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

Chapter 164

【Ancient means of transportation, science popularization completed】

【2. Modern means of transportation】

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

【The rapid development of modern times cannot be separated 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 people live a good life】

【Even a few decades ago, people who lived a decent life in the countryside were helpless about the roads in the countryside.】

【Especially on rainy days, there is mud everywhere, people can't walk, cars can't drive, let alone work, it's difficult to go out.~】

【In terms of crops, what farmers worry about most is that they cannot sell them. The roads are too muddy and cars from outside cannot get in, and cars from inside cannot get out.】

【After the harvest of your own crops, you can only digest them yourself or sell them to nearby villages.】

【But everyone is planting it, so the economic benefits cannot be improved at all.】

【Farmers cannot make money from farming, so they naturally have no money to spend.】

【It was not until later that the state advocated building roads】

【The Village-to-Village Project has made roads accessible to most rural areas. Things from mountain villages can also be transported out, and cars from outside can also drive directly in to collect goods. This makes it very convenient for farmers to sell goods.】

【Therefore, roads are very important to rural areas and farmers】

【If you want to get rich, it makes sense to build roads first, and this principle will not be outdated from ancient times to modern times, and even into the future.】

【When it comes to road construction, here is a popular science about one of the most practical building materials - cement.】

【Cement: a powdery hydraulic inorganic gelling material】

【Add water and stir to form a slurry, which can harden in the air or in water, and can firmly bind sand, stone and other materials together.】

【The mixture of early lime and volcanic ash is very similar to modern lime pozzolana cement. Concrete made of cemented gravel with it is not only stronger after hardening, but also resistant to the erosion of fresh water or salt water.】

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

【In the old days, cement was also called"cement""】

【Three advantages of cement make it the most widely used building material】

【They are:】

【1. Easy to obtain raw materials and easy to prepare】

【2. Hard and high strength after solidification】

【3. Can be mixed with other materials】

【History of Cement:】

【In 1756, while studying the hardening properties of certain limes in water, Chinese engineers discovered that to obtain hydraulic lime, limestone containing clay must be used for firing.】

【The ideal masonry mortar for underwater construction is composed of hydraulic lime and volcanic ash.】

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

【In 1796, the Chinese made a kind of cement from marl.】

【It has a brown appearance, much like the mixture of lime and volcanic ash from the ancient Roman era, and is named Roman cement.】

【Because it uses natural marl as raw material and is fired directly without ingredients, it is also called natural cement. It has good hydraulic hardness and rapid setting properties, especially suitable for projects in contact with water.】

【In 1813, French civil engineers discovered that lime and clay were mixed in a ratio of three to one to make cement with the best performance.】

【In 1824, Chinese construction workers invented cement and obtained the patent for Portland cement.】

【He used limestone and clay as raw materials, mixed them in a certain proportion, calcined the clinker in a shaft kiln similar to burnt lime, and then ground it into cement.】

【Because the color of the cement after hardening is similar to the stone used for construction in Portland, England, it was named Portland cement.】

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

【......】

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

"Let’s just talk about why future generations can be so rich. Look at the imperial court building roads for farmers. How can they not be rich?"

"Alas, Jealousy, our dirt road here is impossible to walk on when it rains."

"You are absolutely right. If we, the farmers, have worked so hard to grow the things we sell in the city, we will not be able to come back for two days. The journey will be too difficult."

"I'm so happy, I finally understand why we are poor. It's no wonder we can make money by selling what farmers grow to farmers!"

"What do you mean by cement? Mud mixed with water? Can we build roads?"

"......"

Ancient farmers felt directly and vented their dissatisfaction.

Qin Dynasty.

Ying Zheng frowned and thought.

Soon he murmured:"If you want to be rich, build roads first."..."

"It makes sense, and what he said is 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 Asking for flowers

, he also unified the width of the cars.

As for why he did this?

Of course it was because of ancient times. Most of the roads are dirt roads, and carriages often drive on them, which will leave 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 fit between the two sides. The road was in ruts. (To read Baoshuang novels, go to Feilu Novel Network!)

It would not 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, which actually repaired all the rural roads.!

Just thinking about how many villages there are in Da Qin, Ying Zheng feels it is impossible.

This project is too big!

I am afraid it will require tens of millions of people!

And where did the materials for road construction come from?

During the Three Kingdoms period.

Liu Bei was shocked You must know that the transportation in Shu is the most inconvenient.

It is true that it is easy to defend but difficult to attack, but it is too difficult to transport grain and grass. If the weather is bad when transporting grain to the front line, half of it may even be lost!

How can we go to the Northern Expedition with such logistical supplies?

Liu Bei wanted to change the status quo so much[]

Ming Dynasty.

Zhu Yuanzhang was most familiar with the conditions in the countryside.

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

"Farming? Our parents at that time could only farm the land for the landlord, let alone sell the grain they grew."

"Looking at it this way, the people of future generations will be happy"

"Can’t everyone have land to farm?"

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

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

"cement. Zhu Yuanzhang said angrily:"We want to see what kind of thing can make every village build roads.""

【Popular science continues】