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Chapter 658: Burning Limestone!

When it's almost burning, open some space in the middle of the charcoal and put some of the prepared limestone powder and clay powder into it.

Then a big stone slab was brought and the earth and stone stove was covered.

Looking at the earth-and-stone stove that was leaking air everywhere, the teenagers were all excited and excitedly discussing what interesting things would come out of it.

Su Chen raised his head and looked at the sky, crying silently in his heart.

If it can be fired successfully... one possibility is that lime is mixed with clay to lower the temperature at which the clay sinters.

However, is this possible?

It seems that after more than ten years of studying, the teacher has never told such magical things, right?

Limestone can also be used as a catalyst to lower the melting temperature?

When working people in ancient times used clay to make porcelain, they built stoves with such good sealing properties just to increase the temperature for burning charcoal. It was not easy to sinter clay.

Therefore, Su Chen didn't have high hopes for the earth-stone furnace to burn cement.

An hour passed, and Su Chen saw that the charcoal inside was almost burning..

He called over the teenagers who were playing in the water, climbing trees, and quarreling. They used thicker branches to pry open the hot stone slabs, and then they couldn't wait to look inside.

Well, in the middle of the burnt charcoal, there is a pile of gray-white powder mixed with many dark-brown dried mud particles.

Don’t look at it, it’s definitely not burned.

Brother said that this clay is not easy to burn!

Those dark brown mud particles are the clay from before.

Pushing aside the unburned charcoal, carefully moved the gray-white powder to a clean stone, cooled it, and then put a little bit of the gray-white powder on the palm of his hand and dripped some water on it.

"Hot...the limestone is almost there."

Su Chen felt the temperature in the palm of his hand.

In his previous life, his father was a plasterer. When mixing lime, his father always told the children to go away.

Because when lime and water are mixed together, a lot of heat will be released.

Chemistry teacher During class, I also told everyone not to get lime into their eyes, and not to wash them with water, otherwise they will burn!

Clay is not easy to burn, so just don’t use clay!

Su Chen will no longer experiment with the remaining two proportions. Limestone and clay, directly mix the burned lime and powdered gypsum together.

OK!

The cement is made!

Mix the cement with water until it becomes thick, throw in a few pebbles, mix well, and then let it I did it myself!

Sand is usually used when making cement at construction sites, but where can I get sand in these mountains?

There were several sand dredging boats in the two rivers around my hometown in my previous life. Let’s go and have a look in the river at the bottom of the mountain. It should be able to Seeing the sand.

After doing this, Su Chen took everyone back.

The little scholar asked what the lump was, but Su Chen didn't answer.

He was still not sure whether the so-called cement was real cement or whether it could be Solidification, everything will have to wait until tomorrow to know.

Looking at the sky, there is still some time before lunch, Su Chen asked five friends to carry the empty load and follow the stream to the foot of the mountain. When the stream reaches the foot of the mountain, it will gather several streams and springs, then The water flow increased and became a large river.

This river flows around several mountains and flows southeast. It is said that it will eventually merge into the Lu River and then into the Gan River.

Su Chen easily A lot of river sand was found on both sides of the river, but there was a lot of mud in it._Fei

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