T/CCTAS 243-2025 Active Group standards

T/CCTAS 243-2025 Microbial Repair Technology Guide for Cracks in Concrete and Cement Concrete

Publish Date: 2025-08-04 Implement Date: 2025-10-01 For services related to genuine standard inquiry, procurement, translation, and other related services in China, please Contact Us

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Basic Information

Standard Code: T/CCTAS 243-2025

Standard Type: Group standards

Standard Status: Active

is_force_gb: no

CCS Name: -

ICS Name: Concrete structure

Publish Date: 2025-08-04

Implement Date: 2025-10-01

Scope

In order to enhance the durability of cement concrete structures, this document proposes a microbial-induced calcium carbonate mineralization repair technology. By immobilizing Bacillus on materials such as coral reef calcium sand, a repair slurry containing strains, culture medium, and calcium sources is prepared. A differentiated process is implemented for crack widths: for cracks ≤2mm, the surface is coated with the slurry and calcium sources are sprayed to form a gel layer; for cracks >2mm, the injection method is used for saturated filling. The repair effect is controlled by four indicators: crack width, calcium carbonate deposition, structural compactness, and bonding strength. This technology is suitable for the environmentally friendly and long-lasting repair of cracks in cement concrete structures of highway, railway, and urban road projects.