I make a popular science video and all the emperors learn from it!

Chapter 164

[Ancient means of transportation, popular science completed. 】

[2. Modern means of transportation. 】

[The modern history of China began in 1840 with the First Opium War. 】

[And the rapid development of modern times is inseparable from the progress of science and technology. 】

[As the saying goes, if you want to get rich, build roads first. 】

[Only with developed transportation can we better promote social and economic development. 】

[Only then can the people live a good life. 】

[Even a few decades ago, people who lived in the countryside were helpless about the road to the countryside. 】

[Especially in the rainy day, there is mud everywhere, people can't walk, cars can't go, let alone work, it's difficult to go out~. 】

[In terms of crops, the most worrying thing for farmers is that they can't sell them when they are planted, the roads are too muddy, the cars outside can't get in, and the cars inside can't get out. 】

[After the harvest of their own crops, they can only digest them by themselves, or sell them to nearby villages. 】

[But everyone is planting, so the economic benefits can't be mentioned at all.] 】

[Farmers can't make money from farming, and naturally they don't have money to spend. 】

[It was not until later that the state advocated the construction of roads. 】

[The village-to-village project has enabled the vast majority of rural areas to be connected to highways, and things in mountain villages can also be transported out, and cars from outside can also be directly driven in to pull goods, making it very convenient for farmers to sell things. 】

Therefore, roads are very important to the countryside and farmers. 】

[If you want to get rich, it makes sense to build roads first, and this truth will not be outdated from ancient times to modern times, and even in the future. 】

[And when it comes to road construction, one of the most practical building materials is popularized here - cement. 】

[Cement: It is a powdery hydraulic inorganic cementitious material. 】

[After adding water and stirring, it forms a slurry, which can be hardened in air or water, and can firmly cement sand, stone and other materials together. 】

[The mixture of early lime and volcanic ash is very similar to modern lime pozzolan cement, and the concrete made of cemented crushed stone with it is not only strong after hardening, but also resistant to the erosion of fresh water or salt water. 】

For a long time, as an important cementitious material, it has been widely used in civil engineering, water conservancy, national defense and other projects. 】

[In the old days, cement was also known as "foreign ash". 】

[The three advantages of cement make it the most widely used building material. 】

[They are:]

[1. Easy to obtain raw materials and easy to make. 】

[2. It is hard and strong after solidification. 】

[3. It can mix other materials. 】

【History of Cement:】

[In 1756, when studying the properties of certain limes hardening in water, the engineers of the country of Yu discovered that in order to obtain hydraulic lime, limestone containing clay must be used to fire. 】

[The ideal composition of masonry mortar for underwater construction is made of hydraulic lime and volcanic ash. 】

[This important discovery has laid a theoretical foundation for the development and development of modern cement. 】

[In 1796, the people of the country fired a kind of cement from marl. 】

[It has a brown appearance, much like a mixture of lime and volcanic ash in ancient Rome, named Roman cement.] 】

[Because it is made of natural marl as raw material and fired directly without ingredients, it is also known as natural cement.] It has good hydraulic hardness and fast setting characteristics, and is especially suitable for projects in contact with water. 】

[In 1813, civil engineers in the country of the Alpha discovered that lime and clay were mixed three to one to make cement with the best performance. 】

[In 1824, the construction workers of the country invented cement and obtained a patent for Portland cement. 】

[He used limestone and clay as raw materials, combined according to a certain proportion, calcined the mature material in a vertical kiln similar to burnt lime, and then grinded it to make cement. 】

[Because the color of the hardened cement is similar to the stone used for construction in Portland, England Island, it was named Portland Cement.] 】

[It has excellent architectural performance and is of epoch-making significance in the history of cement. 】

【......】

"If you want to be rich, build roads first!"

"Let's just say why the descendants can be so rich, look at the people's court to build roads for the peasants, can they not be rich?"

"Alas, red-eyed, we can't walk on the dirt road here when it rains. "

"That's right, if we farmers go to the city to sell the things we have worked so hard to grow, we won't be able to come back in two days, and the road is too difficult to walk. "

"I'm old, and I finally know why we are poor, and it's strange that the farmers can make money by selling what they grow to farmers!"

"What do you say cement is, mud mixed with water, can you build roads?"

“......"

Ancient peasants directly empathized and vented their dissatisfaction.

Qin Dynasty.

Ying Zheng frowned and pondered.

Soon he muttered: "If you want to get rich, build a road first..."

"It makes a lot of sense, and it's true. "

After he unified the six countries, he immediately unified weights and measures, in order to strengthen exchanges between various places, so that they could talk and trade normally.

0 begging for flowers

By the way, I unify the width of the car.

As for why?

Of course, this is because the ancient roads were mostly dirt roads, and horse-drawn carriages often drove on them, leaving deep ruts on the ground, that is, two deep car marks.

The purpose of unifying the width of the carriage is to allow the wheels of the carriage to get stuck in two ruts. (If you read a violent novel, go to Feilu Novel Network!)

Don't damage the road too much.

But now, the light curtain actually told him that there was a new type of building material invented by later generations, and all the roads in the countryside were repaired!

Ying Zheng just thought about how many villages there were in Daqin, but it felt unlikely.

This project is too big!

I'm afraid it doesn't take tens of millions of people!

And where did you get the materials for road construction?

Three Kingdoms period.

Liu Bei was stunned.

You must know that the traffic in Shu is the most inconvenient.

It is true that it is easy to defend and difficult to attack, but it is too difficult to transport grain and grass.

Transporting food to the front line, if the weather is bad, it may even lose half of it!

With such a logistical supply, how can the Northern Expedition?

Liu Bei wanted to change the status quo too much. []

Ming dynasty.

Zhu Yuanzhang is most familiar with the situation in the countryside.

He has lived for so many years, how could he not know?

At that time, our parents could only farm for the landlord, let alone sell the grain they planted. "

In this way, the people of the Hereafter will be happy. "

"Can everyone have land to plant?"

Zhu Yuanzhang was a little dumbfounded, mixed with a hint of envy.

When he was young, if his parents had their own land and were willing to sell it, they would not starve to death.

"Cement. Zhu Yuanzhang said angrily: "Let's see what it is, so that villages can build roads." "

[Popular science continues.] 】

[It is not difficult to say how cement is made. 】

[Please watch a short video below, you can easily learn it.] 】

【... B].