"Your Majesty the Emperor of the Great Sui, I don't know what a cement slab is, but these boxes seem to be made of volcanic ash......" Ji Shi Changdan saw that Yang Tong cared about this box, and hurriedly said.

"Volcanic ash?" Yang Tong now understands the origin of this box, the material melted by the heat of the active volcano is the natural cementitious material, the volcanic ash and volcanic stone formed by them are ground into fine powder and mixed with lime and water, which can not only harden in the air, but also harden in water, which is natural cement. The Uno Islands are volcanic and earthquake-prone areas, and it is not uncommon for the Ezo people to occasionally find volcanic ash.

The Central Plains is a country with many volcanoes, although in later generations it has become extinct volcanoes and dormant volcanoes, but in the Great Sui period, there are many active volcanoes in the territory, even if you can't get artificial cement now, you can also replace it with volcanic stone.

"Exactly." Ji Shi Changdan nodded.

"Holy!" Jiang Xingben bowed his hand and said disdainfully, "This volcanic ash box looks magical, but it's actually insignificant. ”

"How so?" Yang Tong was taken aback again, listening to the meaning of Jiang Xingben's words, it seemed that he also knew the characteristics of volcanic ash.

"This volcanic mud box, made thin, without falling, if it is thick, very heavy, one person can not carry it, how can there be a wooden box light?" Jiang Xingben said: "The key is that this thing is easy to resurge, put the clothes wet, put the paper rotten, and it is not worth mentioning." ”

"So, you've done it?" Yang Tong asked with a dark face.

"Exactly." Jiang Xingben said proudly.

"......" Yang Tong gritted his teeth in anger, and suddenly felt that he was so angry,

NN bears.

How much technology have these bastards in the Ministry of Industry neglected to ignore in addition to cement??

"Your Majesty the Son of Heaven of the Great Sui!" The neglected Ji Shi Changdan sobbed and said: "In the first year of Shengwu, we Ezo people fought fiercely against the tyranny of the Japanese slaves, but we were too weak and brutally suppressed by Su Ma Zi, and we were punished by the old ladies of Emperor Tuigu, and we could only get one-third of the previous price for animal skins, grain, iron ore and other things. My people freeze to death and starve to death every day, but fortunately, the Celestial Empire Navy has cut off the waterway for the Japanese slaves to go north to Ezo Island for more than a year, so that my Ezo people have a chance to breathe, so we come to ask you, I hope you can help us! ”

In the end, Ji Shi Changdan almost burst into tears.

"I estimate and believe that you have something to do with Xu Fu."

It is normal for Xu Fu's gang and their descendants to engage in male-female relations with the aborigines. But that's not the point, the point is that they can be cannon fodder.

"Thank you for the recognition of the Great Sui Emperor." Ji Shi Changdan felt close.

Yang Tong asked, "How many of you are there?" ”

Ji Shi Changdan looked at Yang Tong expectantly: "About 200,000." ”

Yang Tong was a little surprised by this amount, and when the Great Sui cannon fodder was enough, he said with a smile: "I helped you." ”

With a "poof", Ji Shi Changdan was so excited that he knelt on the ground again, and said with tears in his eyes: "You are really the most merciful saint in the world!" ”

"Hehe......" Hearing this, Yang Tong smiled.

You shrimp and crabs are also worthy of talking about kindness? It's just an insult to the word ...

Yang Tong did not have the slightest affection for the inferior people living on the four islands of the Japanese slaves. When the Central Plains was strong, they were as well-behaved as rabbits, with a harmless face to humans and animals; Once the Central Plains is weakened, he will show his fangs, pounce on him and bite hard, and be insatiable!

"In this case, I will fund you with 30,000 weapons and equipment, and let the navy send your soldiers south to Honshu Island."

"This... Seriously? Ji Shi Changdan Huo Ran raised his head, his eyes wide, and he really couldn't believe his ears.

Yang Tong said gently: "Da Sui is benevolent and loves people, not only patriotic people, but also all peace-loving people!" Helping the weak live a better life has always been the unswerving national policy of the Great Sui! ”

Ji Shi Changdan was so moved that he kowtowed: "Ezo people will always remember your deep friendship!" Ji Shi Changdan hereby promises that as long as there is an Ezo person alive, it will be dominated by the Great Sui, as long as the Great Sui Emperor gives an order, the Ezo people will go to the soup and die forever! ”

"I have three conditions."

