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. [No pop-up novel website].
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. As for lime, although the calcium carbonate content of the lime burned in the shell oyster house at Bopu is relatively low, chalky soil deposits can also be found near the borrow pit. Gypsum has not been found nearby yet, but the question of whether to add gypsum or not is not big.
After careful consideration, Wang Luobin decided not to install a complete set of equipment that had certain requirements for temperature and raw materials for the time being. Instead, he simply fired a substitute cement to meet the current construction needs. This substitute cement is also called "artificial pozzolanic cement", and some places have burned it in rural areas in the past. It does not require complicated equipment processes. To put it simply, the fired bricks or pottery are broken and ground into fine pieces, or the lime and clay can be directly calcined in the kiln. The process of this cement substitute is extremely simple, and the calcination temperature is only 6oo-8oo degrees Celsius, which is much lower than the 145o degrees Celsius required for firing Portland cement. The performance is roughly similar to the oldest "pozzolana cement". The Yunnan-Vietnam Railway was built with this kind of cement, and it was widely used in the infrastructure construction of 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 first I asked someone to bring a batch of red bricks that had been burned in the brickyard for experiments. The workers smashed the bricks into small pieces one by one by hand. The grinding work was originally planned to use manpower or horse power to pull the stone mills - they found many large and small stone mills in the quarry of Bairentan. ——After running for an hour, I felt that the efficiency was really terrible: only 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 with their own eyes whether this legendary cement substitute was really effective.
After drying, it was proved that this fired clay substitute for cement is fully 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 excites everyone. Even Zhao Wu, the bricklayer who smashed the bricks, had an excited look on his face - he had been a plasterer for more than ten years. When building walls and building houses, he mixed loess, lime and water for bonding. The most exquisite thing is just plaster with glutinous rice juice added. These people actually used bricks to grind powder to make plaster that can firmly bond the bricks together! This was beyond his imagination. Are they really pirates? You have to remember this trick. Because I learned this skill, I was even a little happy that I was captured.
Cement is the first modern industrial product in the true sense of the time travellers, although it is not quite qualified yet. But this is a crucial step in the construction of the time traveler. Cement is the basic raw material of modern construction.
However, the grinding efficiency is still too low. At this level, the output of continuous grinding for 24 hours is only 24o kilograms, which is too low to be mentioned.
After research, the people from the mechanical team built a simple automatic grinding machine. They used two stone mills found from the Bairentan quarry to make an electric double mill, which was connected to the vertical shaft with a through-mandrel. The vertical shaft was equipped with bearings to reduce the resistance during rotation. The swinging frame with the throwing wheel drives the bevel gear through the 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 - a very troublesome occupational disease that is almost impossible to save. Although the people doing these jobs are captive indigenous people, the labor force is also a kind of wealth for the travelers. Zhan Wuya took several mechanical team members to do some research, added a wooden wheel to the bevel gear, and used a belt to drive a windmill for sifting grain. The material was added from the funnel at the top of the vertical shaft, and the powder was ground out. The material 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 hopper above the stone mill from the conveyor hopper next to the ramp, and then enter the roller again to grind finely. This set of earthen equipment produced by Tiemushi can crush almost 1 ton of broken bricks every day.
With cement, refractory bricks are also needed to build the wheel kiln. Refractory bricks are one of the cornerstones of modern industry. Without this thing, not to mention wheel kilns and cement kilns, there is no hope of even the blast furnaces of the future. Fortunately, Lingao produces refractory materials locally. 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 rotary kiln. A few days later, the brick-red chimney of the rotary kiln spewed thick black smoke into the air for the first time.
"Damn, it's so beautiful." Someone was murmuring. There was an intoxicated look in the eyes of the travelers. The scene that was hated by everyone in the past and symbolized backwardness and pollution is now regarded as the most beautiful thing by the travelers. Wang Luobin looked at the smoke and somewhat understood why. The great leader didn't value Beijing's ancient city wall at all and demolished it whenever he wanted. But there was a bold statement that "the chimneys in Beijing will 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 travelers, and it announces the official beginning of the industrialization era for travelers.
The wheel kiln needs to be warmed before firing, and the construction team went 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 provided to Bairencheng's construction site, instead of temporary substitute wood that is dried in earthen kilns with varying humidity and may shrink and deform at any time. Wang Luobin will not participate in this matter. Luo Duo will look for the dimensions and materials of the drying kiln anyway. He has 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 can discuss with the people in the timber team to build 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 instead. By dry distillation of 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. Charcoal itself is not inferior to coal in terms of heat.
The catering office used a cooking truck to deliver meals to the workers at the brick and tile factory. Now Hude has taught them to line up with sticks. Queuing is a basic social order and a manifestation that everyone can generally obtain resources fairly. The reason why Chinese people don't like queuing seems to have nothing to do with personal quality. Perhaps it is largely related to the long-term lack of social resources. Anyone who obeys the order will suffer. Therefore, over time, everyone does not like to queue up. If there is an opportunity, they will rush forward and push others to the back. Wu De felt that there was some truth to this.
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. Only due to the coercion of the time travellers, the order of the team was barely preserved.
Wu De was satisfied with the work of his workers. During the entire project, he seemed to just walk around and observe the team. Most people work relatively hard, not because of their high self-consciousness, but because of the sense of competition among the five captains. No one wants their team to perform too poorly in front of Wu De - for ordinary people It is always said that "traitors are worse than Japanese." These five captains did work very hard in supervising the work, but this was not enough. Wu De knew that the prisoners worked hard only because of fear. To work hard voluntarily, other stimulation 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 exudes 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 added bonus made many eyelids swell. From the time they were captured, they had to eat two meals of porridge every day - this is enough for most people - there are many people who have lived half-starved and half-fed since they were born, but they don't even have a salty radish or something like that. I had nothing to eat, I drank porridge and urinated a lot, I couldn't eat salt, and my body became weak after two days.
"Wang Tian commanded well, Nijo." This reward made Wang Tian's face light up with excitement, and the other four people felt a little sour. Eating an extra piece of salted fish is a small matter, but losing face is a big deal. They all planned to deal with a few hardworking guys that night - to scare the monkeys.
