"We built a few brick kilns and tried it, and they burned much faster than the carbon used to be, and coal is everywhere, just dig it up, it's much cheaper than carbon." And I also noticed that the fired bricks are harder than before. I don't really understand the reason for this, but I think it has something to do with the heat. ”

After Kurut finished speaking, he looked at Liu Feng. He came up with the idea, and he must know why.

In fact, the reason is very simple, the temperature of coal burning can reach about 1,800 degrees, and the temperature of charcoal can reach 1,000 degrees. Whether it is steelmaking or brick burning, the high temperature will naturally burn faster, and the hardness of the burned bricks will be higher.

But how can this be explained? Liu Feng made a difficulty, but looking at the small eyes of everyone's expectation, Liu Feng roughly said, "This coal can burn clay and other things through, and the flame is more violent, so it is better to burn bricks and make steel." ”

"I'll just say, it's about the heat. In the past, we had to make good use of wind power in steelmaking, which is probably the same reason. Kuru nodded, indicating that he understood, this fat guy can also touch the bypass.

"I see, it sees, coal is a really good thing." Dhoni nodded in understanding.

Isn't it, black gold, just kidding, Liu Feng said in his heart. However, now, coal is not widely used, and the coal reserves here are ridiculously high, which can be said to be inexhaustible, so there is nothing to worry about.

"Crazy, in this case, as long as we build more brick factories, won't everyone be able to live in a brick house?" Sula asked.

"That's nature! The brick factory was very simple to build, and it was easier to burn bricks than before. The house built with bricks and wood is very stable. Kurut is just a demonstration, and in the future, the people themselves can build brick factories. Bricks are cheap, and the people will naturally make a choice. Liu Feng said.

"When you build a city, you can build it directly with bricks, and it will be much stronger than before." Dhoni said.

"Yes, before, there were very few bricks, and most of them were made of soil, so naturally they can't be the same." Zhao Yun nodded in praise, he had never seen so many bricks.

"General Doni, there are even more amazing things, do you want to see them?" Kurut continued with a grin.

"What else is magical?" has been with Liu Feng for some time, and there are too many magical people and things, which makes him a little dizzy.

"Come and see." Kurut said, leading the group to another site, where the floor was covered with a large piece of slate-like slate. Liu Feng recognized it at a glance, this was cement. In my previous life, there were concrete forests everywhere, and this thing is not strange. I didn't expect this Kurut to be really a talent, so he fired it successfully.

"Fatty, what is this, like a stone, it's quite smooth!" Asila took Kuranyi and Talia and stepped on, walking around.

"Hey, it's called cement! It's very smooth and hard, and it's really comparable to stone. Kurut said.

"Really? Would you like me to give it a try? "Doni don't believe it, this thing doesn't look very thick, can it compare to stone?

"Just try!" Kurut waved his hand, unconcerned.

Everyone wanted to see the quality of the cement and urged Doni to try it. This is a good try, Doni picked up a big rock next to him, he hesitated a little, worried that he would smash such a flat cement, and looked at Kurut, "Fatty, I'm really going to smash it, smash it, don't ask me for compensation?" ”

"Even if it's smashed, it's broken, and I'll pay you money." Kurut said, patting his stomach.

"Bang!" With a loud bang, Doni was really unkind, and smashed it into the cement block with all his might.

The big stone and the cement block collided, and each one was fine, leaving only a white spot on the cement block, and there was no damage when I walked with my feet.

"Awesome!" Ma Jun became interested, "Kurut, what are you doing here?" How? How can it be so hard? ”

"Hahaha, this is not the hardest, you look at that piece again." Kurut said, gesturing to a slightly smaller cement block not far away, "That one is much harder than stone, I guess, your ordinary burst box can't help it?" ”

"Fatty, is it a big blow?" Zhao Yun said, "We have all seen the power of this burst box, the boulder can be blown to pieces, and it can't rot your cement block?" ”

"General, Kurut doesn't dare to say anything, I really haven't tried it, but this piece of cement is really very hard. If Mr. Deheng wants to try it, he can do so at any time. Kurut said, looking at Liu Feng.

To be honest, Kurut didn't know the bottom in his heart, he had only heard Liu Feng say that as long as it was thick enough, with steel bars in it, it was harder than stone. Originally, he didn't believe it, but when he really made it, after hitting it with a big rock, he also had some confidence.

"So, let everyone open their eyes?" Liu Feng, who hadn't spoken for a long time, spoke. He also wanted to know what effect the cement made by the ancient method and the steel bars made by Kurut could achieve. The earthen blast box, against the earthen concrete, to see if the spear is sharper or the shield is harder.

Hula, the workers who had been busy before also gathered around, and they had more or less heard of the magic of the bursting box. They had never seen cement before, and after seeing it a few days ago, they secretly called themselves surprised. Now that the contradictions are fighting, they also want to see a lively scene.

"Okay, let's try it, there are just two ready-made burst boxes, just in time for testing. However, you should stay away and don't hurt anyone. Ma Jun said, instructing the students to start experimenting.

Kurut sent men to carry the cement blocks to an open area. Ma Jun's students began to lay out the crackbox, placing it under the cement block and pulling out the lead.

People watched from afar, looking forward to this contest.

"I heard that this burst box is very powerful, and it has blown up all the boulders not far away before, can our cement block withstand it?" The workers of the brick factory, although they are facing the cement block, still have no bottom in their hearts.

"It's hard to say, we made this cement block, and added a lot of steel bars in the middle, which is logically hard enough. But this blast box is also powerful, no matter who wins, it's a great feat. "This one thinks clearly, and he can win anything.

"Brother madman, which one do you like?" Asila asked Liu Feng excitedly.

"yes, we're all having a hard time judging, which one do you think will win?" Kulanyi was also nervous.

"Hehe", Liu Feng smiled indifferently, "Let's wait and see, if you want me to say, the cement block will win." ”

Cement plus rebar, the strength and toughness of this thing are absolutely trustworthy. It's not that it can't be blown up completely, it's just that the power of this kind of burst box is still a little worse, and if it is improved, there is really a chance.