Tianjin Cement Factory, a huge cement furnace stands on the earth, like a giant.

Inside the cement factory, workers wearing short hair, shaved beards and masks are busy in uniform of the cement factory.

Cement is very common in later generations, is the most important building material, whether it is to build bridges and pave roads, build houses and tiles, cement is an indispensable thing, for a long time, the output of cement has even become an indicator of a country's industrial capacity like steel production.

For such an artifact, Liu Jin naturally would not let it go.

Originally, when he was in the capital, Liu Jin wanted to get the cement out, but the time was too short, and there were a lot of things to be busy on the Xishan side, and the glass and mirrors were made later, so there was no time at all.

Now to Tianjin, Tianjin needs to build a huge port and wharf, but also needs to build a lot of factories, staff dormitories, and then to build a cement road to the capital, these are large-scale infrastructure, without cement is definitely not possible.

Therefore, Liu Jin has also invested a lot of money, and the priority is to fire the cement first, and with cement, it is much easier and simpler to build infrastructure.

Otherwise, in the era when there was no cement, the adhesive used to build walls was glutinous rice juice, which was very material, financial, and more importantly, too slow.

The ancient bricks are all green bricks, the firing of this green brick is extremely difficult, the output is very low, time-consuming, labor-intensive, generally only the rich can afford to use it, ordinary people build houses more often with soil.

First, the soil is constantly stepped on by manpower or cattle and sheep, etc., and then poured into a small square, and then after the exposure of the sun, the water in the evaporation becomes adobe bricks, which is extremely labor-intensive and time-consuming, and it is also necessary to specially select a good weather time, otherwise a rain, the adobe bricks will be directly destroyed by the rain.

Therefore, this adobe house needs to overhaul the roof tiles every year, and once there is a rain leakage, it must be repaired in time, otherwise, the adobe house will be wet by the rain and will soon fall down.

If you want to engage in large-scale infrastructure, this cement must be indispensable.

Fortunately, the firing of cement is not too difficult, and the raw materials needed are lime water, clay, iron ore, coal, etc., which are basically everywhere in the north and south of the river.

After coming to Tianjin, he immediately let people start to build a furnace for firing cement, and after this period of construction, the first furnace of cement is finally going to be burned.

"Lao Liu, what good things do you have in this mysterious and mysterious world?"

When the cement was fired, Liu Jin naturally wanted to bring Zhu Houzhao over to see it once, after all, cement is such an artifact, it is too important to the Ming Dynasty.

With cement, whether it is used to build city walls in border town areas, or to build bridges and pave roads, it is an absolute artifact.

The walls of this town have been repaired, and it is not so easy for the nomads in the north to go south, and the roads have been repaired, whether it is used to transport grain, materials, or to transfer troops, it is very convenient, in the words of later generations, if you want to get rich, you must first build roads, which is the truth.

When Zhu Houzhao heard Liu Jin say that there were good things, he also followed with great interest, wanting to see for himself what the good things Liu Jin said.

"Your Highness, you'll find out later."

Liu Jin was still selling Guanzi, and pointed to the blast furnace where the cement was fired with a little mystery and said: "As long as the things in this come out, we will no longer have to worry about building roads and cities from now on." ”

"It's an artifact!"

"Artifact?"

Zhu Houzhao listened to Liu Jinniu's coaxing words, and was also full of curiosity and said: "Build roads? Building a city? ”

He was completely confused, and he really couldn't figure out what kind of artifact was in the blast furnace in front of him, which could make Da Ming no longer worry about building roads and cities from now on.

"Let's open the furnace~"

This first furnace of cement was specially asked by Liu Jin to wait for himself and Zhu Houzhao to arrive before opening the furnace.

Liu Jin and Zhu Houzhao came over, and Sun Xin, the chief manager of the cement factory, was also very clever in seizing the time and ordered the furnace to be opened.

Soon, the workers of the cement factory began to open the sealed cement furnace and began to pick out a load of cement, and some of them came to Liu Jin and Zhu Houzhao with a load of cement.

"That's it?"

"It's an artifact?"

Zhu Hou looked at the gray cement in front of him, no matter how he looked at it, it didn't seem to have any connection with the artifact, there was nothing peculiar, and there was nothing eye-catching, just like a pile of grass and wood ash.

Liu Jin grabbed a handful of cement and observed it carefully, it was similar to the cement that was cleaned up, but Liu Jin could feel that there was obvious graininess.

"It seems that the most difficult thing to fire this cement is the initial grinding process, whether it is limestone or iron ore, coal, etc., it needs to be ground into powder, the finer the better, now there is a sense of grain, obviously it is still not in place."

Carefully analyzed in my mind, limestone and iron ore are the most difficult to grind, and I am also thinking about whether to build a water conservancy grinding machine in the future, otherwise it will be difficult to burn cement comparable to later generations.

"Your Highness, don't look at this thing as gray and inconspicuous, but it is the most suitable thing to use as a building adhesive, with it, no matter how high the city wall is, no matter how tall the building, it is not a problem."

Liu Jin patted the cement on his hand and said to Zhu Houzhao with a smile.

"He's a construction adhesive?"

When Zhu Houzhao heard this, his eyes narrowed slightly, and he also grabbed a handful of cement and looked at it carefully, but he soon clapped his hands and did not study anything.

"We'll find out by trying."

Liu Jin smiled, very confident, and then gave Sun Xin a look, he also understood immediately, and he had already prepared everything according to Liu Jin's requirements.

Soon, more than a dozen workers from the cement factory came with sand and gravel, stacked the sand and gravel into a pile, and then added cement to it, constantly stirred evenly, and then added water into it, and continued to stir it with a shovel, and soon it became cement slurry.

After the cement slurry is ready, the workers of these cement factories also choose a section of the potholed road of the cement plant, use the template to support the frame, pour the cement slurry into it continuously, and then grind it flat.

In less than half an hour, a cement road with a length of more than ten meters and a width of seven or eight meters was paved, which was very fast and extremely efficient.

"This is soft, I can step on a big footprint with one foot, what's the use of that?"

Zhu Hou took care of the paving of the road, and immediately stepped on it, wanting to give it a try, and when he stepped on it, he immediately stepped on a deep footprint.