Relation Between Bitumen Content and Percentage Air Voids in Semi Dense Bituminous Concrete

The continuous increase in road traffic and heavy loading in combination with insufficient maintenance due to paucity of funds has resulted in deterioration of road network in India. To improve this proper maintenance, effective and improved roadway design, use of better quality materials and use of effective and modern construction techniques should be put into practice. During last three decades in many countries around the world it has been tested that modification of the bituminous binder with plastic/polymer additives enhances the properties and life of bituminous concrete pavements. The present investigation was carried out to propose the use of plastic coated aggregate (PCA) in bituminous mix of flexible pavements in order to improve their performance and also to give a way for safe disposal of plastic wastes in order to counter environmental pollution as well. There are mainly two processes available for incorporation of waste plastic in bituminous concrete mixes namely wet and dry process. In this study the dry process was used for bituminous concrete mixes as it being simple and economical. Physical properties of conventional and plastic coated aggregates were compared. The Marshall method of mix design was adopted using VG-10 grade bitumen for conventional aggregates and plastic coated aggregates (PCA). Marshall Specimens were prepared at bitumen content ranging from 4% to 6% with a increment of 0.5% by weight of aggregates and with waste plastic content of 5%, 7%, 9%, 11%, 13% and 15% by weight of optimum bitumen content. Marshal stability, Flow value, Air voids (Vv), Voids in mineral aggregates (VMA), and Voids filled with bitumen(VFB) were determined and compared with conventional aggregates (without plastic) bituminous concrete mixes. It was found that there was a reduction in consumption of bitumen in bituminous concrete mix by use of plastic coated aggregates also a considerable improvement in the properties of aggregates and bituminous concrete mix leading to provide longer life and improved pavement performance.

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Behaviour of Bituminous Concrete Mixes with addition of Waste Plastic Bottle via Dry Process

International Journal of Innovative Technology and Exploring Engineering - Special Issue ◽

10.35940/ijitee.b7834.129219 ◽

2019 ◽

Vol 9 (2) ◽

pp. 732-736

Keyword(s):

Mechanical Properties ◽

Research Work ◽

Waste Plastic ◽

Dry Process ◽

Plastic Bottle ◽

Concrete Mix ◽

Bitumen Content ◽

Bituminous Pavements ◽

Plastic Content ◽

Bituminous Concrete

The research work was carried out to investigate the behaviour of bituminous concrete mix with addition of waste plastic bottles made up of Polyethylene Terephthalate (PET) via dry process. Marshall moulds were prepared with bitumen content 5.0 to 5.8% (with 0.2% increment) and waste plastic content 0%, 4%, 6%, 8%, 10%, 12% and 14 % by weight of bitumen. Mechanical properties required for an ideal mix were determined. Results show that with increase in quantity of PET, mechanical properties of bituminous concrete mixes improve initially up to certain extent. The optimum bitumen content for conventional mixes was found to be 5.66%. Modified mix of 8% PET content with 5.40% bitumen content fulfils the requirements of modified mixes as per IRC SP-98, 2013 specifications. Bitumen content reduced to be 4.59% with addition of waste plastic bottle in bituminous concrete mixes. Hence, application of plastic waste in bituminous pavements is environmental friendly solution in terms of disposal of non-biodegradable waste plastic along with improvement in mechanical properties of bituminous mixes

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Effect of using Fibre on the Durability of Asphalt Pavement

Civil Engineering Journal ◽

10.28991/cej-2016-00000013 ◽

2016 ◽

Vol 2 (2) ◽

pp. 63-72 ◽

Cited By ~ 8

Author(s):

Ali Akbari Motlagh ◽

Ebrahim Mirzaei

Keyword(s):

Rheological Properties ◽

Asphalt Concrete ◽

Asphalt Pavement ◽

Tensile Tests ◽

Concrete Mixture ◽

Moisture Susceptibility ◽

Air Voids ◽

Bitumen Content ◽

Indirect Tensile ◽

Stiffening Effect

Using the fibre additives with a uniform distribution in asphaltic concrete mixture is a well-known technique for improving the mechanical properties and durability of asphalt pavement. The purpose of this study is to investigate the effect of preparing fibre and production of the properties of bitumen and asphalt concrete mixture. In this study, a dense-graded aggregation, mineral fibres (asbestos) and synthetic fibres (polyester and nylon) were used. Laboratory studies were done by comparing different rheological properties, mechanical and moisture susceptibility of mixtures of fibres. Results of the penetration and softening point on mixtures of bitumen – fibre show that fibres improve the mixed rheological properties and stiffening effect of fibre properties. The results of Marshall Tests indicate that adding fibres reduces the strength in Marshall and results in the slight increase in the percentage of optimum bitumen content and asphalt percentage of air voids in comparison with typical fibre. The results of the indirect tensile tests showed that the addition of fibres, depending on the percentage of fibres significantly improves the durability of the mixture.

