I! Pretending to Be Reborn, Director of Doomsday Hoax

The director is sure of this.

It took more than ten years for the super cold-resistant concrete research institute and experimental center in Sakura Country to obtain the current compound air-entraining agent.

Scientific research is to take your time.

The probability of overtaking on the Longguo curve is too small.

Therefore, the severe cold concrete in Longguo should be upgraded from multiple aspects, and each step may have its own processing method.

In other words,

It is impossible for other countries to steal this technology!

In the current doomsday, human beings are often selfish.

Just like before, countries such as Sakura Country and Berry Country blocked their own high-tech and technology from Dragon Country.

It is estimated that the specific parameters of cold concrete will also become a state secret.

Thinking of this, the director of the institute's eyes darkened, and said:

"Our research on air-entraining agents is almost at the last point, we can't give up...

"The concrete of the Dragon Kingdom has nothing to do with us, just as their nuclear energy difference machine cannot bring new hope to our ring-country train!

"Longguo used its own 100 years to tell us that we are strong only when we are strong! Our air-entraining agent is not as good as Longguo's severe cold concrete, but...it is also the second largest in the world!" Air-entraining agent, Perhaps it will become our good bargaining chip with other countries! "

Think from another angle.

This air-entraining agent is not a failure.

Rather, it can improve the cold resistance and durability of concrete in Sakura Country to the second highest in the world!

Dragon Kingdom, inside the Dangerous Information Bureau building.

At this moment, the crisis bureau building has become one of the most forested places protected by the Dragon Kingdom.

The old man from Longguo even personally told the military headquarters to ask them to increase the protection of this area.

Qinghua University and Yenching University, the two top schools in the Dragon Country, have been fighting for the top spot for decades.

No one thought that because Xu Qiu's dangerous situation is located in Qinghua University, this university has become the academic center of the whole country!

Every day, there are countless top people in various fields entering and leaving the crisis bureau building of Qinghua University.

Even many professors from Yenching University moved to Tsinghua University to live in Tsinghua University, just to make it easier to work and be closer to Xu Qiu... The battle between the two famous pyramid schools came to an end because Xu Qiu was alone.

Today's Qinghua University has also become the focus of Dragon Kingdom, the center of global attention!

Inside the Office of the Director of the Crisis Bureau.

Xu Qiu sat on a chair, and in front of him stood Yan Yan and other material science experts from Shenlong Construction Engineering Group.

"It's not easy..."

After a long time, Xu Qiu breathed a sigh of relief, closed the more than 400-page research report in his hand, and pushed it aside.

Li Bingqing understood, and immediately put the "Severe Cold Concrete Cold Resistance and Durability Technology Research Plan" into the safe and shrank it.

This is the secret of Dragon Kingdom.

It is also the core technology related to a country's high-tech and comprehensive scientific and technological strength.

Not to be lost.

Xu Qiu took a sip of tea, without looking at Li Bingqing, and said, "Professor Yan Yan, comrades, the experimental results on cold concrete have exceeded my expectations!"

He stood up, with gratitude in his voice, and said: "Because of the birth of this cold concrete, Dragon Kingdom will perform a miracle of material science in the last ten months! The people of Dragon Kingdom will also thank you for your support." wisdom

Yan Yan and the others bowed quickly, not daring to take credit.

"Director Xu, it is only after your guidance that the severe cold concrete has the correct direction..."

Yan Yan has adoration on his face,

This stubborn old man, who refused to accept power, had a face full of respect at this moment, and he had already regarded Xu Qiu as a role model to worship!

"Director Xu, according to our original research progress, I'm afraid it will take five or six years just to develop concrete that can be used at minus [-] degrees." The temperature condition has dropped to minus [-] degrees! "

When everyone heard the temperature, they subconsciously found it incredible.

What is the concept of minus seventy degrees?

One of the professors of extreme cold research in materials science had trembling eyebrows.

He specializes in the cold resistance of materials, and had been working in a village in the Arctic before he was recruited to the Cold Concrete Development Department.

The country built a scientific research station and an extreme cold laboratory in that village.

In that village, winter can reach minus [-] to [-] degrees.

The men in the village are low-level working people, without high technology to keep warm, and can only rely on wearing very thick clothes when going out.

For a person who weighs [-] kilograms, the clothes on his body may weigh [-] or [-] kilograms...

The standard winter cold-proof clothes for the locals are eight pieces of clothing for the upper body, five to six pieces for the lower body, three pairs of socks, and a pair of snow boots.

You know, it's only minus forty degrees...

