"King, King Wei is gone."

"Hmm."

After listening to Han Lucheng's reply, Li Yuanjia nodded, but his eyes kept staring at the dozen or so piles of things in front of him that were either as thick as mashed potatoes or as thin as ketchup.

These things are made by mixing "cement" with sand and gravel, and then mixing them with water.

The only difference is that the proportions of the various ingredients are different.

As for the main raw material "cement", it is limestone mixed with clay calcination, and then ground into powder - originally Li Yuanjia wanted to try to mix lime directly with clay, but then after thinking about it, the lime in his memory seemed to be gray, so he directly removed this item.

If the experiment fails, it's not too late to try this method again.

There are several types of fired cement, which are made in different ratios of limestone and clay, from one to one to five to one, with the ultimate goal of finding the best quality......

"So, isn't it easy?"

After staring at these things for a while, Li Yuanjia's eyes flashed, and a smile appeared on the corner of his mouth.

It's really hard to let him "invent" cement alone, to be honest, after all, he doesn't even know how to burn lime. But he is a prince who doesn't understand, and some of the people naturally understand it, and the ancestors have a history of burning lime for thousands of years.

Since it will burn lime, it is naturally not difficult to add clay to burn.

All that's left is to test the quality of these "cements" and see which ratio works best. Among them, it is necessary to study the ratio with water and sand and gravel, and in the future, it may be necessary to wonder whether adding other minerals during calcination can improve the strength of cement, or the speed of solidification.

What Li Yuanjia has to do is just give an idea......

Oh yes, you still need to give, give money!

"The King's ......"

Just when Li Yuanjia was secretly thinking about how long it would take and how much it would cost to make a similar cement, Han Lucheng, who had been waiting quietly next to him, suddenly said: "I don't quite understand, the cement you want to make should be very important, right?" Why let King Wei know? ”

"Hehe, do you understand?"

Regarding Han Lucheng's sudden question, Li Yuanjia was not angry or impatient, but just raised his eyebrows and asked rhetorically.

"yes, I don't understand."

Shaking his head, Han Lucheng said seriously: "I heard you say that the use of this cement, if it can be made in the future, isn't it as important as Quyuan plow?" In this case, even if you want to dedicate it to Your Majesty in the future, you should keep it secret until you do it. What if King Wei knew the method and made this thing first? ”

"Haha......"

After listening to Han Lucheng's words, Li Yuanjia suddenly laughed.

Just staying here for half an hour, can you get the cement out of the way? If Li Tai really has this ability, then Li Yuanjia will not only not be worried and angry, but I am afraid that he will go all out to befriend this kid, and then try his best to avoid the defeat of him and Li Chengqian in a few years!

In that case, Li Tai is definitely a scientific genius!

So after laughing, Li Yuanjia shook his head and said, "You, think too much!" With the identity of King Wei, it is destined that he will not fall in love with this kind of thing...... And even if King Wei can really make cement, what can he do? That thing is very useful, but it is labor-intensive and costly, and it can only be used on a small scale in a short period of time, so what if it is given to him? ”

That's Li Tai, the King of Wei of the Tang Dynasty!

Look at people's mansions in Chang'an and Luoyang, and then look at the privilege of people who can enter the palace in a sedan chair, may they lack things in this life? Is there any reason to look at a mere cement?

Don't forget, Datang has the same thing as cement, at most the cost is higher.

And cement, Li Yuanjia didn't dare to really pinch it in his hands.

He will just build this thing, and then use some of it when building the salt drying field, as for how to make it on a large scale in the future and reduce costs, it may also make people continue to study, but that's all.

If you really want to use it to make a lot of money, not to mention whether it is feasible or not during the Zhenguan years, Li Yuanjia has no interest. His title as a prince, as well as the identity of Li Shimin's younger brother, are destined for him to sell thirteen incense, Han Wang paper and glass, but whether it is Quyuan plow, or this cement, just make it and dedicate it to the emperor.

In addition, if you want to popularize the use of cement in ancient times, it is really not ordinary.

However, Li Yuanjia didn't bother to explain these things to Han Lucheng, so he directly ordered: "These things that have been stirred will all be made into cement slabs for me, and then wait for them to be completely destroyed...... You know what you're going to do next, right? ”

"Very clear, King."

Without any hesitation, Han Lucheng immediately nodded.

He already knows how to make cement slabs, and when all the cement slabs are dry, it is natural to see which of them is the hardest and strongest, and then find the best formula. Of course, at the same time, he will also let people continue to burn cement and keep experimenting, just like the glass and paper workshops outside the city!

Seeing that Han Lucheng had understood what he meant, Li Yuanjia nodded and left the small courtyard.

But the moment he stepped out of the hospital, he suddenly couldn't help it, and burst out laughing.

Li Tai, the eldest nephew, is really interesting and tight.

Although he didn't seem to have much interest in cement, before leaving, he took two more math books from his study - not those that had already been written like the six volumes, but the math books that Li Yuanjia had written from memory but had not yet finished arranging.

And in terms of content, there is almost no pure mathematical knowledge involved.

The reason why Li Yuanjia gave those two books to his nephew and let him take them away for observation is because they are basically all about how mathematics is used.

How to use Arabic numerals to keep accounts, settle accounts, simple statistical knowledge, as well as probability, percentages, and so on.

Li Yuanjia believes that if Li Tai is really interested in mathematics, and is really as smart as he seems, he will definitely want to try the content of the book in reality!

At least in his Wei Palace, Li Tai has this power.

And once Li Tai finds that these things are very useful, will he try to implement the Tianzhu number in the palace, just like the Han Wangfu?

And......

Don't forget, Li Tai is not an idle king like his eleventh uncle!

can be mixed to the point where he can compete with the crown prince Li Chengqian for the throne, how many powerful people does Li Tai usually come and go? Under his influence, will the promotion of Tianzhu Digital be faster?

Compared to this, what is a mere cement?

Thinking of this, the smile on Li Yuanjia's face naturally became even stronger, and at the same time, a thought naturally came to mind: "In this case, the abacus thing must be made quickly......"