综合精品_淫语对白_亚洲一线二线在线观看_自偷自拍av_女m被主人虐玩调教91_青草精品视频_一乃葵在线_村上里沙在线观看_国产精品刺激_日韩精品视频免费_国产又黄又猛又粗_3d蒂法精品啪啪一区二区免费_日韩一本在线_奇米精品一区二区三区四区_日本三级黄色录像

PDF全文閱讀

李崇智¹ ,  王琬怡¹ ,  梁志勇² ,  談 珽² ,  彭家蔓¹ ,  王    坤¹ ,  任強偉¹

( 1 .  北京建筑大學 土木與交通工程學院 ，北京 100044 ;  2.  廣西寶添環保材料有限公司 ，南寧 530001)

摘   要 ：為加強對花崗巖石粉高效利用和環境可持續發展的重視，研究花崗巖石粉對礦粉－粉煤灰復合水 泥漿體及其制備的 C30 與 C50 混凝土性能的影響。結果表明，將花崗巖石粉內摻到 1 ∶1 礦粉和粉煤灰中，內摻10% 時水泥漿體流動度最大，內摻超過 30% 時漿體的流動度急劇下降 ；對 28 d 水泥膠砂抗壓強度的影響在內摻 30% 時達到最優，對抗折強度影響相對較小；內摻 15% 的花崗巖石粉復合摻合料應用于 C30 和 C50 混凝土，新 拌混凝土工作性能良好，無離析泌水現象，混凝土表面平整，28 d 抗壓強度分別提升至 36. 7 和 56. 8 MPa;  碳化 深度試驗表明，適量的花崗巖石粉能夠有效提升混凝土的抗碳化性能。

關鍵詞：花崗巖石粉 ；復合摻合料 ；混凝土

中圖分類號：TU528           

文獻標志碼：A            

文章編號： 1005- 8249  (2025)  01- 0024- 05 

DOI:10. 19860/j.cnki.issn1005 - 8249.2025 .01 .005

 

LI Chongzhi ¹  ,  WANG Wanyi ¹  ,  LIANG Zhiyong² ,  TAN Ting² ,  PENG Jiaman¹  ,  WANG Kun¹  ,  REN Qiangwei ¹

( 1 . School of Civil and Transportation Engineering ,   Beijing University of Civil Engineering and

Architecture ,  Beijing 100044 ,  China;  2. Guangxi  Baotian Environmental Protection  Materials

Co. ，Ltd. ，Nanning 530001 ,   China)

Abstract: To enhance the emphasis on the efficient utilization of granite powder and sustainable environmental development, the study explores the impact of granite powder on the properties of composite cement slurry consisting of mineral powder and fly ash, as well as the performance of the resulting C30 and C50 concrete.The results show that when the granite powder is mixed into 1:1 mineral powder and fly ash, the fluidity of cement slurry reaches the maximum when the granite powder is mixed with 10%, and the fluidity of slurry decreases rapidly when the granite powder is mixed with more than 30%. The influence on compressive strength of 28 d cement mortar is the largest when 30% is added, and the influence on flexural strength is relatively small.When the composite admixture of 15% granite powder is applied to C30 and C50 concrete, the newly mixed concrete has good workability, no segregation and bleeding problem, the appearance of concrete is smooth, and the 28 d compressive strength increased to 36.7 MPa and 56.8 MPa. The carbonation depth test shows that an appropriate amount of granite powder can effectively improve the carbonation resistance of concrete.

Key words: granite powder, compound admixture, concrete

作者簡介：李崇智  (1969—) ,  男 ，博士，教授 、碩導 ，研究方向：混凝土外加劑和礦物摻合料的研制與應用。

通信作者： 王琬怡  (1999—) ,  女 ，碩士研究生 ，研究方向： 固廢基膠凝材料道路混凝土和鎂水泥固化土。

收稿日期：2023 - 09 - 09