"Speak, please." Ji Shi Changdan was very excited, thinking that Yang Tong would recognize them at most Ezo people, so that they could fake the tiger, but he didn't expect to get so many good things! However, although he doesn't know the phrase 'nothing to do is not a thief', it doesn't mean that he doesn't understand this truth. So when Yang Tong said that there were conditions, he believed it even more.

"First, the Great Sui Navy will choose a place on your land in the future to build a military port, and a radius of thirty miles will be under the control of my Great Sui, which is the territory of my Great Sui; Second, in this field, everything is up to me, the Great Sui; Third, if there are mines or something in these places in the future, they will all belong to my Great Sui; Fourth, if I, the Great Sui people, walk in other places and have conflicts with your people, we can only be judged by our Great Sui, and you must not interfere. ”

Give the Ezo people 30,000 sets of obsolete weapons and equipment, so that they have the courage to fight with the Japanese slaves, and when they are dying, the Great Sui Xiongshi will be like a heavenly soldier descending to the earth, saving the Ezo people from fire and water, and avoiding the misfortune of extermination, at that point, the Ezo people will only cry and kneel and beg the Great Sui to act as a protective god! It's just that it's easy to ask the gods and it's hard to send the gods, once the Great Sui Xiongshi sets foot on that land, it's not the Ezo people who have the final say.

Yang Tong's opening of these three conditions is nothing more than to remove the other party's guard.

"That's totally fine." Ji Shi Changdan slapped his chest loudly, if it weren't for the Great Sui Navy to isolate them from the Japanese slaves, the Ezo people are estimated to still be bullied by the Japanese slaves, how can they be qualified to fight with the Japanese slaves? And with their population, even if they get 30,000 sets of weapons and equipment, it is obviously difficult to fight against the Japanese slaves for a long time, even if Yang Tong does not have the conditions of garrison, he has to plead.

Mines or something, that's also after the Ezo people founded the country and occupied Honshu Island, and it has nothing to do with it now.

Ji Shi Changdan's purpose was compensated, and seeing that Yang Tong had nothing to explain, he thanked him and resigned.

He felt that this mission was too smooth, not only won the friendship of the Great Sui, but also gave the clansmen the strength to fight against the demons, so that the clansmen could hope to recapture the legendary beautiful, rich, warm and warm Kanto Plain. He didn't know that at the same time, he had also brought another demon to his nation, but this demon looked very kind and benevolent.

"Does the Holy Lord really want to support the Ezo people?" After Ji Shi Changdan left, Yang Gongren asked, 'leaving the strong and helping the weak' was the national policy of the Great Sui to the outside world, and it was in the interests of the Great Sui to use 30,000 sets of obsolete equipment to trick the Ezo people into fighting against the Japanese slaves; he was afraid that Yang Tong would be stimulated by the descendants of Xu Fu and go to the boundless and risky sea to find the immortals that did not exist.

"I just support the Ezo and the Japanese slaves in the war, wait for them to lose both, and then destroy the four islands in the sea."

"Is the island really that good?"

"Xu Jingzong's last time in the gold and silver tower of Ziwei City, have you forgotten? I tell you, that's only one in 10,000. Once the islands of the Wa Kingdom are included in the hands of the Great Sui, then our Great Sui will definitely have a rich treasury. ”

As soon as they heard the gold and silver tower, everyone stopped talking. Even now, the shock in everyone's hearts has not disappeared.

Yang Tong said again: "I don't have a good impression of the Ezo people and the Japanese slaves, and it doesn't matter if they die or die. I'm not interested in those islands, as long as the islands are gold, silver and bronze..."

"......" everyone said: Are you still interested in thinking about other people's gold, silver and copper?

"Don't talk about that." Yang Tong waved his hand and said to Jiang Xingben: "You know the role of volcanic ash, why didn't you say it earlier?" ”

"Holy Lord, Wei Chen just said, this thing is useless?" Jiang Xingben said blankly.

