Chapter 299： cement? Volcanic ash?

After more than two years of long-term construction, a high-level reservoir with an area of ​​up to 0.1 square kilometers was finally built on the northern bank of the Leda River 15 kilometers east of Lyle County. (For the cause, please refer to Chapter 308 of "The King of German Mercenaries")

The high reservoir is 20 meters high and consumes a lot of bricks, cement and steel. Among them, the bottom of the reservoir is paved with bricks and then coated with cement as a leak-proof guarantee. For the surrounding area, reinforced concrete was used. Of course, it's not pure reinforced concrete, otherwise, Marin doesn't have that much steel. The surrounding walls are still made of bricks first, and then reinforced concrete is added. Although it is not as strong as those of later large reservoirs, it is also a small reservoir in itself, and its surrounding strength is sufficient.

The water from the reservoir came from the Leda River, and the craftsmen arranged dozens of Dutch windmills to send water to the high reservoir day and night. The water in the reservoir has a discharge channel on the north side. But in this discharge channel, there is a row of hydraulic forging hammers that can't stop working.

Because the water level of the reservoir was too high, I was afraid that the Dutch windmill would not be able to lift the water. The craftsmen built a medium-indirect force pool, which is also a cement pool. Through the relay pumping, the ability to pump water into the 20-meter-high reservoir was realized.

However, such a huge siege cost Marin 200,000 gold coins and more than two years of construction time. However, Marin has no choice, because the northwestern part of Germany is plain, and there is no such place with high water level. Unlike England, there are many high-drop rivers in the mountains suitable for driving hydraulic machinery.

Really helpless, Marin wanted to use hydraulic machinery, but he had only built a high-level reservoir made by himself. However, I did not expect such a high cost. Originally, Marin planned to build a 1 square kilometer high reservoir, but the estimated cost at that time was 1 million gold coins, which scared Marin. Therefore, it was later modified to 0.2 square kilometers. However, after practicing, I found that the cost may be higher than expected. So, it was changed to 0.1 square kilometers. However, it still cost as much as 200,000 gold coins. Mainly, the price of steel is too expensive. If it were not for Marin to build an iron-making blast furnace and a steel-making open hearth furnace and use the same generation of high-priced steel as the steel bars, the cost is estimated to have steadily exceeded one million.

Although the water storage capacity is insufficient, because there are dozens of Dutch waterwheels pumping water uninterruptedly, there is no need to worry about the water shortage. Therefore, the row of hydraulic forging hammers is enough to start.

When Marin inspected the reservoir and supporting forging base, the craftsmen said confidently. In the future, plate armor forging will become a pediatrics, and mass production can be completed quickly ...

Marin is very happy, although the plate armor will eventually be eliminated by the musket. However, under the circumstances that European muskets are not very popular, plate armor is still very popular in Europe for the time being. Because of this group of hydraulic forging hammers, the speed of plate armor production at the forging base has not only accelerated, but also the cost has been greatly reduced.

Moreover, the hydraulic forging hammer can be used not only to build plate armor, but also to forge swords and other weapons. The plate armor will be eliminated in a few decades, but the sword is longer than the plate armor. At least, the cavalry persisted until the first half of the 20th century when machine guns were popular. Accompanying cavalry is naturally a cavalry sword.

Looking at the large row of hydraulic forging hammers, Marin was also eager to try-he was ready to become an international weapon supplier. Of course, instead of selling high-end weapons such as missile aircraft, but low-end weapons such as plate armor and swords. Moreover, the profit of selling such weapons is also quite large.

Touching the tall fence around the high-level reservoir, Marin felt what was firm and strong. So, Marin wanted to use his own reinforced concrete for the city of Aurich ...

In the past two years or so, the steel bars of Marin's steel plant have been basically used to repair reservoirs, as well as cement. Now that the high-level reservoir has been repaired, it is equivalent to the products of iron and steel plants and cement production bases, and they don't know where to sell them. So Marin decided to add reinforced concrete to the outside of Aurich's city wall, making Aurich a strong city with no artillery.

