Fine concrete for hydraulic engineering modifiedby a multi-component additive МЕЛКОЗЕРНИСТЫЙ БЕТОН ДЛЯ ГИДРОТЕХНИЧЕСКОГО СТРОИТЕЛЬСТВА, МОДИФИЦИРОВАННЫЙ КОМПЛЕКСНОЙ ОРГАНОМИНЕРАЛЬНОЙ ДОБАВКОЙ
| Autor: | Aleksashin Sergey Vladimirovich, Bulgakov Boris Igorevich |
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| Jazyk: | angličtina |
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Vestnik MGSU, Iss 8, Pp 97-103 (2013) |
| ISSN: | 2304-6600 1997-0935 |
| Popis: | This article covers the design of an advanced multi-component additive and the study of its influence produced on the properties of fine-grained concrete. The authors also provide data on the earlier studies of the effect produced by domestic superplasticizers on the plasticity of fine-grained concrete mixtures and the curing behaviour of plasticized fine concretes. Russian-made superplasticizer Khimkom F1 was used to retain the plasticity of the fine concrete under consideration. Khimkom F1 produces a better effect on concrete curing than Polyplast SP-1, Cemactive SU-1, and Linomix SP 180-2. Superplasticizer Khimkom F1, as opposed to plasticizers based on lingo-sulfonate or naphthalene, for example S-3, has no bad odour; it is non-corrosive if applied to steel reinforcement inside concrete. The research has proved that the optimal amount of Khimkom F1 is 1.2% of the total amount of the binder.Metakaolin fume was used to improve the microstructure of the concrete, including its strength, waterand frost-resistance. Improvement of the above properties was proved in the course of the experiment. Its optimal content equals to 15% of the total amount of the binder. The study of the two domestically made water repellents (Sofexil40 and Sofexil 60-80) was conducted to identify and to compare their water and frost resistance. Experimental findings have proven that Sofexil 40 produces higher influence on the properties of the fine concrete, used for hydraulic engineering purposes, than Sofexil 60-80. The optimal content of the water repellent is 0.2% of the binder content. Sofexil 40 must be dissolved in the water in advance. Finally, the authors provide their experimental findings in terms of the optimal composition of the fine hydraulic concrete having pre-set properties.Рассмотрен вопрос разработки новой комплексной органоминеральной добавки, изучено ее влияние на свойства мелкозернистых бетонов. Приведены факты из проведенных ранее исследований по сравнению влияния отечественных суперпластификаторов на сохраняемость подвижности мелкозернистых бетонных смесей и динамику набора прочности пластифицированными песчаными бетонами. Приведены результаты экспериментального подбора оптимального состава мелкозернистого гидротехнического бетона с заданными свойствами. |
| Databáze: | OpenAIRE |
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