Empress Eldest Sun finally left, but with a hint of a puzzled smile, she left gently, but left Yan Shaoning with a bomb that could explode at any time.

"Dad~, why did you agree~? The child is only eighteen years old this year, why is he in a hurry? ”

Seeing that the eldest grandson was far away, Yan Shaoning was bold and said aggrievedly.

"Bastard~! Queen Mother Hongen, do you still want to refuse~? Besides, what the queen said is exactly what the old man thinks! You see that Xiao Xuan is three years younger than you, and now he has a family, what about you kid~? ”

Yan Lide said in annoyance with wide eyes when he heard this.

Yan Shaoning shrunk his neck, wiped the foaming stars on his face, and glanced at Li Zexuan with a bitter expression, and his eyes clearly said: Special mother

Sometimes having a friend who is too good is also a kind of distress~!

Li Zexuan rolled his eyes helplessly, which meant to say: Brother, I'm just so good, there's no way!

Yan Shaoning almost vomited blood, if it weren't for the wrong occasion, he really wanted to find Li Zexuan desperately at the moment.

"Ahem~! Uncle Yan, the building of Yanhuang Academy, please leave it to you! ”

After making some eye contact with Yan Shaoning, Li Zexuan felt that the whole person was a little bad, because he felt that this kind of exchange was a bit gay gay, so he looked at Yan Lide and said with a straight face.

"Hmm~! No problem~! Your Majesty has personally explained just now, and the Ministry of Industry will fully cooperate with you~! Fortunately, the Ministry of Industry has not been assigned any emergency construction personnel recently, so according to the old man's rough estimate, the Ministry of Industry should be able to allocate 220 craftsmen who are skilled in garden construction to you.

Among them, several of them have participated in the construction of Cuiwei and Yuhua palaces with the old man, and they are very experienced in the construction of buildings. As for ordinary people, you must recruit them yourself, and it is impossible for the court to recruit you for free~! ”

Yan Lide raised his head and thought about it, and said with a beard.

"Two hundred and twenty~? It should be enough~! As for the people's husband, the kid must be hired at his own expense, this Uncle Yan doesn't have to worry too much, what the kid wants to ask is, can this kind of high-rise building be built with the construction technology of the craftsmen of the Ministry of Industry~? ”

Li Zexuan nodded and asked.

He knew in his heart that now the entire imperial court, except for Li Er and a few generals who were closer to him to support Yanhuang Academy, the rest of the ministers were either waiting and watching, or opposing in their hearts, after all, this involved the dispute between schools, in this case, Yan Lideken was already very powerful in allocating so many craftsmen to him, as for ordinary people, he had never expected the imperial court to use conscription to help him recruit for free, since he had made up his mind to build Yanhuang Academy, he never thought of saving money.

The crux of the matter now is whether the ten-storey building it designed can be built with Datang's current construction technology.

Yan Lide took a closer look at the sand table, then pointed to the future teaching building of Yanhuang Academy, Guanghua Building, and said with a confident smile:

"Xiao Xuan, are you worried that this building is too high, and you are afraid that the craftsmen will not be able to build it~? Hehe~! In fact, you don't have to worry at all, this building is only ten floors, and the total height is estimated to be only 12 zhang, so it is not a problem to build at all.

Have you seen the Big Wild Goose Pagoda Xiaoxuan in Jinchangfang? The tower has 20 floors, compared to the Big Wild Goose Pagoda, although your high-rise building covers a wider area, as long as you put a lot of effort on the pillars between the floors, there is no problem at all to build to 10 floors~! ”

The Big Wild Goose Pagoda is located in Chang'an City South Jinchangfang, also known as "Ci'en Temple Floating Slaughter", after several repairs, up to 64.7 meters (about 19 zhang), equivalent to the current 20-storey high, in the Tang Dynasty thousands of years ago can really be described as "skyscraper".

However, the embarrassing thing is that Li Zexuan rarely goes to the south of the city, let alone the Big Wild Goose Pagoda, which is worthy of his reputation as a dead house.

"Eh, ahem, that's good, that's good~!"

Li Zexuan was slightly embarrassed at the same time, but he was also relieved, but he was still a little curious, such a high floor would definitely not be built just with wood, because wood could not bear such a large weight, but if it was made of masonry, the problem would come, there was no cement in the Tang Dynasty, so how to build a wall~?

"What kind of materials does Uncle Yan plan to use to build these buildings~?"

Such a "two" question made Yan Lide speechless, he said: "Of course it's bricks and stones, such a tall building, you can't just use wood~!" ”

Being regarded as a fool, Li Zexuan's old face was not very good-looking, he asked the subject directly, and said: "Then what kind of thing should be used to stick between this masonry and stone~?" ”

Yan Lide's face suddenly became even more strange, and he paused for a while before saying, "Of course it's glutinous rice mortar~!" Xiao Xuan, you... You don't even know this, do you~? Then why did you design such a tall building~? ”

"Well, I really don't know~! The kid thought about designing it first to see if he could build it, if he couldn't build it, the kid would think of another way, cough cough, Uncle Yan, is this glutinous rice mortar wall unreliable~? ”

Yan Lide was speechless, he was still admiring Li Zexuan's proficiency in architectural design, but now it seems that this product is completely novice in some aspects, he shook his head and said:

"Of course it's reliable~! The city wall of Chang'an City is built with glutinous rice mortar, do you say it is reliable~? ”

In fact, the ancient construction process was far less than Li Zexuan imagined, although there was no cement at this time, there were many alternatives.

The West originally used clay as a cementitious material, and the ancient Egyptians used mud from the Nile River to build uncalcined adobe bricks. Around 3000 BC and 2000 BC, the ancient Egyptians began to use calcined gypsum as a building cementitious material.

In 146 BC, the Roman Empire annexed Greece while continuing the tradition of the Greeks in the production and use of lime. The Romans used lime by first dissolving it and mixing it with sand to form a mortar, which was then used to build buildings. Ancient Roman buildings with lime mortar, some of which were so strong that they have even survived to the present day.

Later, the ancient Romans improved the use of lime, mixing not only sand but also finely ground volcanic ash with lime, and in areas where there was no volcanic ash, mixed with finely ground bricks with the same effect as volcanic ash. Some people call the three-component mortar of "lime-volcano-sand" "Roman mortar".

In the history of European architecture, the application of "Roman mortar" has continued for a long time, and its performance has basically approached that of modern cement. However, in the ninth, 10th and 11th centuries AD, the mortar technique was almost lost.

In ancient China, although there was no Roman mortar, no cement, but the industrious and intelligent ancient working people still invented other alternatives, the most widely used, the longest spread, is glutinous rice mortar.

According to records, at least no later than the Northern and Southern Dynasties period (386~589 AD), glutinous rice mortar has become a relatively mature technology.

Mixing glutinous rice slurry into aged lime paste can increase the bonding strength, surface hardness, toughness and impermeability of mortar, and significantly improve the firmness and durability of masonry.

To this day, many ancient buildings that use glutinous rice mortar, such as the ancient city walls of Nanjing, Xi'an, Jingzhou, Kaifeng and other places, as well as the fish scale stone pond of the Ming and Qing dynasties in the Qiantang River, are still very strong despite being washed by wind and rain for 100 years.

Facts have proved that glutinous rice mortar is a building cementitious material with outstanding performance, and the engineering quality of ancient buildings built with glutinous rice mortar is not weaker than that of some modern reinforced concrete buildings.

Therefore, the wisdom of the ancients should not be underestimated, and the craftsmanship of the ancients is not useless, and there are still many shining points.

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(End of chapter)