You know, Aurich is the lifeblood of Marin, with his wife and children. If he fought outside, Orich was defeated and his wife and children were killed, he would not know how to deal with it. If his wife and children are dead, what is the point of having him lay down the next big river? It is estimated that it will fall apart like the Alexander Empire ...

Therefore, the solidity and safety of Aurich is also very important.

However, once cement was used to build the capital. Then, something like cement must be publicly displayed in front of the world. After all, Aurich is the capital, and there are many foreign envoys, and it is impossible to maintain confidentiality.

Therefore, Marin decided to study the plots in some novels and said to him-this is Roman volcanic ash ...

However, in particular, I don't have a site in Italy. Therefore, we need to find a reason. For example, my er colony discovered a volcano, which produced volcanic ash suitable for construction ...

Volcanic ash cement is actually a very good building material. Marin studied history. When he read in his last life, the teacher introduced-Roman volcanic ash cement, which is a mixture of volcanic ash and quick lime to form a mortar, and then volcanic tuff with different particle sizes Mixing to form a wood-like structure, adding seawater to trigger the process of thermochemical reaction.

Although this volcanic ash cement is moderately strong, it has a very powerful characteristic-it is resistant to weather and rain. The ancient Roman cement buildings in the city of Rome, even in the 21st century, still stand. Unlike the teaching building of the university where Marin studied in the previous life, the wall was cracked in 1996 ... Fortunately, the eastern plain area is not an earthquake. If it is changed to the unstable region of the western crust, this building quality, shock, can A college student who died a whole building ...

Of course, this is because some blackhearted merchants use substandard materials. However, ordinary Portland cement is not as good as Roman volcanic ash cement, which is true.

Of course, that means ordinary Portland cement. The cement produced by Marin using the fly ash left after coal combustion has good crack resistance, good corrosion resistance and no worse quality than Roman cement.

The only problem is that a lot of fly ash is needed. As it happens, Marin uses a lot of coal to boil salt, so there are so many fly ash, making the raw material of fly ash cement is sufficient. For individual people, it may not be possible to get so much fly ash.

Moreover, in Western Europe, the Ruhr area of ​​Germany and the United Kingdom are rich in coal. This is also the main reason why Britain and Germany could become industrial powers. The French want to become a big industrial country, but they lack coal. Therefore, they later became the usury empire ...

As for Spain and Italy, they could n’t develop in the 19th century, and they could n’t blame the idiots. Instead, there is really no coal in the two countries ... You say that this steam engine burns coal. Without coal, it develops a ghostly modern industry ...

Even if China can rise, it is inseparable from the massive coal reserves ~ www.novelhall.com ~ How can it develop without the sky dust? Can everyone become a developed country by writing poems and bragging?

For the formulation of cement, Marin must be kept secret. Even, the manufacturing method of Roman volcanic ash cement, Marin must be kept secret. As for others asking, Marin said that this is a special volcanic ash that was mined overseas. This kind of thing is also available in Rome. Well, you can go to the city of Rome to see ... Now, there should be this kind of volcanic ash on the Italian peninsula ... After all, Pompeii is buried by volcanic ash ... or you go to explore Pompeii go with? Not only volcanic ash, but also valuable antiques ...

As for other countries, such as Britain and France-ah, sorry, there is no volcano in your country, then I can't help it. Otherwise, French demon, you continue to rob Italy?

As for the issue of technical leaks, this era is unlikely. Why? Because there is very little population movement in this era. Because they are still in the era of serfs, the freedom of serfs is restricted and they cannot leave the manor at will. Therefore, there are very few out-of-town people. As long as the base is located in the countryside, not in a city with many eyes, confidentiality can be guaranteed. Want to catch a spy? Check who is a foreigner, just grab it and torture it. As long as you control the craftsmen, the possibility of leaking is very low ... Therefore, Marin always chooses serf craftsmen to control. If the civilian craftsmen like uncles are difficult to control, it is very easy to leak ...

There are ancient Roman volcanic ash covering the front, coupled with Marin ’s strong military power, it is not very easy to provoke. Many people estimate that they will choose to find ancient Roman books and find methods for manufacturing volcanic ash cement. Of course, even if they found a way to make Roman cement, Marin was not worried. Because, others don't know the reinforced concrete technology. This is the cement technology with the most military strategic value ...