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Utilization of white cement bypass dust as filler in asphalt concrete mixtures

Canadian Journal of Civil Engineering ◽

10.1139/l08-124 ◽

2009 ◽

Vol 36 (2) ◽

pp. 191-195 ◽

Cited By ~ 4

Author(s):

Khaled Z. Ramadan ◽

Ahmed M. Ashteyat

Keyword(s):

Asphalt Concrete ◽

Mineral Filler ◽

Air Voids ◽

Concrete Mixtures ◽

Concrete Properties ◽

White Cement ◽

Bitumen Content ◽

Negative Effect ◽

Asphalt Paving ◽

Mineral Aggregates

This research was carried out to investigate potential reuses of white cement bypass dust (WCBPD) in the Hashemite Kingdom of Jordan. For this purpose, five different asphalt concrete mixtures were prepared using lime mineral filler (control), 2%, 4%, 6%, and 8% WCBPD substitution for lime mineral filler (LMF). The mixtures were subjected to Marshall testing. Results indicated that the substitution of 2% WCBPD for LMF essentially produced almost the same optimum bitumen content (OBC) as the control mixtures (5.5% by weight of aggregate). The substitution of 4% WCBPD slightly increased the OBC to 5.7% by weight of aggregate without any significant negative effect on asphalt concrete properties (stability, flow, voids in mineral aggregates (VMA), and percent of air voids (Pav)). However, further increase in the substitution ratios (6% and 8%) WCBPD was associated with an increase in the OBC to 6.1% and 6.2%, respectively, which makes them uneconomical mixtures. Thus, 4% WCBPD substitution for LMF would be the optimum used in asphalt paving mixtures.

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Optimization of the Bitumen Content of a Basaltic Semi-Granular Bituminous Concrete

Open Journal of Civil Engineering ◽

10.4236/ojce.2018.84032 ◽

2018 ◽

Vol 08 (04) ◽

pp. 460-472

Author(s):

Souleymane Mbengue ◽

Djibril Sow ◽

Ibrahima Khalil Cisse

Keyword(s):

Bitumen Content ◽

Bituminous Concrete

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Study on Plastic Coated Overburnt Brick Aggregate as an Alternative Material for Bituminous Road Construction

Advances in Materials Science and Engineering ◽

10.1155/2016/5352787 ◽

2016 ◽

Vol 2016 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Dipankar Sarkar ◽

Manish Pal ◽

Ashoke K. Sarkar

Keyword(s):

Fatigue Life ◽

Road Construction ◽

Mix Design ◽

Waste Plastics ◽

Test Results ◽

Bitumen Content ◽

Alternative Material ◽

Constructional Work ◽

Marshall Stability ◽

Bituminous Concrete

There are different places in India where natural stone aggregates are not available for constructional work. Plastic coated OBBA can solve the problem of shortage of stone aggregate to some extent. The engineers are always encouraged to use locally available materials. The present investigation is carried out to evaluate the plastic coated OBBA as an alternative material for bituminous road construction. Shredded waste plastics are mixed with OBBA in different percentages as 0.38, 0.42, 0.46, 0.50, 0.54, and 0.60 of the weight of brick aggregates. Marshall Method of mix design is carried out to find the optimum bitumen content of such bituminous concrete mix prepared by plastic coated OBBA. Bulk density, Marshall Stability, flow, Marshall Quotient, ITS, TSR, stripping, fatigue life, and deformations have been determined accordingly. Marshall Stability value of 0.54 percent of plastic mix is comparatively higher than the other mixes except 0.60 percent of plastic mix. Test results are within the prescribed limit for 0.54 percent of plastic mix. There is a significant reduction in rutting characteristics of the same plastic mix. The fatigue life of the mix is also significantly higher. Thus plastic coated OBBA is found suitable in construction of bituminous concrete road.

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