Investigation of the operating properties of cement-concrete products modified by complex additive
Journal Title: Вісник Одеської державної академії будівництва та архітектури - Year 2018, Vol 1, Issue 72
Abstract
The article is devoted to the problem of improving the performance and technical characteristics of the road surface and increasing its durability and durability. Changing the conditions of roads in recent decades has led to the need to improve the durability of the layers of cement-concrete pavements. Expanding construction of rigid pavements will allow to effectively solve the problem of a significant increase operability and durability of roads, and it is necessary to develop a cement concrete with improved technological and operational properties, which include, in particular, with complex cement-concrete additives. In the course of the experiment, cement concrete was obtained from concrete slurry mixes (cone draft of 2-3 cm) and high mobility (cone sediment 16-18 cm) of different compositions with or without a modifier additive. The issues of development of warehouses of concrete mixes and cement concrete modified by a complex additive of polycarboxylate type and investigation of their technological and operational properties are considered. It is shown that the use of a modified complex additive can reduce up to 20% water for mixing, obtain a mixture of high viability, which reduces the cost of inserting and sealing the concrete mixture. The investigated concrete mixtures are characterized by high sensitivity of rheological properties to changes in water content. The results of studies of the impact modifier additives on physical and mechanical properties of cement-concrete curing different dates, show that developed modified cement-concrete with high early strength (3 days) and branded strength (28 days). Economical concretes of the class В30-В35 with increased durability were created. The resulting road concrete is characterized by improved technological properties (bundle, density, water absorption) of concrete mix and operating parameters (strength, water resistance, frost resistance, abrasion) of cement concrete.
Authors and Affiliations
G. J. , Shevchuk, N. I. Topylko, N. P. , Genseckiy, O. P. , Gnyp, I. I. Grynyova
Keywords
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