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徐俊鹏¹  ,  赵天奇¹  ,  赵    睿¹  ,  韩    春¹  ,  梁   鹏¹  ,  赵辉川¹  ,   张维国²

( 1 .  中国二十二冶集团有限公司 ，唐山 064000 ;    2.  武夷学院 土木工程与建筑学院 ，武夷山 354300)

摘   要 ：为了对高温蒸养条件下的大掺量工业固废混凝土性能变化有进一步的了解，采用宏观试验\X 射 线衍射  (XRD)、和扫描电子显微镜 (SEM) 相结合的方法对粉煤灰超量取代法制备的 C30 混凝土性能和增强机理进行了研究分析。结果表明：粉煤灰超量单掺时，在取代率为 20% , 超量系数为 1 . 6 时，脱模强度达到最大 20. 8 MPa,  在取代率为 25% , 超量系数为 1 . 4 时，28  d 强度达到最大42. 8 MPa。在粉煤灰取代率和超量系数分 别为 25% 和 1 . 6 ,  硅灰内掺 5% 时 ，双掺硅灰和粉煤灰的成本及强度等综合性能达到最佳， 同时外加剂用量也仅 为 1 . 3% 。在微观定性与定量分析中，双掺硅灰和粉煤灰的 CH 含量最少 ，胶凝性水化产物 C - S - H 的衍射强度

最好，微观结构也更加致密。

关键词：土木工程 ；高温蒸养 ；超量取代法 ；宏观力学 ；增强机理

中图分类号：TU528 . 1            

文献标志码：A            

文章编号： 1005- 8249  (2025)  01- 0049- 06 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .01 .010

 

XU Junpeng¹  ,  ZHAO Tianqi ¹  ,  ZHAO Rui ¹  ,  HAN Chun¹  ,  LIANG Peng¹  , ZHAO Huichuan¹  ,  ZHANG Weiguo²

( 1 . China MCC22 Group Co. ，Ltd. ，Tangshan 064000 ,  China;  2. School  of Civil

Engineering and Architecture ,  Wuyi University ,  Wuyishan 354300 ,  China)

Abstract: In order to further understand the performance changes of high content industrial solid waste concrete under high-temperature steam curing conditions. The study used a combination of macroscopic experiments, X-ray diffraction (XRD), and scanning electron microscopy (SEM) to investigate and analyze the properties and reinforcement mechanism of C30 concrete prepared by fly ash over substitution method. It was found that when fly ash was excessively added, the demolding strength reached a maximum of 20.8MPa at a substitution rate of 20% and an excess coefficient of 1.6. At a substitution rate of 25% and an excess coefficient of 1.4, the maximum strength of 42.8MPa was achieved at 28 days. When the substitution rate of fly ash is 25%, the excess coefficient is 1.6, and 5% of silica fume is added, the comprehensive performance of cost and strength of double blended silica fume and fly ash reaches the best, and the minimum amount of admixture is only 1.3%. In micro qualitative and quantitative analysis, the CH content of double doped silica fume and fly ash is the lowest, the diffraction intensity of cementitious hydration product C-S-H is the best, and the microstructure is also denser.

Key words: civil engineering; high temperature steam curing; excess substitution method; macromechanics; enhancement mechanism

作者简介：徐俊鹏  (1991 —) , 男，博士研究生，工程师，研究方向：多元固废混凝土。

收稿日期：2024 - 1 1 - 04