Source: 丨Beijing Daily client
In Xiyuhe Village, Xibeiwang Town, located in the northwest of Haidian District, the construction of the North Courtyard of the Palace Museum (Bid Section 1), which was undertaken by Shanghai Baoye, is accelerating. The reporter recently learned that in the face of the industry problem of concrete cracks, Beijing Jinyu Concrete Company and Shanghai Baoye Innovation Studio joined hands to develop new concrete products for more than 180 days. After expert demonstration, this low-carbon and long-life self-healing concrete can achieve "crack self-healing", and strive to fully meet the requirements of the century-old design and use of the North Courtyard of the Forbidden City.
With the roar, more than 20 concrete tankers were ready to go, and the pump trucks stretched out their "long arms" to pour into the foundation pit of the restoration building project more than 20 meters deep. Gong Ruyuan from the Innovation Studio of Beijing Jinyu Concrete Company held a walkie-talkie, set his eyes on the pouring floor, and commanded and dispatched the pouring operation at any time.
"The flow and slump of the concrete are good!" Watching the concrete poured into the steel structure, he breathed a sigh of relief and pointed to the huge underground space: "In the future, large-scale cultural relics will be restored and displayed here, and our concrete must withstand all tests!" ”
Gong Ruyuan is responsible for the research and development of more than 10 kinds of special concrete involved in the project of the North Courtyard of the Palace Museum, one of which is the first low-carbon and long-life self-healing concrete technology in China, which was first used in the North Courtyard of the Forbidden City project, which can achieve the effect of no microcracks in the later stage.
"In layman's terms, we add some crystalline active materials to the concrete, and after there are cracks, chemical reactions can occur to form crystals, so as to fill the cracks, realize the self-healing of cracks, and improve the compactness and waterproof performance of concrete in the later stage." Gong Ruyuan said. Behind the seemingly simple principle is high-intensity research and development, the staff of the innovation studio carried out experimental research day and night, controlled from the three stages of cracks in concrete, designed the ratio and test mixing 8 times before the final demonstration results were obtained, and the entire research and development process took more than 180 days.
"The overall quality of the concrete is excellent, and the indicators are good, which can meet the requirements of the Palace Museum." The affirmation of the builder made the members of the innovation studio team happy.
It is understood that at present, the bottom plate of the office building of the North Courtyard Project of the Palace Museum (a bid section) has been poured, and the restoration building of the main part of the project is also being poured, and it is expected that the three single buildings in the first bid section will complete the capping of the main structure in October.
As a major cultural facility in the national "14th Five-Year Plan" and a key construction project of the central and state organs in Beijing, the North Campus of the Palace Museum is expected to be completed in 2025, which will further help the evacuation and restoration and protection of the ancient buildings of the Palace Museum, effectively alleviate the problems of scientific protection, display and utilization of large-scale precious cultural relics, and form a modern exhibition system that combines physical exhibitions and digital exhibitions, complementing the advantages of the Palace Museum and the main courtyard of the Palace Museum, and providing better visiting services and cultural experience for the general public.