The attention of the experts and leaders attending the meeting was all attracted by the content of Qin Haijuan's speech on the podium.

Qin Haijuan's long paper systematically introduces various aspects of the performance of high-performance concrete. Although the experts and leaders who came to the meeting today have learned about high-performance concrete, even so, Qin Haijuan's report at this time still brought them countless shocks. Especially Professor Lin, she never thought that the director of the laboratory of a private concrete enterprise would have such a high theoretical level!

Of course, after the report on high-performance concrete, Qin Haijuan also talked about the necessity of developing private concrete enterprises.

State-owned concrete enterprises have a serious shortcoming, that is, the cost remains high, which is not a problem that can be solved by simple management, that involves a larger thing, about iron rice bowls, and the welfare of those workers. If these things cannot be solved, it will be impossible for the production costs of state-owned enterprises to be reduced. Although it seems that the profits of state-owned concrete enterprises are still very considerable, but that is in the absence of competition, once the market is liberalized, foreign capital also enters the concrete market, and private capital also enters the concrete market, then there will be a crisis in state-owned concrete enterprises.

Of course, it is not a bad thing to cause a crisis for state-owned concrete companies, which at least makes them aware of the seriousness of the problem, and if there is no competition, there will be problems in the concrete market. Of course, the competition should not be too strong, and appropriate competition is the way to the healthy development of the market.

Qin Haijuan's speech won unanimous praise and warm applause from experts and leaders, and then the domestic concrete authority and Professor Tai Doulin spoke.

As a member of the party group of Mizuki University, Professor Lin still has a certain status in Mizuki University. Although in Li Ruoyu's view, the member of the party group of Shuimu University is really a chicken position, although it has the title of department, not to mention compared with the local department level, even compared with the actual department level in some places, this department level in the university is not much of a position.

It is for this reason that many university professors attach so much importance to political performance. In the conference room, Professor Lin held a stack of materials, stood up and talked eloquently.

"As a developing country, and also a developing country that is quite backward in science and technology, if China wants to maintain its status as a great power, it must learn from the advanced experience of foreign countries. The introduction of foreign advanced technology is a development direction, but at the same time, we must not forget to develop new technologies ourselves. Some comrades may say that it is better than those projects that have to use tens of millions of dollars to directly buy the existing mature technology from abroad. When we have the ability, we will start to resume our own research. Comrades, this idea is unacceptable! Professor Lin said with a sad look.

"Our country is now weak in foundation, and we are more cautious about investing in scientific and technological research. Superior funds must be used for economic construction. However, such a situation cannot last forever, and I believe that after economic construction is carried out, investment in scientific research will also increase. Because everyone understands a truth, even if you buy more advanced things, these things can only last for a while, and cannot be used for a lifetime. If we can't grasp the frontiers of science all the time, then we will have pigtails to be caught by people abroad. This will be a big loss. Think about how much we invested in technology in China during World War II? Guns can't be made ourselves, and if there is an external change, we will be greatly affected. If we had been able to have our own complete industrialization at that time, how could the War of Resistance have lasted for eight years? Professor Lin said.

"Far away, when it comes to our concrete, at the end of the 19th century and the beginning of the 20th century, China also began to have reinforced concrete buildings, such as the Bund in Shanghai, the sand surface in Guangzhou, etc., but the scale of the project is very small, and the number of buildings is also very small. After liberation, China carried out large-scale socialist construction on the basis of a backward national economy. With the development of engineering construction and the country's further reform and opening up, concrete structures have been rapidly developed and widely used in various engineering construction in China. ”

"Since the 70s of the 20th century in China, in general civil construction, the stereotyped and standardized prefabricated reinforced concrete components have been widely used, and with the development of building industrialization and the implementation of wall reform, the prefabricated large slab residential building has been developed, and the large mold shear wall load-bearing structure plus hanging plate or external brick wall structural system is widely used in multi-high-rise buildings. The frame light board system has also been studied in various places, and the lightest is only 3~5kN per square meter. Due to the great reduction of the self-weight of this structural system, it not only saves material consumption, but also has significant advantages for the seismic resistance of the structure. ”

"After the reform and opening up, concrete high-rise buildings have also developed greatly in China. Following the construction of Beijing Hotel, Guangzhou Baiyun Hotel and a number of high-rise residences in the 70s of the 20th century, in the 80s, the development of high-rise buildings accelerated the pace, the structural system was more diversified, the number of floors increased, and the height increased, and it has gradually occupied a leading position in the world; Hong Kong's Central Plaza is the world's tallest concrete building with 78 floors and 374m of triangular planar tube-in-tube structure. Guangzhou International Building, 63 floors and 199m, is the world's tallest partially prestressed concrete building in the 80s. With the development of high-rise buildings, the structural analysis methods and experimental research work of high-rise buildings have been developed extremely rapidly in China, and many aspects have reached or approached the international advanced level. ”

"Concrete structures are also widely used in water conservancy projects, bridge and tunnel projects, and underground structure projects. Sluices, hydropower stations, docks and wharves built with reinforced concrete have been a lot in our country, reinforced concrete and prestressed concrete bridges have also developed greatly, in order to improve urban traffic congestion, urban road overpasses are developing rapidly. With the extensive use of concrete structures in engineering construction, China's scientific research on concrete structures has made great progress. Many new achievements have been made in the research work on the basic theory and design methods of concrete structures, reliability and load analysis, single-storey and multi-storey plant structures, large slabs and rising slab structures, high-rise, long-span, special structures, industrialized building systems, structural seismic resistance and modern testing technology, etc., and the level of basic theory and design work has been greatly improved. But China's research on high-performance concrete, has just started, far behind the world's advanced level, listened to the report of Comrade Qin Haijuan just now, I think it is very good, our Huhai in the research and application of high-performance concrete has been in the forefront of the country! (To be continued.) )