Wang Luobin purchased a complete set of small cement equipment for producing cement using the vertical kiln method, but this equipment requires a large amount of coal to operate, and the time travelers do not have coal yet.
Other raw materials required for cement, such as clay, lime, and gypsum, are found locally. The clay in the borrow pit of this brick kiln itself contains less sand and is reddish in color - it contains high iron content and is very suitable for burning cement and lime.
In other words, although the calcium carbonate content of the lime burned in the shell oyster house at Bopu is relatively low, chalk mineral deposits can also be found near the borrow pit. Gypsum has not been found nearby yet, but it is not a big problem whether to add gypsum or not.
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After Wang Luobin thought about it again and again, he decided not to install a complete set of equipment that has certain requirements for temperature and raw materials, but to make a simple substitute cement to meet the current construction needs. This substitute cement is also called "artificial pozzolan cement"
, some places have also burned it in rural areas in the past. It does not require complicated equipment processes. Simply put, the fired bricks or pottery are broken and ground into fine pieces, or the lime and clay can be directly calcined in the kiln. This kind of
The process of replacing cement is very simple. The calcining temperature is 600-800 degrees Celsius, which is much lower than the 1450 degrees Celsius required for firing Portland cement. Its performance is roughly similar to the oldest "pozzolana cement". Yunnan's Yunnan-Vietnam Railway is
Built with this kind of cement, it was widely used in infrastructure construction in the southwest rear area during the Anti-Japanese War.
Wang Luobin only knew that this thing existed, but he didn't know whether it could be used. So he first asked someone to take a batch of red bricks fired from the brick yard for experiments. The workers used their hands to break the bricks one by one into small pieces.
The grinding work was originally planned to use manpower or horse power to pull stone mills - they found many large and small stone mills in the quarry of Bairentan - and after running for an hour, they found that the efficiency was really terrible:
10 kilograms were crushed.
After grinding and sifting, Wang Luobin mixed the powder with lime, then added water and mixed well. In full view of the construction team, the mixture was used to build a wall. Everyone was very excited and wanted to see this legendary wall with their own eyes.
Is replacing cement really effective?
After drying, it is proved that this substitute for cement of fired clay is completely usable. Of course, it cannot be compared with real Portland cement, but it can be used as a binder for building materials and can even make concrete with low strength requirements.
This discovery excited everyone. Even Zhao Wu, the bricklayer who smashed the bricks, looked excited - he had been a plasterer for more than ten years. When building walls and houses, he used loess, lime and water mixed evenly for bonding.
What was exquisite was just mortar with glutinous rice juice added. These people actually used bricks to grind powder to make mortar that can firmly bond the bricks together! This was beyond his imagination, they were really like a sea of people.
Are you a thief? You have to remember this trick. Because I learned this trick, I was even a little happy that I was captured.
Cement is the first modern industrial product in the real sense for time travellers. Although it is not very qualified yet, it is a crucial step in the construction of time travellers. Cement is the basic raw material of modern buildings.
However, the grinding efficiency is still too low. At this level, the output of continuous grinding for 24 hours is only 240 kilograms, which is too low to be mentioned.
After research, the people in the mechanical team created a simple automatic grinding machine. They used two stone grinders found from the Bairentan quarry to make an electric double grinder, connected by a mandrel.
On the vertical shaft, bearings are installed on the vertical shaft to reduce the resistance during rotation. A swinging frame equipped with a throwing wheel is used to drive the bevel gear through an iron chain to make the stone mill run.
However, feeding and screening materials are still done manually, which is not only inefficient, but also prone to pneumoconiosis - this is a very troublesome occupational disease that is almost impossible to save. Although the people who do these tasks are captive indigenous people, the labor force is very important to the travelers.
It is also a kind of wealth. Zhan Wuya took several mechanical team members to study it, added a wooden wheel to the bevel gear, and used a belt to drive a windmill for sifting grain. The material was added through the funnel at the top of the vertical shaft.
, the ground powder automatically flows down the ramp and falls into the windmill. The wind force is used to separate the coarse and fine particles. The coarse particles are sent back to the funnel above the stone mill from the conveyor hopper next to the ramp, and then enter the roller again to grind finely. This
The earth-moving equipment of Tiemushi Co., Ltd. can crush almost 1 ton of broken bricks every day.
With cement, refractory bricks are also needed to build the rotary kiln. Refractory bricks are one of the cornerstones of modern industry. Without this, there is no hope for rotary kilns, cement kilns, or even future blast furnaces. Fortunately, Lingao produces refractory bricks locally.
