Scholarlink

<p>Low-carbon production of building materials as the core path of the “dual-carbon” goal, its important technological breakthrough lies in the maintenance of cementitious material properties through the replacement of cement by mineral admixtures to synchronize the realization of carbon emission reduction and ecological benefits win-win. In this paper, composite cementitious materials (CCM) were prepared using vanadium–titanium iron ore tailings (VTIOTs), and the effects of VTIOTs fineness, content and ion dissolution on the performance of CCM were investigated, the composition, structure and hydration mechanism of CCM hydration products were analyzed, and carbon emission calculation method and carbon reduction effect of CCM were evaluated. The results showed that the 28 d activity index of VTIOTs reached 69.4% when mechanical activation for 50&#xa0;min. When the CCM mix ratio of VTIOTs: cement: silica fume (SF) is 2:7:1, the 28 d compressive strength was 39.7&#xa0;MPa. The CCM with 30% VTIOTs could reduce the total exothermic heat of hydration by 27.01%. The hydration products of CCM were mainly C-S-H, calcium aluminate hydrate (C<sub>3</sub>AH<sub>6</sub>), ettringite (AFt) and some amorphous substances. It is recommended to use A<sub>2</sub> mix ratio, which reduces carbon emission by about 30% compared to cement, and ensures the mechanical properties of CCM with environmental benefits and achieve clean production of cement-based materials.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Properties, carbon emission calculation method and carbon reduction effect evaluation on composite cementitious materials containing vanadium–titanium iron ore tailings

  • 期刊论文

  • 发表日期：

    2026年1月30日

查看全文
  • Changlong Wang,
  • Yunyi Bai,
  • Kaifan Zhang,
  • Yafeng Rui,
  • Xiaoping Tian,
  • Shifan Wang,
  • Ye Zhang,
  • Zengzhi Qian,
  • Yuxin Zhai,
  • Feng Liu,
  • Minjiang Hao,
  • Yang Lu,
  • Zhonghao Li

摘要

Low-carbon production of building materials as the core path of the “dual-carbon” goal, its important technological breakthrough lies in the maintenance of cementitious material properties through the replacement of cement by mineral admixtures to synchronize the realization of carbon emission reduction and ecological benefits win-win. In this paper, composite cementitious materials (CCM) were prepared using vanadium–titanium iron ore tailings (VTIOTs), and the effects of VTIOTs fineness, content and ion dissolution on the performance of CCM were investigated, the composition, structure and hydration mechanism of CCM hydration products were analyzed, and carbon emission calculation method and carbon reduction effect of CCM were evaluated. The results showed that the 28 d activity index of VTIOTs reached 69.4% when mechanical activation for 50 min. When the CCM mix ratio of VTIOTs: cement: silica fume (SF) is 2:7:1, the 28 d compressive strength was 39.7 MPa. The CCM with 30% VTIOTs could reduce the total exothermic heat of hydration by 27.01%. The hydration products of CCM were mainly C-S-H, calcium aluminate hydrate (C3AH6), ettringite (AFt) and some amorphous substances. It is recommended to use A2 mix ratio, which reduces carbon emission by about 30% compared to cement, and ensures the mechanical properties of CCM with environmental benefits and achieve clean production of cement-based materials.