Then Zeng Guilin, President of Huhai Institute of Building Research, Hu Yuanhong, Chief Engineer, Li Qing, Dean of the School of Civil Engineering of Gongji University, and Professor Jiang Zhengwen also made academic reports, and the last one to make a report was Li Ruoyu, the youngest person in the audience.

Li Ruoyu said without humility or arrogance: "Leaders, experts, the topic of the report I made today is the application prospect of high-performance concrete in engineering. At present, the rapid development of China's construction industry requires concrete technology to keep pace with the times. At present, the latest international concept of high-performance concrete has been proposed, and the development of high-performance concrete is the general trend of the development of concrete materials today. In recent years, concrete has been increasingly used to construct long-span, heavy-loaded, high-rise and structures that need to withstand harsh environmental conditions, such as long-span bridges, high-rise buildings, undersea tunnels, offshore oil production platforms, waterproof pipelines, etc. This requires concrete to have good physical and mechanical properties and long-term durability, and it is obvious that ordinary concrete cannot meet the requirements of this era. In urban construction, due to the shortage of construction land, more high-rise or super high-rise buildings are needed. High-rise buildings need to be green, sustainable, and energy-saving, land-saving, material-saving, and water-saving, and high-strength and high-performance concrete can meet these conditions. Generally speaking, the construction of a building with concrete with a low strength grade will consume a lot of materials to form large-size concrete beams and columns, which not only occupy an area but also consume materials; The use of concrete with a higher strength grade can reduce the phenomenon of fat beams and columns, use less materials, and build more durable buildings. ”

"Specifically, the meaning of high performance of concrete mainly includes high strength, high toughness, high durability and large flowability. The concrete with a high degree of working degree must be concrete with good fluidity and pumpability, which is the condition of industrial pumping construction. Generally speaking, high-performance concrete should achieve a slump of more than 180 mm, without producing excessive water leakage, and can control the slump loss to ensure the construction requirements. Good physical and mechanical properties, high-performance concrete should have high strength and volume stability, long-term durability, which is the most important performance of high-performance concrete. It should have a service life of hundreds of years instead of the 40~50 years usually required for ordinary concrete. Developed countries have carried out research on high-performance concrete, so in this regard, we must closely follow the latest development trend of the world's concrete technology in order to achieve our leapfrog development in concrete technology. With the establishment of our Concrete Technology R&D Center, we will focus on technical research on high-performance concrete. ”

"The first is the research on formulation technology. Compared with traditional concrete, high-performance concrete has two main differences in the ratio of raw materials, namely low water-cement ratio and multi-component. The purpose is to increase the compacting process of concrete, improve the interface performance between aggregate and cement slurry, so as to achieve high performance requirements. In terms of raw materials, especially high-performance superplasticizers, it is necessary to carry out research, and only the introduction of high-performance superplasticizers can realize the preparation of high-performance concrete. In the research direction of high-performance superplasticizer, we are going to carry out the development research of a superplasticizer called polycarboxylic acid superplasticizer, and we know that waterlessness is an important role played by surfactants in the cement hydration process. The superplasticizer can reduce the unit water consumption under the condition that it does not affect the workability of concrete; or without changing the unit water consumption, it can improve the workability of concrete; or admixtures that have both of the above effects without significantly changing the gas content. Polycarboxylic acid high-performance superplasticizer is a kind of grafted copolymer polymer with molecular design, and the raw materials for the synthesis of polymer backbone are mainly maleic acid and acrylic acid. Once this high-performance superplasticizer is successful, it can achieve a water reduction rate of more than 30% with a very low dosage, which is impossible to achieve by any superplasticizer at present. ”

"Of course, in addition to these formulation technologies, we need to cooperate with our Shanghai Institute of Building Research, Architectural Design Institute and School of Civil Engineering of Gongji University in terms of mechanical properties and durability of high-performance concrete, as well as architectural design. I think when these problems are solved, our high-performance concrete can be vigorously promoted, which is definitely a very good thing for our construction industry and ready mix concrete industry, it can greatly improve the progress of our construction industry, and the quality of construction will also be improved by leaps and bounds. In order to achieve this goal, everyone in our industry needs to work hard, thank you! ”

Li Ruoyu's report is so wonderful, whether it is an expert from the Academy of Building Research or a senior cadre like Bai Yujing, they are all cheering for this young man in their hearts! Although Li Ruoyu is the youngest person in the venue, he is talking about the world's most cutting-edge concrete technology, which is not exciting. If, according to what Li Ruoyu said, high-performance concrete is popularized in a large area, this is a huge good news for the country, society and people!

Li Ruoyu's report was finished, that is, the highest leader Bai Yujing made a concluding speech, she fully affirmed today's summit forum, and commented on every expert who made a report, and emphasized that this concrete summit forum must be held, and more industry people should be invited to participate in the forum to expand the influence of the forum. Finally, she congratulated the summit on its success.

Next is the most important agenda, the election of the establishment of the Shanghai Ready Mixed Concrete Industry Association. After the joint nomination of the Huhai Municipal Construction Committee and the Construction Engineering Administration, and then the voting of all the participants, the first chairman unit of the Huhai Ready Mixed Concrete Industry Association, the Huhai Concrete Technology R&D Center, and the president Li Ruoyu. There are five vice chairman units, including Huhai Yijian Concrete Co., Ltd. Finally, it is the permanent organization of the association, Mi Yun was elected as the secretary general of the Shanghai Ready Mixed Concrete Industry Association, and is fully responsible for the daily work of the association.

There is still a lot of work to be done for the establishment of the association, and at the moment it is only an election. The next work will be mainly in charge of Secretary-General Mi Yun. Of course, Mi Yun was so happy in her heart, she didn't expect that she would be nominated as the secretary general, let alone that she would be unanimous. Although this is a bit unexpected, but she is very excited in her heart, because after serving as the secretary general of the association, she will have more opportunities to get along with Li Ruoyu, although she knows that she is destined to have no results with Li Ruoyu, but she is still looking forward to it, as long as she can often work with Li Ruoyu, she will be very satisfied.

The biggest dark horse is Li Ruoyu, who himself didn't expect to be nominated as the president, and he actually voted unanimously. Because he knows that his qualifications are too shallow, the vast majority of people present are more senior than him, he is just a young man who has just worked for a year, but he unexpectedly became the president of the Huhai Ready Mixed Concrete Association, which can not but be said to be a miracle.