scholarly journals Bonding Evaluation of Asphalt Emulsions used as Tack Coats through Shear Testing

2019 ◽  
Vol 9 (9) ◽  
pp. 1727 ◽  
Author(s):  
José Roberto Galaviz-González ◽  
David Avalos Cueva ◽  
Pedro Limón Covarrubias ◽  
Miguel Zamora Palacios
Keyword(s):  
Fracture Energy ◽  
Asphalt Pavement ◽  
Shear Testing ◽  
Asphalt Emulsion ◽  
Top Down ◽  
Structural Problems ◽  
Rapid Setting ◽  
Asphalt Content ◽  
Asphalt Emulsions

A poor bond between the layers constituting an asphalt pavement can cause structural problems such as slippage, delamination, and top-down cracking. These are consequences of the pavement being unable to act as a continuous element and to properly transmit the effects of the traffic to underlying layers. The aim of this research was to characterize an asphalt emulsion with low asphalt content using the Mexican standard and to evaluate its performance through the Laboratorio de Caminos de Barcelona (LCB) shear testing. Cationic slow setting (SS) and cationic rapid setting (RS) asphalt emulsions were tested by varying the asphalt contents, dosages, and cure times. The slow set emulsions presented a greater fracture energy than did the rapid set emulsions; a dose of 0.3 L/m2 provided the same level of resistance as a 0.5 L/m2 dose; and a 55% asphalt content provided greater resistance than the 60% asphalt content.

The Influence of Time after Crushing for Cold In-Place Recycling on Compaction and Raveling

2019 ◽  
Vol 2673 (3) ◽  
pp. 419-426 ◽  
Author(s):  
Erica Yeung ◽  
Andrew Braham
Keyword(s):  
Asphalt Pavement ◽  
Milling Process ◽  
Reclaimed Asphalt Pavement ◽  
Asphalt Emulsion ◽  
Stabilizing Agent ◽  
Reclaimed Asphalt ◽  
Limestone Aggregate ◽  
Asphalt Emulsions ◽  
Test Aggregate

Cold in-place recycling (CIR) mills existing bound pavement with a stabilizing agent to remove all surface distresses and some structural distresses. This research investigated the influence of extending the time after crushing, aggregate type, and asphalt emulsion type on four CIR compaction metrics and on the raveling test. Aggregate was crushed in the lab to mimic the milling process of CIR and was mixed with laboratory produced asphalt emulsion at various times after crushing. Three types of aggregate were used, including one field reclaimed asphalt pavement (RAP), a limestone-based laboratory-produced RAP, and a syenite-based laboratory-produced RAP. Two types of cationic medium set (CMS) asphalt emulsions were also used: a proprietary and a commodity asphalt emulsion. One of the compaction metrics, the number of gyrations to 76% Density ( N76), was found to have the most promise for capturing the charge on the RAP, as the limestone aggregate and proprietary asphalt emulsion saw the highest resistance to compaction. These two materials were the most reactive so it was reasonable that they caused the fastest break of the asphalt emulsion. The raveling test did not produce similarly conclusive results. Whereas some trends from the raveling test showed the ability to capture charge on the RAP, perhaps the four-hour cure before the raveling test may have masked any influence of time after crushing and asphalt emulsion type.

scholarly journals Effect of Damage Caused by Site Materials on the Performance of Nonwoven Geotextiles Impregnated With Asphalt Emulsions Used on Paving

2020 ◽  
Author(s):  
Mateus A. Lima ◽  
Jefferson Lins da Silva ◽  
Maria L. C. Lopes
Keyword(s):  
Granular Materials ◽  
Polyethylene Terephthalate ◽  
Hydraulic Properties ◽  
High Load ◽  
Asphalt Pavements ◽  
Asphalt Emulsion ◽  
Rapid Setting ◽  
Damage Process ◽  
Asphalt Emulsions ◽  
Asphalt Overlays

A rehabilitation technique for asphalt pavements with geosynthetic is the application of impregnated nonwoven geotextiles between deteriorated and new asphalt overlays. The performance investigation of impregnated geotextiles proves that they are enhancing in mechanical and hydraulic properties. Although, the installation process may cause severe impacts on these materials’ performance. During the installation, the geotextile suffers damage due to the traffic of high load vehicles, as compactors and pavers, and the friction with granular materials found under its layer or poured above it. This paper aims to investigate how the damage caused by granular materials on nonwoven geotextiles impregnated with different asphalt emulsions effect on their strength resistance and permittivity. From two types of nonwoven geotextiles: polypropylene and polyethylene terephthalate, the comparison uses geotextiles in three conditions: not impregnated, impregnated with asphalt emulsion of rapid setting, and impregnated with asphalt emulsion changed by an elastomeric polymer. Part of the samples followed the damage according to ISO 10722 procedure, placed between three different scenarios of granular materials, applying gravel, sand, and clay. After the damage process, the samples were submitted to mechanical and hydraulic properties evaluations.

