The restoration of cultural relics starts from the live broadcast

Chapter 77 I'm really ashamed!

"Tell me what you think." He Dan, the deputy director of the Bureau of Cultural Relics, was obviously very surprised by the wheatgrass mud that Chuhe mentioned.

Chuhe then expressed his opinion: "Actually, this kind of lesion mural that looks hollow, in fact, its bulge is completely due to the structural change caused by the destruction of the internal combination of the grotto cliff, which in turn led to the introversion of the wall. The generation of external pressure."

"The mural layer cannot withstand this pressure, so it is forced to bulge outward, which is a lesion caused by 'internal force'."

When Chuhe finished speaking, Yang Shuo and others looked at him with their mouths wide open.

"Are you a devil? I can't understand what you're saying." Yang Shuo complained helplessly.

Shan Lao, the curator of the Forbidden City, asked a question: "Have you been to Dunhuang? Have you seen Cave 135?"

"No." Chuhe shook his head.

"Then how do you know this?" Zhang Yongjin was also curious.

Chuhe explained with some embarrassment: "I combined the force of physics and then guessed."

"Guess? Then what's the matter with the wheat straw mud you just mentioned." Zhang Yongjin asked him again.

Chuhe picked up a piece of information from the table, "I also checked the relevant information before, and the structure of the cliff body is a semi-cemented Quaternary sandy conglomerate layer. The front rock mass of this cave has a new reinforcement protection Wall, I just saw in the video that aluminum alloy doors and windows were installed in the cave.”

"This forms a barrier to protect the cliff and cave from wind erosion, but the exposed sandy rock layer inside the cave is covered with a thick layer of wheat straw mud."

"Because I haven't been to the site with my own eyes, I feel that the plastering technique is very rough only from the photos. As for the lesions of the hollow drum murals, it is not only the force of geological factors on the cliff body, but also the most important one is caused by human factors."

Upon hearing this, Director Luo continued what Chuhe said: "You mean, the wheat straw mud prevents the water in the reinforced mud layer from evaporating quickly, stays inside the cliff body for a long time, and produces an introgression process along the capillary pores of the wall? "

"The general principle is this." Chuhe nodded.

Later, Chuhe saw several experts on the stage discussing in low voices.

He Dan asked Zhang Yongjin: "Is this student yours?"

"No, Tian Guyi's student, from Jinling University." Zhang Yongjin prompted.

He Dan suddenly realized: "It turns out that he is Lao Tian's student. No wonder. I said that this basic theoretical knowledge is so rich. I must have had a lot of private lessons from Lao Tian."

Elder Shan looked forward to it: "Although I am not good at restoring Dunhuang murals, what I heard from him seems to be well-founded. Who of you understand what he said?"

Director Luo looked at Xu Yiming, "Yiming, logically speaking, you have been to Dunhuang, so you should compare the situation there."

"Well, what he said is indeed true. The wheat straw mud seems to be the cause of the lesions of the hollow drum-like murals." Xu Yiming lived there for a period of time to study the murals in Dunhuang.

While they were discussing, the audience was also discussing in full swing.

Yang Shuo was very surprised and looked at Chuhe in disbelief: "I said, Chuhe, how much knowledge do you still have in your mind that we don't know?"

"That's right. I feel like we, as your team members, can hardly keep up with you." Xuelan Qi also teased.

Chuhe smiled wryly. In fact, he didn't know these so-called theoretical knowledge, and he didn't find it in the information.

It is because after upgrading his experience in the system, he found examples of repairing some murals accordingly, and he happened to find that wheat straw mud appeared in these cases, so he took out wheat straw mud for research.

Zhang Yongjin then looked at the members of the fourth group and asked, "Do you have any ideas?"

The members of the fourth group are composed of members of foreign cultural relics restoration organizations. After listening to Chuhe's set of theories, they all shook their heads and said in very blunt Chinese: "Sorry, we really don't understand this repairs."

Because of the abstention in the fourth group, He Dan looked at Chuhe: "There is chalk here, can you write the relevant introgression process on the blackboard?"

Chu He was startled, and nodded after thinking for a while: "Okay."

The remaining nineteen student team members seemed to serve as a backdrop, marveling at Chuhe's amazing knowledge of cultural relic restoration while learning curiously.

Chuhe took the chalk from Zhang Yongjin, while Zhang Yongjin squinted his eyes and said with a smile, "Write slowly, don't rush."

"Uh-huh."

Chu He came to the stage and wrote a string of letters on the small blackboard: Montmorillonite!

"Because the cliff body contains ingredients such as Montmorillonite, it is easy to expand and disintegrate when encountering water. Therefore, when water enters the molecular lattice gap, it will fill the gap and cause rapid expansion in volume, leading to disintegration."

"At the same time, the medium-cementing substances in the cliff body will also be more or less dissolved during the infiltration of water to cause aging, and finally cause new lesions."

While talking, Chuhe wrote down the molecular formula of Montmorillonite:

(OH)4Sig(AI3.34, Mg0.66)O20
|
Na0.66
Director Luo:
Zhang Yongjin:
Xu Yiming:
Yang Shuo and others: .
Seeing that everyone was so quiet, He Dan said to Chu He, "Chu He, how do you know this molecular formula?"

"I found this on Baidu." Chu He told the truth.

Hearing this, Yang Shuo finally breathed a sigh of relief: "I thought he pushed it out himself, then I really don't want to live."

Although Dong Lufan was a top student majoring in cultural relic restoration at Qingbei University, he still felt ashamed when faced with this molecular formula. He couldn't help but sigh: "It seems that we are really far behind Chuhe."

Director Luo saw that what Chu He said was clear and logical, so he also said to the students in the audience: "I didn't expect that talented people are born in every generation. The waves behind the Yangtze River push the waves ahead! Okay, today's Dunhuang mural restoration meeting is over. , everyone can go out and see the cultural relics from all over the world.”

Chuhe didn't expect Director Luo to dissolve the meeting directly, so he had no choice but to go offstage.

But Zhang Yongjin stopped Chuhe: "Chuhe, wait a moment, I have something to tell you."

Chu He froze for a moment, then waved with Yang Shuo and the others, "Go and see first, I'll come later."

Chuhe came to the five experts, bowed, and waited for their speech.

Shan Lao looked at Chu He and sighed: "Young man, you have learned this knowledge very solidly."

"I just happened to see the case, and then happened to study wheat straw mud," Chuhe explained sheepishly.

"But... do you know that in fact, those students in the conference hall today don't even know what the hollow mural is, but you have even found the principle of hollow-like lesions, and even the molecular formula you wrote , Forgive me for being ashamed, I was poor in chemistry when I was studying, and I didn't understand it." He Dan joked cheerfully.

(End of this chapter)