Concrete structure repairing method based on carbonization hardening: Fid-Bau Portal

Concrete structure repairing method based on carbonization hardening

WANG FAZHOU / ZHANG XIUZHEN / LIU ZHICHAO / HE YONGJIA

The invention discloses a concrete structure repairing method based on carbonization hardening. The concrete structure repairing method comprises the following steps: cleaning an area that needs repairing; filling or smearing a repairing material, wherein the repairing material is prepared from the following components in parts by weight: 100 parts of a carbonized cementing material, 1 to 10 partsof a carbonization reinforcing agent, 5 to 70 parts of fine aggregate, 2 to 6 parts of a water reducing agent and 6 to 16 parts of water; sealing the to-be-repaired area by using a sealing device; and introducing carbon dioxide repairing gas into the closed to-be-repaired area. Based on a carbonization hardening principle, the repairing material is high in strength development speed and strengthgrade, and the repaired area can be quickly put into the service process. The volume of the repairing material can slightly expand in the carbonization process, the volume stability is excellent in the later service process, the repairing material is tightly combined with a matrix, the cohesiveness is high, and the falling phenomenon is not likely to occur. The fluidity of the repair slurry can bedesigned and regulated, the repair slurry is suitable for various processes such as smearing, spraying and irrigation, and the engineering applicability is high.

本发明公开了一种基于碳化硬化的混凝土结构修复方法，包括以下步骤：清理需要修复的区域；填充或涂抹修复材料；所述修复材料的成分按重量份数计算如下：碳化胶凝材料：100份，碳化增强剂：1‑10份，细骨料：5‑70份，减水剂：2‑6份，水：6‑16份；使用密封装置封闭待修复区域；向封闭的待修复区域通入二氧化碳修复气体。本发明基于碳化硬化原理，修复材料强度发展快，强度等级高，修复后能迅速投入服役过程；碳化过程中修补材料体积会产生微膨胀，且后期服役过程中体积稳定性优良，与基体结合紧密，粘结性强，不易出现脱落现象；修复浆体流动性可设计调控，满足涂抹、喷射、浇灌多种工艺，工程适用性强。

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