scholarly journals Asphalt Concrete for Binder Courses with Different Jute Fibre Content

2021 ◽  
Vol 1203 (3) ◽  
pp. 032041
Author(s):  
Peter Gallo ◽  
Jan Valentin ◽  
Petr Mondschein
Keyword(s):  
Road Construction ◽  
Renewable Resource ◽  
Fibre Content ◽  
Modified Bitumen ◽  
Recycled Asphalt ◽  
Stiffness Modulus ◽  
Asphalt Mix ◽  
Indirect Tensile ◽  
By Products ◽  
Polymer Modified Bitumen

Abstract Since the beginning of modern road construction, there have been effort to make durable, long life pavements. But no one pavement can fulfil designed purpose forever. On the other hand, some natural resources are limited, so it is important to maximize use of renewable resources. In recent years, there is a visible pursuit of this trend, in road construction represented mostly by use of waste materials, such as industrial by-products or recycled asphalt pavement itself. Within the effort, fibrous additives were established on the market to prolong life of pavement layers. Some commercial ones are synthetic polymer based, so it does not go well with the renewable part of pavement life cycle if we want to secure sustainable future. This paper describes use of fibres from natural renewable resource, specifically jute plant (Corchorus). Three asphalt mix variants with jute fibres were designed and further compared. Fibre content was 0.1 %, 0.2 % and 0.3 % by weight. Several tests were conducted to examine the effect of fibres on mixture properties, with aim on stiffness modulus (IT-CY) and crack propagation (SCB). Furthermore, indirect tensile strength ratio was calculated as a parameter showing performance of the mixture under the wet conditions. Control mixtures with paving grade and polymer modified bitumen were tested for better comparison and evaluation of the results.

scholarly journals Performance of asphalt mixtures with a new type of rubber modified bitumen

2021 ◽  
Vol 19 (1) ◽  
pp. 31-54
Author(s):  
Kornel Almássy ◽  
András Geiger ◽  
András Holló ◽  
László Gáspár
Keyword(s):  
Construction Projects ◽  
Road Construction ◽  
Structure Design ◽  
Asphalt Mixtures ◽  
Modified Bitumen ◽  
The Road ◽  
Waste Tyres ◽  
Asphalt Mix ◽  
New Type ◽  
Polymer Modified Bitumen

The rubber modified bitumen 45/80-55 (RMB 45/80-55) product has been used in Hungary as bituminous binder for asphalt mix production since 2013. It is a new kind of rubber bitumen manufactured using patented technology. Over the past 8 years, it has been used to construct or renovate more than 100 asphalt road sections. Originally RMB 45/80-55 was used to replace paving grade bitumen 50/70 in some road construction projects. However, asphalt laboratory results and road construction experience showed that its quality can also achieve or in terms of some parameters exceed that of asphalt mixtures manufactured with polymer modified bitumen 25/55-65 (PMB 25/55-65). Primarily, its excellent resistance to low temperatures and fatigue are outstanding, in this respect; it surpasses the results of asphalts made with polymer modified bitumen. Its favourable fatigue resistance compensates for its lower stiffness; therefore, favourable results were obtained in the case of track structure design too in comparison with PMB. Considering the road construction benefits of this new type of rubber bitumen, as well as the support of the environmentally friendly recovery of waste tyres and fitting into a circular economy, a wider spread of the RMB product is realistically expected in the future.

scholarly journals USE OF COAL COKING BY-PRODUCTS FOR THE PRODUCTION OF POLYMER MODIFIED BITUMEN

2019 ◽  
Vol 2 (2) ◽  
pp. 97-101
Author(s):  
Y. V. Prysiazhnyi ◽  
◽  
M. Ye. Shved ◽  
O. T. Astakhova ◽  
D. R. Dmytrenko ◽  
...  
Keyword(s):  
Modified Bitumen ◽  
By Products ◽  
Polymer Modified Bitumen

scholarly journals Study of the Stiffness of the Bitumen Emulsion Based Cold Recycling Mixes for Road Base Courses

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5473
Author(s):  
Katarzyna Konieczna ◽  
Piotr Pokorski ◽  
Wojciech Sorociak ◽  
Piotr Radziszewski ◽  
Dawid Żymełka ◽  
...  
Keyword(s):  
Road Construction ◽  
Reclaimed Asphalt Pavement ◽  
Stiffness Modulus ◽  
Pavement Rehabilitation ◽  
Reclaimed Asphalt ◽  
Bitumen Emulsion ◽  
Potential Benefits ◽  
Indirect Tensile ◽  
Reduction Of Energy Consumption ◽  
Cold Recycling

