"Woo ......"

As the water in the skin pouch was poured on the quicklime, there was a sudden sound of sizzling.

The water poured on the quicklime quickly reacted violently and began to bubble continuously.

At the same time, water vapor, like smoke, also rises.

"Is this stone still so hot?"

Seeing this scene, Yong suddenly asked with a shocked face.

On the side, the old craftsman and the other two craftsmen also widened their eyes in shock at this moment.

Especially the two craftsmen, their eyes were about to pop out.

You know, the two pieces of quicklime on the ground were just pulled out of the furnace by their own hands.

But at that time, they didn't feel the slightest bit hot!

"This is just the exothermic phenomenon of quicklime when it encounters water, not that it has a very high temperature itself. ”

Looking at the stunned expressions on the faces of the four people, Lin Luo explained out loud.

When quicklime matures in water, it releases a lot of heat, making it look like pouring water on a hot stone.

Therefore, Lin Luo can understand their misunderstanding very well.

"Can a stone heat up when it encounters water?!"

Hearing Lin Luo's words, the old craftsman's eyes suddenly widened.

He is a veteran craftsman, and he has polished countless stone tools, and it can be said that he has worked with stones all his life.

But this is the first time he has seen a stone that becomes hot when it encounters water.

So, while speaking, the old craftsman also bent down and reached for the quicklime on the ground, wanting to verify it for himself.

"Don't touch it!"

Seeing the old craftsman's actions, Lin Luo hurriedly spoke out to stop him.

It is important to know that the heat released by quicklime during the maturation process when exposed to water is not to be underestimated, and the maximum temperature can reach 700 degrees Celsius.

If you touch it with your hands, you will definitely get burned.

Therefore, after Lin Luo stopped the old craftsman's movements, he said to him with a serious expression: "After the quicklime encounters water, the heat released is like a flame, and it must not be touched with your hands. ”

"Yes. ”

Hearing this, the old craftsman nodded in response, and immediately retracted his hand.

Just now, although his hand hadn't touched the quicklime yet, he had already felt a scorching temperature when he approached.

I already believed in my heart that this stone, called quicklime, could really release a scorching heat like a flame when it came into contact with water.

As they spoke, the two pieces of quicklime on the ground quickly shattered and expanded in a violent reaction.

After that, it collapsed into a puddle of lime slurry.

It can be regarded as a completed maturation, from quicklime to a commonly used building material - hydrated lime!

This is an indispensable building material for him to build a city.

After all, he couldn't just build up those stones layer by layer.

Between the stones, there must be an adhesive to bond them.

Among them, lime is an absolutely indispensable material.

As for how to produce lime, the method is actually very simple.

All natural rocks with calcium carbonate as the main ingredient will undergo oxidation reaction after calcination at high temperature and turn into lime with calcium oxide as the main component.

The main component of limestone is calcium carbonate.

Therefore, Lin Luo simply prepared to directly use the waste, and transported all the limestone crushed stones produced in the excavation down the mountain to be calcined into lime.

After that, Lin Luo checked the other quicklime in the furnace and found that the overall was not bad, but some of the calcination was not sufficient.

Let the old craftsman add some more time in the next calcination.

At the same time, it is also solemnly instructed that the calcined quicklime must be stored well, and it must not come into contact with water.

In this way, after explaining all the things that should be explained, Lin Luo left the stone refining workshop with Yong.

At this time, outside the construction site of the moat, a team of twenty totem warriors had been waiting for a long time.

"Let's go, let's go!"

After Lin Luo arrived here, he didn't say any nonsense, and directly waved his hand and gave the order to set off.

"Lin Luo, are we going hunting?"

On the way to the road, Feng ran a few steps to catch up with Lin Luo, and asked out loud with anticipation.

"It's not. ”

Looking at Feng's expectant expression, Lin Luo directly and ruthlessly shattered his beautiful imagination.

This time, Feng followed him to the construction site of the castle.

Compared to ordinary clansmen, powerful totem warriors are undoubtedly a better workforce.

Not to mention, Feng is still a powerful bloodline warrior.

When it comes to work, one person can withstand dozens of ordinary young and strong laborers.

Therefore, Lin Luo naturally would not let go of such a good labor force, and always let him be responsible for the heaviest work of rock excavation.

This time, it was also because there was something more important that he came over.

But obviously, this is not a hunt.

Therefore, after hearing Lin Luo's words, the expression of expectation on Feng's face suddenly collapsed.

I can only silently calculate in my heart how many more days I will have to wait for the next time it is my turn to carry out a hunting mission.

"So what are we going to do?"

When Feng heard that he was not going hunting, he immediately lost interest in continuing to ask, but Yong was very curious about what he was going to do this time.

After all, their most important task at the moment is to build the city.

And Lin Luo took twenty totem warriors directly from the construction site this time, which is a large group of laborers!

If it weren't for something very important, he wouldn't have done it.

And Yong's words, as if reminding Feng, made Feng's eyes light up instantly, and thought of another possibility.

Suddenly, he asked excitedly, "Are you going to attack other tribes?"

If you want to speed up the construction of the city, you must have more labor.

And the easiest way to obtain labor is to plunder the population directly by attacking other tribes.

"It's not. ”

Lin Luo spoke again, and the rekindled hope of fighting was ruthlessly shattered again.

"And what are you going to do here?"

The two consecutive disappointments made Feng's mood extremely bad.

"Go find a material that works with lime. ”

This time, Lin Luo didn't sell Guan Zi again, and replied directly.

"Lime?

Hearing this, Feng suddenly looked confused.

He didn't go to the stone smelting workshop with Lin Luo, and he didn't know what lime was.

"Do you need to add other materials to the lime before it can be used?"

On the side, Yong asked Lin Luo in surprise.

He had already learned from Lin Luo that lime was used as a binder.

But I didn't expect to add other materials.

"That's right. ”

Lin Luo nodded slightly.

In order to build a stronger wall, it was necessary to add more materials than just lime.

And this time, Lin Luo personally led the team out in order to find another indispensable material besides lime.

......

In the rush of everyone, it took them nearly three hours to finally reach their destination.

"I really didn't expect to be able to come back here again!"

Looking at the familiar valley not far away, Lin Luo couldn't help but sigh.