Iron smelting has long been used in production, but iron is rarely used in bridge building, the reason is not that iron is not hard enough, or more fragile than wood, but that iron is hard but fragile, and cannot achieve the best effect of bridge-building, but that wooden bridges are more durable.

Also, such a long distance is still made of wooden pillars, not to mention the danger, just soaked in water, it will not last long.

This is relatively general, and for this bridge, it seems that it does not apply.

Li Zhao smiled when he heard this, but he didn't hide it.

"This is the iron smelted in my iron-smelting workshop, and it is not comparable to ordinary iron."

This remark immediately attracted everyone's interest, the same iron smelting, how can his iron be different from ordinary iron, is it this difference that is used to build bridges to make bridges stronger?

Looking at everyone's eager eyes, Li Zhao secretly laughed at the superficiality of the uncivilized people's knowledge, of course, this is also the limitation of the times.

"My iron is wrought iron, and ordinary iron is pig iron, pig iron is hard but fragile, and wrought iron has the hardness of pig iron, but also tougher, no matter the wind and rain can not damage it."

Oh!

When everyone heard this, their eyes lit up, and it was the first time they had heard of the words "pig iron" and "wrought iron", and they knew that ordinary iron was fragile, and because of this, some capable craftsmen also wanted to change its shortcomings after years of research, but with little success.

But this son, he actually did it, wrought iron, can solve such a problem called wrought iron? It was the first time everyone had heard of such a term, and they thought about it for a while.

It is completely impossible to say that Li Zhao's words are untrue, because everything just now proves this, this iron is very practical, and I don't know how much better than a wooden stake.

Wrought iron is hard and tough, which solves the problem of fragility of general iron, and solving this problem will be beneficial to all aspects!

"That's true, that's true!" Ying Zheng was excited, held Li Zhao's hand tightly, and almost shouted, "This is my good son, as smart as me." ”

But he held back.

Being held like this, Li Zhao was a little uncomfortable, and retreated very vaguely, skillfully avoiding Ying Zheng's heavy hand.

"Haha! It's my gaffe. Ying Zheng patted Li Zhao's shoulder indifferently, and immediately said, "Tell me how to forge wrought iron, I need it very much." ”

This is a bit abrupt, Li Zhao didn't know whether to answer or hide it for a while, it was not that he didn't want to say it, but that this question involved a lot of modern knowledge, and they couldn't understand it.

No, there's one thing they can understand.

He breathed a sigh of relief and said, "High temperature." ”

"As long as the high temperature can remove the impurities in the iron ore, so as to obtain wrought iron."

"High temperatures? I see. Ying Zheng nodded as if he didn't understand, and complained one after another, "Why can't that class of elm heads think of it?" I wrote it down. ”

Ying Zheng was even happier when he received a satisfactory answer, and his gaze at Li Zhao changed again and became very ambiguous, which made Li Zhao very inexplicable, but he didn't take it to heart.

It is only normal for an ancient person to have such knowledge and such a reaction.

Fortunately, he didn't ask anymore, and if he did, he really didn't know how to answer.

Ying Zheng didn't mean to give Li Zhao a chance to breathe, he thought of another question, and couldn't wait to ask: "That stone pillar is built in water, will it be washed away by the water, or will it be corroded?" He pointed to the support pillar in the middle of the river.

This question is also curious to everyone.

Their idea is very simple, this stone pillar is mud, under the flow of water, accumulated over time, it is very possible to wash it away.

But Li Zhao's answer made their eyes shine again.

"No, it's a pillar of cement, iron, and gravel, and it's so deep in the ground that even hundreds of people can't shake it, let alone the rapids."

"It's so powerful." Meng Yi was surprised.

Hundreds of people, he is a soldier of the army, naturally knows the power of hundreds of people, how terrifying it is! I couldn't shake this large stone pillar.

"Almost, the main component of this stone pillar is cement, after the cement is condensed, it is extremely hard and quite stable, coupled with the tenacity of iron, it is difficult to shake him."

Li Zhao was afraid that everyone would not understand, so he led everyone to the side of the cement road, pointed to the cement road and said: "This cement road is also made of cement, and General Meng ordered someone to destroy it?" ”

"This"

Meng Yi was embarrassed, and looked at the emperor with inquiring eyes.

You must know that this road is called the road of heaven by His Majesty, and what the road of heaven represents in His Majesty's heart, he knows very well, and if it is destroyed, he will be rebuked.

Moreover, although this road looks smooth and solid to the touch, it is just an ordinary stone, so how can it not be destroyed?

He can smash it with a single hammer.

Ying Zheng also wanted to see if what Li Zhao said was so magical, so he nodded at Meng Yi.

After receiving the answer, Meng Yi no longer had any scruples, and the anger in his heart that was despised surged into his heart, and he immediately ordered someone to find the hammer, and it just so happened that some of the guards used a hammer.

The hammer in his hand, although it is not a commonly used weapon, nor is it a thing to take advantage of, but Meng Yi is so calm and powerful in his hand, he dares to guarantee that a hammer will definitely break the cement road.

Without any preparation, he raised a sledgehammer and hammered it down.

(End of chapter)