Tang Dynasty good husband

Chapter 129

A bag of blue-gray powder was placed in the yard of the Cheng family, and some craftsmen still had some cement on them. Everyone was puzzled about this kind of thing.

Qin Chao squatted down and stretched out his hands to grab a handful of cement. He could vaguely feel that there were still some hard lumps in the cement that had not been ground.

The color of the cement is obviously yellow-gray, and the yellow overshadows the gray, which is very different from the cement Qin Chao has seen in later generations.

Qin Chao only knows that cement is made of limestone, clay and gypsum, but he doesn't know the specific production method.

Therefore, Qin Chao has no way to provide the craftsmen with specific production methods. He can only put forward his own requirements, let them experiment a little bit, and then bring the experimental products to himself to be firm.

However, Qin Chao is not a professional after all, and he can't be sure of the quality of cement just by naked eyes, and things like cement, what he sees in his eyes may not be real.

Qin Chao shook his head helplessly. Although he didn't know much about cement, Qin Chao knew very well that this was not the cement he wanted.

"What's the ratio this time?" Qin Chao looked up at the craftsman and asked.

"All materials are equal." The craftsman responded truthfully.

"After going back, it will be re-fired. The ratio is limestone, clay, gypsum, 2 to 1 to 1, 3 to 1 to 1, 3 to 2 to 1. In short, the amount of limestone is the largest, and the other two can be used in different ratios. Configure the firing, and remember the detailed ratio of each batch, and make a few more batches to see." Qin Chao ordered.

The craftsman hesitated a little, first glanced at Cheng Chumo, and after seeing Cheng Chumo nodded, he agreed.

He didn't know what this thing was for, and he didn't want to know, anyway, the Cheng family paid for it, so it didn't matter whether the thing was completed or not, as long as the Cheng family paid for it.

However, Qin Chao's instructions made it clear that he was required to make a few more batches. Without the approval of the Cheng family, the craftsmen would never have done it. After all, it was not Qin Chao who gave the money.

"Brother, the cement this time can't be used?" After the craftsman left, Cheng Chumo stepped forward and grabbed a handful of cement. He looked at it carefully for a long time. Except for feeling a burning sensation in his hand, he didn't see any problems.

"It's not that it can't be used, but the quality is definitely not the best. I don't know how long this kind of cement can last, but we still have time to test several different ratios at a time, and we should be able to find the best ratio. Yes." Qin Chao explained patiently.

He has already figured it out. There are no useless people in this world. Although the world looks down on workers and businessmen, the development of this era is driven by workers and businessmen. Scholars will only take care of their own interests after a long time. They don't think about change, they don't have this kind of thinking at all, which is why the previous dynasties perished after passing through their heyday.

Farmers are honest and honest, as long as they can have enough to eat, they are willing to be little prostitutes in a peaceful and prosperous age. This kind of situation is exactly what scholars are happy to see.

Although it is beneficial to rule, it is not conducive to the development of the country's national society.

No matter whether Cheng Chumo will inherit the title of Duke in the future, or whether Cheng Yaojin will refuse Cheng Chumo to contact this industry, at least for now Qin Chao must bring him into this industry.

To have such a high potential and not use it is an utter sin.

Besides, for Cheng Chumo, this choice was not the worst.

When one's own ability reaches a certain level, one can open doors widely and accept disciples to teach, and then the world will be full of peaches and plums. Isn't this a way out?
"Maybe the poor quality is not due to the proportioning, or it may be due to limestone or clay and gypsum?" Cheng Chumo questioned.

In this regard, Cheng Chumo feels that his interest is obviously higher than that of being an official, but Cheng Chumo has always suppressed his interest and hobbies, and has never dared to show it, that is, now there is Qin Chao as a shield Only then did Cheng Chumo dare to indulge a little.

"That possibility does exist, but experimentation is boring. Before negating all possibilities, it is better not to change the raw material for the time being, unless you can be sure that the problem is the raw material.

This is like the rammed earth wall. At the earliest time, people just used soil mixed with water to make the wall. After a long time, they found that this kind of wall was not reliable.

So I thought of adding hay to the soil, but before adding hay, who can guarantee that our ancestors have not tried adding other things to it?
Later, it was discovered that although this kind of wall was strong and durable, various insects always appeared in the wall.

As time goes by, the walls are hollowed out.So there is mellow soil to replace ordinary soil, but other things remain unchanged.

This is the rammed earth wall we are using now, whether it is cement or other things, it is the same reason.

What we are doing now is just to discover the problems through experiments and then improve them. By the time it is launched for use, we will try our best to make it as perfect as possible without having to worry about it. "Qin Chao began to give examples.

This example is not advanced, but it is very suitable for enlightenment, let Cheng Chumo know that everything has its own reason, but there is a big problem in wanting to exist alone. Continuous improvement to get the best things.

"Now you mix cement, sand, and gypsum into mud in different proportions and test the effects of different proportions." Qin Chao continued.

He does not intend to do it himself, it is also a process of practice. Although the cement this time is not up to standard, the proportion of the silt and sand needs to be studied. It is very suitable for Qin Chao to entrust it to Cheng Chumo. of.

And Qin Chao had someone dig a few small holes on the ground about one foot deep and half a foot wide.

After mixing the ink at the waiting distance, pour the mixed mud directly into the small pit. The mud prepared according to different proportions can show different effects, some obviously have too much water, and some are too dry Hard, but there is also one that looks just right.

The next thing to do is to wait for the cement to dry out, and then take it out to test the hardness, which is also the ultimate test method to test the quality of the cement.

"Brother, what's the situation with your hand-pressed well? I tried to do some myself, but I couldn't get the water out every time." Although it was just mixing mud, Cheng Chumo was still very excited about it. After finishing, he asked Qin Chao quietly.

He was very curious about the pumping device for hand-pressed wells, and even secretly dismantled a set of hand-pressed wells, but no matter what he did with such a simple device, he couldn't extract water from a normal well.

"Hand-pressed wells use the principle of pressure..." Qin Chao told Cheng Chumo the principle of hand-pressed wells. Although Qin Chao didn't know much about it, it was undeniable that Qin Chao's knowledge was used to teach Cheng Chumo is still enough.

(End of this chapter)