In other words, this cement road can be roughly divided into two kinds, one is a pure concrete road without adding steel bars, and the other is a steel road with steel bars.

These two types of roads, in comparison, are naturally better than concrete roads mixed with reinforced steel, because they are stronger and can withstand greater loads.

However, considering that the land transportation facilities in the Ming Dynasty are not particularly heavy, even if it is a cement road without steel bars, Liu Renyu considered the cost problem and decided to build an ordinary cement road without steel bars.

According to Liu Renyu's wishes, the technicians of the cement factory transported several hand mixer trucks made of hardwood, as well as cement, sand and gravel and other raw materials, to the left side of the west gate of Jingbian Fort.

Then these technicians instructed the people to mix water, cement and sand and gravel in proportion, and mix them evenly to get enough raw materials first.

When the concrete road is laid, the whole road is not paved at one time, the technicians divide the road into two parts, left and right, first lay the left half of the 3-meter-wide road section during construction, and wait for the left 3-meter-wide road section to be paved, and then pave the right 3-meter-wide road section.

When laying a section of the road 3 meters wide on the right, take into account the heat. The effect of expansion and contraction, in order to avoid the relaxation of particles in the material when the weather is hot, resulting in extrusion, so that the pavement is slightly raised, so there is an inch of gap between each section of cement pavement.

According to the data obtained from Liu Renyu, the technicians asked the people to pour cement in the order of 6 meters in the order of 1 meter section, and then use 1-inch thick wooden planks to separate them, and then pour another section of the road.

After the people paved a section of road 6 meters long and 3 meters wide, there were special technicians to smooth the cement road as much as possible.

Once the technicians have leveled the cement pavement, the next step is to wait for the cement to dry.

If you want the cement to dry quickly, you need the help of good weather.

It is said that the weather in northern Shaanxi at this time, since the apocalypse, is drought and little rain, and the sun stays in the sky for a very sufficient time, so although it is still March, it is also warm and sunny, and the wind is beautiful.

Therefore, according to such a good weather, the cement can be dried within two days at the latest, and before the cement dries, the technicians of the Jingbianbao Cement Manufacturing Institute also instructed the people to replenish the cement twice, so as to prevent it from drying out.

After doing these tasks, the next thing that needs to be done is to prevent the cement from being trampled before it dries, in this regard, Liu Renjie is not worried that the people of Jingbian Fort will come to the road to step on it, he is just worried that animals such as cats and dogs will run coldly and press a few plum blossom piles.

It was Liu Renjie who ordered the security chiefs to strictly prevent cats and dogs from entering the cement road and stepping on it.

Seeing that Liu Renjie was a little worried that cats and dogs would make trouble, one of the security chiefs in Jingbian Fort kindly reminded the general: "Second Master Liu, you used to be a person from Jingbian Fort and have been suffering from famine in the past few years, do you know?" ”

"Naturally, I know that there are tragedies of cannibalism in some places." When Liu Renjie thought of this, he couldn't help but think of his grandfather and remembered that tragic past.

And when he thought of his great and poor grandfather, he couldn't help but sigh to himself: "Grandpa, if you were still alive, you would enjoy endless wealth and glory, alas! ”

"Second master, do you have a grandfather?" Seeing that Liu Renjie said something like grandfather, the chief asked curiously.

"Yes, but his old man has passed away." Liu Renjie said in a low tone.

"Yo, I'm sorry, second master, the villain shouldn't ask." Seeing that he accidentally touched Liu Renjie's sore spot, the chief quickly fell and said sorry.

"It's okay, what do you want to say, go on." Liu Renjie remembered his grandfather, shook his head violently, concentrated his attention, and continued to devote himself to the matter in front of him.

"Second master, what the villain means is that the hungry here are about to eat people, and those cats and dogs are all living creatures, so naturally they are all eaten clean by the hungry people. Moreover, not to mention cats and dogs, even the rats have been taken and eaten. So, second master, no cats and dogs will come to the cement road here in Jingbian Fort anyway. The chief said firmly.

"What you said is still very reasonable, but it's always good to be careful, you still have to keep an eye on it, this is the road that our family has to use when they get married, if there is a little bit of a mistake, I'm afraid I can't afford it." Liu Renjie solemnly reminded the group of chief guards.

"Yes, yes, the second master, the villain and others know." Seeing that Liu Renjie couldn't afford it, the security chiefs knew that the matter was not trivial, so they sent people to work in two shifts, day and night, to take turns to take care of the cement road that had been paved.

In addition to sending people to take care of the cement roads that have already been paved, Liu Renjie naturally has to dispatch people to build new cement roads.

In this way, before the new cement road is built, the old cement road has been completely dried up, and the hardness is not inferior to that of stone.

Seeing this scene, Liu Renjie, who had already heard of the magic of cement, didn't think it was a very strange thing, but those people didn't think so, they were stunned when they saw that mud could turn into stone, and felt that such an incredible phenomenon was completely beyond their cognition.

Those people who built cement roads naturally didn't know the mystery of cement, so when they found out that Liu Renyu actually used thin mud to build roads, they all felt sorry for Liu Renyu to arrive.

Because the people think that Liu Renyu is a good person and a good official, but God is jealous of talents, such a good official has a problem with his brain, and he uses thin mud to build roads, which is a clear waste of money.

They thought that the road construction project would end in a farce, because it was impossible to build the road with mud, but in the end, when the concrete road was completed, they were all shocked by what they saw, and they were surprised to find that the mud had finally dried up, and it was still very hard and smooth.

This phenomenon makes the people very confused, and they can't find the corresponding knowledge to explain this phenomenon from their own minds, so they can only explain it like this: "Lord Liu is really a god and a man, and he is a bit of a clay into stone." ”

The older people explained by miracles what they could not understand.

