The next afternoon, Liu Mingqi entered the palace with cement river sand and other things, as well as a concrete stake.

Also with him is Liu Mingjing.

When he arrived in the palace, he invited Zhang Qin and Xiong Dabao, who were training the Yulin Guard and Qianniu Guard in the palace.

The four of them arrived all the way to the back of the Ganqing Palace. After a while, the emperor who reported the report came out with a group of ministers.

Jing Hedi, who was in a good mood recently, looked at the piles of big and small things around him and asked with interest: "Mingqi, what other strange things do you have for us to see?"

Liu Mingqi smiled, "Xiaochen is here to offer a raw material for building roads, called cement."

"cement?"

The emperor looked at the pile of things at his hand and felt that it was very ordinary no matter how he looked at it.

However, the concrete stake was a little noticeable.

When he saw the emperor interested, Liu Mingqi asked the guard to bring an iron hammer and asked him to hammer the concrete pile hard.

"Bangbangbang..."

The guards hammered the concrete pile for more than ten times with all their strength before hammering a gap, but it has not been damaged.

The overall shape of the concrete piles is still there.

But the emperor and ministers saw some large and small stones inside the smooth concrete piles.

Everyone present was smart. Ge Songdao, who had been focusing on building roads in the southwest for more than ten years, saw this and said with his eyes lit up: "Your Highness, what is the cement you mentioned... after it is formed?"

"right!"

Liu Mingqi said proudly: "After forming, there are concrete piles, and the concrete piles are so strong that even if elephants step on them, they don't think about trashing them!"

A group of officials present exclaimed.

They have never seen such a strong road surface.

Even the straight road built seventy or eighty years ago is probably not up to this standard.

In fact, the principles of road construction are similar, they just depend on the raw materials.

If there is no raw material on weekdays, use soil or bluestone slabs instead.

There are many things to pay attention to on the official road. They also use soil, but they have strict craftsmanship standards. There are still many things that need to be added, constantly compacted and then compacted, so that they can finally get such a hard ground, so that it can withstand the wind and sun exposure for decades, and carriages and horses are constantly passing through.

But overall, ancient roads were basically filled with dirt, and it was so muddy that it was difficult to travel when it rained.

So you know why in ancient times, the horses of cavalry were so easily injured and damaged, right?

As soon as the speed was fast, the horse's hooves were inserted into the mud and could not be pulled out. The forward inertia rushed to get injured immediately.

Therefore, in the Central Plains, infantry often rely on solving problems.

Of course, cement is not omnipotent.

Your label is not enough, your production process is not good, your proportion is not good, etc., which can easily cause quality damage.

This is the case with the famous tofu project.

The most serious thing is that in important projects, such as flood control embankments, there should be steel skeletons in the cement embankments, but as a result, straw poles are used to replace cowhides for you?

Liu Mingqi is studying physics, and of course, it is a cleaner for the performance and compressive resistance of cement.

To put it bluntly, the better the cement, the stronger its unit pressure resistance should be. After stirring and laying the foundation, the longer it will remain hard during the hardening period.

There are a total of fourteen levels of cement pavement standards in my country.

C30 is the fourth level.

The third-level C25 concrete can already cope with normal pouring pavement, which is the street along the road we usually walk on.

C30 is a normal car lane in the city. Not only does such a car lane have a large number of cars crushed every day, but it must be able to withstand that kind of dirt truck. Of course, the crushing of slag trucks is not anytime and anywhere.

In this ancient times, of course, there were no large trucks worth dozens of tons passing by, so the C30 was definitely enough.

As for why you don’t use the C25 that is easier and more usable, it is that Liu Mingqi was influenced by Qin Zhidao.

There is no reason why my ancestors could make Qin Zhidao. I, a PhD in Physics and Chemistry who came back from modern times, do that kind of project that cut corners!

I have to start with C30, and at least they have to use it for a hundred years without any bad luck or revealing pitfalls in order to show my ability!

A hundred years later, let’s talk about it when the car is developed!

Anyway, cement at that time could already meet the highest standards.

...

Emperor Jing He walked over, looked at the concrete piles that had been broken into pieces, and then looked at the piles of bags next to Liu Mingqi.

He even opened it and took a look, but found that it was either powder, river sand, or stone.

"What does it mean?" the emperor asked very directly, "Don't tell me, just these things, mixed together, can they become so hard in this stake?"

"certainly!"

Liu Mingqi said first: "Your Majesty, you read it right. I came here today to open my eyes! The benefits of this cement are definitely not just about being strong and durable."

While speaking, he ordered a group of guards next to him to bring dozens of buckets of water. After coordinating in a series of proportions, he asked the guards to start mixing on the spot.

The modern method is still used. First, use river sand to build a chimney, then pour in cement and start mixing and stirring. When the stirring reaches a certain level, add small stones and stir again.