People are already at risk of having difficulty breathing at any time because they can't open their breath,

The skin dare not be exposed to the air at all, otherwise, it will become the same as the frozen pork in the freezer within 1 minutes.

What shocked him the most was.

The local job has a very high salary, two hundred dragons an hour, which is almost hard work, and it is easy to freeze your fingers.

And many local refugees would rather starve to death than do these jobs...

Freezing to death is far more cruel and terrifying than dying from starvation.

This professor, because of the needs of his research work, had to go to the laboratory in the north, where the temperature was around minus [-] degrees.

Traveling is a warm-keeping equipment worth millions of Long Guoyuan.

Outdoor work should not exceed half an hour at a time, and the total outdoor working time in a day should not exceed two hours!

It's only sixty degrees below zero!

And the cold concrete can work at minus seventy degrees...

Under this temperature, even steel can be frozen, thrown on the ground, the hard steel may be broken into ice slag!

Yan Yan bowed and said: "Director Xu, we plan to continue to develop severe cold concrete according to your guidance at that time! We will strive to obtain the second and third generation severe cold concrete before the Little Ice Age!" Unexpected Yes, Xu Qiu shook his head.

He said: "The cold resistance of concrete has a limit.

"Now the cold resistance of cold concrete has been able to cope with the Little Ice Age. As long as the construction period will not be delayed due to low temperature, our goal will be achieved!

"No matter how much research is done, if the essence of concrete does not change, it is impossible to adapt to the temperature of minus two hundred degrees in the extremely cold era!"

Or, to put it more desperately,

At present, there are only a handful of machines and materials that human beings can withstand the extreme cold of minus [-] degrees.

Yan Yan was silent.

Indeed, they also gradually felt that when the frost resistance of concrete reached around minus [-] degrees, it was already difficult to make progress...

"Director Xu, what surprised us is that you didn't focus on air-entraining agents in your research on cold concrete back then, but focused on other aspects!" Yan Yan said with emotion.

In fact, not only Shenlong Construction Engineering Group,

All domestic enterprises and companies researching concrete, as well as global concrete science experts, are trying to obtain more advanced air-entraining agents.

Yan Yan and others initially planned to start from here.

However, Xu Qiu directly rejected it and provided a new direction.

With no ups and downs on Xu Qiu's expression, he said:

"Although the incorporation of air-entraining agents is the most effective means to improve the frost resistance and durability of concrete, the incorporation of air-entraining agents will also reduce other properties of concrete, such as strength and corrosion resistance.

"Moreover, the air-entraining agent can only bring about a small increase in frost resistance.

"If you want to get cold concrete, you must start from many aspects, and point to the essence of concrete!"

When Xu Qiu went to Shenlong Construction Engineering Group, what he gave was a plan to improve the frost resistance and durability of concrete from the very beginning.

In addition to air-entraining agents,

Xu Qiu additionally applied a water reducing agent!

This is something that has been ignored by the field of concrete material science in the world,

After being reminded by Xu Qiu, Yan Yan and others added water reducing agent, and finally found that the use of water reducing agent can greatly reduce the water-cement ratio of concrete, and improve the strength and compactness of concrete!This improves the ability of concrete to resist freeze-thaw damage, thereby improving the durability of concrete against frost! !

Yan Yan was very excited and said: "After more than half a month of testing, we finally found that the high-efficiency superplasticizer has a very good effect. Keeping the workability unchanged, it can reduce water by 25%, increase R28% by 90%, and increase water resistance by [-]%. Penetration

Four to five times higher, and the cold resistance has also increased by about 20.00%! "

What shocked this group of materials scientists and professors the most was,

It's actually an active mineral admixture!

The materials science professor at the polar laboratory said:

"Concrete is the most widely used and most used man-made building material in various construction projects, and among the constituent materials of concrete, cement is the most expensive!

"Before your guidance, Director Xu, most of these active mineral admixtures were used to replace cement to improve economic benefits and reduce costs!

"Who would have thought that these active mineral admixtures can also become a treasure to improve the technical performance of concrete!!"

For example, silica fume.

This thing is used in various countries, and it is widely used as a substitute for cement to reduce costs.

In Berry Country, Cherry Blossom Country and other countries, silica fume has even become the main mixing material for concrete!

however,

Some people realized that when the air-entraining silica fume concrete is kept within a certain concentration, and the dosage of silica fume is maintained between 12.00% and 15.00%, the frost resistance and durability of the concrete will be improved.

II

. .

This improvement is not obvious when the concrete has just been mixed into the finished product.