scholarly journals Investigating the Effect of Anti Stripping Agents (ASAs) on Fatigue and Rutting Properties of Stone Matrix Asphalt (SMA) Mixtures Modified by Ground Tire Rubber (GTR) and Waste Polyethylene Terephthalate (PET)

2020 ◽  
Author(s):  
Alireza Ameli ◽  
Javad Maher ◽  
Amir Mosavi ◽  
Narjes Nabipour ◽  
Rezvan Babagoli ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Fatigue Life ◽  
Polyethylene Terephthalate ◽  
Resilient Modulus ◽  
Tire Rubber ◽  
Ground Tire Rubber ◽  
Rutting Resistance ◽  
Stone Matrix Asphalt ◽  
Waste Polyethylene ◽  
Stone Matrix

The current study assessed the influence of Anti Stripping Agents (ASA), Ground Tire Rubber (GTR) and waste polyethylene terephthalate (PET) on performance behavior of binder and Stone Matrix Asphalt (SMA) mixtures. Through this paper, the 85/100 penetration grade bitumen was utilized as original bitumen. Also, three liquid ASA’s (ASA (A), ASA (B), ASA (C)) were used as a mixture modifier. For this purpose, softening point, penetration, rotational viscosity, Dynamic Shear Rheometer, Multi Stress Creep Recovery (MSCR) and Linear Amplitude Sweep (LAS) tests were implemented to investigate the rheological properties of modified bitumen. For evaluating the behavior of modified mixtures several tests such as; Resilient Modulus, Tensile Strength, dynamic creep, wheel track and four-point beam fatigue tests were implemented. Based on MSCR test results, utilization of mentioned polymers enhanced the elasticity of bitumens and therefore the permanent deformation resistance of binders increases. Also by the addition of PET percentage, the rutting resistance improves. Results indicated that utilization of ASAs, PET and Crumb Rubber (CR) enhance the Resilient Modulus (Mr), Indirect Tensile Strength (ITS), rutting resistance, fatigue life and Fracture Energy (FE) of asphalt mixtures. Also based on results, modification of binder by PET/CR with a ratio of 50%/50% and ASA (B) have the highest fatigue life which indicates that this mixture has highest resistance against fatigue cracking.

scholarly journals Evaluation of the Influence of Antistripping Agents on Water Sensitivity of the Stone Matrix Asphalt Mixture Modified by Recycled Ground Tire Rubber and Waste Polyethylene Terephthalate

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
Alireza Ameli ◽  
Rezvan Babagoli
Keyword(s):  
Tensile Strength ◽  
Fracture Energy ◽  
Polyethylene Terephthalate ◽  
Resilient Modulus ◽  
Tire Rubber ◽  
Ground Tire Rubber ◽  
Stone Matrix Asphalt ◽  
Water Sensitivity ◽  
Waste Polyethylene ◽  
Stone Matrix

This research intends to evaluate the effects of the waste polyethylene terephthalate (PET), antistripping agents (ASA), and ground tire rubber (GTR) on the performance properties of the stone matrix asphalt (SMA) mix binder/water damage resistance. Liquid antistripping agents, added to 85/100 penetration grade binder to evaluate the ASA effects, were A (M500), B (EvothermM1), and C (LOF-6500). Tests conducted to study the modified bitumen’s rheological properties included softening point, penetration, rotational viscosity (RV), and dynamic shear rheometer (DSR), and tests performed in order to examine the moisture sensitivity of the modified mix were the Texas boiling and resilient modulus (MR), fracture energy (FE), and indirect tensile strength (ITS) ratio tests. Results showed that the MR, ITS, and FE of asphalt mixes modified with crumb rubber (CR), ASA, and PET were improved. Adding 50% PET, 50% CR, and ASA (B) led to the highest tensile strength, resilient modulus, and fracture energy ratios showing a perfect water susceptibility of the mentioned mix.

scholarly journals Assessment of Rutting Resistance and Healing for Stone Matrix Asphalt Concrete (SMAC)

