Three Kingdoms, at the beginning of the game, recognize the thief as the father, hit the spectacle,

Seeing this, Zhang Yan didn't stay idle either. While ordering the other party to light the fire, he grabbed the two people beside him, and the three of them walked towards the mud kiln together, intending to directly supervise the production of the first batch of cement. Calcination works.

"boom--"

The flames stimulated by the spirits are constantly rolling and gushing in the mud kiln. Under the accumulation of a large amount of coal, even though Zhang Yan is more than ten meters away from the kiln entrance, he can still feel the constant waves of heat. Accompanied by a slight soot smoke hitting his cheek.

And those laborers who are responsible for filling the coal and blowing the air are even worse. Because the blowing is too fast, the heat will be lost too quickly. Therefore, in order to increase the temperature in the kiln, these people can only maintain a slow speed. The wind provides oxygen.

Almost every time the air pours in along the air vents, it will bring out a huge burning sensation, which makes these workers sweat profusely in the early spring.

……

"Here, won't you get dehydrated if you go on like this?"

"Hey! You guys, come here!"

Frowning, he looked at the hard-working laborers not far away from him. Since the work Zhang Yan asked them to do today was extremely hard, he specially greeted these people in advance. There will be additional rewards waiting for them.

No one has trouble with money, especially those who have no property in their families and can only rely on coolies to make a living for the time being. Who wouldn't want to save some money early and buy a piece of land for themselves in Lujiang, which can be regarded as taking root?

Under the influence of such psychological factors, these workers naturally performed extremely hard.

It's just hard work, Zhang Yan naturally appreciates their all-out behavior, but he is not a vampire street lamp man, if these people fall ill or even get to the root of the disease due to overwork, it will not be worth the loss up.

Even though no one dislikes hardworking people, such a harsh working environment still makes him feel a little scared.

Just the streams of sweat streaming down those people's backs, each of which would make his brow twitch.

He waved his hand and called a few researchers from the Lujiang Science and Technology Department who were watching the excitement. Zhang Yan ordered them to prepare some warm salt water, ready to replenish water for the frontline workers anytime and anywhere.

On the other side, he didn't forget to tell the workers who watched the excitement to go up and replace a group of blower and filler workers every once in a while. Only then did he barely hold on and continue the calcination of cement.

Time continued to flow, and soon, the filling in the clay kiln was heated to a sufficient temperature, and the raging flames gradually subsided, leaving only a large amount of completely burning coal emitting a scorching red glow. Light.

Although judging from the momentum, the current mud kiln no longer has the intimidating feeling of being burned by flames before, but for some reason, everyone present always feels that the surrounding temperature has not dropped compared to before, but has risen a lot.

Even if you look directly at the scene inside the kiln with your naked eyes, no matter how far away you are, your eyes will feel a burst of stinging pain.

Regarding the knowledge of the cause of infrared rays and the change of radiation intensity with temperature, Zhang Yan naturally would not go to popular science with them.

Perhaps among the people present, Ma Jun could barely understand the fur, and Wei Xian could understand the general meaning he expressed, but the rest of the people counted as one, and these advanced knowledge might be as useless as seeing a wordless scripture. the difference.

But Zhang Yan doesn't need them to know so many things, as long as they can add fire and blow the wind, then there will naturally be specialized personnel to help them deal with the rest.

The temperature inside the kiln continued to rise, and when the overall temperature finally broke through the limit of 1000-[-] degrees Celsius, the limestone slag on the top layer began to soften and deform slightly, visible to the naked eye.

This is also a sign that the stone has entered the molten state.

Then, like flowing magma, when the stones in the entire furnace became red and hot, as if a certain play button was pressed, in an instant, a large amount of upper stones began to melt, forming a kind of The normal state of a liquid.

"Oh, it's done!"

Squinting his eyes and looking at the scene inside the kiln, Zhang Yan was overjoyed when he saw the limestone being burned, and a smile appeared on his face.

