Research of impact resistance of nanomodified fiberreinforced concrete

Marushchak, Uliana; Sanytsky, Myroslav; Sydor, Nazar; Braichenko, Serhii

doi:10.1051/matecconf/201823003012

Cited by 12 publications

(6 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Дисперсні карбонатні породи [29,30], мають певну хімічну спорідненість до шлаколужного цементу і розмір частинок, близький до розміру частинок шлаколужного цементу. Незважаючи на певну хімічну інертність, це, однак, обумовлює їхню взаємодію з гідратними новоутвореннями шлаколуж-ного цементу в якості центрів кристалізації та сприяє формуванню кристалізаційних контактів з утворенням нового цементу на рівні мікроструктури [31,32], що забезпечує поліпшення експлуатаційних властивостей бетону. Після 150 циклів заморожуваня / відтавання (що еквівалентно F200) втрати маси зразків були відсутні, максимальне падіння міцності склало 3,87%, лущення поверхні зразків не спостерігалося.…”

Section: міцністьunclassified

Performance Characteristics of Slag-Alkali Decorative Cements and Mortar

Kryvenko¹,

Gots²,

Гелевера³

et al. 2022

БКТП

View full text Add to dashboard Cite

The use of slag-alkaline cements as decorative cements is quite promising. When using bleaching additives TiO2, kaolin and CaCO3, white cements with a degree of whiteness of 70...94%were obtained. But in addition to decorative properties, such cements and materials based on them are subject to requirements to ensure the necessary technological and operational properties.The article discusses the main operational properties of decorative slag-alkaline concrete mortars - long-term strength, water-holding capa-city of mixtures, resistance to fflorescence, resistance to steaming and exposure to atmospheric factors(frost resistance, weather resistance, color stability).It has been established that white slag-alkali cements at the age of 28 days have a compressive strength of 49...56,8 MPa. All compositions of white cements have good hardening dynamics and, based on the strength at the age of 2 days 35...37 MPa, they can be classified as fast hardening. It hasbeen established that in the long term (3 months ormore) the strength of slag-alkaline decorative cements practically does not differ from the control compositions and amounts to 66,5...67,5 MPa.All compositions of slag-alkaline decorative solutions demonstrate high frost resistance. It has been established that the loss of their strength after 150 cycles of freezing and thawing (which corresponds to the F200 brand) is only 1,73...3,87%, there are no weight losses, no surface peeling is observed. All samples of slag-alkaline decorative mortars containing bleaching additives successfully passed the weather resistance test. Their strength loss after 100 cycles of soaking and drying amounted to 6,5...9,2% with an allowable 25%.The high color fastness of slag-alkali decorative pigmented cements to the effects of ultraviolet radiation and steaming has been established. Color as a result of exposure to ultraviolet irradiation and thermal treatment has not changed. In addition to industrial mineral pigments, red mud, which is awaste product of alumina production, has been successfully used as a pigment.In the course of the work, the tendency of decorative slag-alkaline solutions to efflorescence was studied. The introduction of 0,25...0,5% sodium carboxymethylcellulose additive completely eliminates their appearance, improves the water-retaining capacity of solutions and their plasticity.

show abstract

Section: міцністьunclassified

Performance Characteristics of Slag-Alkali Decorative Cements and Mortar

Kryvenko¹,

Gots²,

Гелевера³

et al. 2022

БКТП

View full text Add to dashboard Cite

show abstract

“…Polypropylene dispersed reinforcement reduces the width of the crack opening in road pavements [18], changes the behavior of concrete destruction from brittle to ductile [19], and is resistant in an aggressive environment [15]. Polymer fiber also reduces the shrinkage of concrete pavements.…”

Section: Introductionmentioning

confidence: 99%

An Experimental Study on the Properties of Concrete and Fiber-Reinforced Concrete in Rigid Pavements

Kos,

Kroviakov,

Mishutin

et al. 2023

Materials

View full text Add to dashboard Cite

The complex effect of the amount of cement, polypropylene fiber (the fiber length was 39 mm, and the diameter was 0.45 mm), and polycarboxylate superplasticizer on concrete properties for rigid pavement was determined using the methods of experiment planning and experimental–statistical modeling. The fluidity of all the mixtures was S1. The W/C of the mixtures depended on the composition of the concrete and variable from 0.32 to 0.46. It was found that, by increasing the amount of superplasticizer from 1% to 1.8–2%, the compressive strength of concrete increased by 4.5–6 MPa after 3 days and by 7–9 MPa after 28 days. The flexural strength in this case increased by 0.6–0.9 MPa. The use of polypropylene fiber in the amount of 1.5–1.8 kg/m3 increased the compressive strength of concrete by an average of 3 MPa, increased the flexural strength by 0.5–0.6 MPa, reduced the abrasion capacity by 9–14%, and increased the frost resistance by up to 50 cycles. When using a rational amount of superplasticizer and fiber, the compressive strength of concrete, even with a minimum cement amount of 350 kg/m3, was at least 65 MPa, its flexural strength was at least 6 MPa, its frost resistance was F200, and its abrasion capacity was not more than 0.30 g/cm2. Concrete with such properties can be used for roadways of any type. Low abrasion capacity and high frost resistance provide the necessary durability of concrete for rigid pavement during operation.

show abstract

“…The surface of the chalk in aqueous dispersions has an excess negative charge, as evidenced by the small negative value ζ-potential, while the equipotential chalk point corresponds рН from 5 to 7 [5,17]. This is explained by the fact that the surface of the chalk according to [15,18,19] is covered with free silicic acid, so the mechanism of interaction of chalk with clinker minerals and products of their hydration is significantly different from the known mechanisms of interaction of other carbonate rocks.…”

Section: Introductionmentioning

confidence: 99%

Decorative Concrete with the Addition of Highly Dispersed Organogenic Calcite (Chalk) in the Landscape Architecture of the Modern City

Chepurna

Zhydkova

Popova

2020

KEM

View full text Add to dashboard Cite

One of the main components of urban design and landscape architecture that shapes and emphasizes the urban environment are small architectural forms. These elements of landscape architecture are used outdoors, so the material is influenced by a variety of atmospheric phenomena (temperature fluctuations, insolation, etc.). The results of the experiments showed that increased water resistance rates reduce the degree of exposure of the aggressive liquid medium, in particular sulfate and magnesium surface and groundwater, and frost resistance create conditions for the operation of these samples outdoors. The whiteness of the obtained results indicates that the obtained composition of concrete can be used as decorative with the addition of colored pigments.

show abstract

Research of impact resistance of nanomodified fiberreinforced concrete

Cited by 12 publications

References 8 publications

Performance Characteristics of Slag-Alkali Decorative Cements and Mortar

Performance Characteristics of Slag-Alkali Decorative Cements and Mortar

An Experimental Study on the Properties of Concrete and Fiber-Reinforced Concrete in Rigid Pavements

Decorative Concrete with the Addition of Highly Dispersed Organogenic Calcite (Chalk) in the Landscape Architecture of the Modern City

Contact Info

Product

Resources

About