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Information × Registration Number 0224U031387, 0121U112701 , R & D reports Title Perform research and develop a method for rapid assessment of frost resistance of road cement concrete popup.stage_title Head Tolmachov Serhii М., Доктор технічних наук Registration Date 19-04-2024 Organization Kharkiv National Automobile and Road University popup.description2  FROST RESISTANCE, FROST RESISTANCE COEFFICIENT, STRENGTH, MEDIUM DENSITY, SUPER PLASTICIZER, BREATHABLE ADDITIVE, CEMENT ROAD CONCRETE The object of the study is road cement concrete with superplasticizer and air-entraining additives. The purpose of the work is to carry out cement concrete tests on frost resistance at an early age and 28 days on selected cements and chemical additives, and establishing a transition coefficient. Research methods – empirical methods (observation, comparison, research). Standard methods of determining the strength and frost resistance of concrete were used in the experimental studies. An analysis of literary sources on assessment methods was carried out frost resistance and frost-salt resistance of concrete, currently used in Europe, the USA, and Ukraine. The kinetics of strength gain of concrete classes by strength were studied C16/20....C35/45 on cements of various cement plants of Ukraine. The frost resistance of concrete containing only a superplasticizer, as well as a complex of superplasticizer + air-entraining additive and hardened 3, 7, and 14 days before the beginning of the tests, was studied. The transitional coefficients from the coefficients of frost resistance at the age of 7 and 14 days to the coefficient of frost resistance at the age of 28 days have been established. On the basis of the research, relevant conclusions were drawn and a method was written for the express assessment of frost resistance of road cement concrete Product Description popup.authors Ilyin Yaroslav V Belichenko Olena А. popup.nrat_date 2024-04-19 Close