铜镍矿渣复合胶凝材料的碱激发

Alkali Activation of Copper and Nickel Slag Composite Cementitious Materials.

作者信息

Zhang Tingting, Zhi Shiwei, Li Tong, Zhou Ziyu, Li Min, Han Junnan, Li Wenchen, Zhang Dan, Guo Lijie, Wu Zhenlin

机构信息

Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116023, China.

National Centre for International Research on Green Metal Mining, BGRIMM Technology Group, Beijing 102628, China.

出版信息

Materials (Basel). 2020 Mar 5;13(5):1155. doi: 10.3390/ma13051155.

DOI:10.3390/ma13051155

PMID:32150952

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7084995/

Abstract

Alkali-activated copper and nickel slag cementitious materials (ACNCMs) are composite cementitious materials with CNS (copper and nickel slag) as the main materials and GGBFS (ground-granulated blast-furnace slag) as a mineral admixture. In this paper, the activity indexes of CNS with different grinding times were studied using CNS to replace a portion of cement. NaOH, NaSO, and NaSiO activators were used to study the alkaline solution of the CNS glass phase. The effects of the fineness of CNS and the type of activator on the hydration of ACNCMs were investigated via physical/mechanical grinding and chemical activation. The hydration products of ACNCMs were analyzed via XRD, SEM, FT-IR, TG, and MIP. The results of the study revealed that the activity indexes of CNS ground with different grinding times (10, 30 and 50 min) were 0.662, 0.689, and 0.703, respectively. When NaSiO was used as the activator, the glass phase dissolved the most Si, Al, and Ca, and the respective concentrations in the solution were found to be 2419, 39.55, and 3.38 mg/L. Additionally, the hydration products of ACNCMs were found to have a 28-day compressive strength of up to 84 MPa.

摘要

碱激发铜镍渣胶凝材料（ACNCMs）是以铜镍渣（CNS）为主要原料、粒化高炉矿渣（GGBFS）为矿物掺合料的复合胶凝材料。本文采用CNS替代部分水泥，研究了不同粉磨时间下CNS的活性指数。使用NaOH、NaSO和NaSiO活化剂研究CNS玻璃相的碱性溶液。通过物理/机械粉磨和化学活化，研究了CNS的细度和活化剂类型对ACNCMs水化的影响。通过XRD、SEM、FT-IR、TG和MIP对ACNCMs的水化产物进行了分析。研究结果表明，不同粉磨时间（10、30和50分钟）粉磨的CNS的活性指数分别为0.662、0.689和0.703。当使用NaSiO作为活化剂时，玻璃相溶解的Si、Al和Ca最多，溶液中各自的浓度分别为2419、39.55和3.38mg/L。此外，ACNCMs的水化产物28天抗压强度高达84MPa。