Whether it's being a pirate or clearing the wasteland, there's a lot to do.

Since everyone celebrated, in the following days, everyone was full of enthusiasm to work around the camp, during which time, although from time to time, there were also teenagers infected with malaria, sick and living in the cabin, but with the help of artemisia soup, and the daily girls' diet and appropriate care during the sick period, so far there have been no serious patients like Li Tianyang, which is also a fortunate thing.

The first thing to build in the camp is not a house, but a wooden wall more than a foot high, which surrounds the camp that was excavated in the early stage in a boxy and strict manner, except for a gate in the east and west directions, it is difficult to enter the camp in other places. It's not that Li Tianyang can't trust these natives, it's just that the desire to release people is indispensable, a group of teenagers are outcast, and they can't always pick up the dark arrows that they put all the time, and they don't know where and when they are released.

Besides, this is a virgin land that is rarely populated and contrary to development, and carnivores such as black bears and leopards in the forest can be seen everywhere, but it is not very unusual; And those animals that have the power to harm the teenagers, such as wild boars, bobcats and poisonous snakes, wander around the camp from time to time, looking for food. In less than a month, several teenagers were frightened to death by the sudden appearance of animals, and the more timid ones did not dare to go out to work around the camp alone.

The trees used to build the wall were all made of local materials, and the trunks of the original trees cut down during the reclamation of the wasteland were cut down by one person, and the straight part of the trees was cut off, and after a little trimming, they were buried three feet deep into the ground. This made Li Tianyang shake his head, people don't know how to feel sorry for these trees with names on the desk, this will be placed in the future generations, just the wood used in this circle, even if you have the money to buy it, you may not be able to get together so much wood immediately.

Then it is to build the kiln mouth and burn the green bricks used in building materials, which is not a project that can be completed in a while, so Li Tianyang and they can only use the lush bamboo and wood around them to build a few cool and simple bamboo buildings as a temporary shelter and storage room for everyone. It's not a matter to always put the supplies in the shiphold, after all, the outside of the shiphouse is the river water, the humidity is relatively high, and materials like grain and salt can't be placed in such a place by Chang Shijie.

Moreover, everyone basically worked in the camp during the day, leaving only a few girls and sentry boys on the boat, and to be honest, everyone was really not very relieved. It would be a disaster if someone really took advantage of the fact that there were few people on the boat during the day and touched the boat and snatched it, and even all the materials that everyone relied on for their livelihood would be swept away. At least after the fence of the camp was erected, the safety of the camp was finally guaranteed, and nearly 200 teenagers were able to rely on the wall and supplies for a long time.

There is also the problem of leveling the ground, waterproof and seepage-proof, and this is another killer feature developed by Li Tianyang. Everyone also knows that through the three magic weapons, glass, cement and gunpowder, Chang Li Tianyang also knows a little bit of the raw materials required for these three magic weapons. But!!! When he thought he knew how to develop cement and told the research team the formula, the team members told him with facts that his formula was wrong.

His recipe was as follows: a few limes, mixed with clay, and fired in a kiln.

People who really know the cement formula, I'm afraid they will jump up and scold at this time, this is definitely a fake and shoddy product!! Although after using it, the product of this formula also has a bit of cement style, but compared to the previous life, Li Tianyang is familiar with you, it is really far away.

Then, Li Tianyang knew that there was definitely something wrong with the formula in his memory, what should I do? Fortunately, there is still a research team, at least Li Tianyang still remembers the main raw materials

The ingredients, which were handed over to the research team, were to find out the other ingredients and the correct firing recipe. Many years later, Li Tianyang understood a truth, a mistake is a thousand miles. Lime is right, but what is needed is quicklime, of course, it is best to use limestone, and clay is not wrong, but you need to crush the two into powder, add a taste of medicinal materials, gypsum, and mix it in a certain proportion, so as to fire a cement that has the effect of seven or eight percent of the previous life.

That's right, in this era, the biggest use of gypsum is not as a building material, but as a medicine, which was discovered by Li Tianyang. Of course, some places even use gypsum to order tofu, so I won't introduce it here.

There is no way, Li Tianyang, a half-hanger who doesn't even have half a pot of water, can only help the research team develop such cement. As for adding iron ore or something like in later generations, I'm sorry, this Li Tianyang has no impression at all, and the members of the group didn't expect to add this kind of material in the past. The disadvantage of this kind of cement is that it takes a long time to solidify, and it takes nearly 10 days to completely solidify in a dry and rainless environment, let alone in a rainy environment.

And when Li Tianyang and the others developed the cement, except for continuing to let the members of the team improve the formula and strive to achieve the characteristics of cement that Li Tianyang was familiar with in his previous life, no one knew the news of this product.

Why didn't Li Tianyang take it out and buy and sell it as a commodity like anything else? In Li Tianyang's opinion, this is an absolute fighter in SB. Regardless of the past and present life, the greatest function of cement, in addition to being a perfect building material, is an important part of national defense and military. In this era when firearms were not yet prevalent and high-walled cities were a moat, cement would be confiscated by the ruling classes of various countries and used as a secret weapon wherever it was born.

Li Tianyang didn't want the products they had spent years of hard work and time to achieve would end up being just a bureaucrat, and would even endanger the safety of himself and the people around him. Therefore, he kept it a secret and directly put this black technology into the cold palace, and it was not until they came to this side that there were no bureaucrats and no fertile land for rule, and he decided to use this killer weapon.

Although Li Tianyang hid the cement formula, it does not mean that Li Tianyang did not produce cement. Over the years, testing and developing cement has been a task of the group, although the effect of these experiments is a little different, but it is enough for daily use. When Li Tianyang and the others lifted the cement out, in full view of everyone, led everyone to mix with the rough sea sand on the seaside, and spread it on the ground, more than 20 days later, the original sand ground became a solid stone, flat as one, white jade-like ground.

This is really like magic, some people don't even believe in evil, pick up the hammer in their hands and smash it hard, but they can't hurt the ground at all.

Sorry for being a little late

(End of chapter)