Durability properties of high volume fly ash self-compacting fiber reinforced concretes

Stechyshyn, Mykhaylo; Sanyts'kyy, Myroslav; Pozniak, Oksana

doi:10.15587/1729-4061.2015.44246

Cited by 13 publications

(3 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, ECC uses a significant amount of cementitious materials, often up to 70%, which leads to significant shrinkage deformations, limiting dimensional stability and increasing the cost of the material [8,9]. Supplementary cementitious materials, including ultra-dispersed mineral additives, are used to improve the quality of concrete [10,11]. Methods that prevent the occurrence of corrosion by covering the surface with protective materials or creating artificial waterproofing are also effective [12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Badania nad odpornością powłok ochronnych dla betonu na działanie wilgoci atmosferycznej

Sydor,

Margal,

Gayda

2024

Bud-Arch

View full text Add to dashboard Cite

The development of the construction industry has led to increased requirements for the operational properties of building materials in general and concrete in particular. Although concrete is designed primarily to withstand structural loads, it must also resist environmental influences to increase its durability. This article presents the results of the influence of the components of protective coatings on the hydro-physical properties of concrete. The edge wetting angle in concrete with a protective coating ranges from 95 to 101 degrees, which is about twice that of uncoated concrete. The mass of concrete under the influence of hygroscopic moisture increases, and after 30 days of exposure, it is 1.1–1.6 wt. % compared to 5.7–5.8 wt. % for control samples. The minimum increase (1.1–1.2 wt. %) is achieved when using coatings with the largest amount of heat-resistant varnish KO-08. The water absorption of the developed coating compositions decreases after 30 days of being in water from 5.2 to 1.6–2.2 wt. % for C20/25 concrete. Low temperatures negatively affect the hydrophysical properties of protective coatings, but only slightly. It has been found that water absorption increases by approximately 20 %.

show abstract

Section: Introductionmentioning

confidence: 99%

Badania nad odpornością powłok ochronnych dla betonu na działanie wilgoci atmosferycznej

Sydor,

Margal,

Gayda

2024

Bud-Arch

View full text Add to dashboard Cite

show abstract

“…FA is a by-product of electricity generating plants. It is used both in the technology of cement and concrete production [ 20 , 27 ]. It has positive influence on the properties of fresh and hardened concretes such as workability, strength, drying shrinkage, thermal properties, and abrasion resistance [ 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Properties of Concretes Incorporating Recycling Waste and Corrosion Susceptibility of Reinforcing Steel Bars

et al. 2021

View full text Add to dashboard Cite

In this paper, properties of concretes incorporating recycling waste and corrosion susceptibility of reinforcing steel bars were studied. It was established that fineness of ground granulated blast furnace slag (GGBFS) and fly ash (FA) and their simultaneous combination have an influence on the kinetics of strength development of Portland cements and concretes. The compressive strength of concrete containing 10% by mass of GGBFS and 10% by mass of FA even exceeds the compressive strength of control concrete by 6.5% and concrete containing 20% by mass of GGBFS by 8.8% after 56 days of hardening. The formation of the extra amount of ettringite, calcium hydrosilicates as well as hydroaluminosilicates causes tightening of a cement matrix of concrete, reducing its water absorption, and improving its resistance to freezing and thawing damage.

show abstract

“…Modern composite building materials cannot be imagined without the use of chemical additives. Chemical additives are introduced to give mortars the appropriate qualities [6,7].…”

mentioning

confidence: 99%

Kinetics of Rheological Characteristics of Foam Concrete Mixture

Martynov¹,

Martynova²,

Elkin³

et al. 2021

BOSACEA

View full text Add to dashboard Cite

Abstract. The results of experimental studies are presented, the purpose of which was to study the influence of variable formulation and technological factors on the rheological characteristics of the foam concrete mixture, in particular, the structural strength. This is preceded by an analysis of the process of structure formation of cellular concrete. As a result, it is shown that the properties of cellular concrete are determined by the nature of the distribution of the solid component. The structure of the solid phase is formed at the earliest stages of the formation of cellular products and depends on the rheological characteristics of the mortar and cellular mixture. In the technology of cellular concrete, it is important to synchronize the processes of pore formation and the growth of plastic (structural) strength, which is also associated with a change in the rheological properties of the mixture. Using the methods of mathematical statistics, the influence of the content of the filler in the mixture with cement, the content of the complex additive, and the effect of mechanical chemical activation on the kinetics of the plastic strength of the foam concrete mixture were studied. The kinetic dependences of the plastic strength of the foam concrete mixture in the range of 6 ... 24 hours from the moment of manufacture have been constructed. Each of the 15 curves is maximized by a 3rd-degree polynomial. Based on the obtained dependences, they are differentiated between the first and second derivatives. As a result, the equations of the speed and intensity (acceleration) of the plastic strength of the foam concrete mixture were obtained. According to the results of the previous experiment, carried out according to a three-factor plan, a 4-factor plan was synthesized, in which the aging period of the foam concrete mixture was taken as the fourth factor. The calculated theoretical values of the characteristics of the structural strength of the foam concrete mixture were entered into the matrix. As a result, mathematical models of plastic strength, speed, and intensity of plastic strength of the foam concrete mixture were calculated and the influence of variable factors studied on the isosurfaces of these properties was visualized. The analysis of these dependencies made it possible to determine the characteristic recipe and technological conditions for obtaining a foam concrete mixture with the required values of plastic strength.

show abstract

Durability properties of high volume fly ash self-compacting fiber reinforced concretes

Cited by 13 publications

References 3 publications

Badania nad odpornością powłok ochronnych dla betonu na działanie wilgoci atmosferycznej

Badania nad odpornością powłok ochronnych dla betonu na działanie wilgoci atmosferycznej

Properties of Concretes Incorporating Recycling Waste and Corrosion Susceptibility of Reinforcing Steel Bars

Kinetics of Rheological Characteristics of Foam Concrete Mixture

Contact Info

Product

Resources

About