Geoecoprotective Properties of Binders for Transport Systems

Svatovskaya, Larisa; Shershneva, Maria; Bobrovnik, A. B.

doi:10.1016/j.proeng.2017.05.071

Cited by 10 publications

(2 citation statements)

References 23 publications

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“…A solution of given problems can be achieved by the maximum use of internal reserves of Portland cement and other components of the system as a result of high-performance chemical activation with the use of a new type of a multifunctional chemical admixture. At the same time the admixture of this kind must ensure efficiency in all these parameters [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

High-strength Concrete with new organic mineral complex admixture

2018

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There are the great problems of the concrete for high voltage the transmission lines obtaining. One of them is the creation of reinforced concrete centrifugally spun transmission towers with enhanced reliability and durability for high-voltage transmission lines having voltage of 110-750 kV. The second problem is the creation of high-quality reinforced concrete foundations to fix overhead electric line lattice towers in the ground because more than 50% of operated reinforced concrete towers and foundations are in need of repair or were put into repair. A complex high-performance organic mineral admixture for tower bodies of high-voltage transmission lines is developed. The main components of the admixture are polycarboxylate polymere and silica sol. It insures increased compressive strength and tensile strength in bending, freeze resistance, waterproofing and corrosive resistance. The obtained positive results allow to reduce a compression zone width and a crack growth width. The paper can be useful for not only the transport construction but and for concrete obtaining with special properties at any fields.

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Section: Introductionmentioning

confidence: 99%

High-strength Concrete with new organic mineral complex admixture

2018

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“…Since the interacting dispersed particles have AC with opposite polarities, it results in forming electro-heterogeneous contacts between them [18,23]. In [21], AC are compared with the acid-alkaline adsorption centers, from which the acid centers, according to the authors [25][26][27], determine the dissociative adsorption of water and are activators of the hydration process.…”

Section: Analytical Review Of the Literature Datamentioning

confidence: 99%

Interaction of Mineral and Polymer Fibers with Cement Stone and their Effect on the Physical-Mechanical Properties of Cement Composites

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Kostiuk

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et al. 2017

JERA

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Cement-based penetrating waterproof compounds compact the concrete structure due to penetration into the microcracks, pores and capillaries of slightly soluble crystalline hydrates. The coatings made from them do have some drawbacks such as low tensile strength and shrinkage, which may lead to cracks and reduce impermeability. Dispersed fiber reinforcement allows improving these parameters. The surface electric properties of glass fibers and polyester fiber were studied; their ability to be a substrate for the growth of crystalline hydrates was studied; X-ray phase and thermal analysis of cement hydration products with a complex chemical additive providing penetrating action were carried out; electron microscopic studies of the contact zone between fibers and crystalline hydrates were carried out; experimental studies of the dependence of the composition physical and mechanical and hydrophysical properties on the additive and fiber content were carried out. It was found that a dense liner of crystalline hydrates and hydrosilicate gel is formed around the glass fiber and polyester fiber with a silicone dressing size. Between the crystalline hydrates and the fiber surface, strong electro-heterogeneous contacts are formed, which provide the high physical and mechanical properties of the composite. The amount of the complex chemical additive and polyester fiber that provides the maximum strength and minimum water absorption of the composition is determined experimentally.

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