scholarly journals Influence of the porosity structure of road concrete on its durability

2021 ◽  
Vol 274 ◽  
pp. 04009
Author(s):  
Denis Smirnov ◽  
Sergey Stepanov ◽  
Ruslan Garipov ◽  
Timur Garayev ◽  
Tagir Sungatullin
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Frost Resistance ◽  
Pore Space ◽  
Concrete Pavements ◽  
Cement Concrete ◽  
Technical Parameters ◽  
Porosity Structure ◽  
Flexural Tensile Strength ◽  
Design Service Life

Cement-concrete pavements of roads and airfields are the most durable type of pavement. The design service life of cement-concrete pavements is 40-50 years, in Russia this period is 20-25 years, and for asphalt-concrete pavements is 10-15 years. The real, actual overhaul period of asphalt concrete pavements, is much lower than the design one (according to the Federal Road Agency of Russia «Rosavtodor», on average, 3-5 years or even less), therefore, work aimed at increasing the durability of cementconcrete pavements is of particular relevance. The main technical parameters of road concrete that characterize its durability are compressive strength, flexural tensile strength, water absorption and others. The most important parameter is the frost resistance of concrete, which is primarily influenced by the structure of the pore space. This paper shows the way of obtaining concretes based on aggregates, the frost resistance of which is lower than the frost resistance of the resulting concrete.

Covering and Reinforcement Key Technologies of Airport Old Cement Concrete Pavement

2012 ◽  
Vol 193-194 ◽  
pp. 843-846
Author(s):  
Bao Hua Shi ◽  
Wen Pu Ning ◽  
Han Wei Wang ◽  
Tao Sun
Keyword(s):  
Life Span ◽  
Asphalt Concrete ◽  
Concrete Pavement ◽  
Main Task ◽  
Concrete Pavements ◽  
Cement Concrete ◽  
Treatment Methods ◽  
Key Technologies ◽  
Cement Concrete Pavement

Cement concrete pavements were used in most airports built early in China. Nowadays the main task of airports is how to cover and reinforce damaged pavements. To ensure the life-span of pavement after covering, on the basis of analyzing the treatment methods of original cement concrete pavement, cement and asphalt concrete were used to realize the covering and reinforcement of old cement concrete pavement, and key technologies of Preventing reflective cracks of concrete pavement were put forward, which had a good result in practice

scholarly journals Comparison of pavement surface roughness characteristics of different wearing courses evaluated using 3D scanning and pendulum

2020 ◽  
Vol 313 ◽  
pp. 00013
Author(s):  
Matej Brna ◽  
Michal Cingel
Keyword(s):  
Asphalt Concrete ◽  
Point Of View ◽  
Skid Resistance ◽  
Concrete Pavements ◽  
Cement Concrete ◽  
Physical Point ◽  
Pavement Surface ◽  
Road Pavement ◽  
Pavement Roughness ◽  
Surface Irregularities

Road pavement roughness, in terms of skid resistance, can be described from a geometrical point of view as a texture or from a physical point of view as friction between a tire and a road surface. The paper deals with the comparison of asphalt and concrete pavement surface on selected newly built sections of the D1 motorway near the Ovčiarsko tunnel. Texture measurements were performed with a Static Road Scanner (SRS) capable of recording surface irregularities up to the microtexture level (2.49 µm resolution). A pendulum was used to determine the friction. Subsequently, the texture was evaluated using individual amplitude and wavelength characteristics and the friction was evaluated using the PTV parameter. Finally, correlations were searched between the roughness characteristics of asphalt concrete and cement concrete pavements, but also between texture and friction characteristics.