"It's useless for you." Yang Tong scolded with a smile and said, "Since you know the characteristics of volcanic ash, do you know that the mud of volcanic ash can also be solidified into a board by mixing it with clean gravel, sand, and lime powder?" ”

Jiang Xingben nodded: "I know!" ”

Yang Tong was even more speechless, and could only prompt little by little: "It has not been easy to build bridges since ancient times, why?" It is because the river is too wide, and there is not so long timber flying on both sides of the river; Of course, it is also possible to build a few more wooden piers in the river, but if you lay wooden planks on them, the wooden piers are not only perishable, but also easy to be knocked down by the wood flowing upstream; In the event of a flood, the entire bridge will be washed away when debris such as tree trunks and other debris from the upstream get stuck on the piers. Isn't that so? ”

"Yes." Jiang Xingben nodded again

"It's good to understand." Yang Tong changed the topic: "If you set up a dam on the river surface in the dry season and divert the river water to other places, you can clear the waterless area out of the stone bottom, if you dig holes in the bottom of the stone, drive iron piles, and then pour volcanic mud layer by layer like building a city wall, after solidifying, this is not the same as the bridge pier at the bottom of the stone and the mainstay?" If a few more piers of the Yellow River were to be built with iron as reinforcement and volcanic mud as the bone, then a wide bridge deck could be erected on it. At that time, the moat will become a thoroughfare, and pedestrians and carriages can cross the Yangtze River and the Yellow River as if they were walking on the ground. ”

Yang Tong's words seemed to be full of magic, which made the blood of the ministers of civil and military affairs present boil.

Dynasties have conquered almost all rivers, but the Yangtze River and the Yellow River are helpless, these two big rivers are like an insurmountable moat, hindering the communication between the north and the south, bothering generation after generation, and if the volcanic mud can be solidified with the bottom of the riverbed, then the Great Sui really has the possibility of conquering the Yangtze River and the Yellow River.

"In addition to this volcanic ash can be used as a bridge over the water, it can also be used when the track passes through the valley, and the track bridge can be erected in this way, which will definitely achieve twice the result with half the effort, and in addition, it can also repair the city, build houses, build embankments, and ......" Speaking of this, Yang Tong hated that iron could not become steel and said to Jiang Xingben: "You obviously discovered the magic of this thing, but you said that it was useless, and you didn't study it carefully." If I hadn't seen this box, such a divine object would have passed by the Great Sui like this. I said you're useless, are you convinced? ”

"Surrender your heart and ask God to give you sin." Jiang Xingben was surprised and delighted, but more ashamed.

Jiang Xing, who is deeply aware of the characteristics of volcanic ash, has come to his senses.

Under Yang Tong's suggestion, everything suddenly became clear.

He even came up with the idea of pointing the piers upstream, so that not only would the force of the torrent be greatly reduced, but also that the objects floating upstream would slide through, and at the same time, a dam should be placed above the piers to prevent the ships from being breached......

"That's it." Yang Tong shook his head, Da Sui does not lack skilled craftsmen, but lacks flexible minds and changing consciousness, which is a common social behavior, Jiang Xingben, Li Chun, He Chou, Yuwen Rutong, Yuwen Wen and other masters are good characters.

"There is no shortage of sacred objects in daily life, but there is a lack of a pair of eyes to discover them, so we should pay more attention to everything, discover more, study more, and ask why?"

"Whoa."

"By the way, is there any volcanic ash or volcanic stone in Daxing City?" Yang Tong asked.

"It's in the Imperial City!" Jiang Xingben explained: "The track uses the technology of whisking soil from craftsmen in the Western Regions, which includes volcanic ash, and in order to further improve the Qihe soil, a lot of volcanic ash from the Ministry of Engineering was taken to the official residence for testing. ”

Romans are also ancient countries with a long history, and they are different from the wood-based Central Plains in terms of architecture, and they are accustomed to using stone to repair the walls of houses, so their use and understanding of soil is far above that of the Central Plains.

The highest grade of concrete in Rome is the heptagram clay made from a mixture of seven types of soil, which is very strong. It is several grades stronger than the rammed earth and triple soil used in the Central Plains. The recipe for the ratio of Qihe soil also spread to the Great Sui with the arrival of craftsmen from the Western Regions.

"Let's try the volcanic mud effect." Yang Tong was the first to walk out of the main hall.

Everyone heard Yang Tong say that the volcanic ash was so magical, they were all curious, and when they saw Yang Tong move, they followed him mightily and slaughtered towards the official residence of the Ministry of Industry.

In the official residence, Li Chun, the squire of the Ministry of Works, was in a daze with a model of a cable bridge with three crossed semicircles on each side, this model was Yang Tong's idea of building a bridge across the Yellow River, he felt that the feasibility was extremely high, but how to stabilize the three cross arch bridges really stumped him, when he heard about the effect of volcanic ash, he excitedly went to the backyard with him.

