After getting the cement, the first thing to do is to precast the slabs.

Compared with the wooden beam structure houses in this era, which were not effective in terms of air tightness and insect and rodent resistance, with prefabricated panels, it was possible to build bungalows and even buildings.

The latter is not in a hurry, although the best cement seen at the moment cannot be smashed with a heavy hammer, but compared with the later...... No reference.

You can only take your time.

After seeing the sample, everyone returned to the house, turned to the small conference room arranged by Zhu Yuan on the west side, and found paper and pencils. ”

Saying this, Zhu Yuan has already drawn the general shape of the prefabricated board with charcoal, and also marked the approximate length and width data: "The completely selfish prefabricated board is very heavy, and it may also cause its own strength to be reduced, so it should be made with holes." How to complete this kind of perforation, you need to think about it yourself, for example, think a little, find a few iron pipes, put them on when pouring, and after the pouring is completed, the iron pipes will be pulled out. Don't use wood, it should stick. In addition, it is the steel bar in the prefabricated slab, which may be a little costly, but it is also necessary, which is equivalent to the bones of the prefabricated slab. Speaking of length and width, this also needs to be tested, I think, the length is one zhang and the width is one and a half feet, and the thickness is ...... Between three and five inches, in short, do more, and in the future, it will be similar to today, conduct strength tests, and use whichever scheme is better. ”

When Zhu Yuan said this, Shen Quan glanced at Shan Anren beside him, paused slightly, and said, "My lord, the lower official...... Outside before, I talked about it, this ...... The cement mixed with crushed stone is stronger than the one that is not mixed with crushed stone, and the strength is higher. ”

"Of course," Zhu Yuan said: "Cement is just a material, and after cement is mixed with other materials such as sand and gravel, it is called concrete, well, I can't think of the truth for a while, but the strength may indeed be higher." This is also what you will have to study carefully later, under which ratio of cement and sand and gravel is stronger, so that we can find the best solution. ”

Shen Quan took a careful note and did not forget to respond: "Master Xie mentions." ”

"Heh, there is no need to say this," Zhu Yuan smiled, the charcoal in his hand did not stop, and continued: "When the prefabricated board is made, it is to build a house...... Well, I remembered that the way the prefabricated slabs are tiled is not handled well and is easy to leak rain, so the upper layer often builds a traditional tile spire, which is considered an extra layer of protection. That's after that, though. ”

As he spoke, he casually described the later bungalows and followed: "Compared with our traditional brick and wood beam structure houses, brick and stone and concrete buildings are not only stronger, but also have better effects on fire prevention, insect prevention, and rat prevention." In addition, it is possible to build multiple floors, which will be ...... one day in the future Maybe it's not far off, if our generation works harder and builds some buildings twenty or thirty feet high, it won't be a problem. ”

Twenty or thirty feet tall building?

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

I dare not raise my voice, for fear of frightening the people in heaven.

Well.

That's just a 'dangerous building 100 feet high'.

100 feet......

It's only ten feet.

Shan Anren felt that he was also a little unimaginable: "My lord, twenty or thirty zhang high...... This, even if it is really there, it will take a lot of time for people to live in it, and it will take a lot of time to come next time, and in life, I am afraid that there are many inconveniences, how to solve this? ”

"This is the problem we are going to study in the future," Zhu Yuan said: "Maybe you can't imagine it, but, everyone, you may not know that our current world is outside of China...... In many places, a city of 20,000 or 30,000 people is a big city, and if there is a level of 100,000, in their opinion, it is already a great thing. And we, as early as a thousand years ago, already had a megacity with a population of one million. A city, a million people, there are too many problems that need to be dealt with, we have done it, and then think about a building twenty or thirty feet high, how can it not be solved? ”

Shan Anren felt insightful: "What Pingzhang said...... Oh, yes. ”

Seeing that a few people around him were still curious, since the topic was opened, Zhu Yuan simply said a few more words, casually described the appearance of a twenty or thirty zhang tall building, and said: "A building, in fact, there are several things to solve, water and fire, hygiene, up and down...... The first two of them, in fact, only need one way to solve, two words: pipe. All kinds of pipes, send water and fire up, and send dirt down. As for the problem of going up and down, in addition to the stairs, we can also design some mechanical ...... Well, that's probably it. ”

As he spoke, he described a simple external elevator.

Shen Quan saw the other two adults thinking about it, so he asked, "My lord, use the pipe to send water, or...... Otherwise, the lower officials can still understand, this is ...... Fire, how can it be delivered? ”

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

This time, all three of them understood.

