After this attempt, Chen Zhe successfully found the correct ratio of burned clay bricks. Before nightfall came to the island, Chen Zhe hurriedly took Yan'er and the Qiao sisters to work overtime to make a batch of new clay bricks.

During the production process, Yan'er and the others also remembered the proportion of the mixing of various auxiliary materials, and also learned the method of kneading bricks.

Chen Zhe specifically instructed Yan'er: "Yan'er, I will continue to transport clay on the mountain tomorrow morning, and the supply of raw materials must keep up.

But the progress of burning bricks cannot be lost, so tomorrow you will be responsible for burning bricks in the brick kiln, okay?"

Yan'er has a very good memory and can remember everything you have read once.

After Chen Zhe kneaded two bricks, she completely remembered the ratio of clay bricks and the process of burning bricks.

"Don't worry, Brother Chen, I promise to complete the task." Yan'er said confidently.

Chen Zhe smiled and nodded, and sent a new batch of bricks into the brick kiln to fire. In this way, when you arrive at the brick kiln tomorrow, you can directly take out a batch of fired clay bricks.

After sealing the brick kiln, the sunset in the sky finally fell into the sea level.

There were shrill howlings from the woods in the distance, sounding like some type of large carnivore embarking on its hunting journey.

"It's dark, let's go back to the camp quickly." Da Qiao said with some trepidation.

"Yes, yes, I hope there will be no wild beasts coming to make trouble tonight." Xiao Qiao said with a frown.

"Bao, bah, bah, bah! No crow's mouth is allowed!" Da Qiao stretched out his slender fingers and pinched Xiao Qiao's face.

Xiao Qiao was pinched into a "persimmon cake face" by her sister and said angrily: "Stupid sister, I know how to bully me, hum..."

Everyone was amused when they saw Xiao Qiao looking angry.

This girl has a characteristic - as long as she gets angry, others will find it funny.

At this time, Chen Zhe comforted the sisters softly and said, "Don't worry, I will go to transport clay tomorrow morning and start building walls in the afternoon. As long as the burned fence is built with clay bricks, we don't have to worry about the invasion of wild beasts.

We can replace the parts of the fence slowly. This is a long job and you don’t have to rush to finish it in one or two days.”

After hearing this, Da Qiao and Xiao Qiao nodded repeatedly.

When they are with Chen Zhe, the sisters feel endless sense of security.

...

The camp was very peaceful that night, and no new beasts came to make trouble.

Chen Zhe and the others were also lucky enough to have a stable sleep, which was very helpful for their physical strength.

When the sky in the east turned white, Chen Zhe and the others got up one after another.

Today, there are two main tasks - transporting clay down the mountain and firing clay bricks.

Chen Zhe and the three girls were divided into two groups and completed two tasks respectively.

Chen Zhe and Xiao Qiao are in good physical strength and are responsible for digging clay with heavier physical strength.

Yan'er and Daqiao belong to the "technical flow" type. Yan'er has a good memory and clearly recorded the auxiliary materials ratios of Chen Zhe's fired clay bricks. Daqiao is more meticulous, works more seriously, and has a good chemical foundation. It can provide great help to Yan'er.

After the division of labor was completed, the two groups of people started working hard. Chen Zhe and Xiao Qiao pushed the cart up the mountain, while Yan'er took Da Qiao to the brick kiln to burn bricks.

In the blink of an eye, Chen Zhe and Xiao Qiao transported back and forth three times, and more than 600 kilograms of clay were transported from the mountain to the bottom of the mountain.

Yan'er and Daqiao also made two batches of high-quality clay bricks. The clay bricks stored outside the brick kiln are now on a small scale.

After lunch, Chen Zhe did not continue to transport clay on the mountain.

It's time to start building walls.

Since there are enough clay bricks, the location where the burned fence can be built with brick walls.

Build the wall early and you can end the hard days of taking turns vigil early.

So Chen Zhe took the girls to carry the clay bricks next to the brick kiln back to the camp, and then started the work of building walls.

Dig a circle of "trench" along the original fence, which is the foundation of the brick wall.

Just like building a house, building a wall requires foundation, so that the brick walls built will be stronger and will not collapse easily.

However, just after the foundation was dug out, Yan'er asked a sharp question:

"Brother Chen, if we want to build a wall, do we still need cement mortar?"

The so-called cement mortar is a kind of construction auxiliary material made by mixing cement and sand in a certain proportion. This auxiliary material is the adhesive used when building walls. Its function is to glue one piece of separate bricks together.

Without cement mortar, the bricks are scattered separately. The brick walls built in this way have no cohesion and will fall apart after a slight touch.

When Da Qiao heard Yan'er's question, he was also worried.

"Yes, it's not enough to build a wall tiles. We still lack cement mortar. Chen Zhe, what should I do?"

Chen Zhe was confident and said calmly: "Don't worry, I've found it long ago."

"Have you found the cement mortar?" Yan'er asked in confusion, "Brother Chen, are you kidding? There is a lot of sand and soil on this island, but where does cement come from?"

Before Chen Zhe could answer, Xiao Qiao, who had been following Chen Zhe up the mountain to dig clay in the morning, suddenly said thoughtfully: "Wait... Chen Zhe, the bucket of dusty things you went to dig in the morning...is it just cement?"

"Hmm?" Yan'er and Da Qiao both looked at Xiao Qiao curiously, wanting to see what the "gray" thing she said was.

At this time, Xiao Qiao turned around and returned to the wheelbarrow, picked up a heavy wooden barrel and walked over with difficulty. He saw that the wooden barrel was indeed filled with gray substances similar to ash, and it looked indeed "gray".

"This is..." Da Qiao pointed at these gray substances and asked Chen Zhe.

Chen Zhe smiled and explained: "These are volcanic ash, that is, the ash deposited after the volcanic eruption. Since we have a volcano here, I guess volcanic ash is also very common. As expected, when I was digging clay in the morning, I looked around and found it very easily."

"Volcanic ash..." Yan'er and the others understood the true face of this gray matter.

Chen Zhe continued: "In fact, early cement was made of volcanic ash, which is natural cement in nature. If you want to make adhesives for wall building, you do not necessarily need cement mortar. Use volcanic ash and sand to mix them in a ratio of one to seven, and you can also make qualified adhesives.

In addition, the clay itself can also be mixed with sand and soil to mix adhesives with good viscosity; there are also gums in rubber woods outside the camp, which can also be used to bond clay bricks...

As long as you are willing to use your brain, isn’t it easy to solve the adhesive?”

Hearing this, Yan'er and the others couldn't help but admire Chen Zhe. When they were still worried about the lack of adhesive for building walls, Chen Zhe had already come up with many solutions and directly solved the problem.

Yan'er couldn't help but smile ashamed and said, "I was worried about it. I knew that Brother Chen was here, so I didn't need to worry about it."

Chen Zhe smiled and pinched Yan'er's delicate nose, and her nose was covered with mud from burning bricks.

"Okay, since the materials are all ready, let's start working now!"
Chapter completed!