The article analyses applications of waste produced by thermal power plants and used by the road construction industry. One of the promising areas for the use of ash and slag materials is their reinforcement with inorganic binders and using for the construction of pavement. The Russian regulatory documents governing the use of ash and slag materials have several drawbacks, including the lack of recommendations for determining the elastic modulus for bases and coatings made from ash and slag mixtures reinforced with an inorganic binder in laboratory conditions. The lack of these recommendations does not allow the selection of the mixture with specified design values of the elasticity modulus. It makes it difficult to ensure required values of the modulus of elasticity in the construction of road pavement. The authors developed a method for determining the elasticity modulus in laboratory conditions in order to produce materials with specified values of the elasticity modulus and improve quality of design and construction of road pavement from ash and slag mixtures reinforced with inorganic binders.

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The article discusses the methods for producing laboratory samples of soils reinforced with inorganic binders. In the Russian Federation, production of laboratory samples of reinforced soils is regulated by SS 23558-94 “Road and airfield construction mixtures of black stone, gravel-sand and soils reinforced with inorganic binders. Technical conditions (with amendments No 1, 2) and SS “Public roads. Soils reinforced with inorganic binders. Specifications”. These documents describe two approaches to sample production: the impact method and the static load method. The article studies the application of these methods in the laboratory conditions. It was found that the impact method has a number of drawbacks that distort physical and mechanical characteristics of reinforced soils. It was found that the static load method is the most accurate and less labor intensive. The use of cylindric forms for producing samples of reinforced soil simplifies the production process and improves geometric characteristics of the samples.