scholarly journals A METHOD FOR MODIFYING MMA MIX WITH RUBBER FINES USED IN ASPHALT CONCRETE MIX PLANTS

2021 ◽  
Vol 177 (27) ◽  
pp. 13-17
Author(s):  
Karolina Bednarczyk ◽  
◽  
Paweł Rajczyk ◽  
ICSDEMS 2019 ◽  
2020 ◽  
pp. 83-93
Author(s):  
Amalia Firdaus Mawardi ◽  
Machsus Machsus ◽  
Rachmad Basuki ◽  
Mohamad Khoiri ◽  
Sukobar ◽  
...  

2019 ◽  
Vol 6 (3) ◽  
Author(s):  
Kabanov Aleksandr ◽  
Irina Kolos ◽  
Viktoriya Chernyaeva ◽  
Aleksey Ilin ◽  
Olga Medvedeva ◽  
...  

This article discusses the problems that arise in the operation of road structures. One of the most important is rutting. Indicators of resistance to rutting depend on the method of design of non-rigid pavement and operational parameters, which allows to obtain the applied method of volumetric design of asphalt mix «Superpave» (SP-19), which in our country was called «SPAS». The authors, together with the staff of the laboratory of asphalt Concrete plant – 1, monitored asphalt concrete mixtures designed according to the «Superpave» system on the asphalt mixing plant. Then tests were carried out according to the method of PNST 181-2016 on the susceptibility of asphalt concrete materials to shear deformations arising under the action of repeated passes of the loaded wheel at ambient temperature. The result of the study of rutting showed that the mixture SP-19 have predominantly traditional. More detailed research results are presented in this article. Based on the data obtained from the results, conclusions were formulated: the Studies show that the method of «Superpeyv» is updated to the requirements of technical supervision at the objects of the road complex of the Russian Federation. In conclusion, the authors have formulated conclusions on the research: a comparison of physical and mechanical performance of asphalt concrete mix SP-19 on PNST 114 and fine-grained asphalt concrete mix type A brand I shows that the shear stability in terms of the average depth of the track is higher for the brand SP-19 by 38 %; set the required mixing temperature and compaction of asphalt concrete mixture on the system «Superpeyv»; the release of a pilot batch of asphalt concrete mix of SP-19 brand at the production site of JSC «ABZ-1» showed that the recipe selected in the laboratory is reproduced in the ABZ; cores selected within the framework of technical supervision from the experimental coating and tested in the laboratory showed corresponding to the requirements of ODM 218.4.038-2017; assessment of economic efficiency at the cost of asphalt concrete mix of SP-19 brand showed a decrease of 2.2 % relative to the cost of fine-grained asphalt concrete mix; the increase in the service life of the road surface h 30–50 % by reducing rutting increases its turnaround time. At the same time, economic efficiency can reach 50 % per m2.


2021 ◽  
Vol 7 (10) ◽  
pp. 1741-1752
Author(s):  
Yasir N. Kadhim ◽  
Wail Asim Mohammad Hussain ◽  
Abdulrasool Thamer Abdulrasool

For the sake of enhancing the mechanical properties and durability of asphalt concrete, many studies suggest adding different admixtures, such as waste materials in the form of filler. These admixtures have a significant influence on the performance of asphalt concrete by plying a roll in filling the voids between particles and sometimes as a cementitious material. This study aims to improve the strength of asphalt concrete by adding crushed animal bone to the mix after carbonization at a temperature of 800 Co. Seven different percentages (10, 20, 30, 40, 50, 60, and 100%) of animal bone ash as a replacement for the filler percentage were added to the optimum asphalt concrete mix. A number of tests were conducted on asphalt concrete specimens to measure Marshall stability (MS), Marshall flow value (MF), voids filled with asphalt percentages (VFA), air void percentages (VA), voids in mineral aggregate percentages (VMA), and maximum theoretical specific gravity (GMM). From the results, the maximum stability of 14.85 KN was reached when using animal bone ash of 20% as a partial replacement for the conventionally used filler (limestone). In general, there are some improvements in the physical properties of asphalt concrete with animal bone ash, which can be related to the increase in the bond between the particles of aggregates and the bitumen material. Doi: 10.28991/cej-2021-03091757 Full Text: PDF


