That night, Yaoyao taught Li Chengqian how to maintain cement. The simplest and most direct one was nothing more than watering.

At the same time... Li Chengqian also learned a word called "evaporation".

Moreover... Yaoyao also conducted another salt evaporation and precipitation experiment, pointing out that when the water in the brine evaporates to a certain level, it will affect the salt in the brine, causing the salt to precipitate.

So cement is the same, except that the evaporation of moisture in cement affects the strength, durability, etc.

Although he had been mentally prepared for a long time, Li Chengqian still had to be surprised by Yaoyao's summary of these inconspicuous things in daily life.

What's more important is that she can summarize these completely inconspicuous things and phenomena in just a few words.

“So…is this what you learned?”

He hugged Yaoyao from behind, and the second floor of Chengfeng Palace, the two of them looked out from a railing.

The night is nice tonight.

Yaoyao also nodded: "That's right! This is what I have learned. Will Your Highness find it very strange? No! It should be, will you find it very strange?" Yaoyao finally turned his head and asked him.

Li Chengqian also said to the side of his head: "It's strange, it's a bit strange, but you just renamed it something that no one else had ever paid attention to in the past."

Yaoyao: "Actually, the lychees I said before also need to breathe, which is also evaporated. Also, people sweat, but in fact they also evaporate. People sweat to regulate body temperature and moisturize the skin. Do you know what body temperature is?"

Li Chengqian: "I don't know."

Yaoyao: "It's the temperature of your body. If you touch my hands, do you want to cooler? When you touch my hands, it means that your palm is hotter than the surface of my arm. Why is your palm hotter by my arm? This is because of evaporation. Because your hands just touch our children, the wind cannot get the wind flowing outside to increase the evaporation speed, while my arms are exposed outside and are constantly blown by the wind. In fact, it is not because the wind is very cool, so we feel very cool, but the wind takes away the moisture from our hands, that is, sweat, and the evaporation of sweat will take away the heat, which means our body temperature, so your palm is hotter than my arms outside. But generally speaking, the body temperature of the palm is also higher than that of the arms. The body temperature in different places of the body is different. Some places will be hotter and some places will be colder."

Li Chengqian: "So, is this evaporation still a very complex science?"

Yaoyao: "If you think so, I feel very comforted."

Li Chengqian: "When it comes to this... Recently, Yaoyao, have you called the Crown Prince, and regard yourself as the Crown Prince, and have become more and more?"

Yaoyao: "Isn't it possible?"

Li Chengqian frowned, thought for a while, and then replied: "It's not impossible. If this is the case, then the prince will be a bit worthless in the future. Moreover, you didn't say that you will call Prince Your Highness when you are happy."

Yaoyao: "That proves that I have been very happy recently."

Li Chengqian: "But you obviously may not be happy sometimes."

Yaoyao: "For example."

Li Chengqian: "For example, when discussing important matters or when calling me to outsiders."

Yaoyao: "If I don't call you His Royal Highness the Crown Prince, how should I call you in front of outsiders? Will you call you Li Chengqian directly? Is this a sign of sensibility?"

Li Chengqian: "It seems that something makes sense for you to say this!"

Yaoyao: "It would be better to do this. You can judge it by the tone, for example..." Then, she shouted several times in succession to the Prince of the Crown Prince with different tones, and a few of them could make him even get goosebumps and couldn't stop.

Li Chengqian: "Not bad! These are very nice."

Yaoyao: "Why no one came to impeach you?" Obviously, she said this jokingly.

Li Chengqian: "Does the foreign minister even need to take care of the life of the prince's harem? As the crown prince, it is not natural for me to fall in love with the crown prince's concubine?"

Yaoyao: "Well... you finally said some domineering words. This domineeringness is reflected in, first, not taking foreign ministers seriously at all, second, forcibly occupying me. Not bad!"

Li Chengqian finished hearing what she said...

It also feels a bit subtle.

So, what does Yaoyao mean?

Is this encouraging him to forcibly occupy her?

...

The next day.

After twelve hours of solidification, the strength of the two concretes was basically the same as that of stones.

There is no problem when you step on it.

Of course, it just looks a little wet.

When Li Chengqian saw this scene, he did not think of using it to build the city wall as many novels wrote. He immediately thought of using it to build the city wall. Who is so genius? He could think of it in an instant. He was afraid that the city defending generals who often defended the city and were often breached by people with the city gate and the city wall, and that he thought of such a genius.

Li Chengqian is obviously not such a genius. He just wants to know how hard this thing can be after it is completely dry.

In fact, it doesn’t feel very dry when you touch it now. At least, you can always feel a little wet. In order to make it dry faster, Li Chengqian also lets this place in a place with sunlight to dry.

in this way……

After three days of drying and maintenance, I will knock it directly with a hammer, otherwise how can I know whether it is hard or not?

Li Chengqian ordered people to bring a hammer and jingle outside Chengfeng Hall.

All the female officials and palace maids also came to watch. It is not an exaggeration to say that Li Chengqian was raised by a woman in the harem.

After all, there were more than a dozen palace maids just watching.

No wonder Li Chengqian is not domineering enough at all.

After Li Chengqian finished the experiment, when he came back, Yaoyao could also see the gravel and crushed powder he dug out of the concrete blocks.

"It's really hard after this thing is dry."

Li Chengqian came back with the gravel and said to Yaoyao.

On the other hand, Yaoyao looked at the things in his hand and said, "Well, you have basically mastered the use of concrete now. Next, I will teach you how to paste ceramic tiles."

After saying that, he picked up the concrete that had been knocked out of shape again. Fortunately, there were still some left to use.

Then, Yaoyao began to teach him how to be a bricklayer.
Chapter completed!