Experience of introduction of fine-grained concrete when producing road plates

Engineering and construction of roads, subways, airfields, bridges and transport tunnels

In this paper an example of introduction of fine-grained concrete in production of ferroconcrete products is reviewed. The study is important because a high-quality material can be obtained with the use of local raw materials. Advantages of high-strength fine-grained (sandy) concrete are decrease in the mass of structures in bearing elements of buildings due to the reduced volume of concrete (to 50%). This decrease minimizes use of all materials being part of concrete (down to 50%), and when sizes of sections are equal, it is also possible to cut down the expenses on reinforcing steel (by 30%). Moreover, labor input on production, transportation costs and the given expenses decrease too. The traditional concrete mix for road plates of permanent roads (coarse-grained concrete of the class B25) has been replaced by the developed fine-grained B60 concrete. It was shown that the use of sandy concrete of the class B60 for production of road plates leads to increased bearing capacity. Tolerance by deformation indicators is 80%, by strength indicators more than 100% with respect to the control loadings specified in Russian standards.