplasticizer, green and environmental protection
0引言
能混凝土外加剂,其不但具有高效减水剂的高分散作用、高减
水率、坍落度经时损失小等效能,同时兼有降低水泥水化速
缓凝高效减水剂是一类兼具高效减水和缓凝效果的高性度、减缓水化放热、延长凝结时间等作用,有利于改善混凝土
的施工和应用性能。因此,缓凝高效减水剂特别适用于制各
基金项目:广西教育厅科研项目(KY2015YB170)资助
远距离配送的混凝土、高强低热混凝土、泵送商品混凝土等缓
广西糖资源绿色加工重点实验室、广西高校糖资源加工重凝型混凝土。目前,萘磺酸盐类缓凝高效减水剂是应用较为广
点实验室开放基金(2016 TZYKFO2)资助
泛的一类商品混凝土缓凝剂,但其不但存在原料来源受限、污
收稿日期:2016-06-21;修订日期:2016-11-29
染环境、施工不安全等不足,同时存在坍落度经时损失大、泌水
作者简介:李彦青,男,19832年生,河南商水人,博士研究生,助理研严重等问题,所以开发具有资源再生环保、绿色安全、性能优异
究员,从事混凝土外加剂开发与应用研究。E-mal:695322857qcom。的缓凝高效减水剂具有重要现实意义。
通信作者:孔红星,地址:广西柳州市东环大道268号,E-mail:khx100
蔗糖来源丰富、价格便宜、无毒,又是一种可再生的资
sina.como
源,是常用来延长混凝土凝结时间、实现新拌混凝土保塑性
NEW BUILDING MATERIALS 81
万方数据