Listening to Professor Zhao's words, Li Wei really had cold pores - to be reasonable, he really used diatom mud before, didn't he say that diatom mud removes formaldehyde...... "That, Professor Zhao," Li Wei hurriedly asked: "Is diatom mud so bad?"

"I'm definitely not talking nonsense," Professor Zhao is obviously a very patient person, he thinks that Li Wei is willing to do conscience engineering and is willing to teach, and the other is also his professional habits, so this explanation is very detailed: "First of all, I have to tell you, where does formaldehyde mainly appear?"

There are many materials that can produce formaldehyde in decoration, the most important of which is from man-made panels.

Because the man-made board is made of urea-formaldehyde resin as a binder, the powder and fiber of the wood-based board are combined.

Urea-formaldehyde resin is synthesized by the reaction of formaldehyde and urea, containing unreacted free formaldehyde, which will also reversely react to release formaldehyde under certain conditions, so this is the main source of formaldehyde. ”

Then he may be afraid that Li Wei will not understand, so he simplistic: "In human terms, it is no formaldehyde and no glue." As long as it is glue, there is formaldehyde, and the difference is a matter of how much. ”

"Oh my God, it's so serious!" Li Wei was dumbfounded.

"Yes," Professor Zhao smiled and said, "Then let's talk about diatom mud next." A few years ago, it was said that diatom mud was the best, the value was super high, and the future was bright, and the merchants were also blowing the sky, so why has there been no movement in recent years? In fact, the reason is very simple. We have to understand what diatom mud is. ”

"Diatom mud, as we commonly call it, is made of diatomaceous earth mixed with lime, gypsum and other materials. Diatomaceous earth is the remains of silica left behind by the death of diatoms. Silica is all the more common and is an important part of sand and quartz. The main feature of diatomaceous earth is that it has many pores. ”

Speaking of this, Professor Zhao paused and said: "So can diatom mud really remove formaldehyde? Why do many people use diatom mud to detect formaldehyde and formaldehyde less? In fact, this is a misunderstanding. To put it simply, the so-called formaldehyde purification performance of diatom mud is nothing more than the temporary adsorption of formaldehyde by the porous structure of diatomaceous earth. Notice the word "temporary". ”

Li Wei nodded violently: "En, and then?"

It should be okay to be able to adsorb, right?

Professor Zhao didn't sell it, and gave the answer directly: "Under what circumstances, the release rate of formaldehyde will be accelerated?" The release of formaldehyde has a great relationship with the temperature and humidity of the indoor environment. In summer, due to high temperature and humidity, formaldehyde is released in large quantities, and then it is adsorbed by diatom mud. At this time, the diatom mud is equivalent to a battery, storing formaldehyde. Then in winter, the room is not ventilated, plus heating, formaldehyde is released all at once, which is particularly terrible. ”

Li Wei: "......"

Listen to what you hear, what is professionalism?

This is very easy to understand.

No wonder diatom mud has almost disappeared in recent years, and no one uses it, and other experts have directly studied it thoroughly!

"Thank you for consulting me," Li Wei was dumbfounded—knowledge is really useful!

"I also heard Xiao Guo say that the quality of the project you do is very good, so I am willing to talk to you for a while," Professor Zhao laughed and said: "There are not many young people like you who are willing to do good things now, and it is rare to meet one, of course I want to talk more." ”

"En," Li Wei continued to ask, "Then Professor Zhao, what do you think is the best thing to put on this wall?"

"In fact, the simplest is latex paint," Professor Zhao said: "Latex paint is the most environmentally friendly method for wall materials, and it is more environmentally friendly than latex paint. ”

Is latex paint so good?

Li Wei has always felt that the decoration, the grade, the diatom mud in the whole house, at first glance, is better than latex paint, right?

It turned out now that it wasn't like that at all.

Professor Zhao said that latex paint is the most environmentally friendly, so what else do you say, just use this!

"Okay!" Li Wei slapped his thigh fiercely: "All the walls of the room, all those who can paint this are painted for him!"

That's expensive, just buy which, that's right!

What is a loser-style decoration?

That's it!

The project done by the buddy must be completely dried up formaldehyde, which is the brand and label of the buddy in the future!

Formaldehyde-free, pollution-free decoration!

Whoever says it's not easy to do anything, tell us to do those who have no quality, Lao Tzu doesn't serve!

"Haha, I'm relieved that you're so responsible," Professor Zhao said with a smile: "Since you're decorating the kindergarten, I'll say something else to you." Generally speaking, formaldehyde is the most harmful indoor pollutant, because glue has to be used everywhere. But TVOC is not small, and you have to pay attention to it. For example, sofas, doors, floors, etc., will cause the production of these pollutants to a greater or lesser extent, so you need to pay attention. In addition, decoration, curtains, etc., should also be paid attention to. ”

Li Wei thought for a while, and then asked: "Then Professor Zhao, generally speaking, what is the best material to use when decorating? My side is almost full of geothermal paving, and behind it is the floor tiles of the kitchen and toilet, and the classroom has not been thought of yet, my plan is to lay the floor, and the board on the wall is made of solid wood." How's this going?"

"Solid wood is okay," Professor Zhao affirmed this time: "The formaldehyde content of solid wood in its natural state is very low, but it is not guaranteed whether inferior reagents are used in the processing process, such as anti-corrosion, adhesion, etc., so when you buy, it is best to find a big brand, and the quality can be guaranteed." ”

"Jacket, okay, I understand!" Li Wei was overjoyed, and he almost understood the basic decoration traps.

He said happily: "Thank you, Professor Zhao, I will definitely ask you in person when I have the opportunity." ”

"Haha, seeing that you are so polite," Professor Zhao said: "Work hard, it is the luck of the children to have such a person like you who is willing to do conscientious work, it doesn't matter if I have time, SY can come to me when you have time." ”

Li Wei: "Okay! No problem! Then Professor Zhao will add you to WeChat in a while?"

Professor Zhao: "Okay, let's do it." ”

Ending the call with Professor Zhao, Li Wei let out a sigh of relief: "It's a shame to ask, otherwise it's really a pit." ”

At this time, Guo Chao finally had a chance to speak, and he asked, "Boss, what ......do you think?"

Li Wei squeezed his fists fiercely and said, "Don't say anything, let's use all the best materials for him!" Brother Guo, help me see what work we still need to do in the future, and which ones are the most expensive. We now have more than 1.8 million left in the budget, leaving 200,000 for emergencies, which means that we have to spend at least 1.6 million. ”

Spending money is a technical job!

As soon as Guo Chao heard this, he immediately felt like he had been beaten again!

"No problem, boss, then let's start counting," he said, took the laptop, and began to point out to Li Wei in the same way: "At present, according to the progress of our project, the geothermal heating is completed, the toilet and kitchen are finished, and the corridor and hall are finished." Then the rest is the big white of the twelve classrooms, this one is painted with latex. Then there is the suspended ceiling, which does not have much expenditure, mainly labor. The stairs on both sides, boss, if you are willing to spend money, we will make solid wood stairs?

Li Wei slapped his thigh fiercely: "This can be had!"

Wang Xuan on the side covered her face - the calf is over, the kindergarten has to have a solid staircase, this is really going to the villa grade!

Do you still recruit teachers in kindergarten?

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