Comparative Analysis of Standard Indicators for Nanocarbon Asphalt Concrete and Other Asphalt Concretes

Zhurinov, M.; Teltayev, Bagdat; Kalybai, A. A.; Rossi, Cesare Oliviero; Ye.D., Amirbayev

doi:10.32014/2020.2518-170x.92

Cited by 2 publications

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References 1 publication

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“…The results of our investigations have shown the possibility for the essential increase of the operational characteristics for road bitumens and asphalt concretes by their modification with carbon nanopowder [4][5][6][7][8][9][10] and polymers [11][12][13][14]. An asphalt concrete pavement with the improved operational characteristics will function efficiently only in case when layers of base and soil of subgrade are sufficiently strong.…”

Section: Complex Stabilization Of Soils and Base Course Materials During Construction And Repair Of The Highwaysmentioning

confidence: 99%

Complex Stabilization of Soils and Base Course Materials During Construction and Repair of the Highways

Teltayev¹,

Izmailova²,

Zherebitskiy³

2021

News of NAN RK. SGTS

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The article represents the results for investigation of a new technology of complex soil consolidation and stabilization and reuse of the material from stripping of the existing roads (cold recycling technology) with portlandcement and enzyme agent Roadzyme (USA), which allows reducing the energy costs significantly and improving ecological situation. Cold recycling has a number of significant advantages before other means of reconstruction. The absence of environmental pollution is due to the complete use of the material of the old pavement. There is no need in disposal sites, and the volume of the new delivered materials is the minimum one and reduces the area of contamination, which is certain during opening of new borrow-pits and rock quarries. Transportation is very small, therefore the consumption of the energy is considerably reduced, as well as devastating impact of vehicles on the road network. Effect of the use of the agent “Roadzyme” is based on the activation of physics and chemical processes, which increase the strength, water resistance and frost resistance of the consolidated soils and materials, reducing material consumption at provision of the required elasticity modulus for pavement structure due to reduction of the thickness for pavement layers, the use of local materials and saving of binders and inert materials. The decrease is noted for the stiffness of the materials, strengthened by complex method (binder with the agent “Roadzyme”), compared to the treatment only with the binder, which allows forecasting the increase of the crack resistance.

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Section: Complex Stabilization Of Soils and Base Course Materials During Construction And Repair Of The Highwaysmentioning

confidence: 99%

Complex Stabilization of Soils and Base Course Materials During Construction and Repair of the Highways

Teltayev¹,

Izmailova²,

Zherebitskiy³

2021

News of NAN RK. SGTS

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“…This paper is a continuation of the series of works of the authors devoted to the investigation and the comparative analysis of the characteristics of road bitumens and asphalt concretes [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. In this paper a comparative analysis of low temperature strength of conventional and modified asphalt concretes is carried out.…”

Section: Comparative Analysis Of Low Temperature Strength Of Modified Asphalt Concretesmentioning

confidence: 99%

Comparative Analysis of Low Temperature Strength of Modified Asphalt Concretes

Zhurinov¹,

Teltayev²,

Ye.D.³

et al. 2020

SERIES OF GEOLOGY AND TECHNICAL SCIENCES

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A comparative analysis has been performed in this work for low temperature strength of 31 types of the conventional (non-modified) and modified road asphalt concretes. The neat bitumens of the grades BND 70/100, BND 100/130 and BND 130/200 have been produced by the Pavlodar petrochemical plant from the crude oil of the Western Siberia (Russia) by the method of direct oxidation and they satisfy the requirements of the standard ST RK 1373-2013. The polymers Elvaloy 4170, Elvaloy AM, Kraton, Calprene 501, Butonal NS, SBS (L 30-01 A), KUMHO KTP and crumb rubber have been used for the modification of the bitumens. The modification of the bitumens has been performed in the laboratory of Kazakhstan Highway Research Institute. The modified bitumens satisfy the requirements of the standard ST RK 2534-2015. The conventional and modified asphalt concretes satisfy the requirements of the standards ST RK 1225-2019, ST RK 1223-2019, ST RK 2028-2010, ST RK 2373-2019 and GOST 31015-2002. The strength of the asphalt concretes at uniaxial direct tension at a constant strain rate of 1 mm/min at the temperatures of -10 °С, -20 °С and -30 °С determined in the device TRAVIS under the standard EN 2697-46 has been accepted as a characteristic of their low temperature strength. It is found out that various modifiers affect the asphalt concrete strength in different ways: a degree of impact depends both on a type of an asphalt concrete and a modifier, as well as on a negative temperature value. Some modifiers increase, and some of them decrease the strength of the asphalt concretes at low temperatures compared with the original asphalt concretes. Among the modifiers the polymer Elvaloy AM has been found to be the most efficient at low temperatures. The asphalt concretes of type B with the bitumens of grades BND БНД 100/130 and BND 130/200 at modification by the polymer Elvaloy AM had the biggest strength at all the considered low temperatures: at -10 ºC – 6.79 MPa and 6.43 MPa; at -20 ºC – 7.57 MPa and 7.87 MPa; at -30 ºC – 7.35 MPa and 8.86 MPa. The stone mastic asphalt concretes 15 and 20 with the polymers and without them at all the considered low temperatures practically had the strength not higher than the basic asphalt concretes of type B with neat (original) bitumens of grades BND 100/130 and BND 130/200.

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Comparative Analysis of Standard Indicators for Nanocarbon Asphalt Concrete and Other Asphalt Concretes

Cited by 2 publications

References 1 publication

Complex Stabilization of Soils and Base Course Materials During Construction and Repair of the Highways

Complex Stabilization of Soils and Base Course Materials During Construction and Repair of the Highways

Comparative Analysis of Low Temperature Strength of Modified Asphalt Concretes

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