Hong Jinxiang develops functional cement asphalt mortar to realize domestic substitution of new high-speed railway-based materials

As a young scientist who has the courage to study and explore, Dr.
Hong Jinxiang has shown extremely high resilience and passion for innovation
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China's high-speed railways not only lead the world in terms of mileage and speed, but are also known for their smooth operation
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As the so-called "the foundation is not strong, the troubles are endless", behind this, the roadbed engineering has made a great contribution
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An excellent roadbed needs a solid foundation and unobstructed drainage, and it must also withstand the test of harsh weather such as freezing and rain washing.
At this time, a reliable engineering material is needed as a support
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The functional cement asphalt mortar developed by Dr.
Hong Jinxiang and his team effectively solves the technical difficulties of roadbed materials and also realizes the domestic substitution of China in this field
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Concrete and asphalt are added to solve the problem of rigidity.
Recalling the railroad tracks that were covered with stones when I was a child, today's high-speed railways are generally bare and ballastless tracks
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Under the premise of achieving high-speed operation, high-speed railways need to consider ride comfort and stability, so the accuracy of up and down fluctuations is controlled at the millimeter level
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In the past, although the sand and gravel of ordinary railways played a very good role in cushioning, the centimeter-level fluctuations would still make people taking high-speed railways feel uncomfortable.
In fact, it is also due to the rigidity of the laying material
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After substituting concrete for loose gravel, the rigidity of the material is still a problem to be solved.
At this time, Dr.
Hong Jinxiang and his colleagues thought of the asphalt used for road paving
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When hard concrete encounters flexible asphalt, both rigid and flexible, this new material called "functional cement asphalt mortar" has become a key component of high-speed rail construction after being widely used
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Dr.
Hong Jinxiang introduced to reporters: If other organic materials are used, there will still be problems such as excessive deformation and high cost.
In contrast, cement asphalt mortar has become a ballastless track material relying on the advantages of the material's own characteristics and economic costs.
The optimal solution
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After the completion of the research and development, this new type of mortar developed by the team of Dr.
Hong Jinxiang was finally applied to the Beijing-Shanghai high-speed railway.
The opening of this railway also heralded the take-off of China's high-speed railway.

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Behind the success of the material research and development, it is the pavement for failure.
In the interview, Dr.
Hong Jinxiang told reporters more than once the difficult story behind the research and development of this material
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He introduced that in the early stage of exploration of China's high-speed rail construction, the German technical team was mainly behind the guidance
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At that time, Germany had built an advanced high-speed rail network, but the mileage was not long
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Although the world-famous Japanese Shinkansen has a long mileage, it is still lacking in speed, and the entire industry is still in the stage of exploration
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Take the new material as an example, a lot of bubbles will be generated on its surface, which will affect the connection with the superstructure
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Similar materials abroad will allow bubbles to exist, and in order to ensure quality and service life, China must strictly control the number of bubbles in the technical standards proposed, which presents a problem for Hong Jinxiang's team
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In addition, returning to the above-mentioned combination of rigidity and flexibility, the new material requires good fluidity, which must flow like water while maintaining its stability.
It will sink if it is too soft, and it will not be connected if it is too hard.
It is necessary for the R&D team to find the most suitable raw material ratio through continuous experimental exploration
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Recalling the research experience at the time, Dr.
Hong Jinxiang said with emotion: “If you do not seize such an opportunity, you will only be turned away
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” As a national-level project, the competition was very fierce.
On-site testing of each company's products, which can meet the standard, even if it wins the bid
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If you choose to give up due to technical difficulties, it will not only be a loss for the individual and the team, but also have a huge impact on the future development of the entire company
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With the efforts of the entire team, Hong Jinxiang's team carried out experimental research in various places and continuously improved, and was finally selected by the construction party, and finally completed the task perfectly
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It is under the background of introduction, digestion, absorption and re-innovation that China's high-speed rail completed overtaking in a short period of time and stood at the world's leading level
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Researchers, need sufficient resilience.
When asked how Chinese companies can solve the problem of "stuck necks" on the road to technological innovation, Dr.
Hong Jinxiang borrowed a sentence from Premier Li Keqiang in the government report: "Ten years to sharpen a sword.
Build our core technology
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"Why do we keep getting stuck? This is because innovation is not an easy task.
It cannot be quick and quick
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Many companies hope that when they invest, there is output, which is impossible
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" "From another aspect of innovation, failure The probability is also very high, and the cycle is particularly long, so scientific research and innovation personnel must have enough persistence
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" At this time, Dr.
Hong Jinxiang also talked about his own experience.
Behind the successful research and development of new materials, there are countless failures and explorations, and more than ten years of perseverance has brought fruit
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Before the start of the Beijing-Shanghai high-speed railway, their team was already conducting relevant research, but in order to complete the construction period as soon as possible, they have been in the state of construction and research.
The pressure can be imagined
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From another perspective, many technology companies or the investors behind them now pay more attention to whether the product can be commercialized and whether it can be quickly put into the market for realization
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In this regard, Dr.
Hong Jinxiang also gave his opinion: “From the perspective of managers and founders, scientific research and innovation must have a tolerant, nourishing mentality, and a long-term vision
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” This may also be the current lack of technology companies The good quality
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But fortunately, the country has realized this from top to bottom
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Judging from the whole interview, as a young scientist who has the courage to study and explore, Dr.
Hong Jinxiang showed extremely high resilience and enthusiasm for innovation
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It is precisely because of the efforts of a large number of scientific researchers like him that our country's many "stuck neck" breakthroughs are slowly becoming a reality
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Author: Jiaheng