2019 ◽  
Vol 11 (2) ◽  
pp. 60-69
Author(s):  
Saad Issa Sarsam ◽  
Shahed Mahmood Khalil
Keyword(s):  
Fly Ash ◽  
Asphalt Concrete ◽  
Resilient Modulus ◽  
Permanent Deformation ◽  
Healing Process ◽  
Rutting Resistance ◽  
Stone Matrix Asphalt ◽  
Compressive Stresses ◽  
Asphalt Content ◽  
Stone Matrix

Stone Matrix Asphalt Concrete (SMAC) is known as tough, stable, rut-resistant mixture. In this investigation, SMAC was prepared in the laboratory using gap graded aggregates, asphalt cement, mineral filler and coal fly ash as stabilizing agent. Specimens were prepared using static compaction to the target density based on asphalt content for each case. The prepared Specimens were subjected to the 1200 repeated compressive stresses at 25 ºC under various stress levels using the pneumatic repeated load system PRLS. Specimens were subjected to microcrack healing process by external heating for 120 minutes at 60 °C, then it practices another cycle of repeated compressive stresses. The resilient modulus, permanent deformation, and rutting resistance under three levels of stress have been assessed. It was concluded that the resilient modulus Mr increases by (66, 50 and 31) %, (36, 50 and 31) % and (62, 37 and 69) %, while the permanent deformation decreases by (25, 11.4 and 25) %, (19, 31.6 and 14.5) % and (14, 9 and 8.3) % after implementation of fly ash at (OAC-0.5, OAC and OAC+0.5) % binder content under (0.068, 0.138 and 0.206) MPa of repeated compressive stress respectively. The resilient modulus increased by (17.6, 15.3, 10.5) % , (42.8, 51, 37.5) % and (18.7, 25, 23.6) %  and the permanent deformation decline by (3.52, 31.66, 6.25) % under repeated compressive stresses of (0.068, 0.138, 0.206) MPa at (25 °C) after healing for mix with (4.6, 5.1, 5.6) % asphalt content  respectively when compared with mixtures before healing.

Investigation of Stone Matrix Asphalt Mortars

1996 ◽  
Vol 1530 (1) ◽  
pp. 95-102 ◽  
Author(s):  
E. Ray Brown ◽  
John E. Haddock ◽  
Campbell Crawford
Keyword(s):  
Resilient Modulus ◽  
Heavy Traffic ◽  
The United States ◽  
Asphalt Pavements ◽  
Fine Aggregate ◽  
Asphalt Cement ◽  
Stone Matrix Asphalt ◽  
Initial Application ◽  
Indirect Tensile ◽  
Stone Matrix

The use of stone matrix asphalt (SMA) has continued to increase in the United States since its initial application in 1991. This preference for SMA has been linked to its ability to withstand heavy traffic without rutting. The antirutting capability of SMA is normally accredited to the presence of a stone-on-stone aggregate skeleton in the mixture. However, the mortar in an SMA mixture is also important. The mortar is composed of fine aggregate, filler, asphalt cement, and a stabilizing additive. Work to characterize SMA mortars is detailed. For testing purposes, the mortar was broken into separate phases, total mortar and fine mortar. The fine mortar was tested using the Superior Performing Asphalt Pavements system (Superpave) binder tests. The total mortar was tested using the bending beam rheometer, resilient modulus, indirect tensile test, and Brookfield vis-cometer. The results indicate that the fine and total mortars are closely related. In addition, it was determined that at least some of the Superpave tests can be used to characterize SMA mortars. It is recommended that further testing be completed and specification criteria be established for the mortar.

Relationship between Compressive, Splitting Tensile and Flexural Strength of Concrete Containing Granulated Waste Polyethylene Terephthalate (PET) Bottles as Fine Aggregate

2013 ◽  
Vol 795 ◽  
pp. 356-359 ◽  
Author(s):  
Mohd Irwan Juki ◽  
Mazni Awang ◽  
Mahamad Mohd Khairil Annas ◽  
Koh Heng Boon ◽  
Norzila Othman ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Polyethylene Terephthalate ◽  
Fine Aggregate ◽  
Pet Bottles ◽  
Fine Aggregates ◽  
Compressive Strength Of Concrete ◽  
Waste Polyethylene

