"Yes, Your Majesty, the cave set up in this courtyard is specially for the palace to burn lime. Pen? Interesting? Pavilion wWw. ｂiquge。 The limestone used in info is made of high-quality stone, and the lime fired is very uniform and fine, and it is the best lime in the lime. As soon as Yang Shan heard Chongzhen's inquiry, he immediately explained in detail, "Usually, this courtyard is locked when not in use, so relatively speaking, it is much more secretive. ”

"Well, this lime plant is still very good." Chongzhen was very satisfied, "Lord Yang, you go find some skilled workers now, I need to use these minerals to smelt something, pay attention, the personnel must be reliable." ”

"Yes, Your Majesty, the minister will do it." Yang Shan didn't dare to slack off, and after receiving the order, he left quickly.

After Yang Shan left, Chongzhen was not idle, he was like a child, looking back and forth between the minerals, picking up some of them from time to time, and carefully examining and comparing.

A moment later, Yang Shan was followed by five sturdy middle-aged men and an old man walking briskly. At first, everyone didn't observe carefully, and when a group of people walked up, Chongzhen realized that this old man was a little familiar, isn't this the doorman just now, that relatively thin body, as if it could be blown down by just a gust of wind. However, since Yang Shan was able to let him come over, this person must have a certain level in burning lime.

"I, let Lord Yang arrange for you to come over this time, and I have one thing to explain to you. You should have noticed the minerals in front of you, and I am now going to use them to make something called cement. Chongzhen saw that the craftsmen were coming, without too much nonsense, and bluntly stated the purpose of his trip, Chongzhen did not continue after speaking, he was ready to give everyone time to understand.

Cement? Listening to this term, the craftsmen heard it in a fog, and they didn't know what it was. I and others can only do the same work, and I have been burning lime in this miscellaneous bureau all my life, and I have never heard of a thing called cement.

Sun Lishi is the oldest in this group of people, so all the craftsmen looked at Sun Lishi with the same puzzled eyes, hoping that Sun Lishi would come forward. Sun Lishi didn't want to come out, so he looked at everyone helplessly, and finally had to ask Chongzhen hard: "Your Majesty, you have burned lime all your life, and you have never heard of cement, so you don't know where to start, and I hope the emperor will make it clear." ”

Chongzhen smiled and said to Sun Lishi: "Don't care what this cement is, just know that this item is very useful." As long as you can make it successfully, I will be rewarded. Now you will note down the production process, the production process of cement is generally divided into two grinding and one burning. First of all, the limestone is fired into quicklime, and then the quicklime, iron powder and clay and other materials are mixed in a certain proportion, quicklime accounts for eighty, clay accounts for more than one, and the rest is iron powder, and then grinded together into powder, at this time, such powder is called raw meal. This raw meal is then calcined again, and after high temperature calcination, cement clinker is made. Cement clinker is ground into powder with a certain amount of gypsum, and cement is made.

I just said a rough idea, the specific details still need to be studied by yourself, after the cement is self-made, you can verify it, the verification method is, take some cement and add some water and mix it with stones, and then pour it into a square size, and when it dries, if it is about the same hardness as the stone, it will be successful.

Once the production is successful, report to me immediately, and I will wait for your good news in the palace. But there is one thing, I said earlier, if you reveal half a word about today's events, even your wives and children can't say it, otherwise, be careful of your heads. Of course, I will not treat you badly, as long as you can do this well for me, your glory and wealth will not be worried, and I will ensure that you will have no worries about food and clothing for the rest of your life. "Hit a stick, but also give a date, grace and power are the way of the emperor, Chongzhen has unconsciously completely transformed into an emperor. People often say that the times create heroes, but they don't know that heroes can also create the times!

One moment, Chongzhen was still smiling, and the next moment, Chongzhen's face was instantly filled with murderous aura.

Everyone was so frightened that they knelt on the ground, and kept promising that they would be like a tiger, and they finally realized that all the craftsmen were so frightened that they broke out in a cold sweat, and their legs couldn't help shaking.