The Rise of the European Emperor

You must know that in later generations, asbestos brake pads are also a very common commodity, and there is no national ban. Of course, there must be some dangers. Because, when the car brakes, some dust is indeed generated due to the friction between the brake pads and the wheels. However, judging from the fact that later generations of countries have not banned it, there is some harm, but it has not reached a certain level. Otherwise, it would have been banned long ago.

Therefore, Marin will not prohibit the application of asbestos fibers in the production of cement boards. After all, he does not have glass fiber to replace asbestos fiber. The most important thing is - the cost...

In fact, the state-owned glass artisans in Beihai are not incapable of drawing glass. However, this kind of pure glass fiber is very brittle and easy to break, so it has no practical value. Marin remembered that the glass fibers of later generations seemed to have added many other substances. It's a pity that he is not a relevant professional and doesn't know how to do it.

Therefore, in terms of cost and technology, it is indeed a good choice to use asbestos fibers to make high-quality cement tiles.

As for the hidden danger of dust inhalation during the production process, Marin decided to promote wearing masks in the workshop to minimize the chance of asbestos dust being inhaled into the lungs of workers. In addition, Marin placed an order for the Crimean Khanate, ordering several thousand grandpas for the production of asbestos fiber cement boards. In this way, the harm of asbestos to the people of the country is greatly reduced. As for the life and death of Eunuch Mao... It would be good to put them on masks, nothing else... From the moment they were captured by the robbers in Crimea, there was no hope for them...

In fact, under the stimulation of heavy rewards, the craftsmen's enthusiasm for invention is high. No, Kaul's colleague, Craftsman Katz, proposed the concept of plant fiber concrete.

After experiments, Katz proposed the theory that using flax fiber and sisal fiber can also be filled into the cement board as "bones" to increase the strength of the cement board.

Marin also deeply agrees with his point of view. However, they are unwilling to put it into application. why? The cost is high!

If it is the most common flax fiber, the corrosion resistance is not good and the service life is not enough. And if you want to enhance the performance and lifespan of flax fiber, the best way is to soak the flax fiber with tung oil, so that the toughness and lifespan of the flax fiber will be longer than the old rattan used by the rattan brand. However, the cost is a bit higher...

As for the sisal fiber concrete... This thing has been studied in later generations, and it is a good variety. But the problem is the same - the cost is high...

The quality of sisal fiber is indeed very good, and its corrosion resistance and tensile strength are much stronger than that of flax fiber. But the problem is that there is a shortage of sisal fiber in the North Sea right now, not enough to make sails and cables, so how can there be any surplus to make cement boards?

So, despite being a good idea, Marin couldn't use it. , without him, the cost issue...

After all, it is a common material used to pave roads,

The cost cannot be expensive. Otherwise, if the road is paved too long, it will go bankrupt. Therefore, for the most common paving materials, cost is also a very important issue.

However, for the floor tiles in the palace, it seems that you can try sisal fiber concrete, or flax fiber cement board made of flax fiber soaked in tung oil and strengthened. After all, Marin is also worried about the health of his family. Although the asbestos fiber cement board is actually not dangerous, Marin dare not risk his family's health. It's okay to use asbestos fiber cement boards to pave outdoor roads, but for indoor roads, try not to use them as much as possible.

In fact, even for outdoor paving, it is not necessarily necessary to use asbestos cement boards. After all, although asbestos is not expensive, it is not cheap in large quantities.

Therefore, it is the same as the principle set by Marin before - asbestos cement boards are used on the main roads, and ordinary grade cement boards without asbestos fibers are used for ordinary trails, and the thickened type will be used to save materials. In this way, a lot of money can also be saved. At the same time, in order to avoid insufficient asbestos fibers.

But after going to church on Sunday morning (pretending to be), Marin suddenly discovered that there seemed to be an option of thatch in the plant fiber...

When he came back from the church, he passed by the slums and found those adobe houses. He suddenly thought of it—isn’t the adobe house the simplest concrete structure?

In order to make the earth wall stronger, when the adobe wall is built, thatch is often mixed into the earth wall as a "confinement" to enhance the tensile capacity of the earth wall and make it less likely to collapse.

In the same way, using thatch with good toughness as "bones" and mixing it into cement also has a certain tensile capacity. At least, it's better than a simple cement board.

Therefore, Marin asked the cement board factory to conduct experiments, and sure enough, he got a cement board with grass-reinforced concrete that was not bad. Although it is far from being compared with reinforced concrete, it is not as good as bamboo reinforced concrete. However, it is better than cement alone. Marin knew in his heart that this kind of concrete made of thatched bones was average in terms of quality and lifespan. However, that is compared with steel bars and bamboo reinforced concrete. If it is only used for paving, the concrete with thatched bones is actually barely usable.

After all, in this era, there is no such thing as a heavy truck that ruins the road. Usually, a carriage with a load of one or two tons has reached its limit. And this level of pressure, grass-reinforced concrete is still competent.

Moreover, concrete is mainly alkaline and has a certain ability to corrode. The reason why reinforced concrete is not afraid of corrosion is because steel is not afraid of alkaline environments, and can even form an alkaline protective film on the surface of steel bars to improve the corrosion resistance of reinforced concrete.

Bamboo tendons are worse, not very corrosion-resistant. However, according to past life experience, there is no problem with bamboo reinforced concrete persisting for 20 to 30 years.

The thatch is much stronger than the alkali resistance of the pillars. Although the strength is not as good, it may be stronger than the bamboo reinforced concrete in terms of service life.

The most important thing is - thatch is cheap! Thatch is cheap! Thatch is cheap! (Say important things three times)

In this age of extremely low productivity, cost is everything. Marin chose asbestos fiber, which is harmful to health, as the concrete reinforcement because the cost of asbestos is not high. At least, the cost is much lower than sisal fiber or oil soaked flax fiber.

But no matter how you compare it, there is nothing lower than the cost of thatch that can be seen everywhere. Moreover, animals don't like to eat thatch. Marin is currently promoting, plowing all the grasslands across the country, and then replacing weeds such as thatch with alfalfa and ryegrass. Now, the last thing he lacks is thatch, a weed.

Moreover, for the laying of ordinary roads, the grass-reinforced concrete made of thatch is definitely long enough. You know, in later generations, some cities will renovate their roads every year, and there will not be enough excavator graduates from Da Lanxiang. Because, to break open the old concrete pavement requires the breaker hammer of the excavator. After all, reinforced concrete is more common in later generations.

Even if the lifespan of grass-reinforced concrete is only a few years or more, it is enough. As long as it is not replaced every year, the cost can be afforded.

"I'm so stupid, really!" Marin murmured.

"Why didn't I think of cheap grass-reinforced concrete earlier?"

"I'm so stupid, really..." Marin repeated several times, and she was about to turn into Mrs. Xianglin...