Compared with the older people, although the children do not know the subtleties of cement, they find fun in the construction of concrete roads.

After school, when the children in Jingbian Fort were bored, they gathered together in groups of three or five with great interest and watched the adults build the road with great interest.

At first, the children saw that the adults did not use the traditional Chinese technique of ramming earth to build roads, but used thin mud, and they all thought that the adults were afraid that they were just afraid that there was a problem with their brains, and they did not build the road well, but they played with the mud.

When the concrete road was completely repaired, they were amazed to find that the mud had turned to stone, and then the children ran up and jumped on the concrete road in amazement.

Soon, most of them quickly put aside the question of why mud turned to stone, and began to play the game of hoop rolling, after all, the concrete road is very smooth, and it is more fun to roll hoops.

Of course, this kind of behavior will be stopped by Liu Renjie, because this cement road was dedicated to Liu Renyu when he got married, and it cannot be used at any other time except for April 18.

Children are deprived of the right to play on the concrete road, and they can only watch the concrete road drool.

And some children who are very curious about learning are different from other playful children, and they have a strong desire to learn and ask their teachers, why can mud be turned into stones?

The teachers in Jingbianbao School are all standard liberal arts students who are familiar with the Confucian and Mencian classics, how can they understand these things, so the teachers all educate their students with a strong desire for knowledge in this way: "What do you know about such kitsch and lewd skills? In my Ming Dynasty, I am familiar with the hundred classics, and taking the imperial examination is the right way. ”

With a single sentence, the faculty members extinguished most of the students' interest in the natural sciences with a strong desire for knowledge.

This incident was then learned by the instructors stationed in the school, and then reported to Liu Renyu, who was still digging a pit in Liujiabao.

After listening to the words of the veterans stationed in the school, Liu Renyu first sighed that I Daming actually has the seedlings of science and engineering, and then he began to think about the education problems in the area under his rule in the future.

At present, what is being carried out in Liu Renyu's control area is still the traditional ancient education, or the study of the sage classics, and the interpretation of the sage classics, which is obviously not in line with his idea of building a modern industrial democratic and free country, so he needs to reform. The education system should not only introduce language and physical education classes in primary schools, but also other subjects.

Liu Renyu has a heart in mind to reform. The education system, but this matter is not the focus at the moment, because it has entered April, and the cement road in Jingbian Fort has been almost repaired, and the progress of Liujiabao can be described as far behind.

At this time, Yang Desheng, Zhang Tieniu and other people had finished the repair period, and Liu Renyu called all his men and horses to the construction site of Liujiabao to help him dig the foundation of the city wall.

Liu Renyu led his subordinates and more than 10,000 people to dig the foundation of Liujiabao for 20 days, and only one-third of the progress was completed.

The foundation has not yet been dug up, and his wedding date is approaching.

In desperation, Liu Renyu had no choice but to put down the civil work at hand, return to Jingbian Fort with his subordinates, and began to prepare for his marriage.

On April 14 of the third year of Chongzhen, there were still four days before Liu Renyu got married, and on this day Liu Renyu returned to Jingbianbao from the Liujiabao construction site, and then took his subordinates to inspect the cement road that had been completed.

Liu Renyu and a group of people rode horses to enter through the west gate of Jingbian Fort, passed through the hole in the city gate, and stepped on the cement road that had been built.

When Liu Renyu stepped on the cement road, he rode his horse and galloped, while carefully looking at the first cement road of the Ming Dynasty, only to see that the cement road was two feet wide, the color was gray and white, and the ground was relatively flat, which was relatively similar to the cement road in later generations.

For this construction quality, Liu Renyu is quite satisfied.

And all the generals around Lord Liu were the first to see the cement road, so they were completely shocked by this magical road under their feet.

"Hey, my lord, this cement is really magically tight, I don't know how, the mud turns to stone, it's so hard, it's so fucking cool to run." Zhang Tieniu looked at the smooth road surface on the ground and couldn't help but be amazed.

"My lord, this road is really good, if it is a general dirt road, it rains, let the rain soak, the whole road has become a yellow mud pond, walking, walking horses are not cool, your cement road is not like this, it is windy and rainy, and the feet are not muddy when walking." Huobao Sun Wuxian also sighed.

The rest of the generals were also full of praise for the cement road.

Liu Renyu listened to the words of his subordinates, and just smiled slightly, after all, they were all ancient people, and they had never seen such things, so they were shocked, which was normal.

Such a group of generals galloped happily on the cement road, feeling the convenience of the cement road, but at the same time, Liu Renyu found that there was no pedestrian on the repaired cement road except for them, and he was a little puzzled.

When Liu Renyu ran to the door of his garrison mansion, he saw Liu Renjie who greeted him, so he asked the other party: "Renjie, the road has been repaired, why don't you see anyone walking on the road?" ”

"My lord, this road is what you need to use when you get married, how can you use it now, if the people step on it, there is no way to explain it to you." Liu Renjie replied seriously.

"Hey, Renjie, you don't have to be so careful. When a road is built, it is for people to use, and if it is not used, it is useless to build it. This is a main road, you always do not let the people use it, it is not convenient for the people, and even if I want to use it when I get married, I only need to clean it a little on the day of marriage, so you immediately go to inform the people in the fort that this road can be used with confidence. ”

"Yes, sir. Let's go. ”

Liu Renjie got the order, and when he was about to walk away, Liu Renyufu said again: "After you go to finish this matter, hurry up and call your Uncle Ma to me, I want to have a meeting." ”

"Yes, sir. The lowly knows it. Liu Renjie got the order and left.