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.

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.

scholarly journals The Use of Steel Slag as Substitution of Coarse Aggregate on Indirect Tensile Strength and Marshall Properties of AC-WC

2021 ◽  
Vol 933 (1) ◽  
pp. 012004
Author(s):  
A A Nugraha ◽  
M Fauziah ◽  
Subarkah
Keyword(s):  
Tensile Strength ◽  
Coarse Aggregate ◽  
Permanent Deformation ◽  
Steel Slag ◽  
Fatigue Cracking ◽  
Indirect Tensile Strength ◽  
Coarse Aggregates ◽  
Experimental Laboratory ◽  
Indirect Tensile ◽  
Polymer Modified Asphalt

Abstract High traffic levels on road can causing road damage, especially cases of permanent deformation and fatigue cracking. One solution is to utilize waste of material, such as steel slag as coarse aggregate and polymer modified asphalt as binding material. This paper explores experimental laboratory investigation on the use of steel slag on Marshall characteristics and indirect tensile strength of AC-WC mixture by using Starbit E-60 and Pen 60/70. Laboratory works begin with physical testing of material, then, finding the optimum bitumen content (OBC) for each type of the mixtures. Finally, Marshall Standard and indirect tensile strength (ITS) at OBC were conducted. Results shows that the use of steel slag for AC-WC mixture are proven to improve resistance to permanent deformation as well as fatigue cracking. Substitution of steel slag for coarse aggregates were able to increase Marshall stability, Marshall Quotient and indirect tensile strength (ITS) of the mixtures, however, it slightly decreases the volumetric performance of mixture, such as voids in total mixes become higher and voids filled with asphalt as well as voids in mineral aggregates tend to decrease.

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.

scholarly journals EVALUATION OF THE PERFORMANCE OF WASTE MARBLE DUST AS A MINERAL FILLER IN HOT-MIX ASPHALT CONCRETE

2021 ◽  
Vol 12 (1) ◽  
pp. 1-14
Author(s):  
Levy Sang ◽  
Temitope Idowu ◽  
Victoria Okumu
Keyword(s):  
Tensile Strength ◽  
Hot Mix Asphalt ◽  
Indirect Tensile Strength ◽  
Engineering Properties ◽  
Sustainable Construction ◽  
Mineral Filler ◽  
Marble Dust ◽  
Indirect Tensile ◽  
Expanding Population ◽  
Marshall Stability

As the construction industry continues to evolve globally, there is a need to develop best practices geared towards achieving sustainable construction. Asphalt concrete’s demand has been increasing steadily with an estimated global demand of 122.5 million tons in 2019. This is driven primarily by the growth in construction activities in developing countries as each country works towards enhancing its transportation facilities to cater to the ever-expanding population. Hence, there are needs to develop newer and more efficient means of asphalt consumption. One of such is identifying cheaper or waste materials for use in Asphalt production. This study, therefore, examined the viability of waste marble dust (WMD), an industrial waste produced during the shaping and polishing of marble blocks and also during its extraction from the mines, as a mineral filler in Hot-mix asphalt (HMA) concrete. Engineering properties such as Marshall stability and flow, Void characteristics, Indirect tensile strength and Tensile strength ratio properties were examined. It was observed that the addition of WMD steadily increased the Marshall Stability and indirect tensile strength values and lowered the voids percentages. The study’s major finding is that waste marble dust is highly suitable as a mineral filler in HMA and a 3% by volume addition of WMD in HMA at 4.5% binder content produced the most optimal mix for use in road pavements.

Laboratory Performance Evaluation of Cement-Stabilized Soil Base Mixtures

2000 ◽  
Vol 1721 (1) ◽  
pp. 19-28 ◽  
Author(s):  
Louay N. Mohammad ◽  
Amar Raghavandra ◽  
Baoshan Huang
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Unconfined Compressive Strength ◽  
Resilient Modulus ◽  
Flexible Pavements ◽  
Indirect Tensile Strength ◽  
Treated Soil ◽  
Stabilized Soil ◽  
Indirect Tensile ◽  
Soil Mixtures

In-place cement-stabilized soils have served as the primary base material for the majority of noninterstate flexible pavements in Louisiana for many years. These materials are economically and easily constructed and provide outstanding structural characteristics for flexible pavements. However, these cement-treated materials crack due to shrinkage, with the cracks reflecting from the base to the surface. A laboratory study examined the performance of four different cement-stabilized soil mixtures recently used in the construction of test lanes at the Louisiana Pavement Testing Facilities. Laboratory tests included the indirect tensile strength and strain, unconfined compressive strength, and indirect tensile resilient modulus tests. The four mixtures were ( a) in-place-mixed cement-treated soil with 10 percent cement, ( b) plant-mixed cement-treated soil with 10 percent cement, ( c) plant-mixed cement-treated soil with 4 percent cement, and ( d) plant-mixed cement-treated soil with 4 percent cement and fiber reinforcement. The results indicated that there was no significant difference in performance between the plant-mixed and in-place-mixed cement-treated soil mixtures. The inclusion of fiber to the cement-treated soil mixture significantly increased the indirect tensile strain and the toughness index. Increases in compaction effort maintained or significantly increased the indirect tensile strength and unconfined compressive strength. Increases in curing period maintained or significantly increased indirect tensile and unconfined compressive strength as well as the resilient modulus of the mixtures.

scholarly journals Comparing the Effect of Nanomaterial and Traditional Fillers on the Asphalt Mixture Properties

2019 ◽  
Vol 5 (2) ◽  
pp. 320
Author(s):  
Gholam Hossein Hamedi
Keyword(s):  
Tensile Strength ◽  
Environmental Conditions ◽  
Resilient Modulus ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Indirect Tensile Strength ◽  
Strength Ratio ◽  
Nano Silica ◽  
Stone Materials ◽  
Indirect Tensile

Several parameters affect asphalt mix performance against loading and environmental conditions. Minor changes in the filler amount or type can cause obvious changes in the asphalt mixture properties. Accordingly, in this research attempts have been made to optimally make asphalt mixture strong against loading and environmental conditions by changing the type, size and percentage of filler used in asphalt mixture. In this line, the effect of two types of cement and nano-silica fillers in two different percentages was investigated and compared as an alternative for part of the main filler in asphalt mixture samples made by two types of limestone and granite aggregate. Cement filler by 2% and 4% of the aggregate mass as the alternative for part of the main filler is added to stone materials before mixing with binder, but nano-silica filler by 2% and4 % of weight of the binder as the alternative for part of the main filler is added to binder and a modified and homogeneous binder is produced using a high speed mixer. In the following, considering the optimum binder content for each mixture, resilient modulus tests were conducted to determine the strength performance against loading and indirect tensile strength ratio was used to determine moisture sensitivity of asphalt mixtures. Results obtained from resilient modulus tests show that the use of nano-silica and cement has been capable of favorably improving the resilient modulus of samples containing these two types of fillers. The improvement of the resilient modulus of samples containing nano-silica is very significant. Additionally, the studies conducted based on the indirect tensile strength ratio show that both types of alternative fillers, especially cement has been capable of desirably improve the strength of asphalt mixtures against moisture damage.

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.

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