CO2矿化养护全固废碱激发胶凝材料固碳特性及性能强化
摘要：采用全固废碱激发胶凝材料固定CO2不仅可以实现CO2矿化封存，还能缩短碱激发胶凝材料养护周期，并同时提升其抗压强度，是一种极具发展和工业化应用前景的CO2捕集与利用方式。以全固废碱激发胶凝材料为对象，研究了碱激发胶凝材料配比、矿化养护压力和矿化养护时间对其CO2矿化养护过程的固碳率和抗压强度的影响。结果表明，电石渣作碱激发剂更适用于矿化养护，且在相同的养护工况下，钙硅比最高试件具有最佳的固碳能力，提高CO2矿化养护压力和增加养护时长均能改善试样的性能。理化表征测试结果表明，与自然养护相比，矿化养护样品的微观结构更为致密，且养护过程中生成的大量方解石型碳酸钙有助于提高碱激发材料的抗压强度。研究结果为全固废碱激发胶凝材料CO2矿化养护技术发展提供了基础数据和参考。
Abstract:CO2 mineralized all-solid waste alkali-activated cementitious materials can not only realize the storage of CO2 mineralized, but also shorten the curing cycle of alkali-activated cementitious materials and improve their compressive strength. It is a promising way of CO2 capture and utilization. The effects of the ratio of alkali-activated cementitious materials, mineralized curing pressure and mineralized curing time on the carbon fixation rate and compressive strength of CO2 mineralized cementitious materials were studied. The results show that the calcium carbide slag as alkali activator is more suitable for mineralization curing, and the sample with the highest Ca/Si ratio has the best carbon fixation ability under the same curing condition. Increasing the curing pressure and curing time of CO2 can improve the properties of the samples. Physical and chemical characterization test results show that, the microstructure of the mineralized samples is more compact than that of the natural curing samples, and the calcite-type calcium carbonate produced in the curing process is helpful to increase the compressive strength of the material. The research results provide basic data and reference for the development of CO2 mineralization curing technology of all-solid waste alkali-activated cementitious materials.
标题：CO2矿化养护全固废碱激发胶凝材料固碳特性及性能强化
title:Carbon Fixation Characteristics and Performance Enhancement of CO2 Mineralized All-solid Waste Alkali-activated Cementitious Materials
作者：孔啸, 赵传文, 孙健, 郭亚飞, 潘越, 卢平
authors:Xiao KONG, Chuanwen ZHAO, Jian SUN, Yafei GUO, Yue PAN, Ping LU
关键词：碳捕集、利用、封存(CCUS),碱激发胶凝材料,矿化养护,电石渣,CO2封存,
keywords:carbon capture, utilization and storage (CCUS),alkali-activated cementitious materials,mineralization curing,carbide slag,CO2 storage,
发表日期：2022-08-31
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