scholarly journals Evaluation of Bleeding Resistance in Chip Seal and Asphalt Emulsion Residue Rheology

Coatings ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 670
Author(s):  
Preeda Chaturabong
Keyword(s):  
Influence Factors ◽  
Application Rate ◽  
Test Methods ◽  
Test Results ◽  
Asphalt Emulsion ◽  
Aggregate Gradation ◽  
Factors Affecting ◽  
Promising Tool ◽  
Chip Seal ◽  
Asphalt Emulsions

Chip seal bleeding is influenced by many factors, including design inputs, material properties, and project-specific conditions. It reduces the surface texture of the pavement and thus compromises the safety of the traveling public. Even though factors that bring about premature bleeding are known, currently, no laboratory test methods for evaluating bleeding in chip seals have been specified. The objective of this paper is to present the results of an investigation of the influence factors of asphalt emulsion residue properties measured by the ASTM D7405 multiple stress creep and recovery (MSCR) test, as well as other factors related to chip seal bleeding resistance as measured by the modified loaded wheel test (MLWT). In this study, the MSCR test was used as a tool for evaluating the performance of asphalt emulsions because it has been identified as a potential test related to bleeding in the field. In addition, MLWT was selected as a tool for evaluating chip seal bleeding performance in the laboratory. The results of the MLWT showed that the emulsion application rate (EAR), aggregate gradation, and emulsion properties were significant factors affecting bleeding. The MSCR test was found to be a promising tool for the performance evaluation of asphalt emulsion residue, as the test was able to differentiate between emulsion chemistries and modifications in terms of sensitivity to both temperature and stress. In relation to chip seal bleeding resistance, only the creep compliance (Jnr) obtained from the MSCR test results was identified as a significant property affecting potential for bleeding.

Asphalt pavement unified mechanical potential damage model for top-down cracks and rutting distress

2021 ◽  
pp. 188-193
Author(s):  
Song Jian ◽  
Shi Jiangtao ◽  
Wang He ◽  
Li Xiaojun*
Keyword(s):  
Asphalt Pavement ◽  
Damage Model ◽  
Top Down ◽  
Potential Damage

scholarly journals Characteristics of masonry block that utilizes reclaimed asphalt pavement and waste cooking oil as the binder

2019 ◽  
Vol 276 ◽  
pp. 03001
Author(s):  
I Nyoman Arya Thanaya ◽  
I Nyoman Karnata Mataram ◽  
Bayu Setiawan
Keyword(s):  
Compressive Strength ◽  
Asphalt Pavement ◽  
Waste Cooking Oil ◽  
National Standard ◽  
Reclaimed Asphalt Pavement ◽  
Aggregate Gradation ◽  
Reclaimed Asphalt ◽  
Cooking Oil ◽  
Asphalt Content ◽  
Natural Aggregates

The availability of natural aggregate is getting limited, therefore it is required new alternative materials to substitute natural aggregates. Within this experiment reclaimed asphalt pavement (RAP) was used as masonry block with waste cooking oil as the binder. The objective of this experiment was to analyze the RAP asphalt content and aggregate gradation; and the samples characteristics particularly the compressive strength of masonry block minimum of 25 kg/cm2 that meet the Indonesian national standard SNI-03-0348-1989. The asphalt content of the RAP was initially extracted and tested for its aggregate gradation and specific gravity. The RAP was added 20% sand and a certain amount of waste cooking oil and evenly mixed. After that the mixture was compacted in a mould with a Marshall hummer, with compaction cycles for 15, 25, and 35 times where each cycle consists of 3 even blows. The size of the compacted samples were 20x10x8cm. After the samples were taken out from the mould, they were heated in an oven for 12 and 24 hours at 160°C and 200°C. It was found that the minimum waste cooking oil content required 4%. The best compressive strength was found on samples compacted at 15 compaction cycles and heated at 200°C for 24 hours. The un-soaked compressive strength was 80.5 kg/cm2 and 68.67 kg/cm2 for the soaked samples. In general the compressive strength well met the minimum 25 kg/cm2. Other best characteristics was found on samples heated at 160°C for 12 hours, with lowest water absorption of 5.64% and porosity of 4.53%. The Initial Rate of Suction (IRS) was 0,25~0,45 kg/m2.minute.

scholarly journals Evaluation performance of base course mixture containing reclaimed asphalt pavement (RAP)

2018 ◽  
Vol 162 ◽  
pp. 01037 ◽  
Author(s):  
Karim Al helo ◽  
Zaynab Qasim ◽  
Ahmed Majeed
Keyword(s):  
Asphalt Pavement ◽  
Stability Test ◽  
Reclaimed Asphalt Pavement ◽  
Test Results ◽  
Reclaimed Asphalt ◽  
Superpave Gyratory Compactor ◽  
Asphalt Mix ◽  
Asphalt Content ◽  
Base Course ◽  
Durability Performance

