CO₂流通法养护透水混凝土的性能与作用机理

为了更好地利用透水混凝土的多孔特性，提出并设计了一种新型的流通法养护装置，旨在探索更适合透水混凝土的CO2养护方法。通过实验探讨了流通法养护时间这一关键参数，并与传统的静态养护方法（包括加压和常压养护）进行了对比，特别是在固碳率、抗压强度和微观结构等方面的性能表现。结果表明，流通法能够通过气流带走透水混凝土内部多余的水分，从而实现水分的均匀分布，同时还能减少预处理步骤并促进碳酸化。这有效地消除了试件内外的碳化不均匀性，显著提升了混凝土的抗压强度。

In order to better utilize the porous characteristics of pervious concrete and find a more suitable CO2 curing method for it, this study proposed a novel fluid method for curing pervious concrete and designed a corresponding curing apparatus. Experimental approaches were used to explore the curing time and other parameters of the flow-through method, and a comparison was made with commonly used static curing methods. This included pressure curing, which shows superior performance, and atmospheric curing under similar conditions, focusing on CO2 uptake, compressive strength, and microstructure. The study found that the fluid method can promote carbonation by removing excess moisture, especially from the interior of the concrete, through airflow, reducing the need for pre-treatment steps and ensuring a more uniform distribution of moisture. This effectively eliminated the uneven carbonation inside and outside the specimens, significantly improving the concrete's compressive strength. This finding is crucial for enhancing the overall performance of the concrete and reducing energy consumption. This research provides important guidance for improving the curing methods of pervious concrete products.