Huang Junming agreed to the cement production and promised to make the finished product within one month

He has been a soldier and still has some understanding of such useful things in national defense. Military cement is too complicated and Huang Junming cannot make it. If you think about it carefully, modern cement processes are quite complicated. In the process of the early Tang Dynasty, the feasibility is low and scary...

However, this is not a problem for Huang Junming. In his memory, the city walls mixed with glutinous rice slurry water are now similar to those of Roman cement made in ancient Rome. Huang Junming still has a little understanding of this kind. There are more types of cement that are less complicated than Roman cement, but it just depends on how Huang Junming chooses.

As for strength, Huang Junming is not within the scope of consideration. As long as he can withstand the power of **, it is enough. To be honest, Huang Junming is quite contemptuous of the gunpowder he muttered. Although the power is as amazing as a god in the Tang Dynasty, it is very low compared to modern times. Huang Junming can also make the gunpowder, but there is no need. Black gunpowder is enough for the Tang Dynasty. In the future, scientists in the Tang Dynasty will study it themselves.

The cement stronger than Roman cement made Huang Junming pick a lot. Roman cement is made by a mixture of volcanic ash and lime, and its strength is similar to that of the current city walls, so it is naturally excluded. Smithton cement, which is based on modern cement, is made of clay and limestone at the same time. Although it is harder than the current city walls, it is not within Huang Junming's consideration. The slightly stronger natural cement is because Huang Junming does not know what marl limestone is, so he can only throw it away. Looking down, only Brandt cement and bauxite cement are available.

These two types of cement can definitely withstand the bombardment of black gunpowder. The first type of Brandt cement is very simple. Lime and clay are mixed three to one, ground into powder after firing.*. Then we can use this. This is roughly the same as today's cement. Most of the cement used during the Republic of China were used. Huang Junming thought about it and finally decided that this is the simplest and most in line with the current situation.

As for the reason why the bauxite cement was abandoned, it was actually very simple. Bauxite cement needed bauxite companion ore and iron-containing iron bauxite was also fired. Huang Junming was not interested in being a geological expert, so he was too troublesome, so he had to choose Brandt Cement in the end.

The cement was fired quite smoothly, and there was no high-tech content. Huang Junming looked at the notebook-sized cement block and knocked it, and ran to the East Palace where Li Shimin was very satisfied with the sample.

"I'm so angry! He still knows that he is my uncle! Is there anyone like this?" Huang Junming heard Li Shimin's roar from a distance. It sounded like a prince from their old Li family had messed with him.

There is no need to be passed down on the incident between Huang Junming from the East Palace. Who told Li Chengqian and Li Tai to walk around the East Palace often after Huang Junming's butt? Huang Junming walked in the voice, but saw Li Shimin paced impatiently in the small garden of the East Palace. His face was quite long and his face was very dark, and it seemed that he was really angry.

"Who are you angry with?" Huang Junming held the cement block and held a big bag and teased Li Shimin. "It hurts your body. Your Majesty still wants to open it. Why don't you read it for you again~-The scriptures?"

"It seems that the Immortal Master has not read enough scriptures these days!" Li Shimin heard Huang Junming's voice. His face changed rapidly. He calmed down and returned to Huang Junming. Although he could still feel that he was not in a good mood, he could still be called the throne of a hero. "Do I know that the Immortal Master will come to the door without any trouble. I wonder what the Immortal Master has to do to me this time?" Li Shimin signaled Huang Junming to follow him to sit down on the stone bench in the small garden.

Huang Junming gently placed the cement board in his hand on the stone table, then placed the bag in his hand aside, pointed at the cement board and said to Li Shimin: "Your Majesty. I am here to give you a gift!"

"Oh?" Li Shimin widened his eyes and looked at the cement slab on the stone table. "But this slab? Well, this thing is polished quite neatly. Why is the immortal master having the leisure to do this? And it's nothing special. Ordinary stonemasons can make it as long as they have some time, right?"

Huang Junming rolled his eyes. Li Shimin sincerely teased himself that this thing was not something that stonemason could do. "If you don't want this thing, I will take it away." Huang Junming acted to take away the cement board.

Li Shimin smiled with his hand and said, "Immortal Master, tell me what this thing is. You won't send me an ordinary stone slab."

Huang Junming asked Li Shimin mysteriously: "Which Majesty thinks this thing is stronger than the city wall?"

"Of course it's a stone!" Li Shimin returned without thinking: "Is the thing that the immortal master said to strengthen the city wall is a stone? I vaguely remember, didn't you say what cement is?"

Huang Junming pointed at the cement board and said affirmatively: "This is cement!"

"Is this cement?" Li Shimin was stunned by Huang Junming's statement. The group repeated.

"That's right, Your Majesty, don't mistakenly think that this is a stone slab." Huang Junming explained: "I only took a day to make this cement slab. And it's not limited to this. It can be said that what I want to make, what cement will become."

"That means that the immortal master can make such a stone called cement?" Li Shimin came to his senses.

"Your Majesty, you can understand this too." Huang Junming reached out to the bag, which was filled with cement powder. He pointed to the powder and said to Li Shimin: "This is the burned cement! Just add water and mix some sand and you can make stones of any shape!"

Li Shimin's mind was a little twitching. He looked at the cement powder and the cement board. After looking back and forth for more than ten times, he could not see any connection between these two things. However, based on his trust in Huang Junming, he still said tentatively: "Immortal Master, how much does this cement cost?"

"One pound is only ten cents!" Huang Junming calculated clearly that limestone and clay are not used at all now, and it is just a little bit expensive to burn the fire.

"Hiss!" Li Shimin took a breath. He could make a pound of powder that could make ten yuan in just ten cents? This seemed too magical to Li Shimin.

"Haha, Your Majesty, I can demonstrate it to you. As long as you see how I do it, you will know." Seeing that Li Shimin is sure, Huang Junming found a container for a wooden basin and mixed the sand, pebbles, and water cement together. "It's done! Just wait for a day or two!" Huang Junming clapped his hands under Li Shimin's gaze.

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The first update, I will go to Dalian southwest tomorrow. I roughly think I will stay in Dalian for five days. Sorry, the update ticket cannot be updated, because there will be no manuscripts for the past few days after the update. I am sorry.
Chapter completed!