scholarly journals Large stone asphalt mixture as a rehabilitation strategy for heavy traffic highways.

2018 ◽  
Author(s):  
Zila Maria Garcia Mascarenhas
Keyword(s):  
Heavy Traffic ◽  
Asphalt Mixture ◽  
Large Stone ◽  
Rehabilitation Strategy

Case Study of a Composite Layer with Large-Stone Asphalt Mixture for Heavy-Traffic Highways

2020 ◽  
Vol 146 (1) ◽  
pp. 04019040 ◽  
Author(s):  
Zila M. G. Mascarenhas ◽  
Matheus S. Gaspar ◽  
Kamilla L. Vasconcelos ◽  
Liedi L. B. Bernucci ◽  
Amit Bhasin
Keyword(s):  
Heavy Traffic ◽  
Asphalt Mixture ◽  
Composite Layer ◽  
Large Stone

Coupled Numerical Analysis of Anti-crack Mechanism of Large Stone Asphalt Mixture

2010 ◽  
Vol 4 (2) ◽  
pp. 22-26
Author(s):  
Qingchang Lu ◽  
Jianmin Zi ◽  
Haijun Wang ◽  
Qiuxi Huang ◽  
Wei Wan
Keyword(s):  
Numerical Analysis ◽  
Asphalt Mixture ◽  
Large Stone

scholarly journals BAHAN TAMBAH SERAT ECENG GONDOK PADA LASTON TIPE XI TERHADAP INDEKS MARSHALL TEST MENGGUNAKAN KERIKIL MANTUP

UKaRsT ◽  
2018 ◽  
Vol 2 (2) ◽  
pp. 8
Author(s):  
Sugeng Dwi Hartantyo ◽  
Rasiyo Hepiyanto
Keyword(s):  
Asphalt Concrete ◽  
Water Hyacinth ◽  
Heavy Traffic ◽  
Asphalt Mixture ◽  
Cellulose Fiber ◽  
Fine Aggregate ◽  
Traffic Loads ◽  
Marshall Test ◽  
Technical Specifications

Laston is a mixture of coarse aggregate, fine aggregate, and filler with a binder under the temperature of 145-155oC with the composition being studied and regulated by technical specifications. Laston is also known as AC (Asphalt Concrete).Laston itself is commonly used in Indonesia with continuous gradations used for heavy traffic loads. To get the addictive material is not easy and the material is expensive. Therefore, it is necessary to find alternatives to the cellulose fiber. Water hyacinth is a water weed that once grow and develop, it has high cellulose fiber content, which is about 60%.For that, done a research to add a hot asphalt mixture material that aims to improve the quality of mixed result. The selected material is natural water hyacinth. The method used is trial and error with reference of SNI 03-1737-1989. Variations used are 3%, 5%, and 7% of the asphalt weight, asphalt level used Is 5.61%.The result of this study is Marshall evaluation where the greatest score obtained for stability is 1325 kg,  Flow is 3.73 mm, Quotient Marshall is 401.02 kg/mm, VMA is 66.30%, VFWA is 19.25%, and VIM score is 54.35 %. With this result, the asphalt mixture can not be used because the results of VMA, VFWA, and VIM have not been suitable on specification of SNI 03-1737-1989.  Keywords: Laston, Asphalt Concrete, Water Hyacinth, SNI 03-1737-1989.

scholarly journals PENGARUH PENAMBAHAN LIMBAH KARET BAN LUAR PADA LAPIS TIPIS ASPAL PASIR (LATASIR) TERHADAP KARAKTERISTIK MARSHALL

2018 ◽  
Vol 2 (2) ◽  
pp. 54
Author(s):  
Fakhrul Rozi Yamali
Keyword(s):  
Coarse Aggregate ◽  
Heavy Traffic ◽  
Asphalt Mixture ◽  
Fine Aggregate ◽  
A Value ◽  
Waste Rubber ◽  
Marshall Test ◽  
Local Roads ◽  
Technical Specifications

The mixture of asphalt sand or often called as LATASIR (a thin Layer of asphalt Sand) is often used on the streets as light as local roads or road environment, in order to restrain the rate of water so as not to enter into pores in it. This mixture consists only of fine aggregate or sand or a mixture of both, so of coarse aggregate is not found in its alloy, so have the resilience of the Groove (rutting) are low and cannot be used on roads with heavy traffic or the area slopes. To improve the quality of asphalt mixture Latasir then do the addition of waste tire rubber out of the motor. This research was conducted with the marshall test asphalt plan levels, with 7%, 8%, 9%, 10% and 11% in advance. After obtained the value levels of Optimum Asphalt (KAO), then do the test with the addition of marshall rubber tyres outside the motor of 1%, 2%, 3%, 4% and 5% against weight. The research results obtained a value of 9.8%, KAO then conducted testing of marshall by using a variation of the rubber tyres outside the motor changes characteristic of Marshall, the degree of suppleness and durability is better, but there is a cavity the air that many great VIM or value, so that the value of the VFA became small. From all levels of rubber in asphalt has a great degree of flexibility in rubber 3%, but that filled the whole terms of the 2010 revision 3 technical specifications on levels of 1.5% rubber.Keywords: Latasir Mixture, KAO, Waste Rubber Tyres Outside Motor, Marshall

scholarly journals Fracture Performance of a Large-Stone Asphalt Mixture Based on a Monotonic Tensile Overlay Test

