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http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/90205
標題: | 混凝土碳封存尺寸效應之研究 Study on Size Effect of Carbonation Capture of Concrete |
作者: | 陳彥輔 Yan-Fu Chen |
指導教授: | 詹穎雯 Yin-Wen Chan |
關鍵字: | 全球暖化,碳封存,二氧化碳養護,尺寸效應, global warning,carbon capture and storage,carbonation curing,size effect, |
出版年 : | 2023 |
學位: | 碩士 |
摘要: | 二氧化碳是主要的溫室氣體之一,對於全球氣候變化起著關鍵作用。全球二氧化碳排放量主要來自燃燒化石燃料(如煤炭、石油和天然氣)以及森林砍伐等人類活動。過去幾十年來,全球二氧化碳排放量一直在增加,導致溫室氣體濃度的升高。隨著全球氣候變化的風險越來越受到重視,許多國家和國際組織已開始採取行動來減少二氧化碳排放,以應對氣候變化,於此同時,因為混凝土中有許多成分能夠跟二氧化碳產生反應,許多學者也開始研究如何在不對混凝土性能造成負面影響的情況下將二氧化碳封存於混凝土,或許可以成為一個有潛力的碳封存方法。
本研究主要利用碳化養護的方式來封存二氧化碳,主要流程為先將齡期一天的水泥砂漿試體拆模後放入乾燥環境中,主要目的是將孔隙中水分散失,使二氧化碳得以進入試體進行反應,本研究將此步驟稱為預處理(Pre-conditioning),在完成預處理後,再將試體放入高壓的二氧化碳環境中進行碳化反應。為了探討試體尺寸大小對於碳化養護的影響,將設計不同的試體尺寸和不同的養護流程,藉由比較不同尺寸與碳化養護流程下的二氧化碳吸收量與抗壓強度,找出碳化養護對於二氧化碳吸收量與抗壓強度的尺寸效應,並同時找出最佳的碳化養護流程。 Carbon dioxide is one of the main greenhouse gases and plays a crucial role in global climate change. Global carbon dioxide emissions primarily come from human activities such as the burning of fossil fuels (such as coal, oil, and natural gas) and deforestation. Over the past few decades, global carbon dioxide emissions have been increasing, leading to a rise in greenhouse gas concentrations. As the risks of global climate change are increasingly recognized, many countries and international organizations have started taking action to reduce carbon dioxide emissions and address climate change. Meanwhile, because concrete contains many components that can react with carbon dioxide, researchers have also begun studying how to sequester carbon dioxide in concrete without negatively affecting its performance. This could potentially become a promising method for carbon storage. This study primarily utilizes carbonation curing to stores carbon dioxide. The main process involves demolding one-day-old cement mortar specimens and placing them in a dry environment to allow the dispersion of moisture in the pores, enabling carbon dioxide to enter the specimens for reaction. This step is referred to as pre-conditioning. After completing the pre-conditioning, the specimens are then placed in a high-pressure carbon dioxide environment for carbonation reaction. To investigate the influence of specimen size on carbonation curing, different specimen sizes and curing processes will be designed. By comparing the carbon dioxide absorption and compressive strength under different sizes and carbonation curing processes, the study aims to identify the size effect of carbonation curing on carbon dioxide absorption and compressive strength. Furthermore, the study aims to determine the optimal carbonation curing process. |
URI: | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/90205 |
DOI: | 10.6342/NTU202303348 |
全文授權: | 同意授權(全球公開) |
顯示於系所單位: | 土木工程學系 |
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