Effects of Steel Wool Distribution on Properties of Porous Asphalt Concrete

2014 ◽  
Vol 599 ◽  
pp. 150-154 ◽  
Author(s):  
Quan Tao Liu ◽  
Shao Peng Wu
Keyword(s):  
Tensile Strength ◽  
Induction Heating ◽  
Asphalt Concrete ◽  
Mixing Time ◽  
Ct Scanning ◽  
Indirect Tensile Strength ◽  
Steel Wool ◽  
Porous Asphalt ◽  
Indirect Tensile ◽  
Porous Asphalt Concrete

An unravelling porous asphalt concrete was developed by adding steel wool and heating it with induction energy. The purpose of this paper is to examine the effects of the steel wool distribution on the properties of this unravelling porous asphalt concrete. The mixture was mixed for 10 min, 12 min, 15 min or 20 min respectively, and then samples were prepared with a gyratory compactor. The steel wool distribution at different mixing time was compared with CT scanning analysis. The electrical resistance, indirect tensile strength and induction heating speed of samples with different mixing time were also studied. It was found that a better distribution of steel wool in porous asphalt concrete increased its indirect tensile strength, but decreased its electrical conductivity and induction heating speed. 15 min mixing is sufficient to disperse steel wool to a homogenous distribution.

Induction heating of electrically conductive porous asphalt concrete

2010 ◽  
Vol 24 (7) ◽  
pp. 1207-1213 ◽  
Author(s):  
Quantao Liu ◽  
Erik Schlangen ◽  
Álvaro García ◽  
Martin van de Ven
Keyword(s):  
Induction Heating ◽  
Asphalt Concrete ◽  
Electrically Conductive ◽  
Porous Asphalt ◽  
Porous Asphalt Concrete

scholarly journals Effects of Using Limestone as a Filler and Starbit E-55 Asphalt as a Binder on the Performance of AC-WC Mixture

2019 ◽  
Vol 258 ◽  
pp. 04005
Author(s):  
Faizul Chasanah ◽  
Fajariesta Arta Putra
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Indirect Tensile Strength ◽  
Permeability Test ◽  
Second Stage ◽  
Performance Requirements ◽  
Indirect Tensile ◽  
Asphalt Content ◽  
Properties Of Materials ◽  
Last Stage

Asphalt concrete can be made through several methods including hot mix using Starbit E-55 asphalt as a binder and limestone as filler. This research aimed to determine the feasibility of the use of limestone as filler in AC-WC mixture and to identify the effects of limestone addition on the Marshall Characteristics, Durability, Indirect Tensile Strength (ITS), and Permeability. The first stage was to test the properties of materials consisting of aggregate, asphalt, and limestone. The second stage was to determine the optimum asphalt content with 0%, 25%, 50%, 75%, and 100% filler proportions, and the last stage was to conduct the Marshall, Immersion, ITS, and Permeability tests. The results showed that limestone has been in accordance with the performance requirements specified for a filler of AC-WC mixture using Starbit E-55 asphalt as a binder. There was a change in the Marshall characteristics of optimum asphalt content. The durability increased, and the ITS values of AC-WC mixture improved along with the increase in limestone proportion. However, the permeability test indicated that the mixture has a poor drainage feature towards water after variation in filler proportions was performed.

The Influence of Coconut Shell as Coarse Aggregates in Asphalt Mixture

2016 ◽  
Vol 700 ◽  
pp. 227-237 ◽  
Author(s):  
Siti Nur Amiera Jeffry ◽  
Ramadhansyah Putra Jaya ◽  
Norhafizah Manap ◽  
Nurfatin Aqeela Miron ◽  
Norhidayah Abdul Hassan
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Resilient Modulus ◽  
Asphalt Mixture ◽  
Indirect Tensile Strength ◽  
Coconut Shell ◽  
Engineering Properties ◽  
Modified Bitumen ◽  
Coarse Aggregates ◽  
Indirect Tensile

Significant quantities of coconut shell (CS), a by-product of agriculture, can be used as an artificial source of coarse aggregates. In this study, four CSs were used as coarse aggregates replacement in asphalt concrete with 0%, 10%, 20%, 30%, and 40% weight volumes. The particle sizes of the CSs used as main coarse aggregates range from 5 mm to 20 mm. The Marshall Stability test shows that the optimum bitumen content for asphalt mixtures is 5.1%. The engineering properties investigated include the volumetric, dynamic creep, indirect tensile strength, and resilient modulus. Test results show that stability decreases with increasing CS content because of high water absorption. Considering that CSs absorb bitumen, a further detailed investigation is needed to assess the performance of modified bitumen on mixture. Furthermore, the use of CSs as coarse aggregates in asphalt concrete help increase the resilient modulus, stiffness, and indirect tensile strength up to 30%. Generally, a 10% replacement of coarse aggregates with CSs is the optimal limit.

