The next day, the morning glow was pleasant, and the birds frolicked.

After a busy night, everyone did not feel tired, watching the wall form, not only did not collapse, but it was very strong, and they all felt amazing, thinking of what the young master said last night, everyone can live in this kind of house in the future, one by one, they are in high spirits, and they work harder.

Qin Huaidao looked at the wall almost two meters high, and his sense of accomplishment doubled, a good news came, the mud tube was also successfully fired, Qin Huaidao picked one up and looked at it, it was very hard and strong, although it was rough, and some were deformed, but it was no problem to use it at all.

Can fire the mud tube can be fired tile, the production of the tile is also simple, a mud tube from the middle of the half is two pieces of tile, the main material is still yellow clay, add some fine sand can improve the hardness, mixed with lime can improve viscosity and toughness, avoid water seepage, do a good job of mud after drying, you can install the kiln firing.

Qin Huaidao didn't dare to do it before the lime was burned, but now it was different, and he explained the precautions and essentials to Huang Lao, so he transferred more than 100 people to start large-scale production, and then transferred a few carpenters to make long planks, and put tiles on the roof of the warehouse house in the future.

After everything was arranged, Qin Huaidao calmed down and tried cement firing.

There are two big questions in front of us, what is the proportion of ingredients? How to grind fine?

Limestone, clay, iron ore and coal are the main raw materials, respectively, how much is Yi Qin Huaidao does not know at all, it is estimated that limestone should account for the majority, clay can not be too little, iron ore is broken is iron powder slag, play a solid role, the same can not be too little, coal is ready-made.

When striking iron, the red-hot iron material will be smashed down, and there will be a layer of black on the surface, which is iron powder after cooling, but it can be purchased by an iron shop, but it is estimated that there will not be too much in Chang'an City, and it can be used for testing, and iron ore must be purchased for large-scale firing.

Qin Huaidao couldn't help but think of the eldest grandson Wuji, the eldest grandson's family has mastered several iron mines, specializing in helping the imperial court build weapons, there should be a lot of iron powder and iron slag, and when Luo Zhang escorted the coal convoy back, he told a few words, let Luo Zhang go to Changsun Chong, didn't he want to communicate between the two families? Then try the sincerity of the other party.

Early the next morning, Changsun Chong arranged for someone to send iron powder slag, a dozen cars, and said that there are many follow-ups, for Changsun Chong, these things are garbage, there is no place to pile them up, I wish someone would take them, iron powder slag mixed with some gravel, grass and trees, some dirty, you can use it if you sift it out, saving Qin Huaidao a lot of things.

I don't know the specific proportion, I can only try more, Qin Huaidao After careful consideration, he decided that limestone accounts for about 70 percent, after all, it is a big head, and ten percent of clay should be about the same, and it doesn't feel good if there is more.

Iron powder can not be more, more is not cement, into iron, one percent of the first try, not enough does not matter, next time add more, at least the burned things can be used for other purposes, more will be scrapped, as for coal, I don't know how much, for combustion, too much is not good, first ten percent try.

With the ratio, the process of grinding remains.

There is no grinding stone machine, the waterwheel has not been made, all by manual smashing, fortunately, people and siblings, these days have smashed a lot, just not small enough, can only try to burn first, if you can burn out semi-finished products is also good, at least can be used to build a dam, and so on the waterwheel to make it, the back is much easier.

Firing cement is also a technical job, Qin Huaidao has no bottom, after installing the kiln, he borrowed the method of burning lime and burned it directly, and transferred a few palace guards to follow, it is impossible to always do it himself in the future, and it is necessary to cultivate talents.

Calculating the time, there is still one last day left before the ten-day period agreed with Fang Xuanling, Qin Huaidao handed over the fire to everyone, carefully told him to return to the ancestral hall, and found two fired mud tubes, one large and one small, the bottom of the big mud tube is different from the small one, it is solid, and it looks like a container.

The bottom side has a small hole to facilitate air entry, which helps burning, and there is a circle of small steps above the opening for putting iron bars, which are overhead to facilitate air entry, and small mud cylinders are placed on top of the iron bars, and there is space between the large and small mud cylinders, stirred with lime, yellow clay and sand, and filled, which can play the role of heat insulation and stabilizing small mud cylinders.

After it was done, Qin Huaidao brought three honeycomb coals, first burned them in the furnace, and then put in the honeycomb coals, watching the honeycomb coals slowly burn, Qin Huaidao breathed a sigh of relief, ugly is ugly, it can be strong, and it can be used.

What people want is to be durable, cheap, and just right!

Many people were watching, watching the honeycomb coal burn, their eyes were shining, and they were excited, and Huang Lao couldn't help but praise: "Young master, a miracle, this is a miracle, the smoke poison of coal is very slight, if you keep ventilation, you don't have to worry about the dead at all, and you can use it in a closed home." ”

"Just open the window a little bit to ventilate." Qin Huaidao said with a smile.

Someone asked curiously: "Young master, don't you have to cook on the fire in the future, just use it?" ”

"Yes, do you see that hole down there?" Qin Huaidao pointed to the ventilation hole below and explained: "If you want the fire to be big, open it, if you want the fire to be small, take something to plug it, burn it slowly, save briquettes, and completely block it when you don't use it when you sleep at night, only leave the small hole next to it, and the fire will not go out." ”

Everything is made by everyone, naturally know that there is a small hole next to it, slightly smaller than chopsticks, everyone guesses what this small hole is for, can actually avoid the fire extinguished, isn't it not necessary to get up in the future and worry about the fire?

Everyone looked at the small hole curiously and was amazed.

Qin Huaidao continued: "When the top briquette is almost burned, you can take out the bottom one, keep the other two, and put one more on the top, so you can save a lot." ”

"You can still use it like this, so how do you take it out below?" Someone exclaimed.

"yes, how do you take this thing when it's burning?" Jia Youcai also asked curiously.

Qin Huaidao didn't explain, some things were just done once, so he came to the iron shop, lit the fire, and created a simple tongs, and when he returned to the ancestral hall, the briquettes were almost burned, under everyone's curious gaze, Qin Huaidao easily clamped the briquettes out, and everyone was stunned, it was so simple?

"It's amazing!"

"This thing can be cooked, heated, and boiled hot water when not in use."

"Yes, you can still eat it warm at any time, and you don't need to cook it anymore, it's so convenient."

"The key is not to be watched, so that you can free up time for other things."

"It's so convenient."

Everyone was amazed.

Qin Huaidao saw that everyone saw the benefits of using it, so he didn't bother to say more, and shouted: "Uncles, mud tubes, iron bars, and honeycomb coal are all ready-made, and they are also made by everyone, and they are all familiar with it, the next thing is to assemble, assembly is simpler, everyone also saw it just now, Huang Lao, arrange manpower, and strive for one per household tomorrow." ”

"Thank you, young master!" Everyone said excitedly.

The sunlight sprinkled into the ancestral hall and reflected on everyone's vicissitudes of life, with more luster, warmth and peace.

That's the sheen of hope!