NEXCEL Convened Project Concluding Meeting
Time: 2024/08/19 Publisher： oiginal Views：
Introduction
On August 2, 2024, NEXCEL convened the Project Concluding Meeting for 2022 TDA Projects and 2023 SFP Projects in Beijing. The review panel, composed of ten renowned experts from Technical Advisory Committee of NEXCEL, has conducted rigorous and objective evaluations of the project outcomes.
2022 TDA projects & 2023 SFP projects resulted in a total of
20 papers (13 SCI&EI papers)
17 patents
9 industry and group standards
2 production lines
10 engineering demonstrations
usage of 12,100 tons of polymer
reduction of 2,709 tons of CO2
Project teams of NEXCEL have proposed the first standard for fiber-reinforced thermoplastic reinforcement rebars and the standard for recycled plastic used in building plastic templates in China and aborad. They have also proposed the double cone test method standard for the tensile properties of FRP composite materials.
Project teams have replaced more than 20% of asphalt in asphalt mixtures with recycled thermoplastic plastics, and replaced mineral powder with thermosetting plastics up to 100%. The ultra-highly dispersing polycarboxylate developed by the project team significantly improves the workability, mechanical properties, and durability of UHPC at extremely low water-to-binder ratios. This achievement has resulted in a reduction of more than 35% in cement consumption and more than 25% in water consumption for C30 to C50 concrete.
The review panel spokehighly of the project achievements and recognized that the products and technologies have high economic and social benefits, and extensive potential for applications. The establishment of standards, demonstration projects, and production lines provides guarantees for the transformation and application of research results. These achievements not only respond to China's dual-carbon strategy but also demonstrate the potential of nonmetallic materials in promoting green and sustainable development.
NEXCEL will continue to deepen the application of nonmetallic materials in the building and construction sector, promote more project results to be transformed into new quality productive forces to build a more sustainable future. At the same time, NEXCEL will further strengthen cooperation with different institutions, and work together to promote technological progress and industrial development in the field of nonmetallic materials.
22TDA1-1 "Comprehensive Promotion and Improvement of FRP Reinforced Composite Materials and Engineering Structural Members"
The project team has successfully developed the high-modulus FRP pultruded profiles with B1 fire retardant.This product has been used in the external hanging structural beams of high-rise buildings in coastal areas and it could reduce carbon emissions by approximately 74% compared to traditional steel structures.
22TDA2-4 "Mechanical Foaming Warm Mix Asphalt Characteristics and Mixture Performance Improvement and Engineering Demonstration"
The project team conducted research on the foaming parameters and production processes of foamed asphalt using oil from different sources, and developed a new type of polymer additive that significantly improves the performance of foamed warm mix asphalt. The cost of adding the additive per ton of asphalt mixture is less than 10 CNY. The project results have been successfully applied to paving projects on highways in Xinjiang and Anhui province. Compared to hot mix asphalt mixtures, the working temperature is reduced by 20-40℃, and toxic gas emissions such as asphalt smoke and benzene soluble matter are reduced by more than 80%. The emissions of CO2, NOx, and greenhouse gas are reduced by more than 50%.
22TDA3-1 "Research and Application of Novel Polyether Macromonomer and Ultra-highly Dispersing Polycarboxylate Superplasticizer"
The project team has successfully developed an ultra-high dispersion polycarboxylic superplasticizer and a low-carbon mix design for C30~C50 concrete. By increasing the dosage of polycarboxylic superplasticizer, the amount of cement and mixing water can be significantly reduced, achieving a low-carbon, economical, and durable concrete preparation technology. The project results have been used in three projects, including the Moshuihe Bridge, the Xiaoqinghe Grand Bridge, and the underground pipe gallery in China. The emission of CO2 per cubic meter of concrete has been reduced by 74.8 kg.
22TDA4-1 "Development and Demonstration of Composite Lattice Tower for Communication and Power Transmission over 15m"
The project team has developed and demonstrated FRP lattice towers for 5G communication. An 18-meter FRP communication tower was designed with FRP structure as the main beam, steel structure as the secondary beam, and connected by mortise and tenon with bolts. The project results have been applied in Egypt and Guangzhou, China. Compared with steel towers of the same type, the total mass of the FRP tower is reduced by 31%, the installation time is shortened by 40%, and the CO2 emissions are reduced by 43%.
23SFP1-2 "Effects of Recycled Plastics on the Performance of Asphalt Mixture"
The project team has developed capacity enhancers and composite modifiers, and optimized physical preparation processes to achieve a 20% substitution of asphalt quality with recycled thermoplastic plastics. At the same time, a technology for high-dosage (≥50%) substitution of traditional fillers with recycled thermosetting plastics has been developed. The project results have been demonstrated in Jiangsu with 9.8 tons of recycled thermoplastic plastics and 23.6 tons of recycled thermosetting plastics.
23SFP2-1 "Standardization of Product Properties for Continuous Fiber Reinforced Thermoplastic Resin Composite Rebars"
The project team developed a bending device and molding equipment for thermoplastic FRP rebars, and successfully produced three types of FRP rebars. Additionally, they investigated their thermal bending performance and established the "Thermoplastic Fiber Reinforced Composite Rebar" standard. These research achievements provide strong support for the promotion and application of thermoplastic FRP rebars in engineering projects, and also promote the development of China's thermoplastic FRP industry.
23SFP3-2 "Standardization and Demonstration of Preparing Building Formwork with Waste Plastics"
The project team conducted research on the production, physical and mechanical properties, application, and resource utilization of five types of general plastics and five types of engineering plastics. They analyzed and selected polypropylene, polyvinyl chloride, and polycarbonate plastics suitable for producing building templates. They set up a waste plastic building template production line with an annual output of 350,000 square meters. The project achievements were demonstrated in Henan, where 2,800 square meters of waste plastic building templates were used, with a waste plastic content of up to 60%. The templates can be reused more than 30 times, resulting in a reduction of 26.4% in CO2 emissions compared to traditional plastic templates.
23SFP4-1 "Development of Self-healing Fire-retardant Coatings Highly Compatible with Nonmetallic Surfaces"
The project team used a precipitation-hydrothermal method to prepare a water-like composite material and graphene composite material with flame retardant properties. They also used an in-situ polymerization method to prepare a urea-formaldehyde resin-encapsulated tung oil microcapsule with self-healing properties. By mixing these materials with epoxy resin, they developed a self-repairing flame retardant coating material. The composite material with 10 wt% microcapsules and 15 wt% flame retardant achieved a V0 level of flame retardancy, with a water resistance of over 200 hours. The coating adhesion was improved by 30% compared to traditional coatings, and the strength self-healing rate was as high as 108.8%.
