Emperor of the Tang Dynasty

"—Because this cement is undoubtedly the strongest weapon for my Tang Dynasty to defend my family and the country!"

Chapter 788 On-site upgrade of concrete!

"The most powerful weapon to protect the family and the country?!"

The person in charge was taken aback by Li You's bold words, but Li You said again: "However, if you are surprised now, it is still too early."

"Didn't you just tell Gu that you've never seen such a hard material? Actually, you're wrong! The cement is far from over. The hardness of the cement itself is not as good as many stones."

Li You said with a slight smile, the greatest significance of this cement in protecting the home and the country is actually used in civil buildings.

With cement, it is very quick and easy to create windproof and watertight houses for many poor people, and truly realize tens of thousands of Ander mansions!

In this way, there will be fewer ordinary people who are frozen, and the "Nine [-]" country will be much more stable, which can be regarded as protecting the home and the country in another sense.

Moreover, what Li You valued most was relying on cement to pave the road and build the ground!

The cement road is definitely better than the various messy roads in Datang. Not only is it simple to construct and cost less, but it is also more stable and smooth. With these advantages, it can quickly cover the major traffic requirements of Datang. road.

And when the cement road is completely paved, Datang's traffic will be several times smoother than it is now, and the mobility and business convenience it can bring will instantly enhance Datang's national strength!

However, even if cement has these advantages, if you want to use it to defend the city, it is still far from enough.

Fortunately, Li You still has his own way.

Since the strength of the cement is not enough, then replace it with concrete!

Concrete is an engineering composite material that is mixed with water such as cement, sand and stone to form a whole. Specifically, cement is used as a cementitious material, and then sand and stone are used as aggregates, which are mixed with water in a certain proportion. Cement concrete can be made!

That is to say... Now that there is even cement, are you afraid that concrete cannot be made?

"Today, I will upgrade the concrete on site!"

Li You's confident policemen continued to experiment with cement. This concrete has been an indispensable and important material for civil engineering until the modern times of later generations, which shows its excellence.

Compared with cement, concrete is higher in hardness and better in durability, and the air-drying time is far less than the time required for cement. The defensive power of all the walls of the era!

"What?" The person in charge was taken aback when he heard Li You's words, "Can you use this to make something harder?!"

What he just said means that it is rare to see such a hard thing made by human beings, but from the words of His Royal Highness, it seems that the thing called "concrete" that will be made next is stronger than the rocks outside. Even tougher!

"Of course, as long as it is made well, it is not impossible to make concrete harder than granite!"

After Li You ordered everything, he patted the person in charge on the shoulder encouragingly, and then walked away.

"This is a matter of merit, so just work hard!"

Li You's words were not fictitious or exaggerated.

The manufactured cement concrete is not all the same. According to the different proportions, the concrete has different strength grades.

According to the "Code for Design of Concrete Structures", ordinary concrete is divided into fourteen grades, namely: C15, C20, C25, C30, C35, C40, C45, C50, C55, C60, C65, C70, C75, C80.

When the strength grade of concrete is greater than C25, the hardness of concrete is harder than that of moderately weathered granite, and when the hardness of concrete is greater than C50, its hardness is already harder than that of lightly weathered granite!

It is conceivable that if cement concrete with a hardness of C80 can be produced, how exaggerated it will be!

Moreover, in the Tang Dynasty, even the outer walls of the imperial city used rammed earth walls, let alone the city walls of Songzhou...

It itself is far less hard than granite, and after being built for so long, it has already been severely weathered, and its hardness is even much lower than that of heavily weathered granite!

Therefore, as soon as Li You's upgraded concrete comes out, even compared to the brand-new rammed earth wall, it can be instantly killed!

……

Outside Songzhou, in the Tubo military camp.

"Today's battle is over. It seems that there are many more reinforcements from Tang Jun. It seems that Chang'an has finally reacted."

In the tent, Lu Dongzan, the current prime minister of Tubo, respectfully said to a young man in front of him.

Speaking of this Lu Dongzan, he is a famous military strategist and statesman in Tubo, even in later generations, he is the only one who can make him so respectful - the current top leader of Tubo Songzan Dry cloth!

"In terms of scale, is there probably another [-] soldiers and horses?"

Songtsen Gampo was neither arrogant nor impetuous, but calmly analyzed.

As a historical celebrity with the same name in history, Songtsen Gampo is also a great man with great talent and strategy.

Judging from the fact that he was able to sit firmly in this position at a young age, we can understand that Songtsen Gampo is by no means a simple role, and now that Songtsen Gampo has been in power for six years, he is no longer the stunned young man he used to be. Become more mature and scary!

"Yes," Lu Dongzan responded, "It is said that the prince of Tang State personally led the army to go on an expedition!"

"Prince of Tang country?"

Songtsen Gambo frowned and said, "Is that Li Chengqian? I heard Ma Dongjia said that Li Chengqian was only a generalist, and he was so easy to defeat in a military strategy. What precautions are needed."

However, Lu Dongzan shook his head and said, "I wonder if Your Majesty remembers it or not, Ma Dongjia also mentioned that there was a prince in the Tang Dynasty named Li You, who was a formidable enemy in military strategy?"

Chapter 789 The Emperor and Prime Minister of Tubo

"You mean...that Chu King Li You?"

Songtsan Gampo was stunned and said: "It is said that Li You, the king of Chu, was unknown until last year, and he was even regarded as the lowest prince. It's hard to imagine what he can really do in the military strategy. Outstanding achievement."

"Your Majesty, people can change, and maybe he was hiding before?" Lu Dong shook his head in disapproval.

"After all, during such a bloody competition for the throne, hiding clumsiness can be regarded as a means, and it is enough to see how difficult this Chu King Li You is just from the fact that he was able to successfully hide from everyone for several years. !"