2018 ◽  
Vol 1 (2) ◽  
Author(s):  
Candra Yulianto ◽  
Yosef Cahyo ◽  
Ahmad Ridwan

ABSTRACTIn the construction of highways, the community generally uses concrete asphalt as aningredient in the construction of highways. Asphalt concrete mix (Hotmix) use in Indonesiafrom year to year is increasing. Because concrete asphalt (Hotmix) has advantages comparedto other materials, for example, the price is relatively economical / cheap compared to usingconcrete, its ability to support heavy loads of high vehicles. the practicality of making asphaltconcrete (hotmix) can be made from locally available materials and has good resistance toweather changes. The purpose of this research is how the effect of adding lime extinguishedon mixed materials on asphalt concrete (hotmix) and knowing how much percentage of lime2mixture goes out to reach the optimum point of concrete asphalt from the author's calculationresults can be concluded as follows:1. The value of stability of each decrease by adding lime is 5% at 778 kg, 10% at 645 kg,15% at 534 kg.2. The results of the volume of air cavity to mixture (VIM) with levels of 5%, 10% and 15%,namely 8.17%, 7.51%, and 6.85%.3. Pore volume results between aggregate grains (VMA) with levels of 5%, 10% and 15%,among others, 19.87%, 18.55%, and 17.73%.4. Pore volume results between aggregate grains filled with asphalt (VFB) with levels of 5%,10% and 15%, among others 58.88%, 56.61%, and 54.35%.5. The results of the Marshall Quotient (MQ) value of 5%, 10% and 15% Marshall Quotient(MQ) are 297 kg / mm, 230 kg / mm, and 198 kg / mm.Keywords: Concrete Asphalt, Addition of lime extinguished, Marshall test characteristics


2021 ◽  
Vol 2021 ◽  
pp. 117-128
Author(s):  
Artur Onyshchenko ◽  
◽  
Mykola Garkusha ◽  
Oleksandr Fedorenko ◽  
Yevgen Plazii ◽  
...  

Introduction. Increasing the load on highways and constantly increasing the intensity of traffic requires the use of road construction materials with improved physical and mechanical properties. Asphalt concrete is one of the most common and effective materials, which allows to provide the necessary strength and durability of the pavement structure. However, the use of traditional materials for its preparation - mineral material and road bitumen has a limited resource, which does not always meet traffic conditions. Modern scientific research in materials science allows to use mixtures of asphalt concrete and asphalt concrete road with the use of basalt fiber.Apply mixtures of asphalt concrete and asphalt concrete road with the use of basalt fiber, allows to increase the mechanical characteristics - tensile strength and resistance to fatigue from repeated loads, which increases the crack resistance of asphalt concrete layers of pavement structures, as well as increases resistance to shape change. accumulation of residual deformations.Problem Statement. From the literature analysis it is established that the coating of non-rigid pavement is in difficult operating conditions, which is confirmed by the intensive growth of defects in the form of tracks, landslides, inflows, cracks, due to increasing parameters of transport loads and high summer temperatures, so there is a need new materials.Purpose. Is to study the impact of the effectiveness of asphalt concrete reinforced with basalt fiber.Results. The results of physical and mechanical properties of asphalt concretes with the use of basalt fiber are obtained. The results of formation of residual deformations in the form of track in asphalt concrete with the use of basalt fiber are obtained. As a result of the conducted researches the analysis of efficiency of application of basalt fiber in asphalt concrete mix is executed.On the basis of the carried-out researches the basic requirements to asphalt concrete mix with use of basalt fiber are establishedConclusions. The research results were used in the development of regulations for the design, construction and repair of asphalt layers of roads in Ukraine.Keywords: asphalt concrete road with basalt fiber, asphalt concrete mixes with basalt fiber, loading, covering, stability, temperature.


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