There are many craftsmen here, and under the command of Yang Tong, we first made a rectangular mold, like pouring it on the spot, and laid a layer of thumb-sized iron bar net in the middle of the mold.

After the mold is made, the mixture, hydrated lime, sand, and volcanic ash are stirred.

For such a simple thing as mixing mortar, craftsmen have long been familiar with it to the bones.

Of course, it is the first time that volcanic ash has been used as the main ingredient, and it has been stirred with slaked lime, glutinous rice milk, clay and other sundries before.

This glutinous rice slurry is one of the oldest crafts, and it is this process that the Great Wall of Qin has been able to survive for thousands of years.

The stirring of volcanic mud is no different from glutinous rice mud.

After mixing well, the craftsman poured it into the mold and bulldozed it with smooth wooden planks. Then, according to Yang Tong's instructions, the remaining volcanic mud was smeared on a flat bluestone slab, like a brick wall, and a small wall was built from the ground.

When they completed both jobs, they found that the volcanic ash was mixed with lime and water, and soon began to harden.

This hardening speed has never been seen by anyone.

One by one, they were dumbfounded.

Jiang Xingben was shocked: "It's only been about a moment, and the mud has dried up a lot, which is unbelievably fast." As he spoke, he pushed the stone wall hard, and the countless bluestone walls mixed with mud did not move at all.

"It's just that the surface is dry, and the mud mixed with the bluestone will take a few hours to harden. When it is completely hardened, it becomes one with the bluestone, and the clay slab with iron as the bone and mud as the muscle is even more powerful, as solid as a rock, the sword is difficult to hurt, and it is harder than a hard boulder. ”

Jiang Xing had already seen the power of this thing, and now it can't be pushed before it is completely hardened, and the solidity after complete hardening is self-evident, he said excitedly: "This thing is indeed amazing, but even if the river is cleaned up and dry, there will be water seeping in, if it is used to repair bridge piers, wouldn't it be washed away by the water that seeped in?" ”

"You still haven't found the right way to use it." Yang Tong shook his head: "Because it needs a lot of water to mix, so when you build the pier, you just need to pour in the dry slurry, the water that seeps into it will not only not wash it away, but will become its tonic, when the water exceeds its absorption capacity, it has hardened, and at that time, the weak seepage water can no longer wash it away." ”

"yes!" Jiang Xingben's eyes lit up, and he said excitedly: "As the saint said before, as long as we isolate the water of the Yellow River, clear the stone bottom in this waterless area, drill holes, nail iron bars, and then pour in the mortar that has not yet been mixed with water, the iron bars will be fixed at the bottom of the river, and then on this base, use wooden planks to form the shape of a bridge pier, pour dry slurry, and pour wet slurry beyond the horizontal plane." ”

"Not bad." Yang Tong pointed to the cement slab that was drying and said: "The bridge pier is completed, and this cement slab is paved, and it will be a smooth bridge deck." ”

"With this artifact in hand, the Yellow River Bridge can be expected." Li Chun next to him said happily.

"Although there is cement that can be hardened in water, we can't just take advantage of the convenience of the water and lay the bridge piers all over the river, otherwise, there will be countless 'mainstays' of the Yellow River, so that the Yellow River will lose its ability to transport water, and the loss will be countless times greater than that of no bridge across the river, so before building the bridge, we should consider the distance of the bridge piers, the height of the bridge deck, and the size and height of the boats, and I think that a cable bridge may be more suitable than a flat bridge."

Yang Tong pondered for a while and said to Li Chun: "In order to verify the feasibility of the cable bridge, Li Shilang, you take a group of bridge craftsmen to Luoshui to build a bridge, accumulate experience for the Yellow River Bridge in the future, and also cultivate bridge talents for my Great Sui." ”

Li Chun took a deep breath and suppressed the excitement in his heart, "Weichen will never live up to the trust of the saint, and he will definitely build a rope bridge." ”

"You just have to do it according to your own design plan, don't be afraid of failure, if you fail once, you will build it ten times, and if you don't work ten times, you will do it a hundred times." Yang Tong encouraged.

"Thank you for your trust."

Li Chun was surprised, delighted and moved!

The opportunity and credit given to him by Yang Tong is too great, once he succeeds, then he Li Chun will be famous for all eternity.

What he didn't know was that the complete Anji stone arch bridge was enough to make him famous in history. However, if the Yellow River Bridge is completed in his hands, then the merits of the Anji Bridge are almost negligible.

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Ask for more tickets in the morning!