Study on Carbon Fixation Efficiency of Concrete Carbon Fixation Technology

Abstract

Concrete emits a large amount of carbon dioxide during the production process, exacerbating environmental problems such as greenhouse effect. However, at the same time, the hydration products of concrete (Ca(OH)2, C-S-H, etc.) can react with CO2 and have great potential for carbon sequestration. At different stages of the life cycle of concrete (mixing, curing, service, and secondary utilization), concrete can achieve permanent CO2 sequestration through carbonation reactions. Whether concrete carbon sequestration technology can achieve carbon neutrality, the amount of carbon sequestration is the most important parameter, which directly determines whether various concrete carbon sequestration technologies have research value. Different concrete carbon sequestration technologies have significant differences in their carbon sequestration mechanisms and technical routes, resulting in varying amounts of carbon sequestration. This article summarizes the current research status of carbon sequestration technology in different stages of concrete, analyzes and compares its carbon sequestration efficiency, and predicts its development potential and application prospects.