中文核心期刊
CSCD来源期刊
中国科技核心期刊
RCCSE中国核心学术期刊

重庆交通大学学报(自然科学版) ›› 2011, Vol. 30 ›› Issue (4): 768-772.DOI: 10.3969/j.issn.1674-0696.2011.04.015

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添加外加剂的水泥粉煤灰基层结合料性能研究

李懿1,王连俊1,陈明哲2,李培君3   

  1. 1. 北京交通大学土木建筑工程学院,北京100044; 2. 交通部公路科学研究院新桥公司,北京100088; 3. 徐州空军学院,江苏徐州22100
  • 收稿日期:2011-04-01 修回日期:2011-05-25 出版日期:2011-08-15 发布日期:2015-01-22
  • 作者简介:李懿(1982—),女,内蒙古包头人,博士研究生,主要从事路基工程、无机结合料稳定材料的研究。E-mail:liyi.825@163.com。

Performance of Cement and Fly Ash Base Course Binder with Chemical Activator

LI Yi1,WANG Lian-jun1,CHEN Ming-zhe2,LI Pei-jun3   

  1. 1. School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China; 2. Research Institute of Highway Ministry of Transport,Xinqiao Company,Beijing 100088,China; 3. Xuzhou Air Force College,Xuzhou 221000,Jiangsu,China
  • Received:2011-04-01 Revised:2011-05-25 Online:2011-08-15 Published:2015-01-22

摘要: 在水泥和粉煤灰配比为1∶ 2条件下,以无侧限抗压强度、劈裂强度、抗弯拉强度和弯拉模量为指标,研究N 型 激活剂和U 型膨胀剂的外掺形式和掺量; 采用SEM 观察掺化学外加剂水泥粉煤灰结合料的结构和形貌,分析其水 化机理。研究表明: N 型激活剂可以提高粉煤灰的活性,U 型膨胀剂可以有效提高结合料的抗裂性能; 外掺2% N 型激活剂、3%U 型膨胀剂的水泥粉煤灰稳定基层结合料具有较好的力学性能和抗裂性能。

关键词: 化学外加剂, 水泥粉煤灰结合料, 水化机理, 力学性能, 微观结构

Abstract: When the proportion of cement and fly is 1: 2,the external addition method and dosage of N-type activator and Utype expansion agent were studied by taking account of different indexes,such as unconfined compressive strength,cleavage strength,flexural tensile strength and flexural tensile modulus. The Structure and morphology of cement and fly ash binder were observed by means of SEM to analyze the hydration mechanism of the binder. The results show that N-type activator could significantly increase fly ash activity and U-type activator could improve crack resistance of mixture. The cement and fly ash stabilized base course binder with 2% N-type activator and 3% U-type activator have good mechanical properties and crack resistance.

Key words: chemical activator, binder of cement and fly ash, hydration mechanism, mechanical properties, microstructure

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