Hongwu Survival Guide

Chapter 292 Precast Panels

After finishing the cement, the first thing to do is to prefabricate the board.

Compared with the wooden beam structure houses that were not airtight enough to prevent insects and rodents in this era, with prefabricated panels, bungalows and even buildings can be built.

The latter is not in a hurry. Although the best cement I have seen right now can't be broken with a heavy hammer, compared with later... there is no reference.

Only take your time.

After seeing the samples, everyone went back to the house, turned to the small meeting room arranged by Zhu Yuan on the west side, and found paper and pens. While Zhu Yuan was drawing, he explained to Shan Anren, Song Lian and Shen Quan standing beside him: " This prefabricated panel, the word 'prefabricated', is easy to understand, it is a building panel that is made in advance and can be used directly, and its use is similar to our current beams, but unlike beams, this panel can be directly laid on the roof."

Having said that, Zhu Yuan has already drawn the general shape of the prefabricated panel with charcoal, and also marked the approximate length and width data: "The completely selfish prefabricated panel is very heavy, and may also cause its own strength to decrease. Therefore, it is necessary to do It has holes. You need to think about how to complete this kind of perforation. For example, if you think about it for a while, find a few iron pipes, put them on when pouring, and pull out the iron pipes after pouring. Don’t use wood, it should stick In addition, it is the steel bars in the prefabricated slab. This may be a bit expensive, but it is also necessary. It is equivalent to the bones of the prefabricated slab. Besides the length and width, this also needs to be tested by you. I think the length is one foot, and the width is one and a half feet. Thickness...between three and five inches, in short, make more, and in the future, like today, strength tests will be carried out, and whichever is better will be used."

When Zhu Yuan said this, Shen Quan glanced at Shan Anren beside him, paused for a while, and said: "My lord, my officer... I said it outside before, this... cement mixed with gravel is not as good as that." The ones mixed with crushed stones may be stronger, so if we make this prefabricated panel, can we also mix some crushed stones into it?"

"Of course," Zhu Yuan said, "Cement is just a material, and when cement is mixed with other materials such as sand and gravel, it is called concrete. Well, I couldn't think of the reason for it for a while, but the strength may indeed be higher. This It is also what you need to study carefully in the future, which ratio of cement and sand is stronger, so that we can find the best solution."

Shen Quan carefully wrote it down, and did not forget to respond: "Thank you, sir, for your reminder."

"Oh, don't need to talk about this," Zhu Yuan smiled, keeping the charcoal pencil in his hand, and continued: "The prefabricated board is made to build a house... Well, I remembered, the way the prefabricated board is tiled, If the treatment is not good, it is easy to leak, so the upper floor is often built with a traditional tile roof, which is an extra layer of protection. However, this is what happens later.”

As he spoke, he still drew the bungalows casually, and then said: "Compared with our current traditional brick-and-wood-beam structure houses, brick-stone-and-concrete buildings are not only stronger, but also fire-proof, insect-proof, rat-proof, etc. Even better. In addition, it is possible to build multi-storey buildings. One day in the future...maybe not too far away. If our generation works harder, it will not be a problem to build some [-]-[-] feet high buildings.”

A building twenty or thirty feet high?

Song Lian on Zhu Yuan's left immediately thought of Li Taibai's poem.

Don't dare to speak loudly, for fear of shocking the heavens.

Ok.

That is nothing more than a 'dangerous building a hundred feet high'.

hundred feet...

Only ten feet.

Shan Anren felt that he couldn't imagine it: "My lord, it's twenty or thirty feet tall... This, even if it is real, it will take a lot of time to live in, and it will take a lot of time to come and go. Moreover, in life, I'm afraid there will be a lot of inconvenience. How about this?" solve?"

"This is the problem we will study in the future," Zhu Yuan said, "Maybe you can't imagine it, but everyone, you may not know that our current world, outside of China...in many places, there are 3 to [-] people. A city, that is, a big city, if it has a level of [-], in their view, it is already a big deal. And we, as early as a thousand years ago, already had a super city with a population of one million. A city with a population of one million, of which There are so many problems that need to be dealt with, and we have done it all, and then think about a building that is [-] to [-] feet high, how can we not solve it?"

Shan Anren felt that his knowledge had increased: "What Pingzhang said... is very true."

Seeing that the people around him were still curious, since the topic was opened, Zhu Yuan simply said a few more words, sketched the outline of a building with a height of [-] to [-] feet, and said: "A building, in fact, what needs to be solved is how many Things, water and fire, sanitation, up and down... Among them, the first two can be solved with only one method, two words: pipes. All kinds of pipes send water and fire up and dirt down. As for up and down In addition to the stairs, we can also design some machinery...well, probably this kind of thing."

Then he sketched a simple external elevator.

Shen Quan saw that the other two adults were thinking, so he asked: "My lord, use pipes to send water, or...others, the lower officials can understand, how can this...fire be delivered?"

Zhu Yuan said: "We are burning firewood now, which is only the most primitive use of energy. Next, the large-scale use of coal is only a relatively elementary stage of energy utilization. In the future, have you ever thought that we can burn energy The oil or gas is sent to the people’s homes through pipelines, and the people can use it directly whether they are cooking or heating?”

This time, the three of them understood.

