Dai Can defeated his father

......

Dongshan North, Abandoned Mine Pit.

Qin Xiaoman looked at the five mountains that had been hollowed out in front of him, estimated it, and estimated that it covered an area of at least a thousand acres, and then looked at the few crooked-necked trees on the mountain, he nodded with great satisfaction.

"Yes, there is not even grass growing on this mountain, which is exactly what I want. "

Lord Prefectural, find someone to go to the front mine to borrow some tools and miners for quarrying and transporting stones.

Qin Xiaoman got off his horse, and he turned along the blue and white crushed stones piled up on the edge of the abandoned mine, looking at the dark cave and the traces of burning stones when extracting copper ore nearby, and nodded incessantly.

It works.

"Don't be stunned, go borrow tools. Zhang

County's order was dispatched, but he was confused and asked puzzled.

"Childe, aren't you here to cut down trees? Why do you want to quarry and transport stones? You want to build a house with stones?"

Qin Xiaoman thought that he had said it so clearly, and it was not surprising that Zhang Xianling could guess it.

"Childe, I have seen many tenants of farms in the north of the capital who build pigsty and chicken coops with stones, saying that the heat is good for heat dissipation, warm in winter and cool in summer, and some can also live in people, but the soil and stone structure there is stable, and Rongzhou is sunny and rainy, and the continuous drizzle can be washed away.

Zhang Xian Ling persuaded him earnestly.

"Childe, it's about the lives and safety of the people on Sweetwater Street, please think twice. "

I've thought twice, look at this.

Qin Xiaoman did not refute Zhang County's words, but took out the "Great Dry Miscellaneous Records", turned to the page he marked, and pointed it out to Zhang County.

"In the Jiangnan stone house, watching the rain fall outside, hearing the drums on the river, the dragon boat race began...... Lord of the county order, the rainfall in Jiangnan is not less than that of our Rongzhou, it can be made into a stone house, and so can we.

This "Miscellaneous Records of the Great Qian" was written 10 years ago, and it tells the story of what a person who traveled from south to north saw and heard in various parts of the Great Qian.

The customs and customs in the book are all words, not fiction.

"But there are only a few stone houses in the south of the Yangtze River, and it takes manpower and material resources to take care of them every year to ensure that they don't fall, does Gongzi think the people of Sweetwater Street will agree?"

Zhang Xianling glanced meaningfully at the author's name of "Da Qian's Miscellaneous Records" and retorted in a low voice.

"The county magistrate is really knowledgeable and thoughtful, and he knows everything about northern Shaanxi and Jiangnan very clearly.

Qin Xiaoman praised sincerely.

Zhang Xianling's face changed slightly, and he smiled, but he didn't explain.

"Lord County Order, look at this paragraph again......

" Qin Xiaoman turned to the back of "Da Qian's Miscellaneous Records" again.

"The children on the Zhuangzi built a house for the chicks with gravel, and the glutinous rice left over from the eating and the stone powder burned on the ground also melted into it, and the chicken coop formed the next day was rough, but it was strong and kept out the rain, I arranged it for them, and they invited me to eat chicken together at the end of the year......"

Qin Xiaoman couldn't help muttering when he saw this passage.

"I don't know if this author ate chicken at the end of the year?"

Otherwise.

This thoughtful author should have been able to find that the chicken coop made by the children has withstood the wind and rain...... You might even find something new.

"Childe, you pointed out that this is ...... What do you mean?"

Zhang Xian Ling's voice lowered, wiping the beads of sweat that appeared on his forehead.

Qin Xiaoman was also sweating from the sun, and seeing that Zhang County's cognition still had certain limitations, he also threw bricks and bricks anyway, so he announced it directly.

"I'm going to use the discarded rubble to build a house, or at least the maintenance you mentioned, I don't think the house needs regular maintenance as long as it's strong enough.

"The stone house wants to be strong, one depends on the mixed structure of stone and wood, and the other depends on the means of adhesion between the stones.

Qin Xiaoman pointed to the powder in the waste ore pile in front of him.