Implementation Feasibility of Asphalt Concrete–Overlaid Portland Cement Concrete Pavement Rehabilitation Guidelines

1997 ◽  
Vol 1568 (1) ◽  
pp. 155-164
Author(s):  
Kathleen T. Hall ◽  
Amy Schutzbach
Keyword(s):  
Portland Cement ◽  
Asphalt Concrete ◽  
Concrete Pavements ◽  
Remaining Life ◽  
Portland Cement Concrete ◽  
Cement Concrete ◽  
Pavement Rehabilitation ◽  
Cement Concrete Pavement ◽  
Rehabilitation Strategy ◽  
Selection Of

Illinois Highway Research Study IHR-532 was conducted to develop project-level guidelines for evaluation, rehabilitation selection, and rehabilitation design for existing asphalt concrete–overlaid portland cement concrete (AC/PCC) pavements in Illinois. Use of these guidelines depends on data that are not normally available for network-level analysis. A study was conducted to assess the feasibility of implementing these guidelines in network-level decision making and to assess the effects that implementing these guidelines for selection of rehabilitation methods for existing asphalt-overlaid concrete pavements would have on the overall rehabilitation budget requirements for a district network of Interstate pavements, the overall network condition, and pavement network remaining life. These objectives were met by comparing the IHR-532 rehabilitation strategy (which identifies one or more rehabilitation options) with the Illinois Department of Transportation’s current rehabilitation policy, which is an AC overlay thickness of 83 mm (3.25 in.). This feasibility analysis indicated that the selection of the preferred rehabilitation strategy was strongly related to the type and condition of the existing pavement. It also indicated that the IHR-532 rehabilitation strategy and the single rehabilitation strategy yielded similar networkwide results when compared on the basis of average condition at the end of the analysis period. However, the IHR-532 rehabilitation strategy indicated greater benefit than the single rehabilitation strategy, at any budget level, when compared on the basis of network average remaining life at the end of the analysis period.

scholarly journals The Effect of Using Sustainable Materials on the Performance-Related Properties of Asphalt Concrete Mixture

2019 ◽  
Vol 5 (12) ◽  
pp. 2727-2737
Author(s):  
Amjad H. Albayati ◽  
Waleed Arrak Turkey
Keyword(s):  
Tensile Strength ◽  
Fatigue Life ◽  
Asphalt Concrete ◽  
Asphalt Mixture ◽  
Concrete Pavements ◽  
Strength Ratio ◽  
Damage Resistance ◽  
Reclaimed Asphalt ◽  
Production Temperature ◽  
Materials Used

Sustainability is very important in this world at this time. One of the best materials used for sustainability in asphalt concrete pavements is the warm mix asphalt (WMA) as well as the reclaimed asphalt pavement (RAP). WMA technology has the ability to reduce production temperature to reduce the fuel usage and emissions. RAP is the old concrete asphalt mixture that is out of service and using it again leads to preservation of the virgin material. This search studied the viability of using WMA with different percentages of RAP (10%, 30%, and 50%) and compared them with control hot mix asphalt (HMA) and WMA. The Marshall properties, Tensile strength ratio (TSR), rut depth and fatigue life were determined in this work. The results showed that the tensile strength ratio (TSR) for HMA was better than that for WMA by 6%, rut depth for HMA was (4.37 mm) lower than that for WMA was (6.5mm), better fatigue life was obtained for WMA was (700 cycle) as compared to HMA was (500 cycle). In case of WMA with RAP (WMA-RAP), when the percentage of RAP increased with WMA, the moisture damage resistance improved by 2.5%, 13.3% and 15.4% for G1, G3 and G5 respectively, also the rutting resistance improved by 34.6%, 48% and 62.3% for G1, G3 and G5 respectively, but deteriorated of fatigue life by 45.8%, 74% and 88.5% for G1, G3 and G5 respectively.

scholarly journals The effect of the aggregate type on the properties of pavement concrete

2018 ◽  
Vol 67 (4) ◽  
pp. 83-94
Author(s):  
Grzegorz Rogojsz ◽  
Damian Skupski ◽  
Bartosz Januszewski
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Modulus Of Elasticity ◽  
Frost Resistance ◽  
Laboratory Tests ◽  
Indirect Tensile Strength ◽  
Cement Concrete ◽  
Pore Characteristics ◽  
Road Surfaces ◽  
Indirect Tensile

