Core outcome

Number	Core technology name	Core results description
1	The key technology and engineering application of long-term transport concrete performance maintenance	At present, the product supply of concrete mixing station is visually, and the supply plan for the next day is submitted before work the previous day, including concrete strength grade, supply location, arrival time, supply quantity, etc. Due to various reasons, the actual arrival time of the site often changes, if in advance, the concrete mixing station is immediately delivered after the notice, and the time for the concrete transport truck to arrive at the site takes 1-2 hours; If delayed, after the concrete mixing station receives the notice, the concrete transporter is often on the road. Solving this problem that occurs every day in the concrete industry will greatly improve the construction efficiency of the construction project and improve the customer satisfaction of the mixing plant. The use of redundancy technology can cancel the construction party's advance order for concrete supply, solve the difficulty of the construction party's concrete arrival time is difficult to determine, and reach the construction party's order, the concrete will arrive at the designated site within 15min. The key to redundancy technology is to maintain technical support by long-term conveying concrete performance.
2	Long afterglow luminescent building materials (decorative materials) key production technology	Long-lingering self-luminous materials are also known as light-storage luminescent materials, which store excitation energy in the excited state when excited by the light source, and then slowly release the energy in the form of light when the excitation stops. A new type of long-persistence geopolymer concrete was prepared by combining long-persistence self-luminous material with alkali-excited gelling material. When the long-afterglow geopolymer concrete is applied to a building, the surface of the building receives light during the day, and the luminous cement stores energy when it is excited by the light source. When night falls, the long-afterglow geopolymer concrete releases the stored energy in the form of light. Under the condition of full sunlight, the long-afterglow geopolymer concrete can emit the afterglow visible to the human eye for more than 500 minutes and can continue to emit light. Meet the luminous needs. At the same time, the process of absorbing light - luminescence - storage - re-luminescence can be repeated indefinitely, only sunlight excitation can emit light, and the aging of the material will not occur, which is a green environmental protection material and can save a lot of energy. The light emitted by it is a clean light source with adjustable brightness, soft and not harsh, which can avoid discomfort for passers-by or drivers, and has a variety of colors to choose from. The large-scale use of long-afterglow geopolymer concrete as a building material can create a better atmosphere for the city at night and create a new city card.
3	Design Method for the Distribution of Concrete Cementing Material Particle Size	American scientist T. C. Powers put forward the gel space ratio theory reflecting the relationship between the strength of cement and its porosity, pointing out that under the premise of a certain porosity, the smaller the size of the hole or gap, the higher the strength. The particle size distribution of cement has obvious influence on pore structure. Taylor, a British cement chemist, hypothesized that the more hydrated cement is, the stronger it is. Academician Wu Zhongwei pointed out that there is an optimal H/L particle (small crystal size/dense) ratio for the strength of cement stone under a certain void ratio. Professor Lian Huizhen of Tsinghua University has quantitatively analyzed the relationship between H/L particle ratio and cement strength, and confirmed and developed Taylor's view. The crystal ratio theory states that in the hardened cement slurry, there must be a certain amount of clinker or mixed material such as unhydrated material. Based on the theory of cementity-space ratio and crystalline cementity-ratio, the design method of particle size distribution of concrete cementified materials is proposed. The key technologies of this method include: (1) optimal clinker particle size distribution curve, (2) concrete cementitious material group particle size distribution model, and (3) technology and equipment to realize the group particle size distribution of concrete cementitious material. The clinker content in C30 and C60 concrete can be reduced to 70kg/m³ and 100kg/m³ through the particle size distribution design of concrete cementing materials.
4	Concrete quality control method based on the principle of cybernetics	The establishment of cybernetics is one of the great scientific achievements of the 20th century, and many new concepts and technologies in modern society are almost closely related to cybernetics. The application scope of cybernetics covers engineering, biology, economy, society, population and other fields, and it has become a science to study the common control laws in various systems. The core of cybernetics is to study information extraction, information dissemination, information processing, information storage and information utilization in a general sense. Cybernetics is fundamentally different from the information theory that followed. In an abstract way, cybernetics reveals the characteristics and laws of information transmission and information processing of all control systems, including living systems, engineering systems, economic systems and social systems, and studies the possibilities and ways to achieve different control purposes with different control methods, without involving the transmission and processing of specific signals. Information theory focuses on the measurement theory and method of information, and on this basis studies the relevant methods and technical problems related to the effective transmission and processing of information in the actual system, such as coding, decoding, filtering, channel capacity and transmission rate. Through the interdisciplinary research of cybernetics and concrete quality control, the concrete quality control model based on the principle of cybernetics is established, which has improved the level of concrete quality control.
5	Concrete strength control method based on statistical principle	The standard deviation and pass rate of the strength of the concrete are the basic statistical indicators of the concrete mixing plant and the important basis for judging the strength control level. But the two statistics are used separately. If the connection between the two can be established, it will provide more information and ideas for intensity control. This technical research applies the principles and methods of statistics to establish a concrete strength evaluation and control method, which links the qualified rate, standard deviation and average value with quality assurance coefficient, provides more comprehensive information than the qualified rate, standard deviation and average value, and provides a measure to evaluate the reliability of concrete strength in the production process. The qualification rate of counting statistics can only provide the proportion of unqualified data, and the quality assurance coefficient can not only obtain the qualification rate close to that of counting statistics, but also reflect the safety degree of quality indicators, characterize the quality assurance ability of the process, and find the possible trend of unqualified data. The quality assurance coefficient can be improved by reducing the standard deviation or increasing the average value, and the state of quality control can be judged by the quality assurance coefficient.

Patent
Huijiang Group has made remarkable achievements in technological innovation and research and development. Up to now, the company has obtained 107 authorized patents, including 25 invention patents, 81 utility model patents, 1 appearance patent and 3 international patents . These patents cover the company's innovation achievements in many fields such as concrete materials, production processes and equipment technology, reflecting Huijiang Group's technological leadership and strong research and development strength in the industry.

Standard setting
Huijiang Group, as the industry leader, has participated in the development of 5 national standards and 2 group standards. This not only reflects the group's deep technical heritage and strong professional strength, but also shows the group's contribution to promoting the standardized development of the industry。

Number	Standard type	Standard name
1	National standard	GB/T 45002-2024 Method for determination of water retention of cement mortar
2	National standard	GB/T 21372-2024 Portland cement clinker
3	National standard	GB/T 12959-2024 Determination of heat of hydration of cement
4	National standard	GB/T 43487-2023 Test methods for foamed concrete and its products
5	National standard	GB/T 40376-2021 Cement-based bonding materials for interior decoration
6	Group standard	T/CECS 10356—2024 Flocculant for the treatment of washed sand aggregate wastewater
7	Group standard	T/CBMF 249—2024， T/CCPA 44-2024 Technical specification for application of nickel-iron slag powder concrete

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