Otaku Engineer in Great Tang Dynasty Chapter 450: Ancient cement~!

The Empress Longsun finally left, but with a smile of mystery. She left gently, but left Yan Shaoning with a bomb that could explode at any time.

"Father~, why did you agree~? My child is only eighteen years old this year, so what's the hurry?"

Seeing that the eldest grandson had gone far, Yan Shaoning had the courage to say, grievances.

"Asshole~! Empress Hong En, don't you want to refuse~? Besides, what the queen said is exactly what the old man thought! You think Xiaoxuan is three years younger than you, and is now married. Where's your kid~?"

Yan Lide stared angrily when he heard this.

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: Te Niang’s

Sometimes it is a kind of distress to have a friend who is too good~!

Li Zexuan rolled his eyes helplessly, which means: Brother, I am so good, there is no way!

Yan Shaoning almost vomited blood, if the occasion was not right, he really wanted to find Li Zexuan desperately at the moment.

"Ahem~! Uncle Yan, the building of Yanhuang Academy, I beg you!"

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

"Hmm~! No problem~! Your Majesty has personally explained that, 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 It should be possible to allocate 220 craftsmen skilled in garden construction for you.

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 raised his head and thought for a while, stroked his beard.

"Two hundred and twenty~? It should be enough~! As for the folks, the kid must be hired by his own money. This Uncle Yan does not have to worry. What the kid wants to ask is, this kind of high-rise building is built with the craftsman's construction technology , Can it be made~?"

Li Zexuan nodded and asked.

He understood 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. In this case, Yan Lideken has been very effective in assigning so many craftsmen to him. As for ordinary civilians, he never expected the court to use corvee to help him recruit for free. Since he had made up his mind to build Yanhuang Academy, he never thought To save money too.

The key to the current question is whether the 10-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 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. This building has only ten floors and the total height is estimated to be less than twelve meters. No problem at all.

Have you seen the Big Wild Goose Pagoda Xiaoxuan 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 at Jinchangfang in the south of Chang'an City, 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-story building. Thousands of years ago, the Tang Dynasty was really a "skyscraper".

But embarrassingly, 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.

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

Li Zexuan was slightly embarrassed, but at the same time he was 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 bricks and stones , The problem came. There was no cement in the Tang Dynasty, so how to build walls~?

"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 is masonry. For such a tall building, you can't just use wood~"

Being regarded as a stupid, Li Zexuan's old face is not very good, he directly asked the subject, and said: "Then what kind of thing should be used to stick the bricks~?"

Yan Lide's complexion suddenly became even more weird. He paused for a while before he said, "Of course I use glutinous rice mortar~! Xiaoxuan, you...you don't even know this~? Then why do you design this? 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 Huh~?"

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 is reliable~! The walls of Chang'an City are built with glutinous rice mortar. You said it is not reliable~?"

In fact, the ancient construction craftsmanship is far from as low as Li Zexuan imagined. Although there is no cement at this time, there are many alternatives.

In the West, clay was originally used as a cementing material. The ancient Egyptians used the 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 digest the lime water, mix it with sand to form mortar, and then use this mortar to build buildings. Ancient Roman buildings with lime mortar ~ IndoMTL.com ~ 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 finely ground volcanic ash. In areas where there is no volcanic ash, finely ground bricks that have the same effect as volcanic ash were added. 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 continued for a long time, and its performance has basically been close to that of 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 circulating product was glutinous rice mortar.

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

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

To this day, 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 wind and rain for hundreds of years.

Facts have proved that glutinous rice mortar is an outstanding building cementing material. The quality of ancient buildings built with glutinous rice mortar is not weaker than that of some modern reinforced concrete buildings.

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

.................................(Tianjin Novel Network https://)