This paper presents the results of laboratory tests on the properties of cement concrete containing various types of aggregate. The purpose of the tests was to determine the effect of aggregate on compressive strength, indirect tensile strength, air pore characteristics, frost resistance and the modulus of elasticity of concrete for road surfaces. The aggregate that meets the requirements for road concrete was determined on the basis of the tests. Keywords: road concrete, frost resistance of aggregate, frost resistance of road concrete.

scholarly journals Ensuring the reliability of pavements in the repair and reconstruction of existing cement-concrete pavements destroyed by vibroresonance on a weak basis

2021 ◽  
Vol 2 (92) ◽  
pp. 17
Author(s):  
Ihor Gameliak ◽  
Vitalii Raikovskyi
Keyword(s):  
Asphalt Concrete ◽  
Modulus Of Elasticity ◽  
Stress Relief ◽  
Concrete Pavements ◽  
Weak Base ◽  
Cement Concrete ◽  
Weak Basis ◽  
Minimum Number ◽  
Modulus Of Deformation ◽  
Number Of Passes

Abstract. Repair and reconstruction of existing ce-ment-concrete pavements of hard pavements should be performed based on the results of the assessment of the condition of the pavement, assessment of their suitability as a basis for new layers and especially when reinforced with asphalt concrete layers. The article presents a method of determining the actual total modulus of elasticity of pavement, using static and dynamic stamping equipment and evaluating the results of measuring the modulus of deformation and elasticity of the concrete base at different passes of the vibrating cavity to decide on the method of re-pair. It is concluded that with a weak base, the vibroresonance method is unsuitable and stress relief should be used with a minimum number of passes of destructive equipment.

scholarly journals MULTI-CRITERIA OPTIMIZATION OF THE FIBER CONCRETES COMPOSITIONS OF RIGID PAVEMENT

2021 ◽  
Vol 3 (1) ◽  
pp. 62-71
Author(s):  
S. Kroviakov ◽  
◽  
A. Mishutin ◽  
L. Chintea ◽  
◽  
...  
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Statistical Models ◽  
Frost Resistance ◽  
Polypropylene Fiber ◽  
Optimization Method ◽  
Operating Conditions ◽  
Rigid Pavement ◽  
Flexural Tensile Strength ◽  
Fiber Concrete

The experiment was carried out according to the optimal plan, which four factors of the composition of modified fiber concrete for rigid pavement were varied: amount of Portland cement, polypropylene fiber, metakaolin and polycarboxylate type additive. All concrete mixtures had equal mobility P2. Complex of experimental-statistical models describe the influence of factors on the properties of concrete is obtained. Selection of optimal compositions of fiber concrete of a rigid pavement was carried out using the obtained experimental-statistical models. Graphical optimization method for "squares and squares" diagrams was used. The square in the coordinates "amount of metakaolin" - "amount of complex action additive Coral ExpertSuid-5" was used as a carrier in the construction of diagrams. These values of the mechanical characteristics of concrete were used as limitation criteria: compressive strength at the age of 3 and 28 days, flexural tensile strength, frost-resistance, abrasion. Frost-resistance and abrasion are the main indicators that ensure the durability of concrete for rigid pavement in typical operating conditions. The concrete prime cost indicator was used as an optimization criterion. 2 variants of concretes compositions of classes C30/35 and C32/40 with increased durability and high strength was chosen. The selected compositions of C30/35 class concretes have frost-resistance F350, flexural tensile strength 8.0-8.2 MPa, abrasion 0.38-0.39 g/cm2, compressive strength at 3 days age 35 MPa and strength at 28 days age 54 MPa. The selected compositions of C32/40 class concretes have frost-resistance F400, flexural tensile strength 8.5-8.6 MPa, abrasion 0.34 g/cm2, compressive strength at 3 days age 38-39 MPa and strength at 28 days age 57-58 MPa. All four selected compositions have the amount of metakaolin 15-20 kg/m3, polypropylene fiber 0.9-1.5 kg/m3, polycarboxylate type additive Coral ExpertSuid-5 0.8-0.9% of the cement mass.

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