The benefits of the use of cold recycling mixtures (CRMs) in pavement rehabilitation are associated with both the reduction of natural resource consumption by replacing them with recycled materials and the reduction of energy consumption during their production and paving. The evolution of the stiffness of CRMs in road construction and the fatigue life of pavements with CRM base layers are still being investigated. In this paper, CRMs with 1% cement content, called bitumen-stabilized materials with bitumen emulsion (BSM-Es), were examined. Mixtures that were differentiated in terms of Reclaimed Asphalt Pavement (RAP) content, as well as the amount and type of bitumen emulsions, were subjected to indirect tensile stiffness modulus (ITSM) tests at 5 °C, 13 °C, and 20 °C. The thermal sensitivities of the BSM-E mixtures were analyzed. BSM-E mixture stiffness modulus levels at various temperatures were determined using a statistical approach. On the basis of the results obtained, a discussion on the mechanistic-empirical design of flexible pavements with BSM-E base layers is presented. The potential benefits of using BSM-E materials in road construction in certain aspects of pavement life are indicated.

scholarly journals LABORATORY STUDY OF ASPHALT STARBIT E-55 POLYMER MODIFIED APPLICATION ON ASPHALT CONCRETE WEARING COURSE (AC-WC) IN TERMS OF DURABILITY AND INDIRECT TENSILE STRENGTH

2015 ◽  
Vol 1 (3) ◽  
pp. 101
Author(s):  
Damianus Kans Pangaraya
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Performance Test ◽  
Optimum Level ◽  
Modified Bitumen ◽  
Vehicle Load ◽  
Asphalt Road ◽  
Indirect Tensile ◽  
Test Result ◽  
Polymer Modified Bitumen

The conventional asphalt road has almost been considered fail to serve the transportation needs. It is indicated by the occurrence of premature damage which is caused by vehicle load and climate. Starbit E-55, the polymer modified bitumen, is formulated to meet the requirement of transport development. Considering those needs, it is important to investigate the feasibility level of that modified bitumen as alternate asphalt instead of the conventional one. This research began with the measurement of the properties of hard layered AC-WC Starbit E-55, then comparing the result to 60/70 penetration of Pertamina asphalt. The next step is then, to determine the converted value so as to be close to that of Pertamina (60/70 penetration). This step is conducted by applying durability and ITS tests on the mixture. Result of the tests showed that hard layered AC-WC Starbit E-55 has better characteristic at 5.7% optimum level asphalt and 6.4% of Pertamina asphalt (60/70 penetration). Starbit E-55 converted level within hard-layered ACWC is 5.6%. The performance test result on immersion with variance of 1, 3, 5, 7 and 14 days shows that durability value of Starbit E-55 AC-WC has better performance. During the process, Starbit E-55 required 15.38% higher energy consumption.

scholarly journals Saving Energy in the Transportation Sector: An Analysis of Modified Bitumen Application Based on Marshall Test

Energies ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 3025 ◽  
Author(s):  
Syyed Raheel Shah ◽  
Hunain Arshad ◽  
Ahsan Waqar ◽  
Muhammad Saeed ◽  
Salman Hafeez ◽  
...  
Keyword(s):  
Construction Industry ◽  
Road Construction ◽  
Modified Bitumen ◽  
The Road ◽  
Process Modification ◽  
Transportation Sector ◽  
Marshall Test ◽  
Asphalt Mix ◽  
Save Energy ◽  
Major Factors

Energy consumption and material production are two major factors associated with the road construction industry. Worldwide, millions of tons of hot mix asphalt production consume a huge amount of fuel as an energy source in terms of quantity and cost to achieve the standard temperature of up to 170 °C during the mixing process. Modification of bitumen can not only reduce its usage but also the consumption of energy (fuel) during the asphalt mix production process at low temperatures. This study provides a method to save energy by proposing the addition of bitumen modifier in the road construction sector. Furthermore, to make it compatible with the field conditions for road construction, stability analysis is executed on the prepared samples by partially replacing the bitumen with polyurethane foam (PUF) and plastic waste (PW) (at 10%, 20%, 30%, 40%, and 50%). Experimental results demonstrate a reasonable saving in the amount of energy (33%) and material (40% bitumen) used and showed that similar strength of developed asphalt mix can be achieved using PUF. An extensive calculation concludes that these savings could make a huge difference in construction economics of mega road infrastructure projects, especially during an energy crisis.

scholarly journals EFFECTS OF GRAPHITE ON MECHANICAL PROPERTIES OF STONE MASTIC ASPHALT PAVEMENT

2017 ◽  
Vol 23 (8) ◽  
pp. 1013-1020 ◽  
Author(s):  
Baha Vural KÖK ◽  
Mehmet YILMAZ ◽  
Yunus ERKUS
Keyword(s):  
Mechanical Properties ◽  
Fatigue Tests ◽  
Modified Bitumen ◽  
Stiffness Modulus ◽  
Bituminous Mixtures ◽  
Mastic Asphalt ◽  
Significant Difference ◽  
Stone Mastic Asphalt ◽  
Indirect Tensile ◽  
Marshall Stability

