In the 1970 s during the construction of Toktogulskaya HPP m in layer-by-layer technology,the developers have formed the view that in the inner zone of the dam there would be technologically and economically feasible to lay special concretes and concrete mixes.Their main distinction from vibrated concrete would have been the factor that just after laying and compaction such concrete mixes would be able to bear construction loads and,at the same time,be harmoniously combined with the technology of layer-by-layer concreting Search and laboratory and field testing of such concretes and mixes took several years and were mainly conducting with superhard concrete mixes.
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