Every week when I read readers' comments, I feel mad and amused. At first, I didn't want to respond to some worthy but provocative messages. Julia from Tianlu College said to me: "Zheng Bo, I just attended a seminar in the electric power industry and got an inspiration. I found that actually By writing the Green Academy column, it reminds us that we must continue to maintain an outsider's perspective in order to bring innovation and adapt to changes in the industry." As an insider, how to keep the eyes of an outsider?
It's an interesting idea, and answering readers' questions may be a way to keep that perspective. If you find the content of my answer photo background removing below a bit difficult to understand, you can click on my personal page below the article, look back at the previous article, understand the cause and effect, and clarify your doubts. Don't lie to the cement industry. Don't you also import some cement clinker to mix in the concrete? If you change the material into imported cement and have to submit it for review, which is simply not feasible in practice, where is the current imported cement used? Yes, imported cement clinker is indeed mixed in concrete, and it has been used in various projects for a long time, so it is not impossible to use it.
The problem is that if the imported cement is not in accordance with the specifications, it will expose you to unnecessary risks of violations. According to the specification, when the concrete ratio is determined by the trial mix, the materials for the trial mix should be the materials intended to be used in the project. After the quality of the trial mix is confirmed, it can be used in the project after being reviewed by the supervision unit. After the concrete proportioning design of various specifications has been approved, the source, quantity, material gradation, proportion, etc. of the materials shall not be changed without the approval of the Engineering Department. If there is any change, the new proportioning design shall be completed first and submitted Ask the Engineering Division for approval.