Strength and Durability of Concretes With a Super Absorbent Polymer Additive

Sharafutdinov, Kamil; Saraykina, Kseniya; Kashevarova, Galina G.; Sanyagina, Yana; Erofeev, Vladimir; Vatin, Nikolai Ivanovich

doi:10.22337/2587-9618-2023-19-2-120-135

Cited by 3 publications

References 25 publications

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Features of the Behavior of Highly Frost-Resistant Modified Concretes

Shuldyakov,

Butakova,

Mordovtseva

et al. 2024

Construction Materials

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One of the main criteria of construction is reliability and durability. Therefore, for the implementation of modern construction projects, especially in harsh operating conditions, cement composites with increased resistance to aggressive external cyclic influences are necessary. For the climatic conditions of the Russian Federation, special attention should be paid to ensuring the frost resistance of concrete. Thus, in accordance with GOST 31384–2017 “Protection of concrete and reinforced concrete structures from corrosion. General technical requirements”, for the lowest temperature and under the condition of alternating freezing and thawing of concrete in a saturated state, the frost resistance mark must be at least F2450. In addition, high mechanical characteristics of the materials used, including the modulus of elasticity, are required, for example, in the construction of infrastructure facilities in the Arctic zone of Russia. To ensure these characteristics, effective modifying additives must be introduced into the concrete mix. However, there is evidence in the literature that water-reducing additives of various genesis, with similar values of water reduction, have different effects on the structure of the formed cement stone. Therefore, in order to ensure high durability of concrete, this article will consider the relationship between the emerging structure of cement stone in concrete and its resistance parameters.

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Features of the Behavior of Highly Frost-Resistant Modified Concretes

Shuldyakov,

Butakova,

Mordovtseva

et al. 2024

Construction Materials

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Biological Resistance of Concrete and Other Cement Composites

Масенина

2024

Перспективные Исследования В Технических И Естественных Науках: Сборник Статей Международной Научной Конференции (Санкт-Петербу

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Статья посвящена исследованию биологического сопротивления бетонов и других цементных композитов, которые широко применяются в современном строительстве. Несмотря на высокие эксплуатационные характеристики, такие как прочность и долговечность, бетон подвержен биологической коррозии, вызванной воздействием микроорганизмов, включая бактерии, грибы, водоросли и лишайники. В работе рассматриваются основные виды микроорганизмов, способных разрушать бетонные конструкции, и анализируются факторы, влияющие на биологическое сопротивление материала. Особое внимание уделено химическим, физическим и эксплуатационным методам повышения устойчивости бетона к биологическому воздействию, включая использование антимикробных добавок, гидрофобизаторов и защитных покрытий. Рассмотрены также современные подходы к улучшению состава и структуры бетона для увеличения его стойкости и долговечности. Полученные результаты позволяют разработать эффективные методы защиты бетонных конструкций, что способствует повышению их безопасности и надежности. The article is devoted to the study of the biological resistance of concrete and other cement composites, which are widely used in modern construction. Despite its high performance characteristics such as strength and durability, concrete is susceptible to biological corrosion caused by exposure to microorganisms, including bacteria, fungi, algae and lichens. The paper considers the main types of microorganisms capable of destroying concrete structures, and analyzes the factors affecting the biological resistance of the material. Special attention is paid to chemical, physical and operational methods of increasing the resistance of concrete to biological effects, including the use of antimicrobial additives, hydrophobizers and protective coatings. Modern approaches to improving the composition and structure of concrete to increase its durability and durability are also considered. The results obtained make it possible to develop effective methods of protecting concrete structures, which contributes to improving their safety and reliability.

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Modification of Hydraulic Engineering Concrete Properties by Additives Based on High Molecular Weight Compounds

Samchenko,

Tobolev

2024

Technique and Technology of Silicates

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Ensuring high water resistance, frost resistance and corrosion resistance of hydraulic structures is achieved by creating concrete with a dense structure that can absorb aggressive influences. This is possible by modifying the structure of concrete with polymer additives of new generation. The introduction of polymer additives has a plasticizing effect and contributes to the preservation of technological properties of the concrete mixture, modifies the pore structure of concrete and influences the formation of cement stone strength. The paper presents the results of research on the effect of polymer additive based on polyvinylpyrrolidone on the basic properties of Portland cement binder. It was found that the compressive strength at the age of 2 days increases by 7% at the content of polymer additive in the amount of 0.8%. Also, in-troduction of polymer additive increases the compressive strength at the age of 28 days at its content of 0.6 and 0.8% by 22 and 27%, respectively. The effect of polymer modifier on the formation of the initial structure, manifested in the increase in the time of the beginning and accel-eration of the end of setting has been established. The kinetics of heat release of cement dough in the presence of polymeric modifier in the amount of 0.6 % has been studied. The data on the phase composition of cement stone in the presence of polymer modifier are given. It is established by means of electron microscopic analysis that the introduction of polymeric admixture promotes modification of cement stone microstructure with formation of more dense homogeneous structure. The given research results are taken into account in the development of concrete compositions with a set of specified properties required for the construction of hydraulic structures.

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Strength and Durability of Concretes With a Super Absorbent Polymer Additive

Cited by 3 publications

References 25 publications

Features of the Behavior of Highly Frost-Resistant Modified Concretes

Features of the Behavior of Highly Frost-Resistant Modified Concretes

Biological Resistance of Concrete and Other Cement Composites

Modification of Hydraulic Engineering Concrete Properties by Additives Based on High Molecular Weight Compounds

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