New horse-drawn carriages and horse lanterns began to appear in the market in various places, and these two goods became a new source of wealth in Liu Yan's hands in one fell swoop.

Later, Liu Yan ordered a new workshop to be built in the Aoshan Acropolis, and handed over a plan drawn by himself and some relevant instructions to Shen Tuo, the official of the Aoshan Guard, and ordered Shen Tuo to mobilize people and craftsmen to build it as soon as possible.

Because Liu Yan had just built a large construction project in the Lingshan Acropolis, so that the surrounding craftsmen knew that Liu Yan was generous and would never be in arrears. Shen Tuo, the guard officer of Aoshan, quickly recruited enough men to begin breaking ground on the north side of the Aoshan Acropolis.

With the blessing of sufficient manpower and a large amount of money and food, it only took more than half a month for the new workshop to take shape and have a rough appearance. It's just that there are still many details that need to be rectified, but it will not affect the normal production.

Although the new workshop has not yet been completed, Liu Yan can't wait, because according to Liu Yan's understanding of history, the imperial court will soon have to pay the local salaries, and a few months later, an unprecedented drought and locust plague will break out in various parts of Shandong.

So Liu Yan took Song Gongming to the new workshop that was stepping up the finishing touches, and the two of them came to the outside of the workshop under the escort of dozens of personal guards, Liu Yan pointed to the new workshop that covered a large area, and said to Song Gongming: "After this new workshop is fully completed, it will produce something called cement, as long as the cement is sold, you can earn a lot of silver!" Moreover, the cement industry will have a considerable scale, and a lot of people can be resettled in the future, so that the military households of Aoshanwei and Lingshanwei will become rich. ”

"Cement?"

Song Gongming was stunned when he heard this, mud is mud, water is water, what is this cement? And, even if cement can really sell well, how many people can be accommodated in the production of this kind of thing?

Looking at Song Gongming's expression, Liu Yan couldn't help but smile.

In the words of later generations, the cement industry is a labor-intensive industry that can accommodate a large number of manpower. Moreover, the profit from the sale of cement is considerable, not to mention the usefulness, it can be said that as long as it is related to the construction, cement will be used, so the prospects of this industry are also very considerable.

In fact, the production method of soil cement is not difficult, but at this time of the process level, soil cement still cannot be like the later generations of industrial cement, truly "reinforced iron bones". However, this kind of soil cement is enough for paving roads and building houses.

The main material of soil cement is mainly composed of limestone, clay and iron powder in a certain proportion, and then finely ground into powdery raw meal, and then continuously heated in the furnace cellar to finally become a usable clinker.

Although the process is simple, the minimum temperature required for this production method is about 1,300 degrees, so the kiln for making cement must be built with refractory bricks like a steel-making furnace.

Although Liu Yan is not a professional in making cement, he is also well-informed in his previous life, coupled with the development of network information in his previous life, he is also very clear about the production method of soil cement in the countryside in later generations.

The raw materials of soil cement are very simple, clay bricks, various clay fragments, various ceramic dish fragments, and various refractory materials, such as cylinders, basins and other fragments, water quenching slag, slag ash can be, and then add quicklime, all ground into fine powder and mixed together is cement.

If you want to use it better, you can also add plaster. The production method of plaster is also very simple, that is, a small amount of gypsum ore is used to grind fine, heated with an iron pot, as long as 100 or dozens of degrees, the gypsum ore powder is fried to yellow-gray color, and it is added to the cement powder, which can be used to mediate the solidification of cement.

As for these accessories, they can be hammered with a hammer first, and then ground with a stone mill, and it is better if there is a hydraulic mill.

Then the above various finely ground materials are mixed together in proportion, which is cement, also known as mixed cement, or soil cement.

This kind of cement has good acid and alkali corrosion resistance, low early strength, but if it is heated by high temperature or steam, the strength will grow very quickly, and the water absorption is strong when used, and the heat release is low, if it is used ordinarily, it takes nearly two months to reach the strength of industrial cement in later generations. And the frost resistance of soil cement is not as good as the ordinary cement of later generations, if it is used in winter, it will need a period of curing period, that is, the ordinary maintenance of the plastic sheet in later generations, do not make the temperature too low.

However, at this time, this soil cement can fully meet the needs of the current stage. In addition, in the future, the cement workshop will continue to develop and create according to the actual situation of use, which Liu Yan believes in the ability of craftsmen at this time.

Liu Yan is very convinced and sure of the scientific and technological power of the Chinese people, if it were not for the interference of the two barbaric and backward Tatars of the Mengyuan and Manchu Qing dynasties, the local science and technology of China could develop on its own and become a kind of existence that can compete with Western science and technology, or even crush!

Now that Liu Yan has come to this era, he must do his best to change the trend of history, so that the Jiashen national disaster that should have appeared in history will completely disappear, and let China return to the glory of the prosperous era again!

