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曾志勇¹ , 马书山² , 杨淑娟² , 张    勇² , 杨    飞³

( 1. 台州学院 ，浙江 台州 318000;

2. 浙江理工大学先进纺织材料与制备技术教育部重点实验室 ，浙江 杭州 310018 ;

3. 浙江宇博新材料有限公司 ，浙江 台州 318000)

摘   要： 为提高建筑垃圾再生微粉的利用率，通过不同种类的发剂以及机械研磨处理来激发再生微粉的活性，制备水泥胶砂试体，以抗压强度、28 d 活性指数以及微观结构为评价依据，研究不同种类、不同掺量激发剂对再生微粉活性的激发效果。结果表明： 化学激发剂及机械球磨处理均可提高再生微粉的活性 ，在28 d 龄期时， 化学激发剂中 4%Na2 SO4 激发效果最好，4%CaCl2 的激发效果最差，机械球磨处理中，90 min 为最佳处理时间。从微观角度观察到再生微粉经过激发剂和机械球磨处理之后，其制成的胶砂试体结构变得更加平整和密实。

关键词： 再生微粉； 化学激发； 机械球磨； 活性指数

中图分类号： TU521. 2      

文献标志码： A      

文章编号： 1005-8249 (2023) 05-0043-08

DOI : 10. 19860/j.cnki.issn1005-8249.2023.05.007

ZENG Zhiyong ¹ , MA Shushan² , YANG Shujuan² , ZHANG Yong ² , YANG Fei³

( 1. Taizhou University , Taizhou 318000 , China;

2. Key Laboratory of Advanced Textile Materials and Manufacturing Technology Ministry of Education ,

Zhejiang Sci-Tech University , Hangzhou 310018 , China;

3. Zhejiang Yubo New Material Co. ，Ltd. ，Taizhou 318000 , China)

Abstract：In order to improve the utilization rate of recycled construction waste micronized powder, the activity of recycled micronized powder was stimulated by different kinds of excitants and mechanical grinding treatment, and cementitious sand specimens were prepared to study the stimulation effect of different kinds and dosing of excitants on the activity of recycled micronized powder based on compressive strength, 28d activity index and microstructure. The results showed that both chemical exciter and mechanical ball milling treatment could improve the activity of regenerated micronized powder, and at the age of 28d, 4% Na2SO4 in chemical exciter had the best excitation effect and 4% CaCl2 had the worst excitation effect, and 90 minutes in mechanical ball milling treatment was the best treatment time. From the microscopic point of view, it was observed that the structure of the colloidal specimens made of recycled micronized powder became more flat and dense after the treatment of exciter and mechanical ball milling.

Keywords：regenerated micronized powder; chemical excitation; mechanical ball milling; activity index

∗基金项目： 浙江省重点研发计划项目  (2021 C03160) 。

作者简介： 曾志勇  ( 1981 —) , 男 ，博士 ，讲师 ，主要从事 先进水泥基材料的制备与性能研究 、新型建材与环境材料的研发 工作。

收稿日期： 2022-08-08