12.Optimization of Precast Concrete Component Joint Technology: Adapting to Current Modular Construction Needs and Global Standardization Trends

1. Current Technical Status
Prefabricated modular construction has become the mainstream upgrading direction of the global construction industry due to its advantages of high efficiency, low carbon and standardized production. At present, domestic precast buildings mainly adopt wet connection represented by grouting sleeves and dry connection represented by bolt assembly. In actual engineering applications, precast beam-column joints, wall panel joints and floor slab connection parts are always the structural weak links. Common problems include insufficient grouting compactness, inconsistent joint rigidity, poor overall seismic performance, and water seepage and cracking at node positions after long-term use, which affect the structural durability and building use function.

2. Key Optimization Measures
Aiming at the common defects of precast joints, targeted technical optimization is carried out from material upgrading and structural improvement. The improved high-precision grouting sleeve technology solves the problem of incomplete grouting and improves the bonding strength of steel bar connection. The UHPC post-cast joint reinforcement scheme replaces traditional ordinary concrete, effectively improving the crack resistance, compression resistance and durability of node areas. At the same time, optimize the joint waterproof structure and set up multi-channel waterproof and sealing layers to eliminate hidden dangers of water seepage in precast buildings. The optimized node system significantly improves the overall structural stability and seismic performance of modular buildings.

3. International Standard Development Trend
Global precast building construction is moving towards unified standardization and high assembly rate. European and American systems pay more attention to dry-type assembly and high-precision modular matching, while Southeast Asian and Middle Eastern markets focus on low-cost and high-seismic adaptive wet connection technology. In the future, the precast industry will gradually form unified international node design and construction standards, realizing the generalization of precast component sizes and standardized connection technologies. Multi-scenario adaptive node systems will become the core competitiveness of overseas precast engineering contracting.

4. Export Product Value
Supporting standardized grouting materials, special joint sealing concrete and UHPC node reinforcement materials can be formed into serialized export products. Combined with overseas regional engineering standards, customized precast node construction technical guidelines are formulated to provide one-stop solutions of product supply + technical standard docking + on-site guidance for overseas precast projects, helping domestic precast technologies and materials quickly occupy the global modular construction market.

Conclusion

Optimized precast joint technology effectively makes up for the structural and durability defects of traditional assembly nodes. By docking international construction standards and matching special supporting materials, it can meet the standardized and high-quality construction needs of global modular buildings, promoting the overseas popularization of precast concrete systems.