2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Jianhui Wei ◽  
Tao Fu ◽  
Junlin Liang
Keyword(s):  
Constitutive Model ◽  
Fracture Energy ◽  
Asphalt Mixture ◽  
Test Results ◽  
Large Stone ◽  
Loading Mode ◽  
Disturbed State Concept ◽  
Study Results ◽  
Fracture Performance ◽  
Base Course

A large-stone asphalt mixture (LSAM) is usually used as the base course of asphalt pavement to prevent the generation of cracks. However, there are few studies on the fracture performance and crack resistance of LSAMs. Under the monotonic tensile loading mode, the overlay test (OT) was explored to investigate the influence of different test factors on the cracking resistance and fracture performance. The study results indicated that a change in temperature and aging results in a variation in fractal dimension, the fracture energy of crack growth is higher than that of crack initiation, and fracture energy is increased to a certain extent by decreased temperature, an increased loading rate or increased aging. Finally, a constitutive model is established based on the disturbed state concept (DSC), and the proposed constitutive model is consistent with the test results.

The Effect of Compaction Temperatures and Numbers on the Air Void Level of Porous Asphalt Pavements

2021 ◽  
Author(s):  
Ahmet Buğra İbiş ◽  
Burak Şengöz ◽  
Ali Topal ◽  
Derya Kaya Özdemir
Keyword(s):  
Heavy Traffic ◽  
Experimental Studies ◽  
Asphalt Mixture ◽  
Hollow Structure ◽  
Asphalt Pavements ◽  
Void Content ◽  
Porous Asphalt ◽  
Compaction Energy ◽  
Air Void ◽  
Air Void Content

Porous asphalt pavement is defined as an asphalt concrete that is designed with open gradation aggregate which helps in removing the water with an air void content of about 20% by creating drainage channels. Open gradation consists of large amounts of coarse aggregates and small amounts of fine aggregates. The water is drained due to this hollow structure, this air void content in the porous asphalt mixture which inevitably decreases with time is the main parameter affecting the service life as well as the structural and functional performance. Moreover, the reduction in air void content is one of the main reasons for the loss of permeability in porous asphalt pavements and this lead to the increase in pavement density under heavy traffic conditions. Each country has its own technical asphalt specification involving the required compaction energy and temperature. This study involves the effect of compaction temperatures and numbers on the air void in porous asphalt pavements prepared with 50/70 penetration grade bitumen. As a result of experimental studies, it has been observed that the reduced compaction temperature and the number of compaction (energy) increase the air void level in porous asphalt pavements.

Structural Mechanics Analysis of Asphalt Pavement Using Large Stone Asphalt Mixture as Base

2013 ◽  
Vol 838-841 ◽  
pp. 1221-1226
Author(s):  
Xu Liang ◽  
Yin Gu ◽  
Jin Chang Wang ◽  
Ming Xing Yan ◽  
Si Zeng You
Keyword(s):  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Rigid Base ◽  
Pavement Rehabilitation ◽  
Large Stone ◽  
Base Materials ◽  
Bending Strain ◽  
Flexible Base ◽  
Surface Deflection ◽  
Pavement Base

Asphalt pavement with semi-rigid base is the major structure adopted in the new built highway and municipal roads in China. So as to reduce the unfavorable impact on the rehabilitation of municipal roads which require quick resumption of traffic, better base materials should be adopted. If a pavement base fails, the flexible base, i.e. large stone asphalt mixture (LSAM), should be employed in the pavement rehabilitation practice. Focusing on the practice pavement sections using LSAM as base in Hangzhou municipal roads, the effect factors of subgrade modulus, base modulus and base thickness on surface deflection and bending strain in base bottom is analyzed. That work is done through finite element method of software BISAR3.0. The results provide a practice reference for municipal roads rehabilitation needing to open traffic early.

scholarly journals Study on Volume Index Test and Control of Large Stone Porous Asphalt Mixture

2021 ◽  
Vol 769 (3) ◽  
pp. 032014
Author(s):  
Zhigeng Zhang ◽  
Jiasheng Zhao ◽  
Fangtao Liu ◽  
Fei Yang
Keyword(s):  
Asphalt Mixture ◽  
Volume Index ◽  
Index Test ◽  
Porous Asphalt ◽  
Large Stone ◽  
And Control
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