Now Liu Yan knows this kind of soil cement manufacturing method, can waste bricks, waste clay, waste porcelain, waste slag, waste iron powder and other waste that was discarded before, the cost is very low, and the raw materials are very sufficient, can be mass-produced this kind of soil cement!

At this time, Liu Yan and Song Gongming entered the cement workshop and came to meet a person, this person's name is Han Feng, who was transferred by Liu Yan from the salt factory, and was originally a subordinate of Chu Yunfei, the director of the salt factory, who had some talents, and was transferred by Liu Yan to preside over the affairs of the cement workshop.

"My subordinates have met my lord and have seen Song Qianhu."

Song Gongming returned the salute with a smile, Liu Yan exchanged a few words with him, and then let Han Feng lead the way, and the three of them came to the place where Han Feng was doing business in the workshop.

Liu Yan immediately wrote down the production method of soil cement, handed it to Han Feng, and instructed: "This recipe must be kept closely, and it must not be known to a third person!" The cement workshop should produce according to this formula as soon as possible, and all the cement produced should be registered and stored in the warehouse, and it should not be sold at will, nor can it be taken out of the workshop, understand? ”

"My subordinates understand, please rest assured."

However, Song Gongming, who was listening to the side, was slightly stunned, and had a premonition in his heart: "The adults must be planning something again, those businessmen are probably going to bleed again!" ”

Liu Yan instructed some details: "If the number of broken bricks and broken porcelain pieces is not enough, build a few more brick kilns to burn bricks for use!" ”

"Those craftsmen in the cement workshop will also be strictly guarded in the future, just like the glaze workshop and the wine factory!"

Han Feng listened very carefully, and wrote down Liu Yan's instructions one by one, for fear of missing something.

"Also, the treatment of the craftsmen in this cement workshop, like the glaze workshop and the winery, should adopt incentives to ensure the output and pay attention to quality at the same time!"

Liu Yan said to Han Feng in a deep voice: "Those who indiscriminately fill the numbers, those who leak the news, and those who are passive and sabotage, you will take someone to check it out, and you will not tolerate it!" ”

Han Feng said yes again and again, Song Gongming was also shocked when he heard the words, Liu Yan usually talked softly with everyone, talked and laughed, but once he got down to business, he was like a different person, and he became decisive!

At this time, Liu Yan's face was solemn, coupled with the words he just said, which made Song Gongming's heart cold, and he said secretly: "My lord is really a bodhisattva's heart and a vajra method!" ”

"Rest assured, my subordinates will be strictly managed, and I will never let the situation of indiscriminate filling, leaking news, and passive sabotage occur, once someone is found to be impatient, I will also immediately notify the specific person in charge, and I will never delay the matter!"

"Hmm!"

Liu Yan nodded with satisfaction and said, "That's the best!" ”

At this time, Han Feng looked at the formula, and then had a question, looked at Song Gongming who was present, and didn't know whether to ask.

Seeing this, Liu Yan smiled slightly and said, "Song Qianhu is your boss, if there is any problem, it doesn't hurt to say it." ”

Han Feng clenched his fists and said: "My lord, among the few materials in the formula, the subordinates look at the others, but this lime is a rare thing, even if it is purchased from the market, it will cost a lot of money." If it is transferred from the side of Tiepu Mountain, the distance is a little far, and the cost cannot be reduced, how can this be good? ”

Liu Yan was also slightly stunned when he heard this, and then he remembered something, and said with a smile: "What's so difficult about this?" ”

"Your Excellency has a way?"

Liu Yan said with a smile: "The Aoshan Acropolis is by the sea, and the workshop can buy shells, oysters and other things from the coast, these things are all waste that fishermen don't want, and no one will ask for it for nothing, even if it is a large number of purchases, the price will not be high." ”

Han Feng asked strangely, "My lord, what's the use of buying these things?" ”

"Don't underestimate these shells and oysters, you can burn lime by burning these shells, but the production is not very large. The workshop can directly build a special lime kiln to burn the shells of shells and oysters, even if the output is small, but it can't support the large number of shells, and at the same time, it can also solve some food and add some meat to the craftsmen. ”

After listening to this, Han Feng and Song Gongming once again sighed at Liu Yan's erudition and knowledge, and they admired it even more in their hearts.

Han Feng said directly: "My lord, I will arrange people in a while to vigorously buy shells and oysters!" ”

After Liu Yan handed over the production method of soil cement to Han Feng, Han Feng took the craftsmen of the new cement workshop to rush in, and stayed in the cement workshop under construction for more than ten days, which made Liu Yan very satisfied, thinking that this is a serious and responsible work attitude.

During this period, Han Feng led everyone to use only one furnace for trial production, and also built a blast furnace for firing bricks, and temporarily purchased a large number of shells from Dengzhou. Finally, after dozens of failures, a sample of soil-based cement was finally experimented.

Han Feng looked at the pile of gray-white powder in front of him with a grim face, and suddenly laughed, like a child who saw a favorite toy, and smiled very happily.

"Quickly send someone to the Acropolis of Aoshan, please come and watch!"

Some people died, but not completely......