Chapter 385: Conception of a New Type of Artillery
Inside Hongren Hall. Updated without error@
After discussing the bastion, Lin Jing looked at Song Yingxing aside and said softly: "Although the bastion has little to do with you, sir, I thought that a special building material was needed to build the bastion.
, I need sir to help realize it.”
Song Yingxing, who had been silent all this time, was suddenly a little surprised and said: "Special building materials? Please let your highness know."
"cement."
Lin Jing whispered a word. In fact, he had thought about realizing cement in the late Ming Dynasty, because the emergence of this material was of great significance in this era, and it would directly change the history of human architecture.
In the current oriental architectural thinking, people are more inclined to use wood and bricks to build civil buildings, while stone is only used for public buildings such as roads, bridges, and cities. Although the buildings built are very beautiful and of good quality, on the one hand, the cost
It is expensive, and on the other hand, it has poor waterproof and fireproof performance.
With the advent of cement, concrete made of cemented gravel not only has higher strength after hardening, but also can resist the erosion of fresh water or salt water, giving the building itself a better defensive effect and extending the vitality of the building.
Especially if you use it to build a bastion, its defense effect will be greatly improved.
Tang Ruowang, who was sitting aside, had a thoughtful look on his face and asked curiously: "Your Highness, are you talking about Roman cement?"
Of course Lin Jing understood what Roman cement was. He shook his head and said: "This new type of cement is indeed inspired by Roman cement, but we need to make changes in the ratio and raw materials, as well as in the preparation process.
"
The so-called Roman cement is indeed the earliest cement product. It can be traced back to the ancient Roman period. At that time, the ancient Romans would use a mixture of volcanic ash and lime and add water to help the stones used in building houses to bond and become more stable. However, it was not yet known at that time.
Not widely used as building materials.
The reason is very simple. The "cement" of ancient Rome and the "cement" that appeared in modern times are not the same thing in the chemical sense and technical level. Cement is essentially a condensate that makes up concrete. It can become hard after adding water.
It forms lumps and firmly binds the sand and gravel together to obtain the final product of concrete.
In this coagulation process, lime is the key, like
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Natural limestone is baked at high temperature in an earthen kiln, and what comes out is quicklime. Adding water can turn it into slaked lime. If clay is added and baked at high temperature in an earthen kiln, what comes out is cement, which is calcium carbonate.
and calcium silicate, a product of silica.
The reason why cement turns into a hard lump after adding water, and the reason why it can reliably bond sand, gravel, and steel bars together, is because hydrated calcium silicate provides the required strength. However, during the firing process, it also
A product called calcium hydroxide will be produced. It is actually a pig mate and does not play a big role in the strength. Moreover, due to its congenital osteoporosis, it can easily lead to concrete leakage, penetration, cracking, etc., so on the contrary
It is a kind of resistance.
The difference between modern cement and Roman cement lies in this place, because Roman cement is composed of volcanic ash and quicklime, which contains a large amount of calcium hydroxide, while modern cement removes calcium hydroxide through firing.
To achieve this step, a large amount of fuel needs to be consumed. Generally speaking, to achieve firing of clay and lime, the temperature needs to be maintained at about one degree to one thousand six hundred degrees, and this temperature needs to be maintained for a long, long time.
Considering the huge production of cement, the energy consumed by this process is extremely staggering, and it is naturally impossible for ancient Rome to achieve it.
In fact, until the late 18th century, the British began to continuously improve the formula through practice and repeated experiments. Especially in the early 19th century, the British Joseph Asperdin discovered that the mixture of three parts limestone and one part clay
The mixture is fired into powder in a furnace, and the cement produced has excellent strength and corrosion resistance.
This kind of cement is the beginning of modern cement - silicon hydrochloric acid cement, also named Portland cement, which has epoch-making significance in the history of cement.
After Lin Jing explained the preparation method of cement in his own words, Tang Ruowang and Song Yingxing couldn't help but feel a little confused. They were both curious about why Lin Jing knew so much and also curious about it. (This chapter is not finished yet!)
Chapter 385 Ideas for new artillery
Thinking about how advanced this method is.
After a while, Song Yingxing was the first to speak: "Your Highness, you just said that lime needs to be fired in an ultra-high temperature environment, so can our current converter meet this requirement?"
"Of course it's possible. In fact, we are using a converter to make iron.
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Sometimes, limestone also needs to be added to reduce the impurities in the pig iron, so that after the steel is made, the remaining cinders and lime can be used to make cement."
Lin Jing admired Song Yingxing's reaction ability. In fact, this was within the scope of his consideration, because in a high-temperature environment, limestone itself can react with gangue with a high melting point in iron ore to form silicate components.
, it is perfect to use it to make cement.
Song Yingxing suddenly realized it and murmured: "If that's the case, then the cement thing doesn't seem to be difficult, and it doesn't even cost much. We can make cement while smelting iron!"
"Yes, this can indeed be done in the early stage, but when the usage of cement increases in the future, special cement kilns will need to be opened."
Lin Jing smiled. He knew how wide the scope of cement would be in the future. It could be said that in the industrial era, there was no possibility of surplus of this stuff. The current output is limited and can be mainly used for military purposes. When the output increases in the future,
It can be applied to the public.
Tang Ruowang couldn't help but smile and said: "Your Highness, with cement, the tactical power of the bastion in the future will be even more powerful..."
"Yes, that's why I brought it up now..."
Lin Jing had a somewhat complicated look on his face. In the original history, the Qing army would enter the Pass again this year. Although the reason was the failure of the peace talks, it was also an action taken by the Donglu to further eliminate the war potential of the Ming Dynasty.
..
In other words, even if the Ming and Qing peace talks can be negotiated, it is destined to only be an armistice. The next exchange of fire between the two sides can break out at any time and any day. Lin Jing must not place his hopes on that thin piece of paper to strengthen
The protection capabilities of various places have become a top priority.
But now Lin Jing still has one thing to do, which is to further improve the technical level of artillery. At least he needs to have powerful artillery that can be used in field battles, and this can also enhance the Ming Dynasty's chances of winning in field battles.
"Master Tang, right now I have an idea for a new type of artillery. Do you want to listen to it?"
The clear voice echoed in Tang Ruowang's ears, but it made him feel excited. This man was probably a monster who designed weapons...
(End of this chapter). _o_m
Chapter 385 Ideas for new artillery This chapter has been completed!