Flexural Fatigue Behavior of Steel Fiber-Reinforced Reclaimed Asphalt Pavement–Based Concrete: An Experimental Study

Preparation of Hot mix asphalt (HMA) pavement construction of pavement layers involves in release of harmful gases which affects the environment conditions. The use of natural aggregates for the preparation of HMA is also affecting the natural resources. WMA is one among the technologies for reduction in mixing and compaction temperature RAP has the advantages for the use in partial replacement with natural aggregates in preparation of modified bituminous mix. In this study, it was investigated on usage of polypropylene fibres of 6mm length in Warm mix asphalt with recycled aggregates. For modification of base binder, Sasobit wax compound was added so as to improve the reduce the overall energy consumption and reduction in toxic emission during construction of pavement. The specimens were prepared under analytical gradation method. The main objective of this paper is incorporate the principle of sustainability in pavement construction by the usage of RAP with the inclusion of fibre at four different percentages with an interval 0.1 to know the performance of RAP modified mixtures. In this study, physical properties as well as ageing properties were performed on virgin, modified and RAP binder, specimens were produced for Marshall, Indirect tensile strength (IDT) to determine the moisture susceptibility and volumetric properties. The modified rap mix of 3% WMA of 15% RAP with 0.2% PP fibre and 0.3% rejuvenator, the above mix combination values obtained results has displayed better performance evaluation for moisture resistance with the inclusion of fibre in modified RAP mixes. This study shall provide direction for achieving environmentally friendly pavement technologies.

Section: Materials and Methodologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Laboratory evaluation of RAP modified mixtures for moisture susceptibility

Durgaakshitha¹,

Adepu²

2022

“…Yeswanth Paluri et al [10] (2021) were investigated on, "Flexural Fatigue Behavior of Steel Fiber-Reinforced Reclaimed Asphalt Pavement-Based Concrete: An Experimental Study".The results indicated that a decrease in flexural fatigue life with an increase in the RAP (Reclaimed Asphalt Pavement) content at all the stress levels. There is a substantial enhancement in fatigue life when steel fibers are added to RAP based concrete.…”

Section: Literature Reviewmentioning

confidence: 99%

Creep Strain Behaviour of Triple-Blended Steel Fiber Self-Compacting Concrete

Setti

Kumar

Swami³

2022

The objective of the research article is to present the experimental results on the creep strain behaviour of steel fiber Self-Compacting Concrete (SFSCC). In respect of binder content, aggregate size, fine-to-coarse aggregate ratio, water-to-cement ratio, and chemical admixtures, Self-Compacting Concrete (SCC) differentiates from conventional cement concrete. Steel fibers are also inserted into SCC at a predetermined percentage to reinforce it. Steel fibers have been shown to contribute to improved strength characteristics, a dense mass of concrete with little or no voids, reduced pores in concrete, a higher Young’s modulus, and fewer deflections and strains in concrete. Hence, an investigation was conducted on the creep variation of SFSCC over a longer duration. The test approach follows ASTM C512’s standard test method for concrete creep in compression. The test specimens (SFSCC) are standard cylinders that have been cast and cured for 28 days before being tested. Three SFSCC cylinders with 0.80% steel fiber were tested at the same time. The load is applied to just the cylinders in the loading frame and kept constant, producing constant stress. The strains that occur only due to creep, excluding the initial elastic strain, are digitally recorded. As a logarithmic function, the creep strain-time connection was established. The conclusions are observed based on the findings of the experiments and compared with normal cement concrete (NCC).

“…Bituminous mixtures become more rigid when RAP is added to the pavement bound layers. Recycled materials have been shown in prior research to be moisture resistant [35]. The utilization of RAP material reduces the amount of asphalt used.…”

Section: Reclaimed Asphalt Pavement In Bound Layersmentioning

confidence: 99%

The study on potential use of RAP in WMA pavement layers with the inclusion of Basalt Fibers for the effect of mechanical and moisture Performance

Mamatha¹,

Adepu²

2022

Pavement engineers are facing difficulties for optimizing the use of natural resources and minimizing the consumption fuel involved in the manufacturing process of Hot Mix Asphalt (HMA). As a matter of fact the preparation of HMA involves in the release of harmful gases and to prevent, researches are working towards improving the environmental effects. Warm mix asphalt (WMA) is one of the solutions to increase the pavement performance with a concern to environmental effects that has gained a lot of popularity. In the present study, laboratory investigations were carried for the evaluation of laboratory prepared WMA mixes containing Reclaimed Asphalt Pavements (RAP) and with the inclusion of fiber at different proportion. This method of mix modification will not only lower the energy consumption but also reduce the release of harmful gases as observed in HMA mix proportions. Nevertheless the above mix combinations are intended to achieve sustainable pavement construction practices. The purpose of this research is to look into the effect of using RAP in modified mixes on mechanical and durability proportions in order to evaluate the effect of partial replacement of BC grade-2 WMA mixtures.. In this work, the effectiveness of basalt fibre modified bitumen mixtures was also examined using fibre in various amounts. Compaction test on binder modification, moisture damage, indirect tensile strength tests, and Marshall test effects on RAP, WMA mixes were used to assess the performance of binder modification, RAP, and fibre modified mixes. The laboratory test results indicated that the asphaltene proportions were shown better results at 3%WMA binder prepared with sasobit, a wax compound. The WMA asphalt mix prepared with RAP at 20% and with 0.6% of basalt fiber has provided better performance compared with the WMA mixes alone. This will certainly minimize the environmental effects through energy reduction and improved mechanical properties along with the durability performance.