Zhu Jingjing likes to hear new things from Zhang Yifan's side, and when she heard it at this time, she immediately asked with interest: "What kind of kiln is that?" ”

Others are also curious, because Zhang Yifan has never said this.

Hearing Zhu Jingjing's question, he didn't hide it, and replied with a smile: "Cement kiln!" ”

The raw materials of cement are limestone and clay, which happen to be available here in Liujia Village, and in the place where he chose to use water power.

Zhang Yifan plans to build a cement kiln here, and the calcined cement will be hammered with a hydraulic sledgehammer to save the most wasteful labor link.

However, to build a cement kiln, it is not so simple.

Even though Liujia Village is blessed with cement raw materials in a place suitable for water power by the river, many bricks are needed to build the kiln, and the core part even needs refractory bricks.

And the fuel, it's all trees, and the best thing to do is to burn it into charcoal first, which involves burning charcoal.

Because the temperature of cement calcination should reach about 1450 degrees, but ordinary wood burning can only reach about 850 degrees, but charcoal can reach a high temperature of 2700 degrees. Of course, these are only theoretical temperatures.

The high temperature that charcoal can produce depends on the amount of carbon in it, and the higher the carbon content, the higher the theoretical temperature that can be generated.

The temperature of coal is higher than that of charcoal, in fact, this is also the principle, if the coke after dry distillation has a higher carbon content, the temperature will be higher.

Thinking about these things, Zhang Yifan actually had a bit of a headache. But there is no way, these things have to be overcome. In other words, the cement must be made.

The first is that the ground is not cement, once the rainy season comes, it is called a muddy, as a person who has come in the future, it will definitely not be able to bear it.

Of course, in this day and age, the solution to such problems was to pave the ground with stone slabs. However, if the stone slabs were to be laid on the ground, he only had a thousand taels of silver in his hand, which was not enough at all.

Second, only by calcining the cement can not only solve the ground problem, but also because the cement is very widely used, the next step of water conservancy is also inseparable, and it can also make money for the village as a continuous source of funds for Liujia Village.

Thirdly, after calcining the cement, with experience, you can burn the glass that needs to be cooler. Of course, there are other ways to reduce the temperature of the glass, but Zhang Yifan does not plan to skip the high-temperature firing link, after all, high-temperature firing technology will be used in other aspects in the future.

is also the same, Zhang Yifan has entrusted other things to the people in the village to do, but this matter of burning cement, from the beginning of the site selection, he has been doing it personally.

At this time, after Zhu Jingjing heard his answer, she was a little surprised, it seemed that she was not as noble as she imagined, so she asked suspiciously: "What cement kiln?" Water and mud? What's the use of that? ”

The name cement is indeed a bit vulgar and low-grade, but Zhang Yifan has no intention of changing the name, just smiled and explained to Zhu Jingjing: "The cement I burned is a bit similar to Sanhe soil. ”

Speaking of this, he paused and asked, "Do you know these three and earth?" ”

"I know, I ...... Know! Zhu Jingjing listened and immediately replied, originally she wanted to say that when her father built the Nanjing city wall, he used Sanhe soil, which cost a lot, but it would make the city wall stronger. However, she quickly came back to her senses and did not reveal her identity, so she had to add another one to know.

Sanhe soil is obtained by mixing one part lime with two parts river sand and yellow mud, and then mixing it with glutinous rice and kiwi juice. Needless to say, this is very expensive.

After Zhu Yuanzhang occupied Nanjing, he had to face the threat of Chen Youliang and Zhang Shicheng, so he used Sanhe soil to build the city wall at any cost. However, the cost is too high, so that even Zhu Jingjing has heard of this Sanhe soil.

No, after she answered, she was immediately surprised, and immediately asked Zhang Yifan: "You mean, your cement can really be the same as Sanhe soil?" ”

With such a cheesy name as cement, she was a little unimaginable.

Zhang Yifan listened, smiled and said: "If it is in terms of viscosity, it should be almost good, but the use of cement is far higher than that of Sanhe soil, because the cost is very low, so it can be widely used in building houses, repairing water conservancy facilities, paving roads and bridges, etc." ”

"Ah......" Zhu Jingjing listened and was a little stunned.

After coming back to her senses, she asked in disbelief, "It's really low, but it's very easy to use, the same as Sanhe Tu?" ”

If it weren't for what Zhang Yifan said, she would definitely have to add the word "impossible".

When the others heard this, they were all about the same as Zhu Jingjing, and they were completely dumbfounded. looked at Zhang Yifan, the kind that couldn't even speak.

is really Zhang Yifan in front of them, it really makes them unable to connect with before, not only can they speak confidently and calmly, but their bearing has also become extraordinary, and even the words they say can shock their jaws!

At this time, Zhang Yifan did not immediately answer Zhu Jingjing's words, but turned his head to look around before saying: "The materials of cement are very ordinary things, it can be said that it doesn't cost money, it just takes some labor." In addition, it is the money for fuel consumption. If the cement is fired on a large scale, this cost must be very low! ”

Although Zhu Jingjing couldn't fully understand these words, after all, she didn't know how to fire cement, but just because Zhang Yifan seemed to analyze it reasonably, she already believed it.

Suddenly, she was very happy, because Zhang Yifan may not only be a generation of famous doctors, but also may have skills in other aspects! This means that her girlhood dream is more likely to come true.

The Ming Dynasty has just opened the country, and when everything is in ruins, if there is really this kind of cement, it will definitely make her father Emperor Longyan happy, then everything is easy to discuss!

As a result, she even had a feeling of impatience than Zhang Yifan, and she wanted to see the cement being fired immediately.

As a result, sometimes the more anxious people are, the more anxious God will make you.

No, when she was about to urge Zhang Yifan, she saw a group of people walking quickly from the village, and the person at the head was Liu Wu, who was Li Zheng Liu Wu of Liujia Village.

Zhang Yifan saw that Liu Wu's expression didn't seem to be good, and he was a little worried, and hurriedly greeted him and asked.

It turned out that Liu Wu went to talk about the bricks and bricks, not only did the tiles have to wait for half a month to buy, but there were no bricks for the kiln there.

When Zhang Yifan heard this, his brows immediately furrowed: things are far more difficult than he imagined!

If you go to Nanjing City to buy it, it is estimated that it will be much more expensive, and it may not be possible to buy it, after all, it is the time for the reconstruction of the whole country, what should I do?

Seeing this, Zhu Jingjing, who was on the side, immediately stood up and said to Zhang Yifan: "I'll go to my sister-in-law, she can help you solve this matter, how about it?" ”

I sent Qiu Ju to the East Palace before, but I had to explain it anyway, but it really didn't work, so I just had a showdown!