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| 添加外加剂的水泥粉煤灰基层结合料性能研究 | |
| 引用本文： | 李懿,王连俊,陈明哲,李培君.添加外加剂的水泥粉煤灰基层结合料性能研究[J].重庆交通大学学报(自然科学版),2011,30(4):768-772,859. |
| 作者姓名： | 李懿 王连俊 陈明哲 李培君 |
| 作者单位： | 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,221000 |
| 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... |
| 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 |
Performance of Cement and Fly Ash Base Course Binder with Chemical Activator |
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| LI Yi,WANG Lian-jun,CHEN Ming-zhe,LI Pei-jun.Performance of Cement and Fly Ash Base Course Binder with Chemical Activator[J].Journal of Chongqing Jiaotong University,2011,30(4):768-772,859. | |
| Authors: | LI Yi WANG Lian-jun CHEN Ming-zhe LI Pei-jun |
| Affiliation: | 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) |
| Abstract: | When the proportion of cement and fly is 1:2,the external addition method and dosage of N-type activator and U-type 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. |
| Keywords: | chemical activator binder of cement and fly ash hydration mechanism mechanical properties microstructure |
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