Materials. The travelers found the alumina and silicon oxide used to make refractory bricks from near the brick kiln, and easily made refractory bricks.
With refractory bricks and cement, it was easy for the construction team to build a wheel kiln. A few days later, the brick-red chimney of the wheel kiln spewed thick black smoke into the air for the first time.
"Damn, it's so beautiful." Someone was murmuring to himself. The eyes of the time travelers showed an intoxicated look. The scene that was disgusted by everyone in the past and symbolized backwardness and pollution is now regarded by the time travelers.
The most beautiful thing, Wang Luobin looked at the smoke, and somewhat understood why the great leader didn't value Beijing's ancient city walls at all and demolished them whenever he wanted. But he made the bold statement that "Beijing's chimneys should be as dense as the woods" -
The ancient city wall was an extremely familiar thing to the Chinese people at that time, and the scarce modern industry at that time was a symbol of a country's social progress.
At this time, the brick-red chimney of this wheel kiln stands proudly among the green mountains and green waters beside the Wenlan River. It does not seem to be out of place for the travelers, and it declares that the industrialization era of the travelers has officially begun.
The wheel kiln needs to be warmed before firing, and the construction team sets off to Bopu to build a wood drying kiln for the wood processing factory. With this standard drying kiln, the wood team can continuously provide energy.
Qualified wood products are given to the construction site in Bairencheng, instead of temporary substitute wood that is dried in earth kilns with varying humidity and may shrink and deform at any time. Wang Luobin will not participate in this matter. The dimensions and materials of the drying kiln, anyway, Luo Duo
He knows how to find books. He had never seen such a thing when he lived in Guangxi.
Watching the construction engineering team climb onto the agricultural vehicle and drive towards Bopu, he suddenly remembered something and immediately dialed a phone call to Mei Wan: "You and the people in the timber team will discuss building another wood retort kiln."
"Retorting kiln?" Mei Wan didn't know what it was.
"It's a kiln for burning charcoal. You can tell Luo Duo later that he knows about it. You should study it first and see when it can be put into production."
Since there is no coal, we can only use charcoal as a substitute. By carbonizing wood, you can not only obtain charcoal, but also wood tar, which is used as a chemical raw material. This is a complex compound that can extract many useful substances. The charcoal itself
The calorific value is not inferior to that of coal.
The catering office uses a cooking truck to deliver meals to the workers in the brick and tile factory. Now, Wu De has taught them to queue up with sticks. Queuing is a basic social order, and everyone can generally obtain resources fairly.
One manifestation is that the reason why Chinese people don’t like queuing seems to have nothing to do with personal quality. Perhaps it has a lot to do with the long-term lack of social resources. Whoever obeys the order will suffer. So over time, everyone doesn’t like queuing anymore. If there is a chance
He would rush forward and push others behind him. Wu De felt that this was somewhat true.
Just like the current meal sharing, although each team has a captain to maintain order, the whole team is still a bit messy, and everyone hopes to be in the front. However, due to the intimidation of the time traveler, the order of the team
Just barely saved it.
Wu De was satisfied with the work of his laborers. During the entire project, he seemed to just walk around and observe the team. Most of the people worked relatively hard, but of course it was not their consciousness.
High, but the sense of competition among the five captains. No one wants their team to perform too poorly in front of Wu De - for the common people, "traitors are worse than Japanese." These five captains,
They were indeed very hardworking in supervising and urging work, but this was not enough. Wu De knew that the prisoners worked hard only because of fear. To work hard voluntarily and voluntarily, stimulation from other aspects was needed.
Wu De decided to start with food. After each of the prisoners received a bowl of porridge, Wu De asked someone to bring a basket. This strange-shaped thing made by a mechanical assembly exuded a fishy smell of dried sea.
It’s a salted fish work that failed in catering...
"Wang Tian's team did the best and most work today," Wu De announced on the mound, "so each of their teams can eat one more salted fish."
This extra reward made many people's eyelids swell. From the time they were captured, they had to eat two meals of porridge a day - this is still enough for most people - and they have lived a half-starved and half-fed life since birth.
There were a lot of people there, but there wasn't even a salted radish or anything like that. I drank porridge and urinated a lot, couldn't eat salt, and my body became weak after two days.
"Wang Tian commanded well, two pieces were sent." This reward made Wang Tian's face light up with excitement, and the other four people all felt a little sour. Eating more salted fish is a small thing, but losing face is a big deal. They are all thinking about the evening.
We need to severely deal with these guys who are doing foreign work--killing the chicken to scare the monkeys.