Behind me is the entire history of mankind!

Chapter 25 The Renaissance (for further reading)

Another morning, Lincheng wrote today's novice tasks into the UI chip in the main control room of the origin base.

The first is the b-level mission issued by the first base.

[Cooperate to kill the giant fine-toothed bear, mission reward: permanent use right of 75-pound compound bow, each participant in the mission will receive a maximum of [-] military merits depending on the degree of participation (can be used to increase military rank, and can also be used to exchange items in the store) . 】

Lincheng thought for a moment, and the farming tasks should be announced. First of all, the dust removal work at the base. Although his physical strength is good, his head is about to explode after the dust removal work has been done in the past few months.

But he only cleaned up a few rooms, and there were ready-made tools, so how could he let it go.

[Cleaning up of the origin base: Since the origin base has not been used for many years, the interior of the base is already covered with various dust and spider webs that need to be cleaned up. The highest military merit reward can be obtained is [-] points, and the lowest point is evaluated according to the cleaning area and effect.

Note: Spider silk can be used as a photoresist material, which can be collected for easy resurrection, or sold to the base. 】

Then there is the construction work on the surface. As Einstein said, the underground is indeed not a place for people to live. ground.

The reason why human beings lived underground in the past was because the ground was full of nuclear radiation, but now, it is time to move to the ground.

And if you want to build buildings that can protect against wild beasts and various unknown monsters, ordinary wooden houses will definitely not work, so you need to find a way to get the cement out.

Lincheng looked at Mendeleev beside him, "What conditions are needed for cement to be made?"

"If only a certain degree of cohesiveness is satisfied, it can be made of three-component clay, which is the simplest "cement".

Or burn the bark into ashes, add water and stir, filter out the upper layer of potash water, and squeeze out the remaining mud to get calcium hydroxide and calcium carbonate.

Then add these two things to the blast furnace for calcination, mix them with sand and soil, add water and mix them well to form plant ash cement. "

"Sounds very simple." Lincheng said.

"There is no difficulty other than the construction of the blast furnace for calcination."

"How strong is it?" Lincheng said.

"It can't be compared with the cement used in modern buildings. If you want to build stronger cement, you need a cement kiln with a temperature of 1450 degrees. With that, you can burn limestone and clay to make calcium carbonate cement.

If there is gypsum, it is Portland cement, which is what is mainly used in modern construction.

Originally, apart from the cement kiln, the most difficult thing is how to make the material fine enough, but we have ether particles, so it is not difficult to use them in the early stage.

If iron mines are opened in the future and slag is added, the strength will be higher, and then steel fibers will be added. This is the seaside, and there should be a lot of shallow sea limestone. "

"Cement kiln?" Lincheng pondered for a moment, "Can it be fired by nuclear fusion in the base?"

"Billions of high temperatures, things will be gasified instantly when put in, and the production of electric furnaces is more difficult." Mendeleev said.

"What material should the stove be made of? Is clay okay?"

"At a high temperature of [-] degrees, ordinary clay furnaces will be burned, and ordinary cement will not work. When it is close to [-] degrees, ordinary cement will gradually soften and crack.

Natural aluminum silicate materials with kaolinite as the main mineral component are required.

Alternatively, raw materials with high alumina content can be calcined into refractory materials for the inner wall, such as bauxite. "

"It's hard to find things." Lincheng said with emotion.

"You can go to 69 and try to see if you can get a map of the distribution of mines in the world." Mendeleev suggested. If you're near areas that are rich in kaolin, then maybe refractory materials will be well available."

Lincheng thought for a moment, "Nuwa should know where the origin base is."

"Using plant ash to make cement is not very efficient, and the effect is not satisfactory. We can use rocks to make walls, and use wood to build houses inside, which is stronger than building with plant ash cement."

"Rock?" Lincheng frowned.

"In order to find sulfur ore, I asked Nuwa, there is a crater nearby, and near there, there should be basalt, which is one of the strongest rocks, good building materials, people usually build bridges and tall buildings Sometimes basalt will be added instead of steel bars to reduce weight, but the hardness will not be weakened in the slightest.

Its specific gravity is heavier than most granite limestones, but because of its many pores, it is light in weight, easy to carry, sound-proof, heat-insulating, and corrosion-resistant.

Although basalt itself is not suitable for refractory materials, the most important thing is that it contains aluminum oxide inside. Through ether particles, we can extract the alumina we need from it, and mix the rest of the materials to make refractory materials.

And there are usually a lot of resources next to the volcano, various non-metallic ore and metal ore, you can try to explore it. "

Lincheng's eyes brightened slightly, "The decomposition ability of ether particles can easily mine basalt and reassemble it into a whole wall. In this way, we don't need cement for bonding at all. It is indeed better than cement. Be strong."

"The Mohs hardness of basalt is seven, which is about the same as reinforced concrete. The conditions for the formation of ether particles doom it to be unable to survive in the industrial system for a long time, but it is extremely convenient to build a small gathering place in this way.

And with refractory materials, the cement furnace is easy to make. As long as the fuel problem is solved, calcium carbonate cement can also be produced. Moreover, the furnace with a temperature of thousands of degrees can also do many things, such as iron and steel refining. "

"Mining and construction are fine, so what about transportation?"

"You can make a simple cart out of wood," Mendeleev said.

"I can build a car."

The experimental door on the side of the main control room slowly opened, and Teslai, covered in oil, came in from the outside.

Facing the curious eyes of the two, Tesla explained.

"I dismantled a transport vehicle on the first floor, and wanted to see what the structure of the future vehicle would look like, and whether it could be repaired."

"Can it be repaired?" Lincheng asked.

Tesla shook his head, "I tried to assemble and found that there were more than ten parts."

"It's too real." Lincheng said happily.

"The parts are basically old, and the structure of the car is different from the past. Without detailed data, restoration is impossible, but the engine is good. I can use those materials to make a [-]th century car with ether particles. Transporter."

Lincheng nodded.

Continue to write the third and fourth tasks in the task panel in front of you.

[Bring an ether particle mineral mining machine, go to the volcano to mine basalt, and transport it to the base, one hundred catties of basalt can be exchanged for ten points of military merit. 】

[Tree-cutting task: to cut down forest trees and use them to build houses, military merit points will be awarded depending on the size of the trees. 】

In the end, whether you are breaking down basalt or adding new people, you need ether particles, and ether particles are formed by transforming souls, so you need to hunt.

[Hunting task: capture or kill a prey, and submit the body within an hour of death, you can get a minimum of one point and a maximum of ten points of military merit. 】

"Besides that, I'm going to find someone who has attainments in the field of architecture." Lincheng's eyes shone with a glint.

"Are you looking for it among the players?" Tesla asked curiously.

"No, I already have a candidate, and that is also a genius who has decided an era."

Lincheng murmured softly, he silently took out his time machine, and then slowly disappeared in place
What he will go to is the dividing line between the Middle Ages and modern times - the Renaissance era.

(End of this chapter)