Some experts have pointed out that the concrete industry is essentially a "fresh industry".
Why do you say that? In addition to cement, there are all kinds of sand and stone aggregates, fly ash and so on in
concrete. Once these raw materials are mixed, they have to start racing against time. In terms of industry practice, a concrete mixing station must have raw materials from within 200 kilometers, and customers must be within 50 kilometers. Everyone who has done engineering knows it. Concrete drivers are most afraid of traffic jams! Because the properties of concrete after mixing will change irreversibly with time and environment, once the mixer truck is blocked on the road, it will solidify and scrap overtime, and become a large lump of construction waste. Isn't
this more anxious than litchi in Chang'an?
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