The most suitable brands replacing M-350 concrete are M 300 and m 400. Depending on the purpose of building structures, they can become substitutes for this concrete. The mix of m 300 can be used to fill foundations for low buildings, it is also advisable to use it for slabs and beams used at low loads. M 400 will replace the M-350 in the construction of bowls of pools, columns and crossbars.