After the stirring is finished, pour the cement into the prepared tank and spread it flat.

The work of laying down and scraping is done by Liu Mingqi himself.

An official from the Sixth Ministry laughed behind him, "If Prince Yu does not become a prince and becomes a dirtmaker, he will be qualified."

Feng Yuqiang, a senator of the Hanlin Academy, heard this and turned around and glared at the man fiercely. He was so scared that he was trembling all over and quickly lowered his head and said nothing.

Because someone helped, the whole process only lasted half an hour before it was completed.

The emperor looked at such a square trough model, estimated it, and said, "Is that okay?"

"Yes."

Liu Mingqi said: "After cement is mixed with these things, the raw materials become concrete. Except for the fact that this concrete cannot be directly made in rainy and snowy weather, it can be done in any other weather. If it is placed in hot weather, it can completely pass the solidification period in about three hours and enter the hardening period... It is what it is now."

He pointed to the concrete pile.

"Three hours?" Ge Songdao was shocked immediately, "Your Highness, you are right? In just three hours, it can solidify into such an extremely hard stake!?"

"certainly!"

Liu Mingqi nodded and said, "But it's a cold winter now, it should take a little longer... Well, you can see it tomorrow morning and you will definitely be able to do it!"

"It's okay tomorrow morning!" Ge Song said, "It's only seven or eight hours. In such a short time, this... the ground made of concrete can solidify and become hard. That's a great thing!"

In order to make Guizhou better, the first road he built was in the mountainous area of ​​Guizhou. It was so hard and extremely difficult at that time!

In just a dozen miles, Gesong Road was repaired for more than three months, and it would take another repair in two or three years.

It was also after that he had great experience that Ge Songdao had quite some experience in building roads in Guizhou, Sichuan and Xikang.

But he never thought that he could completely harden the road that was so strong that it could be used in less than a day!

And this degree of firmness is beyond people's imagination!

It's just like a straight road!

If this is the case, it will be of great benefit to Quan Dakang!

Now the foundation of Dakang's rule is at the three levels of provinces, prefectures and counties. If you walk further to the town, you will often have some strength.

Therefore, in the countryside, it is mainly managed by the old gentry.

This is definitely not good.

But if you want to have all the jurisdiction, you have to recruit more yamen staff, which is too heavy for this part.

If Liu Mingqi's concrete can lead to a highway to every town, it will be extremely convenient whether it is communication or buying and selling things!

The supplies and trade in the entire rural area were revitalized in an instant!

This was not only thought of by Ge Songdao, but also by the big guys present.

Their eyes looked at Liu Mingqi, and they looked more and more expectant.

Liu Mingqi still dares to guarantee the cement, "Don't be impatient, whether it can be done or not, you will know at first glance tomorrow morning... But although it will be molded and hardened tomorrow, it is best to use it formally after three or five days."

"It's okay, it's okay!" Ge Song said, rubbing his hands, "What's the matter for a few days? If it's really so powerful, it doesn't matter if we wait for ten days!

Your Highness, do you know? If your cement is successful, it means that we can use 180 people to build roads in villages and towns across the country, and even spread the concrete floor directly into Zhongjing City in Shiwei!”

Liu Mingqi quickly shook her hand: "Ge Xiang, you are exaggerating! Although there is no manpower to stir and lay, the previous leveling, development, sorting, and logistics support along the way all require a lot of manpower!"

"There are more times when building straight roads?" Feng Yuqiang said: "When building straight roads, Emperor Taizu and Emperor Taizong took millions of people and took more than ten or twenty years to finally build straight roads across the country. Your Highness, you may be able to complete the laying standards and time with your plan, and you may be able to complete it in three years, right?"

"If we can be assigned to each prefecture and let them do it themselves, the time will be faster." Cao Yi made this suggestion, "It will probably be done in one year!"

"Haha, where is the money?" Nangong Ji couldn't help but remind everyone, "We have no money at all now. How can we hire people, buy raw materials, etc. to build roads?"

"So you have to make a long-term plan!"

The emperor also said this when he heard this.

A penny stumps heroes.

After fighting in Dakang for more than half a year, he consumed the income brought by the bumper harvest this year and spent all his last little foundation.

The matter of road construction is originally very complicated and requires manpower and material resources. It requires a huge and detailed plan, so there is no way to rush to do it.

But even the emperor is very happy now while being cautious.

Dakang's finances are not good this year and will not be able to calm down next year, but it will be fine in three to five years.

At that time, the concrete road made of cement was promoted throughout the world, and the entire Dakang formed a spider web of a road, which was very convenient for the various actions of the court.

As for whether they suspected that Liu Mingqi had exaggerated the words...

Honestly, no!

A saint, a number one genius in the world, can he lie on such a huge thing?
Chapter completed!