This paper presented the effect of addition of Reclaimed Asphalt Pavement (RAP) on performance of mixture with (20%, 30%, 40% and 50%) RAP as proportion of asphalt mix. To compare with virgin mixture marshall flow and stability test was used to evaluated durability performance with (0,1,3, and 7) days immersion and Wheel Truck test was used to evaluated the resist to rutting. The best gradation and optimum asphalt content was selected according to Superpave system. Superpave Gyratory Compactor (SGC) was used to compact mixture with 100-mm diameter. The test results indicated that addition of RAP to mixes showed significant increase on resistance of Durability and Rutting.

scholarly journals Rheological and Molecular Characterization of Rubberized Asphalt Emulsion

2019 ◽  
Vol 271 ◽  
pp. 03001
Author(s):  
Nafiur Rahman ◽  
Tanvir Sarkar ◽  
Mostafa Elseifi
Keyword(s):  
Molecular Characterization ◽  
Gel Permeation Chromatography ◽  
Crumb Rubber ◽  
Infrared Analysis ◽  
Asphalt Emulsion ◽  
Asphalt Rubber ◽  
Physical Testing ◽  
Asphalt Emulsions ◽  
Aged Binder

An experimental study was conducted to evaluate the rheological and molecular characterization of rubberized asphalt emulsion. One rubberized asphalt emulsion and an asphalt rubber (CRS-2TR and AC20-TR) and two conventional emulsions (CRS-2 and CRS-2P) were evaluated. The emulsions were characterized by conducting rheological and physical testing. The influence of adding crumb rubber on the binder chemical composition was investigated in the laboratory using Fourier Transform Infrared Analysis (FTIR) on the original, Rolling-Thin Film Oven (RTFO) and Pressure Aging Vessel (PAV)-aged binder residues. Results showed that CRS-2TR and AC20-TR had lower carbonyl and sulfoxide indices indicating better resistance to aging compared to conventional asphalt emulsions. Results of High-Pressure Gel Permeation Chromatography (HP-GPC) on the original, RTFO and PAV-aged binder residues showed that CRS-2TR and AC20-TR had similar High-Molecular Weight (HMW) content compared to that of conventional asphalt emulsions indicating similar susceptibility to brittleness with age.

Research and Application on the Crumb Rubber Modified Low-Noise Asphalt Pavement

2011 ◽  
Vol 374-377 ◽  
pp. 1351-1356
Author(s):  
Zhi Xiang Zhang ◽  
Wei Liu ◽  
Xiao Yan Li
Keyword(s):  
Asphalt Pavement ◽  
Sound Intensity ◽  
Crumb Rubber ◽  
Test Methods ◽  
Low Noise ◽  
Performance Tests ◽  
Materials Selection ◽  
Content Selection ◽  
Asphalt Content ◽  
Pavement Noise

In this paper, the research of Low-Noise Asphalt Pavement（LNAP）mix design with the crumb rubber has been studied, including materials selection, gradation selection, asphalt content selection, performance tests, and so on. To verify the high-temperature performance and the effect of noise reducing, the new test methods are studied in the lab. The On-board Sound Intensity (OBSI) is developed to measure the tire-pavement noise and evaluate the noise reducing effect of trial pavement. The QC and QA of LNAP is researched by the trial pavement and the tire-pavement noise is measured by the OBSI，the LNAP has not only the good performance but also low noise than the conventional asphalt pavement.

Investigation of mechanisms of top-down fatigue cracking of asphalt pavement

2017 ◽  
Vol 19 (6) ◽  
pp. 1436-1447 ◽  
Author(s):  
Yanqing Zhao ◽  
Mohsen Alae ◽  
Guozhi Fu
Keyword(s):  
Asphalt Pavement ◽  
Fatigue Cracking ◽  
Top Down

Test and Analysis on Asphalt Content for Fatigue Performance of Polyester Fiber Asphalt Concrete

2016 ◽  
Vol 852 ◽  
pp. 1488-1492 ◽  
Author(s):  
Jin Rong Wu ◽  
Qin Yong Ma ◽  
Xiao Hong Dong
Keyword(s):  
Asphalt Concrete ◽  
Structural Design ◽  
Asphalt Pavement ◽  
Polyester Fiber ◽  
Fatigue Performance ◽  
Fatigue Properties ◽  
Bending Tests ◽  
Three Point Bending ◽  
Asphalt Content ◽  
Improve Fatigue

The change law for fatigue properties of polyester fiber asphalt concrete was acquired under different asphalt content by three point bending tests. The results indicate that fatigue life of polyester fiber asphalt concrete increases firstly and then declines with asphalt content increasing, which shows an optimum asphalt content,4.8%. The optimal asphalt content of polyester fiber asphalt concrete is bigger than that of common asphalt concrete. The way to improve fatigue performance of asphalt pavement is found through studying on polyester fiber asphalt concrete. All will provide a theoretical basis for structural design of asphalt pavement.

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