"I'm going to use the burnt ash of the stone as a mortar to fuse it between the stones, and add some sticky stuff that should make it stronger.

He wanted to use lime to connect stones to build a stone house to solve the current crisis of lack of building materials.

However, lime needs to be calcined at about 1,000 degrees Celsius to complete the extraction, and with today's technology, it can only be turned into lime by burning it with firewood for seven days and seven nights.

Fortunately.

He had ready-made lime in front of him, and he didn't have to burn it that long.

"How long does it take for the stone to burn to ashes...... Childe, there is stone ash here!" Zhang

Xianling said, looking back, and finally knew that stones could be found everywhere, why did Childe bring him to the abandoned mine.

After mining, it is necessary to test the degree of ore content in the stone, which is often mined and burned to calcine the ore to purify the ore.

It is because this mine has existed for hundreds of years, it has long burned the vicinity to the ground, and the geothermal heat is difficult to disperse.

Layer after layer, the black soil is covered with white ash and gravel, and the cycle ...... back and forth

"Childe came with me, and I remember that this was the largest calcining pit I've ever seen since I took office. Zhang

Xian Ling raised his feet and ran in the direction of the east.

Qin Xiaoman quickly caught up.

According to the Zhangxian order, the mine was only recently abandoned.

Then before abandonment, the ore in several pits must have been mined for purification, and after burning for many days, it was found that it was all waste rock and there was no copper ore before it was abandoned.

And the melting point of copper is just above 1,000 degrees!

"I will dig the ashes burned by the predecessors."

Qin Xiaoman folded his hands and bowed to the abandoned mine.

"I hope there are enough limes......"

Before the words fell, he saw that Zhang County's order stopped.

"Childe, this is it...... Ahem...... Childe be careful, these powders choke people, and they must be washed with water if they are confused, and no one dares to come ......to the waste mines,"

Zhang Xian Ling covered his mouth and nose with a handkerchief, and said hesitantly.

Qin Xiaoman also did the same.

Fortunately, today is a sunny day without wind and rain, so you don't have to worry about lime powder hurting your eyes.

He walked a few steps with Zhang County's order, and there were still ten steps away from the edge of the pit, and when he saw that the pit was full of powder, he gasped and was overjoyed.

This is a naturally formed slaked lime under the harmony of rainwater

! There is also a lump of quicklime in the pit, and when the time comes, it only needs to be mixed with water to turn into mature lime, and it can be used as an adhesive gel for building stone houses!

"Childe, do you think these lime powders can be used?"

Zhang Xian Ling was about to go forward, but was dragged back by Qin Xiaoman.

"These are enough to build houses.

Qin Xiao had a smile between his eyebrows and eyes.

The stones and slaked lime were transported back to Sweetwater Street, where they were built into an indestructible house.

There is one more building material to choose from in the construction building materials after the Great Qian.

"My lord, the tools and miners have been dispatched!" the

officials drove the group to run.

Qin Xiaoman saw that in addition to the linen clothes worn by these miners, their shoulders, knees, and heads were covered with oilcloth, and only a pair of gray eyes were exposed, and he knew that this was a tool to prevent body wear and tear when going down the mine.

Now he even saved the effort of hiring someone to order protective clothing.

"Lord County, send some people to clean up the white powder in the pit, load it into a truck and cover it with a tarpaulin and transport it to Sweetwater Street, and then send some people to pick some square gravel and transport it to Sweetwater Street.

"Is that all it take?" Zhang

Xianling was skeptical.

It was the first time he had heard that the powder from the burning stones could be used to build a house.

If it really works, then these abandoned mines of the imperial court can be reused.

"Try it, anyway, you don't have to spend money except for work.

Qin Xiaoman looked at the miners.

"I'll pay them today.

"I have accepted the kindness of the son on their behalf, but these people are all criminals who work and have no wages...... By the way, there are some people among them, and Childe also knows them.

Zhang Xian Ling deliberately gestured to the three people standing at the end of the line trembling.