A group of people went up to the top of Building 3.

Cheng Yingxuan's QQ car is equipped with flat shoes. Before she got off the car, she had replaced the high heels she usually wear with flat shoes.

The cracks in the swimming pool were observed on the top floor. The cracks were generally wide and irregular with little fingers, and they spread throughout the swimming pool.

"Cheng Gong, look, what caused this concrete crack? What should I do now?" Liu Jin was anxious.

Cheng Yingxuan professionally judged after looking around, "There are many causes of concrete cracks, structural deformation, uneven settlement, unreinforced steel protection layer, and lack of structural ribs will cause cracks. This time the swimming pool cracks It’s a crack caused by an inappropriate mix. As for what to do..."

She turned to Lan Jinchen and said, "Lan Lan, there are two treatment methods. One is to fill up the cracks with professional leakage repair materials, and then apply a surface to the concrete surface. In this way, there is no appearance. There will still be water leakage in the future. Risk. The second way is to knock out the poured concrete and re-cast it. The cost of the second kind is most, you are the boss, see what you mean."

"The second kind." Lan Jinchen said, "My Lanshi Group is most concerned about quality, it is impossible to save costs, so that customers who build houses in the future will bear the risk."

Cheng Yingxuan said to Liu Jin, "According to President Lan."

Liu Jin nodded.

Cheng Yingxuan stared at another building under construction before building to the second floor. "Which company's concrete is used in Building No. 5?"

Liu Jin said, "Yongming Commercial Concrete."

Lan Jinchen frowned, "Cheng Gong, as a senior engineer, don't know which concrete to use?"

"Lan Lan, I have just been promoted. I am only responsible for building No. 8 in the construction of the Lanyue project, and dealing with technical problems that cannot be solved by the entire Blue building." She said, "I am not responsible for the breakdown of the No. 5 building. ."

"It turned out to be this way." Lan Jinchen nodded and asked Liu Jin, "How many concrete grades are being used for building slabs in Building 5?"

"C35." Liu Jin answered anxiously.

Lan Jinchen asked Cheng Yingxuan, "How about Cheng Gong?"

Her eyes glanced at Liu Jin's face, "Building No. 5 is built at a height of thirty floors, and it is now poured into the second floor slab without using C35 concrete. C30 concrete can reach 25 MPa in seven days, 28 The strength of the day is 1.5 times that of seven days, and 60 days increases three megapascals compared to 28 days. Concrete is different from self-mixing, the longer the time, the higher the strength. The strength of C30 concrete is sufficient. The cost of C35 is better than C30 High, for cost reasons, the C30 is affordable."

In this position, she is not only responsible for the safety of high-rise buildings, but also has to save money for her boss. Otherwise, why would she be invited?

"Cheng Gong said yes." Liu Jin nodded quickly.

Lan Jinchen is not easy to fool, "Liu Jin, you as a supervisor, don’t you know that you don’t need to use C35 concrete?"

"I..." Liu Jin had to lie, "I just want the building to be stronger."

"It's really the case, it would be better. If you secretly use any means......" Lan Jinchen's words were not finished, Liu Jin was already cold sweat dripping down his forehead. Looking at his appearance, it was obviously a ghost in his heart.

Cheng Yingxuan ran on the construction site from the beginning of his freshman year. Of course, he knew that the supervision of Liu was full of money. It must have made the company pay the C35 money to buy the concrete. In fact, the quality of the C30 issued by the mixing station, the difference in the middle, went into his own pocket. As long as it does not affect the quality, she is also inconvenient.

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