The influence of complex additives based on calcined clays and carbonate fillers on hydration products composition of blended cement stone

Ermilova, Elizaveta; Камалова, З А

doi:10.1051/e3sconf/202127404004

Cited by 3 publications

(4 citation statements)

References 4 publications

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“…Surface chalk particles covered free silicic acid. At interacted with calcium hydroxide and silicic acid low basic calcium hydrosilicates are created to can be explain to create hydrate neoplasms is calcium hydrocarboaluminates [7,11]. Addition efficiency highly dispersed chalk is determined not only interacted with clinker minerals but also compaction of the microstructure due to the placement of grains of the addition in the gaps between the grains of cement.…”

Section: Discussion Of Results Obtained In the Studymentioning

confidence: 99%

“…To determine the corrosion resistance, an express method was used, developed by M.I. Strelkov [11] and beams 70×70 ×280 mm were made. The basis, concentration diagram of the four-component system (Na +, Mg2 +, Cl-, SO42-) was used proposed by M.I.…”

Section: Methods For the Determination Of Corrosion Resistancementioning

confidence: 99%

“…Strelkov. According to [11], the high aggressiveness of this system is due to the formation of compounds with a high molecular weight as a result of chemical interaction between the salts of the system: NaCl, Na2SO4, MgCl2, MgSO4, and products of hydration cement.…”

Section: Methods For the Determination Of Corrosion Resistancementioning

confidence: 99%

“…Figure 2 Electron microscopic image of the surface of natural chalk ((Sloviansk field, Ukraine): а, б -increasing in 5000 [8,22] Chalk contains cations included in the composition of most clinker minerals. The surface of chalk in water dispersion has excess negative charge moreover, a smaller negative potential is matched the equipotential point of chalk which is pH from 5 to 7 [11]. This is explained by the fact that, according to [8], the chalk surface is covered with an amorphous form of silica; therefore, the mechanism of interaction of chalk with clinker minerals and their hydration products differs significantly from the known mechanisms of interaction of other carbonate rocks.…”

Section: а) B)mentioning

confidence: 99%

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Increase in physical and mechanical properties of decorative concretes for the post‐war restoration of residential and public buildings in the Kharkiv region with the addition of highly dispersed calcite (chalk)

Chepurna,

Dudka,

Chepurnyi

2023

ce papers

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During the war active, a huge number of residential and public buildings were destroyed not only in Kharkiv and the region, but throughout Ukraine. For the restoration of destroyed buildings, new types of cement will be needed to look for and will be created decorated concretes based on them that would provide high operational and technological properties of constrictions and will be focused on local materials. Carbonate additive such as highly dispersed calcite (chalk) can be used for as local additive for concrete due to significant reserves are located in Kharkiv region. In the article research on the impact of joint action additive of highly dispersed calcite (chalk) and natural pigment (ocher) is presented by physical and mechanical properties such as density, strength, water resistance, and frost resistance. It has been established that, depending on the percentage of highly dispersed calcite (chalk), the physical and mechanical properties are changed irregularly. On the basis of the conducted researches it was established that the optimal amount of the addition of high‐fossil chalk, which provides increased frost resistance and corrosion resistance of concrete in an aggressive environment, containing chlorides, sulfates and magnesium ions, is from 10 % to 30 %. In addition, it increases density, compressive strength, stretching strength at bending. At the same time, it should be noted at an increased amount of fine chalk to 40% leads to a decrease in physical and mechanical characteristics. But the introduction of plasticizer in the amount of 0.5% leads to increased compressive strength and, accordingly, increases the positive qualities of chalk. The concrete compositions that getting with high decorative and operational properties are allowed to use them for the restoration of the city and increase in urban space.

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Section: Discussion Of Results Obtained In the Studymentioning

confidence: 99%

Section: Methods For the Determination Of Corrosion Resistancementioning

confidence: 99%

Section: Methods For the Determination Of Corrosion Resistancementioning

confidence: 99%

Section: а) B)mentioning

confidence: 99%

See 2 more Smart Citations

Increase in physical and mechanical properties of decorative concretes for the post‐war restoration of residential and public buildings in the Kharkiv region with the addition of highly dispersed calcite (chalk)

Chepurna,

Dudka,

Chepurnyi

2023

ce papers

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Ductility response of RC beams composed of limestone calcined clay cement (LC3) and polypropylene (PP) fibre

Seralathan

Valavan

Eswari

et al. 2023

Materials Today: Proceedings

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Recycling of Cement–Wood Board Production Waste into a Low-Strength Cementitious Binder

2022

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Cement is a widely used building material, with more than 4.4 billion metric tons produced in 2021. Unfortunately, the excessive use of cement raises several environmental issues, one of which is the massive amounts of CO2e produced as a by-product. Using recycled materials in the concrete mix is widely employed to solve this problem. A method for minimizing the use of natural cement by substituting it with secondary cementitious material that consists of wood–cement board manufacturing waste has been studied in this paper. The cement in the waste stream was reactivated by a mechanical treatment method—the use of a planetary mill, allowing it to regain its cementitious properties and be used as a binder. Physical and mineralogical analysis of the binder material was performed using X-ray diffraction (XRD), thermogravimetry/differential thermal analysis (TG/DTA) and Brunauer–Emmett–Teller analysis; granulometry and compressive strength tests were also carried out. The results show that the grinding process did not significantly change the mineralogical composition and the specific surface area; it did, however, affect the compressive strength of the samples prepared by using the reactivated binding material; also, the addition of plasticizer to the mix increased compressive strength by 2.5 times. Samples were cured in high-humidity conditions. The optimal water-to-binder (W/B) ratio was found to be 0.7 because of the wood particles that absorb water in their structure. Compressive strength increased as the grinding time increased.

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The influence of complex additives based on calcined clays and carbonate fillers on hydration products composition of blended cement stone

Cited by 3 publications

References 4 publications

Increase in physical and mechanical properties of decorative concretes for the post‐war restoration of residential and public buildings in the Kharkiv region with the addition of highly dispersed calcite (chalk)

Increase in physical and mechanical properties of decorative concretes for the post‐war restoration of residential and public buildings in the Kharkiv region with the addition of highly dispersed calcite (chalk)

Ductility response of RC beams composed of limestone calcined clay cement (LC3) and polypropylene (PP) fibre

Recycling of Cement–Wood Board Production Waste into a Low-Strength Cementitious Binder

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