Chapter 450: Ancient cement~!

Empress Changsun finally left, but with a fascinating smile, she left gently, but left Yan Shaoning with a bomb that could explode at any time.
"Father~, why did you agree~? The child is only 18 years old this year, so what's the hurry?"
Seeing the eldest grandson had gone far away, Yan Shaoning was bold enough and said grievances.
"Bastard~! Empress Empress Hong En, don't you want to refuse~? Besides, what the queen said is exactly what the old man thought! You see Xiaoxuan is three years younger than you, and now you have a family and a business. What about your kid? ~?"
Yan Lide stared wide-eyed and exasperated.
Yan Shaoning shrank her neck, wiped the spitting stars on her face, and glanced at Li Zexuan with a bitter expression, the expression in her eyes clearly said: It’s a 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 am so good, there is no way!
Yan Shaoning almost vomited blood, if it wasn't for the wrong occasion, he really wanted to find Li Zexuan desperately at the moment.
"Ahem~! Uncle Yan, the building of Yanhuang Academy, I beg you!"
After making eye contact with Yan Shaoning, Li Zexuan felt that the whole person was a little bit bad, because he felt that such an exchange was a bit gay, so he looked at Yan Lide and said sternly.
"Yeah~! No problem~! Your Majesty has personally explained it just now, and the Ministry of Engineering will fully cooperate with you~! Fortunately, no emergency construction figures have been sent to the Ministry of Engineering recently, so according to my rough estimation, the Ministry of Engineering should be able to give You mobilize two hundred and twenty artisans who are skilled in garden construction.
Several of them have participated in the construction of Cuiwei and Yuhua Palace with the old man, and they are very experienced in the construction of buildings. As for ordinary civil servants, you must recruit them yourself. It is impossible for the court to recruit you for free~! "
Yan Lide looked up and thought for a while, stroked his beard.
"Two hundred and twenty~? That should be enough~! As for the folks, the kid must be hired by his own money. This Uncle Yan does not have to worry about it. What the kid wants to ask is whether this kind of high-rise building can be constructed with the craftsman’s construction technology. Made it~?"
Li Zexuan nodded and asked.
He knew in his heart that, in the entire court, except for Li Er and a few generals close to him who supported Yanhuang Academy, the other ministers were either watching or opposing in their hearts. After all, this involved a dispute between schools. Under the circumstances, Yan Lideken was already very effective in arranging so many craftsmen for him. As for ordinary civilians, he never expected the court to use corvee to help him recruit for free. Since he made up his mind to build Yanhuang Academy, he never thought about saving. money.
The crux of the problem now is whether Datang’s current construction technology can be used to construct the ten-story building it designed.
Yan Lide took a closer look at the sand table, then pointed to the future teaching building of Yanhuang Academy-Guanghua Building, and smiled confidently:
"Xiaoxuan, you are worried that this building is too high, and you are afraid that the craftsmen will not be able to build it~? Haha~! In fact, you don't have to worry at all. The building is only ten stories high, and the total height is estimated to be no more than twelve meters. .
Have you seen the Xiaoxuan of the Big Wild Goose Pagoda in Jinchangfang? The tower has 20 floors. Compared with the Big Wild Goose Pagoda, your tall building occupies a wider area, but as long as you put more effort on the pillars between the floors, it will be no problem to build up to ten floors~ ! "
The Big Wild Goose Pagoda is located in Chang'an City, South Jinchangfang, also known as the "Futu of Ci'en Temple". After several repairs, it is 64.7 meters high (about 19 feet), which is equivalent to the current 20-storey building. The Tang Dynasty can really be described as "Skyscrapers".
But embarrassingly, Li Zexuan rarely went to the south of the city, let alone the Big Wild Goose Pagoda, which was worthy of his reputation as a dead house.
"Uh, cough cough, that's good, that's good~!"
While Li Zexuan was slightly embarrassed, he was also relieved, but he was still a little curious. Such a high floor would certainly not be built only with wood, because wood cannot bear such a heavy weight, but if it is made of masonry, the problem is Here comes, there is no cement in the Tang Dynasty, so how to build the wall~?
"Uncle Yan intends to use what materials to build these buildings~?"
Such a "two" question made Yan Lide very speechless. He said, "Of course it's masonry. For such a tall building, you can't just use wood~!"
Being regarded as a stupid, Li Zexuan's old face didn't look good either, he asked the subject directly, and said: "Then, what kind of thing should be used to stick these bricks and stones~?"
Yan Lide's complexion suddenly became even more weird. He paused for a while before he said, "Of course it is using glutinous rice mortar~! Xiaoxuan, you...you don't even know this~? Then why did you design such a tall building? ~?"
"Uh, I really don't know~! The kid is thinking about designing it first to see if it can be built. If it can't be built, the kid will think of another way. Cough cough, Uncle Yan, this glutinous rice mortar wall is not strong~? "
Yan Lide was speechless. Fortunately, he was still admiring Li Zexuan for his proficiency in architectural design. Now it seems that this product is a complete novice in some aspects. He shook his head and said:
"Of course it's reliable~! The walls of Chang'an City are built with glutinous rice mortar, you say it's not reliable~?"
In fact, the ancient construction technology is far less low than Li Zexuan imagined. Although there is no cement at this time, there are many alternatives.
In the West, clay was first used as a cementing material, and the ancient Egyptians used Nile mud to build uncalcined adobe bricks. Around 3000 BC to 2000, the ancient Egyptians began to use calcined gypsum as a building cementing material.
In 146 BC, the Roman Empire annexed Greece and inherited the Greek tradition of producing and using lime. The Romans used lime to dissolve the lime water, mix it with sand to form a mortar, and then use this mortar to build buildings. Ancient Roman buildings with lime mortar ~ EbookFREE.me~ Some of them are very strong, and they are even kept today.
Later, the ancient Romans improved the use of lime, adding not only sand but also ground pozzolan to lime. In areas where there is no volcanic ash, it is mixed with ground bricks that have the same effect as pozzolan. Some people call the "lime-volcanic ash-sand" three-component mortar as "Roman mortar".
In the history of European architecture, the application of "Roman mortar" has lasted for a long time, and its performance is basically close to modern cement. However, in the ninth, tenth and eleventh centuries AD, the mortar technology was almost lost.
In ancient China, although there was no Roman mortar and no cement, the industrious and intelligent ancient working people still invented other alternatives. The most widely used and the longest spread is glutinous rice mortar.
According to records, at least no later than the Northern and Southern Dynasties (386-589 AD), glutinous rice mortar has become a relatively mature technology.
Mixing the glutinous rice slurry into the aged lime paste can increase the bonding strength, surface hardness, toughness and impermeability of the mortar, and obviously improve the firmness and durability of the masonry.
Today, many ancient buildings using glutinous rice mortar, such as the ancient city walls in Nanjing, Xi'an, Jingzhou, Kaifeng and other places, as well as the fish scale stone ponds of the Qiantang River in Ming and Qing Dynasties, are still very strong despite being washed by thousands of years of wind and rain.
Facts have proved that glutinous rice mortar is an excellent building cementing material. The 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 cannot be underestimated. The craftsmanship of the ancients is not useless, and there are still many shining points.
.................................(Tianjin Novel Network https://)