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徐俊鵬¹  ,  趙天奇¹  ,  趙    睿¹  ,  韓    春¹  ,  梁   鵬¹  ,  趙輝川¹  ,   張維國²

( 1 .  中國二十二冶集團有限公司 ，唐山 064000 ;    2.  武夷學院 土木工程與建筑學院 ，武夷山 354300)

摘   要 ：為了對高溫蒸養條件下的大摻量工業固廢混凝土性能變化有進一步的了解，采用宏觀試驗\X 射 線衍射  (XRD)、和掃描電子顯微鏡 (SEM) 相結合的方法對粉煤灰超量取代法制備的 C30 混凝土性能和增強機理進行了研究分析。結果表明：粉煤灰超量單摻時，在取代率為 20% , 超量系數為 1 . 6 時，脫模強度達到最大 20. 8 MPa,  在取代率為 25% , 超量系數為 1 . 4 時，28  d 強度達到最大42. 8 MPa。在粉煤灰取代率和超量系數分 別為 25% 和 1 . 6 ,  硅灰內摻 5% 時 ，雙摻硅灰和粉煤灰的成本及強度等綜合性能達到最佳， 同時外加劑用量也僅 為 1 . 3% 。在微觀定性與定量分析中，雙摻硅灰和粉煤灰的 CH 含量最少 ，膠凝性水化產物 C - S - H 的衍射強度

最好，微觀結構也更加致密。

關鍵詞：土木工程 ；高溫蒸養 ；超量取代法 ；宏觀力學 ；增強機理

中圖分類號：TU528 . 1            

文獻標志碼：A            

文章編號： 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

作者簡介：徐俊鵬  (1991 —) , 男，博士研究生，工程師，研究方向：多元固廢混凝土。

收稿日期：2024 - 1 1 - 04