However, in order to be sure, he still kept the raw limestone in the molten state for nearly half an hour as recorded in "One Hundred Thousand Whys", and then he ordered to stop blowing the charcoal and let the kiln The temperature inside slowly dropped.

When the temperature in the furnace finally dropped, Zhang Yan obtained the first sample he had fired himself from the hands of the coolies.

Different from white lime fired only with limestone, after clay is added, the product fired from limestone, the so-called clinker, has a slight grayish-yellow color, and the whole is powder and gray-white crystal blocks with different shapes. one.

But soon, after crushing the sample with the small hammer sent by the laborers, the powder showed an appearance that Zhang Yan was very familiar with in his previous life.

Just looks like those bags of cement.

……

Chapter 42 The power of the group and a little insight

"My lord, is this cement?"

On the side, Ma Jun came forward curiously, reached out and grabbed a handful of samples, put them on the palm of his hand, and twisted them gently twice.

Although Wei Xian stood behind Zhang Yan and did not move, it can be seen from his eyes that he, who has been in the construction industry from Orion for more than a year, is also interested in this new type of building material that Zhang Yan talked about. Very curious.

Just turning around and looking at the two of them, the corners of Zhang Yan's mouth raised slightly, and then he shook his head.

"No, it's not."

"You have to add something to it."

After handing over the samples in the tray to the group of workers waiting at the side, Zhang Yan pointed to the hundreds of catties of clinker that had already been burned, and then pointed to the stone mill not far away, and ordered:

"This is just the burnt clinker. You can mix some gypsum into it later, grind them together, stir them, and grind them again. What you grind out is cement powder."

"This step is very fast, you can deal with it quickly, maybe we can catch up with lunch at noon without being delayed."

……

When this step is reached, that is, the last grinding of the cement after two grindings and one burning, it can no longer be simply hammered as before, but must be finely ground into fine powder.

Otherwise, the irregular crystallization movement of calcium silicate in water will not only affect the strength of cement, but may even cause very serious safety problems such as "slagging" and "cracking" of the generated cement stone.

And those people sang softly, then got up and left, and started a new round of work. Zhang Yan also stretched a little tiredly, then stood up from the room where he was waiting, and walked towards the door not far away. past.

……

"You two wait here. I'll go for a walk and I'll be back. Don't move around."

②0㈥eight㈤Lu○㈤③

……

Slowly wandering into the yard, Zhang Yan glanced behind him first, and saw a large group of tall and thick men working hard around the stone mill. It seemed that the things in the millstone were not cement powder and gypsum. But like their enemies.

Slightly amused, Zhang Yan didn't say much, and quietly walked outside the door, looked at the sky in the distance, and was dumbfounded.

……

"Heh, it looks pretty good, I'll reward myself with some wine at noon..."

……

He leaned against the door frame and sighed softly. To be honest, Zhang Yan's busy work this morning was relatively smooth.

He also looked at the clinker that was fired just now, and it must be incomparable to the cement produced by the industry in the later generations, but compared to the cement powder fired by hand in his previous life, it is so strong that he doesn't know where it is.

Just in the previous life, the dregs hammered out by my thin arms and legs could barely crystallize into suitable cement stones after spraying with a blowtorch for half an hour. Now this group of big men are hammered and burned. , definitely better than his previous works.

In addition, in addition to the process of making cement, things like the ratio of some raw materials, such as the ratio between limestone and clay, the ratio between the burned clinker and the gypsum added later, will actually affect the final product. Strength and properties of cement.

As long as these things are adjusted slowly later, several suitable ratios can be summed up in the end.

What this requires for the progress of science and technology is the accumulation of time, rather than a leap-forward breakthrough.

As for Zhang Yan, he only needs to wait for the first batch of cement that he personally arranged to be fired, and then test it before he can start arranging large-scale production and application.

As long as the strength of this kind of cement is not too bad, even as long as it has the level of "usable" strength, he can arrange this thing first.