Hot mix asphalt needs to be developed to resist particular permanent deformations like rutting and thermal cracking due to increased traffic volumes and vehicle loads. Additives such as carbon black, graphite, carbon fibers are used in the mixture or the binder for improving the mechanical features of asphalt. In this article, the effects of graphite used for developing the mechanical properties of asphalt have been investigated in mixtures tests. Therefore, Marshall stability, indirect tensile stiffness modulus and indirect tensile fatigue tests were performed to bituminous mixtures modified with three different proportions of graphite by weight of bitumen. Stone mastic asphalt mixtures which were manufactured with pure and modified bitumen were aged in different time intervals in the oven. In conclusion, it has defined that Marshall stability values have declined. It has been determined that there is no significant difference in the time-dependent deformation behavior of the original and aged samples in pure and different graphite content although the stiffness modulus and load repeat number of the samples increased with the rise of the aging time. These results shown that graphite generally used for improving the thermal properties in literature were also determined to contribute to mechanical properties of mixtures.

scholarly journals Analysis of stiffness and fatigue resistance of cold recycled asphalt mixtures manufactured with foamed bitumen for their application to airfield pavement design

2017 ◽  
Vol 7 (080) ◽  
pp. 127 ◽  
Author(s):  
H. I. Lacalle-Jiménez ◽  
J. P. Edwards ◽  
N. H. Thom
Keyword(s):  
Fatigue Tests ◽  
Pavement Design ◽  
Raw Material ◽  
Control Mode ◽  
Recycled Asphalt ◽  
Stiffness Modulus ◽  
Reclaimed Asphalt ◽  
Tensile Fatigue ◽  
Indirect Tensile ◽  
Foamed Bitumen

Cold recycled bound materials (CRBMs) provide an economic and environmental advantage for pavements since they decrease energy and raw material consumption. However, design methods for airfield pavements do not include key CRBM properties. In this paper an empirical-mechanistic method is used to study airfield pavement design with CRBM in order to develop design guidance. The aim of the paper is to obtain the inputs related to material properties needed for use in this method. For this purpose, CRBM containing reclaimed asphalt, with fly ash, cement and foamed bitumen as stabilising agents, was characterised. The methodology included indirect tensile stiffness modulus (ITSM) and indirect tensile fatigue tests (ITFT) in strain control mode. The inputs needed for a pavement design analysis with CRBM were then obtained. The results showed the importance of further study on CRBM fatigue to understand the behaviour of these mixes under cyclic loading.

scholarly journals LABORATORY INVESTIGATION INTO THE EFFECTS OF FIBERS ON BITUMINOUS MIXTURES

2014 ◽  
Vol 21 (1) ◽  
pp. 45-53 ◽  
Author(s):  
Emanuele Toraldo ◽  
Edoardo Mariani ◽  
Sara Malvicini
Keyword(s):  
Mechanical Performance ◽  
Road Construction ◽  
Modified Bitumen ◽  
Research Project ◽  
Bituminous Mixtures ◽  
Different Types ◽  
Road Materials ◽  
Compaction Properties ◽  
Polymer Modified Bitumen ◽  
Bitumen Modification

The growing need for high quality bituminous mixtures in road construction, rehabilitation and maintenance is currently satisfied by means of techniques to produce polymer-modified bitumen, or by the addition of additives to mixtures during in-plant mixing operations. A rigorous rheological approach in the study of the bitumen modification process enables researchers to rationally compare different modifying agents and to evaluate their relative efficiency for specific field applications. As far as additives are concerned, the binder is not the only element involved in the evaluation; both binding mastics and bituminous mixtures must be evaluated to get a complete understanding of the characteristics. Moreover, the advantages that may stem from the use of fibers should be carefully taken into consideration since they may offer alternative strategies for the enhancement of bituminous mixtures. As a result of these observations, the authors have devised an experimental research project focused on the analysis of the effects of different types and dosages of cellulose-based fibers on the main performance-related properties of bituminous road materials: compaction properties, volumetric characteristics and mechanical performance. This paper provides an overview of the results obtained and some details of the specific protocols followed during the research project.

scholarly journals INCREASING PERFORMANCE OF ROAD LAYERS FROM POROUS ASPHALT

2020 ◽  
pp. 71-83
Author(s):  
E. V. Uglova ◽  
N. I. Shiryaev
Keyword(s):  
Service Life ◽  
Reaction Rate ◽  
Water Resistance ◽  
Mathematical Planning ◽  
Modified Bitumen ◽  
Porous Asphalt ◽  
Asphalt Mix ◽  
Polymer Modified Bitumen ◽  
Three Factor

Statement of the problem. Studies of the degree of influence of the content of polymer-modified bitumen, adhesive additives and mineral materials of various rocks on the physic-mechanical and operational properties of draining asphalt have been conducted. Results. The results of the mathematical planning of a three-factor experiment are presented in the process of studying the operational properties of porous asphalt. Conclusions. The composition of the draining asphalt mix on mineral materials of various types and types of rocks and polymer-modified bitumen PMB 50/70 with an adhesive additive that provides an increase in the abrasion service life, reaction rate and water resistance has been developed and justified.

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