发电技术 ›› 2022, Vol. 43 ›› Issue (4): 600-608.DOI: 10.12096/j.2096-4528.pgt.22084
孔啸, 赵传文, 孙健, 郭亚飞, 潘越, 卢平
收稿日期:
2022-04-21
出版日期:
2022-08-31
发布日期:
2022-09-06
作者简介:
基金资助:
Xiao KONG, Chuanwen ZHAO, Jian SUN, Yafei GUO, Yue PAN, Ping LU
Received:
2022-04-21
Published:
2022-08-31
Online:
2022-09-06
Supported by:
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。
中图分类号:
孔啸, 赵传文, 孙健, 郭亚飞, 潘越, 卢平. CO2矿化养护全固废碱激发胶凝材料固碳特性及性能强化[J]. 发电技术, 2022, 43(4): 600-608.
Xiao KONG, Chuanwen ZHAO, Jian SUN, Yafei GUO, Yue PAN, Ping LU. Carbon Fixation Characteristics and Performance Enhancement of CO2 Mineralized All-solid Waste Alkali-activated Cementitious Materials[J]. Power Generation Technology, 2022, 43(4): 600-608.
样品名称 | 各成分质量分数/% | ||||||||
---|---|---|---|---|---|---|---|---|---|
CaO | SO3 | MgO | P2O5 | Fe2O3 | SiO2 | Al2O3 | LOI | 其他 | |
脱硫渣 | 73.28 | 5.00 | 2.38 | 0.013 | 0.74 | 0.80 | 0.27 | 19.05 | 7.54 |
电石渣 | 70.58 | — | 0.98 | — | — | 2.45 | — | 23.37 | 2.05 |
矿渣 | 39.53 | 0.05 | 10.42 | — | 0.01 | 30.41 | 15.06 | 0.01 | 4.50 |
粉煤灰 | 6.23 | 1.38 | — | — | 11.60 | 45.87 | 22.97 | 5.78 | 6.71 |
钢渣 | 33.68 | — | 5.85 | 1.540 | 30.09 | 14.41 | 3.71 | 2.59 | 4.83 |
表1 原料主要化学成分
Tab.1 Chemical composition of raw materials
样品名称 | 各成分质量分数/% | ||||||||
---|---|---|---|---|---|---|---|---|---|
CaO | SO3 | MgO | P2O5 | Fe2O3 | SiO2 | Al2O3 | LOI | 其他 | |
脱硫渣 | 73.28 | 5.00 | 2.38 | 0.013 | 0.74 | 0.80 | 0.27 | 19.05 | 7.54 |
电石渣 | 70.58 | — | 0.98 | — | — | 2.45 | — | 23.37 | 2.05 |
矿渣 | 39.53 | 0.05 | 10.42 | — | 0.01 | 30.41 | 15.06 | 0.01 | 4.50 |
粉煤灰 | 6.23 | 1.38 | — | — | 11.60 | 45.87 | 22.97 | 5.78 | 6.71 |
钢渣 | 33.68 | — | 5.85 | 1.540 | 30.09 | 14.41 | 3.71 | 2.59 | 4.83 |
试块 | 激发剂种类 | 碱激发剂质量/kg | 矿渣质量/kg | 粉煤灰质量/kg | 河砂质量/kg | 钢渣质量/kg | 水胶比 | 钙硅比 |
---|---|---|---|---|---|---|---|---|
DS-1 | 脱硫渣 | 3.6 | 3 | 0.6 | 1.2 | 3.6 | 0.50 | 2.28 |
CS-1 | 电石渣 | 3.2 | 3 | 0.6 | 1.2 | 4.0 | 0.50 | 2.08 |
CS-2 | 电石渣 | 3.6 | 3 | 0.6 | 1.2 | 3.6 | 0.50 | 2.18 |
CS-3 | 电石渣 | 4.2 | 3 | 0.6 | 1.2 | 3.0 | 0.50 | 2.35 |
表2 碱激发胶凝材料配比
Tab. 2 Ingredients for alkali-activated cementitious materials
试块 | 激发剂种类 | 碱激发剂质量/kg | 矿渣质量/kg | 粉煤灰质量/kg | 河砂质量/kg | 钢渣质量/kg | 水胶比 | 钙硅比 |
---|---|---|---|---|---|---|---|---|
DS-1 | 脱硫渣 | 3.6 | 3 | 0.6 | 1.2 | 3.6 | 0.50 | 2.28 |
CS-1 | 电石渣 | 3.2 | 3 | 0.6 | 1.2 | 4.0 | 0.50 | 2.08 |
CS-2 | 电石渣 | 3.6 | 3 | 0.6 | 1.2 | 3.6 | 0.50 | 2.18 |
CS-3 | 电石渣 | 4.2 | 3 | 0.6 | 1.2 | 3.0 | 0.50 | 2.35 |
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