Research of Mechanical Properties of Asphalt Pavement Materials with WMA and RAP

2012 ◽  
Vol 204-208 ◽  
pp. 3934-3937 ◽  
Author(s):  
Bao Yang Yu ◽  
Yu Wang ◽  
Min Jiang Zhang
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Dynamic Modulus ◽  
Asphalt Pavement ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Indirect Tensile Strength ◽  
Porous Asphalt ◽  
Compaction Energy ◽  
Indirect Tensile

The objectives of this paper are to characterize the mechanical properties of porous asphalt pavement mixtures containing RAP and a WMA additive using Super pave gyratory compactor and dynamic modulus testing. Four types of asphalt mixtures were evaluated in this study. This study evaluated compaction energy index, permeability, indirect tensile strength, and dynamic modulus for all types of porous asphalt mixtures. All of the asphalt mixtures meet the typical minimum coefficient of permeability in this study. In addition, only a slight decrease in was found when WMA additive was added to the porous asphalt mixture containing RAP. For indirect tensile strength testing, WMA containing RAP was found to have the highest tensile strength among all of the mixtures tested.

Unravelling porous asphalt concrete with induction heating

2014 ◽  
Vol 71 ◽  
pp. 152-157 ◽  
Author(s):  
Quantao Liu ◽  
Wan Yu ◽  
Erik Schlangen ◽  
Gerbert van Bochove
Keyword(s):  
Induction Heating ◽  
Asphalt Concrete ◽  
Porous Asphalt ◽  
Porous Asphalt Concrete

Use of steel slag aggregate in asphalt concrete mixes

2007 ◽  
Vol 34 (8) ◽  
pp. 902-911 ◽  
Author(s):  
Ibrahim M Asi ◽  
Hisham Y Qasrawi ◽  
Faisal I Shalabi
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Coarse Aggregate ◽  
Resilient Modulus ◽  
Steel Slag ◽  
Indirect Tensile Strength ◽  
Engineering Properties ◽  
Optimal Replacement ◽  
Indirect Tensile ◽  
Creep Modulus

There are three major steel-manufacturing factories in Jordan. All of their by-product, steel slag, is dumped randomly in open areas, causing many environmentally hazardous problems. This research was intended to study the effectiveness of using steel slag aggregate (SSA) in improving the engineering properties of locally produced asphalt concrete (AC) mixes. The research started by evaluating the toxicity and chemical and physical properties of the steel slag. Then 0%, 25%, 50%, 75%, and 100% of the limestone coarse aggregate in the AC mixes was replaced by SSA. The effectiveness of the SSA was judged by the improvement in indirect tensile strength, resilient modulus, rutting resistance, fatigue life, creep modulus, and stripping resistance of the AC samples. It was found that replacing up to 75% of the limestone coarse aggregate by SSA improved the mechanical properties of the AC mixes. The results also showed that the 25% replacement was the optimal replacement level. Key words: steel slag aggregate, asphalt concrete, Superpave, indirect tensile strength, fatigue, rutting, creep.

scholarly journals Asphalt concrete mixtures with addition of reclaimed asphalt pavements

2021 ◽  
Author(s):  
Piotr Zieliński
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Asphalt Mixtures ◽  
Indirect Tensile Strength ◽  
Asphalt Pavements ◽  
Stiffness Modulus ◽  
Reclaimed Asphalt ◽  
Concrete Mixtures ◽  
Indirect Tensile ◽  
Reclaimed Asphalt Pavements

The effect of using reclaimed asphalt pavements (RAP) to asphalt concrete mixtures besides their utilization is to reduce the amount of the new bituminous binder and aggregate added to hot mix asphalt. This publication presents studies on asphalt mixtures with an increased up to 40% amount of RAP additive with the simultaneous use of 2 types of added bitumen, i.e. 35/50 and PMB 25/55-60. The aim of the paper is the evaluation of the basic mixture properties in a wide range of operating temperatures, as a part of the AC testing at high temperatures, the resistance to rutting at 60° C and indirect tensile strength at 40° C. The assessment of properties at intermediate operating temperatures is based on indirect tensile tests, including: elastic stiffness modulus at 5° C, 15° C and 30° C and static strength at 25° C. The low temperature properties have been tested in water and frost resistance tests by indirect tensile strength ratio. The results of the study were subjected to the analysis of the statistical significance of differences, which showed an improvement in the resistance of AC with the addition of RAP to the formation of permanent deformations and an increase in the stiffness modulus as well as indirect tensile strength. There was no adverse effect of the RAP additive on asphalt mixtures resistance to water and frost action.

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