Why is medium sand preferred for pumping concrete?
Because the gradation of medium sand is reasonable, the content of particles below 0.3mm can reach about 15%. This part of the particles in the concrete mortar is close to the pipe wall in the pump pi…
Why should continuous-grained stones be preferred when pumping concrete?
Because when the maximum particle size of stones is the same, the void ratio of a single particle size is larger than that of a continuous particle size, large voids must be filled with mortar. Under …
Why is chlorpheniramine preferred over loratadine for common colds? _Kain Industrial Additives
Pheniramine (chlorpheniramine) is a “frequent” in commercially available cold medicines. As an antihistamine, chlorpheniramine can eliminate or reduce allergic symptoms such as tears, runn…
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