[1]李国新,郭 艳,史 琛,等.缓凝剂对水泥单矿物吸附萘系高效减水剂的影响[J].西安建筑科技大学学报:自然科学版,2014,46(03):428-431.[doi:10.15986/j.1006-7930.2014.03.022]
　LI Guoxin,GUO Yan,SHI Chen,et al.Influence of retarder on the adsorptive capacity of -Naphthalenelfonic acid-based superplasticizer on cement mineral particles[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2014,46(03):428-431.[doi:10.15986/j.1006-7930.2014.03.022]
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缓凝剂对水泥单矿物吸附萘系高效减水剂的影响()
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西安建筑科技大学学报:自然科学版[ISSN:1006-7930/CN:61-1295/TU]

卷:
46
期数:
2014年03期
页码:
428-431
栏目:
出版日期:
2014-06-30

文章信息/Info

Title:
Influence of retarder on the adsorptive capacity of -Naphthalenelfonic acid-based superplasticizer on cement mineral particles
文章编号:
1006-7930(2014)03-0428-04
作者:
李国新; 郭 艳; 史 琛; 郭艳艳
(西安建筑科技大学材料与矿资学院,陕西 西安 710055)
Author(s):
LI Guoxin;  GUO Yan;  SHI Chen;  GUO Yanyan
(School of Materials and Mineral Resources, Xi’an University of Architecture & Technology, Xi’an 710055, China)
关键词:
高效减水剂; 缓凝剂; 水泥矿物; 吸附量; Zeta电位
Keywords:
superplasticizer;  retarder;  cement mineral;  adsorptive capacity;  zeta potential
分类号:
TU528.042.2
DOI:
10.15986/j.1006-7930.2014.03.022
文献标志码:
A
摘要:
研究了柠檬酸(CA)和葡萄糖酸钠(SG)2 种缓凝剂对 C3A-CaSO4·2H2O 、C4AF- CaSO4·2H2O 及C3S水泥单矿物浆体吸附萘系高效减水剂(BNS)的影响.对上述浆体分别测试了对BNS 的吸附量和各浆体的Zeta-电位,对C3A-CaSO4·2H2O 浆体进行了X-衍射分析(XRD)和热重分析(TGA).结果表明:当缓凝剂CA、SG 与BNS 同时掺入到上述浆体时,随CA、SG 掺量增大,C4AF-CaSO4·2H2O 和C3S 吸附BNS 的量降低,这是源于缓凝剂和BNS 在这些矿物上的竞争吸附;而C3A-CaSO4·2H2O 吸附BNS 的量却增大,XRD和TGA 测试结果表明CA 大幅度地促进了带正电的钙矾石生成,导致对BNS 的吸附量增大,而SG 的该作用效果较CA 弱.
Abstract:
The influence of two types of retarder citric acid (CA) and sodium gluconate (SG) on the adsorptive capacity of β- Naphthalenelfonic acid-based superplasticizer on the C3A-CaSO4·2H2O, C4AF-CaSO4·2H2O and C3S cement mineral particles were used for research. The amount of BNS adsorption on the cement mineral particles and the Zeta potential of the pastes were studied, and X- ray diffraction (XRD) and thermal gravimetric analysis (TGA) for C3A-CaSO4·2H2O paste were tested. The results show that the amount of BNS adsorption on the C4AF-CaSO4·2H2O and C3S decreased as CA, SG content increased while the retarder CA, SG and BNS were incorporated into the paste. This is because the retarder and BNS has competitive adsorption on these minerals. Conversely, the amount of BNS adsorption on the C3A-CaSO4·2H2O increased. The XRD and TGA test results show that CA promoted the ettringite formation with positive charges significantly, which caused the adsorption amount of BNS increase, while the effect of SG is weaker than CA.

参考文献/References:

[1] YOSHIOKA K, TAZAWA E, KAWAI K, et al. Adsorption characteristics of superplasticizers on cement component minerals [J]. Cement Concrete Research, 2002, 32 (10): 1507-1513.

[2] Tingshu H, Fuqiang S, Fuchuan W, et al. Influences of combination of superplasticizers and retardens on process of cement hydration [J]. Journal of the Chinese Ceramic Society, 2007 ,35(6): 796-800.

[3] YOSHIOKA K, TAZAWA E, KAWAI K, et al. Adsorption characteristics of superplasticizers on cement component minerals [J]. Cement Concrete Research, 2002, 32(10): 1507-1513.

[4] PLANK J, WINTER Ch. Competitive adsorption between superplasticizer and retarder molecules on mineral binder surface [J]. Cement Concrete Research, 2008, 38(5): 599-605.

[5] PRINCE W, EDWARDS-LAJNEF M, AITCIN P.-C. Interaction between ettringite and a polynaphthalene sulfonate superplasticizer in a cementitious paste [J]. Cement Concrete Research, 2002, 32(1): 79-85.

[6] PRINCE W, ESPAGNE M., Aitcin P-C. Ettringite formation: A crucial step in cement superplasticizer compatibility[J] . Cement Concrete Research, 2003, 33(5): 635-641.

[7] PLANK Johann, HIRSCH Christian. Impact of zeta potential of early cement hydration phases on superplasticizer adsorption [J]. Cement and Concrete Research, 2007, 37(1):538-539.

相似文献/References:

[1]李国新,郭 艳,史 琛,等.高效减水剂与缓凝剂复掺对三元胶凝体系流动性和强度的影响[J].西安建筑科技大学学报:自然科学版,2014,46(06):898.[doi:10.15986/j.1006-7930.2014.06.024]
　LI Guoxin,GUO Yan,SHEN Chen,et al.Effects of -naphthalenelfonicacid-based superplasticizer and retarder on the fluidity and strength of the ternary cementitious system[J].J.Xi’an Univ. of Arch. & Tech.:Natural Science Edition,2014,46(03):898.[doi:10.15986/j.1006-7930.2014.06.024]

备注/Memo

备注/Memo:
收稿日期:2013-11-19 修改稿日期:2014-05-28
基金项目:教育部科学技术研究重点项目(210220);陕西省自然科学基础研究计划项目(2014JQ7251);西安建筑科技大学人才科技基金(DB09059);西安建筑科技大学材料与矿资学院青年博士基金
作者简介:李国新(1975-),男,博士,副教授.主要从事高强高性能混凝土方面的研究.E-mail: liguoxin @xauat.edu.cn
更新日期/Last Update: 2015-09-01