This paper describes the experimental investigation of relationship between splitting tensile strength and flexural strength with the compressive strength of concrete containing waste PET as fine aggregates replacement. Waste PET was reprocesses and used as the artificial fine aggregate at the replacement volume of 25%, 50% and 75%, Cylindrical and prism specimens were tested to obtain the compressive, splitting tensile and flexural strength at the age of 28 days. Based on the investigation, a relationship for the prediction of splitting tensile and flexural strength was derived from the compressive strength of concrete containing waste PET as fine agglegate replacement.

scholarly journals Flexural-Fatigue Properties of Sustainable Pervious Concrete Pavement Material Containing Ground Tire Rubber and Silica Fume

2019 ◽  
Vol 11 (16) ◽  
pp. 4467 ◽  
Author(s):  
Hanbing Liu ◽  
Guobao Luo ◽  
Peilei Zhou ◽  
Haibin Wei ◽  
Wenjun Li ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Weibull Distribution ◽  
Silica Fume ◽  
Pervious Concrete ◽  
Likelihood Method ◽  
Tire Rubber ◽  
Ground Tire Rubber ◽  
Survival Probabilities ◽  
Stress Levels ◽  
Two Parameter

With the development of urbanization, pervious concrete has been increasingly used in urban road pavement structures. The objective of this paper was to investigate the effect of stress levels and modifier (ground tire rubber and silica fume) on the fatigue life of pervious concrete and establish the fatigue equations with different survival probabilities. In order to improve the deformability of pervious concrete without sacrificing its strength, ground tire rubber and silica fume were added into pervious concrete. Two kinds of pervious concrete, control pervious concrete and ground tire rubber and silica fume modified pervious concrete, were made in the laboratory. The pervious concrete beam specimens of 100 × 100 × 400 mm were casted, and the static flexural strength and flexural strain of the two kinds of pervious concrete were tested. The fatigue lives of two pervious concretes were tested using MTS fatigue testing machine under four different stress levels (0.85, 0.80, 0.75, and 0.70). The fatigue life was analyzed by two-parameter Weibull distribution. The parameters of Weibull distribution were determined by graphical method, maximum likelihood method and moment method. The Kolmogorov–Smirnov test was used to test the Weibull distribution and the fatigue equations under different survival probabilities were established. The results showed that ground tire rubber and silica fume modified pervious concrete had better deformability while ensuring strength compared to control pervious concrete. The addition of ground tire rubber and silica fume improved the fatigue life of pervious concrete. The two-parameter Weibull distribution was suitable to characterize the fatigue characteristics and predict the fatigue life of pervious concrete. Fatigue equations with different survival probabilities were a good guide for pervious concrete design.

scholarly journals Effect of Ground Tire Rubber on Mechanical Properties of Low Density Polyethylene

2021 ◽  
Vol 8 (2) ◽  
pp. 85-92
Author(s):  
Mushtaq Asim ◽  
Khan Raza Muhammad ◽  
Ali Zaeem Uddin
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Thermoplastic Elastomer ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Rubber Content ◽  
Percentage Elongation ◽  
Tire Rubber ◽  
Ground Tire Rubber ◽  
Elastomer Blend

This research explores the effect of ground tire rubber (GTR) on the mechanical properties of LDPE. This thermoplastic-elastomer blend sets the composition of ground tire rubber and low-density polyethylene (LDPE/GTR). The blend was prepared in different proportions and was processed in a compression molding machine. The optimum operating conditions of the blend set to be 220℃ temperature and pressure varied from 150-200 bars. Different parts per hundred rubber (phr) samples were obtained under these conditions, including 1 phr, 2 phr, 3 phr, 4 phr, and 5 phr. After that, the mechanical properties of the blend were examined concerning various compositions. Different testing methods were used to determine the mechanical properties of the thermoplastic-elastomer blend, which include tensile strength, flexural strength, and Izod impact. The results obtained from these tests show that tensile strength and modulus decreases by increasing the rubber content. However, impact strength and percentage elongation increase by increasing the rubber content. This enhancement in impact and percentage elongation may be suitable for the applications in gymnasium mat and automobile industry.

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