Development of a Large-scale Thermogravimetry and Gas Analyzer for Determining Carbon in Concrete

IF 1.6 4区 工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY Journal of Advanced Concrete Technology Pub Date : 2024-06-24 DOI:10.3151/jact.22.383
Ippei Maruyama, Koichiro Noritake, Yoshinobu Hosoi, Haruka Takahashi
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Abstract

One carbon neutralization measure applied in the concrete sector is the use of artificial carbonate in concrete for immobilization. This CO2 reduction technology corresponds to the CO2 emitted during concrete production. When considering the marketability of these technologies, especially for newly developed products in the carbon market, it is essential to quantify the amount of CO2 fixed as inorganic carbonate. Additionally, as a representative test specimen for concrete containing aggregate, a φ100 × 200 mm cylinder specimen is conventionally used for physical property evaluation. To evaluate the amount of CO2 fixed in one batch of concrete, a mass far from that of the conventional chemical analysis sample may need to be analyzed. Therefore, in this study, we investigated a pulverization process for concrete analytical materials. We also propose a new analytical apparatus that can be used to measure large cylinder specimens. Experimental results showed that the newly developed analyzer, equipped with a mass balance and CO2 and H2O gas analyzer for large cylinders, exhibited excellent analytical variability and measurement speed performance. It was also inferred that the homogenization process is necessary to grind the entire cylindrical concrete specimen into a fine powder and homogenize it to improve the representativeness of the concrete.

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开发用于测定混凝土中碳含量的大型热重仪和气体分析仪
混凝土行业采用的一种碳中和措施是在混凝土中使用人工碳酸盐进行固定。这种二氧化碳减排技术与混凝土生产过程中排放的二氧化碳相对应。在考虑这些技术的可销售性时,尤其是碳市场上新开发的产品,必须量化以无机碳酸盐形式固定的二氧化碳量。此外,作为含骨料混凝土的代表性试样,φ100 × 200 毫米的圆柱体试样通常用于物理性质评估。要评估一批混凝土中固定的二氧化碳量,可能需要分析与传统化学分析样本质量相差甚远的质量。因此,在本研究中,我们对混凝土分析材料的粉碎过程进行了研究。我们还提出了一种可用于测量大型圆柱体试样的新型分析仪器。实验结果表明,新开发的分析仪配备了质量平衡和用于大型圆柱体的 CO2 和 H2O 气体分析仪,在分析变异性和测量速度方面表现出色。此外,还推断出匀质过程是将整个圆柱形混凝土试样研磨成细粉并进行匀质处理以提高混凝土代表性的必要过程。
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来源期刊
Journal of Advanced Concrete Technology
Journal of Advanced Concrete Technology 工程技术-材料科学:综合
CiteScore
3.70
自引率
10.00%
发文量
45
审稿时长
3.5 months
期刊介绍: JACT is fast. Only 5 to 7 months from submission to publishing thanks to electronic file exchange between you, the reviewers and the editors. JACT is high quality. Peer-reviewed by internationally renowned experts who return review comments to ensure the highest possible quality. JACT is transparent. The status of your manuscript from submission to publishing can be viewed on our website, greatly reducing the frustration of being kept in the dark, possibly for over a year in the case of some journals. JACT is cost-effective. Submission and subscription are free of charge . Full-text PDF files are available for the authors to open at their web sites. Scope: *Materials: -Material properties -Fresh concrete -Hardened concrete -High performance concrete -Development of new materials -Fiber reinforcement *Maintenance and Rehabilitation: -Durability and repair -Strengthening/Rehabilitation -LCC for concrete structures -Environmant conscious materials *Structures: -Design and construction of RC and PC Structures -Seismic design -Safety against environmental disasters -Failure mechanism and non-linear analysis/modeling -Composite and mixed structures *Other: -Monitoring -Aesthetics of concrete structures -Other concrete related topics
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