Zhu Yuan smiled: "Moreover, this is still relatively rudimentary, and the energy we will use in the future ...... You've all seen it, on a rainy day, the lightning in the sky, have you ever thought about the reason? ”

This......

Lei Gong, electric mother.

The power of the gods.

Who would dare to think?

Shan Anren and Song Lian glanced at each other, there were doubts and expectations in their expressions, and they felt that they had touched something terrible?

Since he said it, Zhu Yuan didn't sell it anymore: "The principle of lightning is that when the dark clouds collide in the sky, the discharge reaction occurs, and the thunder is also generated because of this. Scold...... I'll give you another one, three, have you ever wondered why we always see lightning first and then hear thunder during thunderstorms? ”

Song Lian was about to speak almost immediately.

Not only "The Science of Economics", but also 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 had gained a lot of knowledge.

Just say the light and the sound.

It seems to be ...... Sound...... No, it's light...... Faster than the sound.

However, seeing the confused appearance of the other two, Song Lian, who did not lack emotional intelligence, simply pretended not to know, and handed over the knowledge he had obtained from the young man Pingzhang to the other party to explain.

Zhu Yuan also said: "The reason is very simple, because the speed of light propagation far exceeds that of sound. The sound travels through the air, a second...... Well, it is a moment of one-ten-thousandth of an hour, only about 100 zhang away, and the speed of light, in the same instant, can run 600,000 miles, which is about ...... The earth where we are located is 80,000 miles long, and it can run nearly 8 laps in a flash. ”

Song Lian, who already knows similar knowledge, still feels novel when he listens to it now.

Shan Anren is too busy every day, even if the Ministry of Industry Shangshu of Zheng Erpin has full permission to access all kinds of textbooks, he doesn't have time these days, but he just takes the time to study the 'production chapter' of "The Science of Economics".

Not to mention Shen Quan.

Therefore, the two were at a loss with shock and doubt.

Dazed is ...... I don't understand.

The feeling is beyond cognition.

The shock is, is that light, really running so fast?

In comparison, the sound is so slow?

I don't feel that way on weekdays.

Doubts are ...... Even if you already know the identity of a certain teenager Pingzhang, and you have seen many feats of the other party, it is still difficult to understand at the moment, these ...... How did the other party know?

Zhu Yuan said simply, and then he didn't go on endlessly, and said: "In general, the level of civilization of our human beings can actually be divided by the use of energy, and in the long agricultural era, the main energy source of our daily life comes from firewood, which is very low-level. Next, only the widespread use of more efficient coal will enter the industrial age. But, after that, there is the use of many other energy sources. For example, the kind of electricity that appears in the sky during a thunderstorm, and the oil that is buried in the ground along with coal, contribute more efficient chemical energy. and even ...... Higher levels, heh, that's not going to talk about it for now. ”

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

This matter was explained to Lao Zhu.

Lao Zhu felt at first that the kind of thing that could destroy the world should not be made, and Zhu Yuan persuaded his ancestors again.

It's going to be made.

Why?

Because, the sun, is there!

If we don't make it, sooner or later, someone else 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 a ...... in advance The outcome is difficult to predict.

Casual rambling, or back to the present.

The rice still has to be eaten one bite at a time.

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

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

Roughly learned the details from Shen Quan, and several people quickly came to the result, the number of craftsmen in the cement workshop has increased from less than 80 to 200 now, and then, as long as one to 20,000 catties of cement can be used every month, that is, Zhu Yuan gave the conversion of the new standard of 10 tons to 20 tons.

Two hundred people produce one or twenty tons of cement a month, and in a few hundred years, it may become a joke.

Now, that's the level of productivity.

The main reason is that it is not intended 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, to provide fuel, stone, slag and so on for the workshop.

In addition, the cement will be used mainly to pour prefabricated slabs, and at most a batch of walls will be batched, rather than the later construction of buildings that use large proportions of concrete.

Therefore, one or twenty tons of cement per month is enough.

I still have to wait for the steam engine.

Think of a large steam engine with hundreds of horsepower used for crushing operations, compared to today's manual grinding, one in the sky and one underground.

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

With Zhu Yuan as a staff officer, the various benefits of cement and the wide range of uses in the future, coupled with Song Lian's pen, a draft of the chapter was quickly completed.

When all this was said and done, time had 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 again and again for delaying someone's rest today, and said goodbye together.

(End of chapter)