Yun Xin and Liu Yiqiu looked at each other, and in their minds were the same thought: “Can you still make cement in the wilderness?” ”

The third daughter was curious about how Chu Feng’s cement would be made, and she ate it quickly, in the past, it took about half an hour to eat enough, but this time it took more than ten minutes to solve all the food.

After cleaning up the pots and pans and food scraps, the three women looked at Chu Feng expectantly.

Chu Feng laughed lightly, stood up, pulled out the water tank that was originally soaked in deer skin and jackal skin, and poured out the dirty water inside and replaced it with clear water.

He then moved the water tank containing the ash of grass and wood next to the wooden frame and put it aside.

“Chu Feng, shouldn’t this grass and wood ash be used to make cement?” Yun Xin asked in amazement.

“Yes, very clever.” Chu Feng smiled lightly, grass and wood ash is indeed the raw material for making cement.

“Can grass and wood ash make cement?” I still don’t quite believe it. Liu Yimeng shook his head violently, something so stiff as cement could be made with grass and wood ash?

“It seems that there is nothing that grass and wood ash can’t do.” Liu Yiqiu picked up her eyebrows.

She remembered that Chu Feng used grass and wood ash to do a lot of things, such as softening animal skins and using grass and wood ash, and then soap, stinky yellow wattle cool skin, etc. all used grass and wood ash.

The bullet screen in the live broadcast room brushed rapidly.

“The little book is taken out, and Chu Feng is going to make a big move again.”

“Make cement out of grass and wood ash? Sounds so unbelievable? ”

“Don’t talk in the front, it’s not good to be punched in the face.”

“That is, there are no impossible three words here in Chu Feng.”

“Front, give you fifty cents to delete the bullet screen, let me send it.”

“…….”

“Give it a try.” Chu Feng smiled lightly, poured the grass and wood ash into the water tank filled with water, and then found a wooden stick to stir the grass and wood ash and water evenly.

After more than ten minutes, letting the molten grass and wood ash settle, he found the clay pot and began to scoop the water that had turned gray and white in the water tank.

“I’ll help you.” Liu Yimeng found another clay pot to help scoop the water off.

After a few minutes, the ash and white viscous formed after the grass and wood ash melted in the water tank was left, and most of the water tank was installed.

Yun Xin frowned and asked curiously, “What are these?” ”

“These are the products of the dissolution of grass and wood ash, mainly calcium hydroxide and calcium carbonate.” Chu Feng said softly.

Grass ash contains potassium carbonate, which is harmful to cement, but in the process of dissolving in water, potassium carbonate has been melted into water and then can be separated and removed.

The rest is an insoluble paste of calcium hydroxide and calcium carbonate, which is also the key to making soil cement.

“Calcium hydroxide and calcium carbonate…” Yun Xin frowned, these are chemical terms.

Although she taught herself all the knowledge of her senior year of high school, and even taught herself a year of college, she did not understand what these two chemical components meant.

The Liu sisters are also a little confused, chemistry is not their strength, it can even be said to be a weakness.

Chu Feng smiled lightly and said, “I need your help next.” ”

“How do I get it?” Liu Yimeng asked excitedly.

“Knead all these pastes into balls and dry them on the fireplace.” Chu Feng said softly.

He reached out and grabbed a handful of gray-white paste, pressed it tightly with his hand and put it in the fireplace, using the temperature emitted by the fireplace to dry it quickly.

“It seems like it’s fun.” Liu Yimeng’s eyes lit up, rolled up her sleeves and began to pinch the ‘mud ball’.

Liu Yiqiu and the girl also took action.

Liu Yimeng held a fist-sized clay ball in her hand and asked with a smile, “Is it okay to be so big?” ”

“As long as it can be stuffed into the fireplace.” Chu Feng smiled lightly.

“Chu Feng, is this cement?” Yun Xin asked softly.

“No, two or three more steps.” Chu Feng shook his head.

The four of them continued to be busy, spending half an hour, and the fireplace was filled with large and small stucco clumps of grass and trees.

“Okay, then wait until they’re dry before we move on to the next step.” Chu Feng rubbed his fingers and rubbed off the sticky I thickness between his fingers.

“What’s next?” Liu Yiqiu asked softly.

“I’m going to go to the creek and bring some sand back.” Chu Feng said softly, the cement is ready to use sand, take advantage of the current free, first move back.

Although there is sand around the camp, it is very small, and there are a lot of sawdust blades, dirt, etc. mixed together, which cannot be used at all.

If you go to pick out the dirt and impurities, it is a waste of time and energy, it is better to go to the creek to carry some sand back.

“I’ll go with you.” Yun Xin said hurriedly.

“No, I’ll be back soon.” Chu Feng smiled lightly and reached out to rub the girl’s head melon.

It was too cold, and the girl was still better off going out a little less, and he wasn’t going very far.

“Then I…” Liu Yiqiu hadn’t finished speaking.

Chu Feng interrupted and said, “I don’t need a lot of sand, I will be transported back in one trip.” ”

“Chu Feng, what are these dumplings going to do?” Liu Yimeng asked curiously, she came to her aunt and could not follow her out.

“When they are dry, they are all tucked into the fireplace and calcined until they turn yellow and hot before they are taken out.” Chu Feng said softly.

“Got it.” The three women nodded one after another.

“I’m gone.” Chu Feng took the bucket and carried two bamboo baskets and ropes to prepare to go out.

“Chu Feng, wait a minute.”

Yun Xin shouted at Chu Feng, flipped out two sackcloth pants that had been made in the past few days from the wooden frame, and said softly: “Wear two more pants, warm up.” ”

“Can you still wear it?” Chu Feng smiled bitterly, already wearing three pairs of pants, two sackcloth and one pair of stormtroopers.

“I can wear it, I made it bigger.” Yun Xin said softly, shoving the sackcloth pants into his hand.

“All right.” Chu Feng grinned, put down the bamboo basket, took off the outside of the stormtroop pants, and then put two pairs of linen pants into it.

By the time he put the trousers on again, they were all stuffed inside, and it was almost to the limit of the trousers.

“Then I’m gone.” Chu Feng picked up the bamboo basket, pushed open the wooden door and walked out.

“Come back early.” Yun Xin stood outside the shelter door waving her hand.

“Got it.” Chu Feng waved his hand without returning and braved the light snow to walk towards the stream.

When he got up this morning, he had seen the sky, and it would snow lightly today, but it did not affect travel.

After a few minutes, Chu Feng came to the edge of the shallow stream, which was relatively flat, and the sand would be left here after the stream was washed.

The main thing is that you don’t get your feet wet.

After he put down the bamboo basket, he used a sapper shovel to shovel away the thin ice and snow layers on the beach, revealing the sand below, as well as some stones of different sizes.

“Don’t want a stone that’s too big.”

Chu Feng used a sapper shovel to pick apart the larger stones and shovel the sand and small stones below.

“Click, click, click…”

The sound of the sapper shovel rubbing against the gravel sand makes people get goosebumps up, which makes people feel very harsh.

Half an hour later, both bamboo baskets were filled with sand.

“It’s time to go back.” Chu Feng straightened his waist, shook off the snowflakes on the bucket, and moved his body.

He bent down to carry the basket, and the other basket was carried in front of him, stepping back on the thick snow.

———————————–

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