Dudnyk L. Expanded clay concrete for thin-walled marine hydraulic structures

Research objective is to develop of expanded concrete mixtures with high stability for thin-walled marine hydraulic structures, in particular floating reinforced concrete, taking into account the complex action of the operating environment and the possibility of using rational types of cements. The working hypothesis of work - expanded clay concrete is an effective and promising material for thin-walled hydraulic structures, in particular floating reinforced concrete. The stability of expanded clay concrete in the conditions of complex action of the operating environment of thin-walled marine hydraulic structures can be ensured by the introduction of modifiers that increase water resistance and frost resistance of the material, especially effective polycarboxylate type superplasticizers. Express condition for stability in seawater is the corrosion resistance of concrete in a sulfate environment, which can be ensured primarily by the use of sulfate-resistant cements – straight Portland cements and cements with pozzolana. Also relevant is the problem of reducing the average density of expanded clay concrete, which in the construction of hydraulic structures can be solved through the use of porous sands with low permeability, in particular granular foam glass. The problem of providing decorative properties to expanded clay concretes of marine hydraulic structures without deteriorating their durability can be solved by using iron oxide pigments simultaneously with effective superplasticizers.