Zhu Yuan smiled: "Besides, this is still relatively elementary. The energy we will use in the future... Everyone has seen it before. Have you ever thought about the reason for the lightning in the sky on a rainy day?"

This……

Thunder God, Lightning Mother.

The power of the gods.

Who dares to think?
Shan Anren and Song Lian looked at each other, with doubts and expectations in their expressions, feeling that they touched something extraordinary?
Now that he talked about it, Zhu Yuan didn't keep it up: "The principle of lightning is that when the dark clouds collide in the sky, there is a discharge reaction, and the thunder is also produced because of this. Heh... Let me tell you one, three, have you ever thought about it?" , Why do we always see the lightning before hearing the thunder in thunderstorm weather?"

Song Lian was about to speak immediately.

Not only "Economics", the textbooks that Zhu Yuan sent to Lao Zhu for review have recently been printed and distributed to students of various majors.

As the editor-in-chief of "Daming Monthly", Song Lian was also able to browse some in advance, and felt that he gained a lot of insight.

Just say this light and sound.

It seems to be... sound... No, it's light... It travels faster than that sound.

However, seeing the confused appearance of the other two, Song Lian, who does not lack emotional intelligence, simply pretended not to know, and gave the other party the knowledge he had originally learned from the young Pingzhang.

Zhu Yuan followed suit and said, "The reason is very simple. It is because the speed of light travels far faster than that of sound. When sound travels in the air, one second... well, it is an instant of one-ten-thousandth of an hour. Only one The distance of about a hundred feet, and the speed of light, can travel 60 miles in the same instant, which is probably...the earth we are on has a circumference of 8 miles, and light can travel nearly 8 times in an instant.”

Song Lian, who already knew similar knowledge, still felt novelty listening to it now.

Shan Anren is too busy in his daily life. Even though the Minister of the Ministry of Industry of the second grade has full authority to access various teaching materials, he has no time these days. He just took the time to study the "Production Chapter" of "Economics".

Not to mention Shen Quan.

Therefore, the two were in a daze with shock and doubt.

Dazed is... I don't understand.

Feelings have gone beyond cognition.

The shock is, that light, does it really run so fast?

In comparison, that voice is so slow?

I don't feel this way on weekdays.

The doubt is...even if you already know the identity of a certain young Pingzhang as an extraterrestrial expert, and have seen the other party's many feats, it is still difficult to understand at the moment. These...how did the other party know?
Zhu Yuan said briefly, and stopped rambling endlessly, and instead said: "Generally speaking, the level of our human civilization can actually be divided by the use of energy. In the long agricultural era, our daily The main energy of life comes from firewood, which is very low-level. Next, only when more efficient coal is widely used, can we enter the industrial age. But, after that, there are many other energy sources. For example, thunderstorms The kind of electric energy that appears in the sky, and the oil buried in the ground with coal contributes to more efficient chemical energy. Even... higher levels, huh, I won’t talk about it for the time being.”

No matter how high it is, it is nuclear energy.

This matter was explained to Lao Zhu.

At first, Lao Zhu felt that something that could destroy the world should not be made, so Zhu Yuan once again convinced his ancestors.

It must be made.

why?
Because, the sun is there!

If we don't create it, sooner or later, others will look up at the sky and think about the origin of the sun, and maybe they will discover the secret.

Then, if an outsider creates it in advance... the result will be difficult to predict.

I chatted a little casually, but I still want to come back to the present.

Rice still needs to be eaten bite by bite.

Zhu Yuan asked several other people to sit down and discuss, in addition to confirming the trial production of prefabricated panels, there is also the expansion of the scale of the cement workshop.

Because there is no rush to promote, the scale does not need to be too large.

After learning about the details from Shen Quan, several people quickly came to the result. The number of craftsmen in the cement workshop has increased from less than 80 to 200. Next, they only need to make 10 to 20 catties of cement that can be used every month. Cement is enough, that is, the level of [-] tons to [-] tons given by Zhu Yuan to convert the new standard.

200 people produce [-] to [-] tons of cement a month, and after hundreds of years, it may become a joke.

Now, that's the level of productivity.

The main reason is that it is not planned to be widely used for the time being. After all, it is too expensive to burn cement now. Not to mention that the workshop itself plans to increase to 200 people. In fact, the entire Ministry of Industry is involved in providing fuel, stone, and slag for the workshop. etc.

Furthermore, the cement produced will mainly be used for pouring prefabricated slabs, and a batch of walls will be approved at most, instead of the later construction that uses a large proportion of concrete.

Therefore, [-] to [-] tons of cement per month is enough.

Still have to wait for the steam engine.

Think of a large steam engine with hundreds of horsepower used for crushing operations, compared with the current manual grinding, one is in the sky and the other is underground.

At the end of the discussion, it was about asking Lao Zhu for credit tomorrow.

With Zhu Yuan as a staff member, enumerating the various benefits of cement and its wide range of uses in the future, coupled with Song Lian's embellishment, a draft memorial was quickly completed.

When all these were finished, the time has come to Shen Zheng in a blink of an eye.

Four o'clock in the afternoon.

The three of them all knew that Zhu Yuan was weak, and they apologized repeatedly for delaying someone's rest today, so they said goodbye together.

(End of this chapter)