Now the Mars field system in Lujiang... oh no, the construction of the Shennong Canal is still stuck in place. It needs the help of cement, a convenient, fast, easy-to-shape and easy-to-transport building material, to help the entire Lujiang field. Lay a large net to deal with the flood and drainage work of the entire Lujiang River during the rainy season in the future.

As for the optimal strength ratio, the optimal toughness ratio, etc., these only need to be handed over to the Science and Technology Department of Lujiang, and let them set up a "cement research group" alongside the "gunpowder research group" and "fertilizer research group". Carry out a lot of experiments to test out several different cement models.

Even Zhang Yan thought about it, this "cement research team" is the same as the "fertilizer research team", affiliated with the Chemical Research Institute of Lujiang Science and Technology Department, which is convenient for the two to exchange "conditions" anytime and anywhere. That is, the experience and progress of their respective experiments.

As for the difficulty of this kind of experiment, it can be said that it is not worth mentioning for the current technology department.

After all, this is just a lot of controlled experiments.Even if the experience of Ma Jun, the current head of the Science and Technology Department, is still focused on the improvement of gunpowder weapons, especially gunpowder itself, the remaining group of researchers still have enough ability to deal with these.

Perhaps this is why Zhang Yan established the Lujiang Science and Technology Department at the beginning. Since the first project established by the Lujiang Science and Technology Department was to conduct a large number of comparative experiments on fertilizer production and use, it is necessary to set up a large number of control experimental groups for this kind of experiment. The staff of the Science and Technology Department cannot be said to be slightly proficient in the work, they can only be said to be extremely good at it.

Or in other words, if you want to improve and improve all the inventions that have already been effective, Zhang Yan can safely hand them over to the current Lujiang Science and Technology Department.

This is the power of groups.

Zhang Yan has been enjoying this kind of dividend invisibly since the establishment of Lujiang Science and Technology Company.

……

Throughout the process of historical development, individuals in each group will exert their power and have sufficient influence on the development of history. This is the basis for the mass view of history.

But that great man also once said that the development of history is like a tug-of-war, some people are stronger and some people are weaker, this is a normal thing.

Those with greater strength exert more strength, and those with less strength exert less strength. This is a reality, and it cannot be questioned or denied.

If you ignore this point because of excessive denial of the "heroic view of history", that in itself is a kind of disrespect for the mass view of history.

After all, the hero is also part of the crowd.

The situation today is the same. The reason why Zhang Yan has these feelings now is precisely because he really felt that during the entire historical development of the Eastern Han Dynasty, during the same thing, such as the invention and improvement of cement, He indeed plays different roles with different people and plays different roles.

But just because he brought the cement production method to the Eastern Han Dynasty, can he deny the work of those who worked hard to help him produce and improve the cement ratio?

Certainly not.

From another perspective, it is also inappropriate to overemphasize the role of those people and deny Zhang Yan's role in this.

Although he had learned relevant knowledge and theories through various channels such as books and the Internet when he was young, it was the first time for Zhang Yan to actually empathize with him today.

Chapter 43 First samples

Don't talk much, just do what you say.

Soon, Zhang Yan called Ma Jun and told him the series of things that he thought of just now.

And Ma Jun just watched and recorded the whole process of cement firing and made a record, so after recalling it, he nodded towards Zhang Yan, agreed to this matter, and prepared for a while Arrange to recruit more manpower and arrange the experiment.

For example, the method of determining the strength of cement, he has not yet seen what concrete cement stone looks like, so there is no suitable method for the time being.

But if you want to come and wait a while, Zhang Yan will give him a demonstration, and then just record it.

On the other side, after half a day of hard work, the laborers finally delivered the first batch of ground cement powder.

……

"The prefect! The prefect...it's done, can you see if this works?"

……

A group of people hurriedly placed a large bag of off-white stone powder in front of Zhang Yan. Before he could take a closer look, the powder was blown into the air by a gust of wind. There was also a strange smell.

"Oh, done?"

"Let me be quiet, this... ahem!"

Quickly took two steps back and coughed, Zhang Yan's excited expression suddenly became a little apprehensive.