Strength Assessment of Cement Treated Soil-Reclaimed Asphalt Pavement (Rap) Mixture

Suebsuk, Jirayut

doi:10.21660/2014.12.3262

Cited by 6 publications

(5 citation statements)

References 13 publications

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“…Many studies have been carried out on the possible use of RAP to improve the physical and geotechnical properties of deficient soils. Suebsuk et al (2014) studied the effect of RAP on the compaction characteristics and unconfined compressive strength (UCS) of cement-treated soil -RAP mixtures. They adopted porosity as a state parameter for assessing the strength of the mixed material.…”

Section: Introductionmentioning

confidence: 99%

Effect of Reclaimed Asphalt Pavement Stabilization on the Microstructure and Strength of Black Cotton Soil

Alhaji¹,

Alhassan²

2018

IJTech

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Black Cotton Soil (BCS) collected from Guyuk, Adamawa State-Northeastern Nigeria, was treated with 0 to 100% Reclaimed Asphalt Pavement (RAP) in 10% steps to evaluate the microstructure and strength of the compacted mixtures. The index property results show that the BCS and RAP are classified under clay of high plasticity (CH) and poorly graded sand (SP) respectively, according to the Unified Soil Classification System (USCS). An extraction test gave a RAP bitumen content of 5.99%, which is within the value of 5-6% recommended in the literature. An x-ray diffraction test carried out on both the BCS and RAP showed that the BCS predominantly consisted of quartz, microcline, albite and kaolinite, which is similar to the results obtained in the literature, while the RAP, however, consisted of quartz, albite, orthoclase, phylogopite and actinolite, which is slightly different to what is reported in the literature, probably due to the source of the bitumen. The results of compaction, at a modified energy level, conducted on the mixtures, show that the Maximum Dry Density (MDD) increased from 1.890 to 2.034 mg/m 3 at 30% RAP content, after which the value fell to1.925 mg/m 3 at 100% RAP content. The Optimum Moisture Content (OMC) however, decreased from 13.7% at 0% RAP, to 8.8% at between 40-60% RAP content, after which the value increased marginally to 9.5% at 90% RAP. Similar to the MDD, the California Bearing Ratio (CBR) increased from 11% at 0% RAP to a maximum of 35% at 30% RAP content, after which the value fell to 5% at 100% RAP content. 30% RAP is therefore the optimal mixture giving the highest strength and can be used as a sub-base material for roads with light traffic use, according to the Nigerian General Specification for Road and Bridge Works. Hence the 3.07% bitumen obtained for this mixture can be adopted as the fixation point for BCS-RAP mixtures. Durability was found to be far lower than the resistance to loss in strength of 80% suggested in the literature.

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Section: Introductionmentioning

confidence: 99%

Effect of Reclaimed Asphalt Pavement Stabilization on the Microstructure and Strength of Black Cotton Soil

Alhaji¹,

Alhassan²

2018

IJTech

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“…A resilient modulus of 300 MPa was achieved by adding 75% milled material. Suebsuk et al [15] studied the addition of RAP and cement to a lateritic soil composition consisting of 53% sand, 25% silt, 20% clay, and 2% gravel. When assessing the compaction of the soil+RAP mixtures, the mixture with 50% RAP addition achieved the highest dry density, with a value of 21.90 kN/m³, and the lowest optimum moisture content, with a value of 6.40%.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Use of Recycled Asphalt Pavement in Soil Stabilization

Lima,

Arrieta-Baldovino,

Izzo

2023

Civ Eng J

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This study addresses unused recycled asphalt pavement (RAP) incorporated into sedimentary soil from the Guabirotuba Formation in Curitiba, Southern Brazil. Different percentages of RAP, ranging from 0% to 80% by weight, were mixed with the pure soil, with and without the addition of pozzolanic Portland cement. Tests were conducted to evaluate the mixtures' compaction properties, mechanical strength, and expansion after curing for up to 28 days. The results showed that adding RAP improved the mixtures' unconfined compressive strength (qu) and splitting tensile strength (qt). Up to 60% RAP, the qu increased by 260 kPa, and the qt increased by 340 kPa compared to the pure soil. The California Bearing Ratio (CBR) tests demonstrated an 18.62% improvement when 80% RAP was added to the untreated soil. In addition, the RAP also reduced the expansion of the compacted blends, with values decreasing from 1.19% to 0.88% with 80% RAP replacement. The expansion value was further reduced to 0.86% when the cement was added. The cement-soil-RAP compacted blends showed suitability for subgrade reinforcement, meeting the criteria of expansion <1% and CBR> 2%. Additionally, 3% cement and 40% RAP mixtures were suitable as a sub-base layer, with expansion <1% and CBR > 20%. The results provide valuable insights into utilizing RAP as an alternative material in soil improvement techniques employing the novelty porosity-to-cement index. Doi: 10.28991/CEJ-2023-09-09-016 Full Text: PDF

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“…The RAP comes from the construction and rehabilitation of damaged asphalt pavement road. RAP mixture and in-situ pavement recycling base course have been increasingly used during recent years [1][2][3]. due to the substantial saving in cost and conservation of natural aggregate source.…”

Section: Introductionmentioning

confidence: 99%

Compressive Strength and Workability of Cement Mortar Containing Recycled Asphalt Pavement

Suebsuk

Panpipat

2020

KEM

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This article presents the compressive strength and workability of cement mortar (CM) containing recycled asphalt pavement (RAP) as fine aggregate replacement. The effect of the RAP replacement, water to cement ratio, curing time, and aggregate water absorption on compressive strength and flow workability are reported. The results show that the mixing water and mixing time play a significant role in the compressive strength and unit weight of CM containing RAP. The RAP has a higher water absorption and slower rate of water absorption than those of sand. The flow workability of CM increases with RAP replacement due to the unabsorbed water at the initial mixing stage. The main negative factors that affected the compressive strength of CM containing RAP as a fine aggregate replacement are revealed. The unabsorbed water at the initial state of mixing before hardening causes increased flow workability and decreased compressive strength. The findings from this research will promote the mix design approach of CM containing RAP as a fine aggregate replacement, for moving toward increased applications of recycled materials in a sustainable manner in civil engineering construction.

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Strength Assessment of Cement Treated Soil-Reclaimed Asphalt Pavement (Rap) Mixture

Cited by 6 publications

References 13 publications

Effect of Reclaimed Asphalt Pavement Stabilization on the Microstructure and Strength of Black Cotton Soil

Effect of Reclaimed Asphalt Pavement Stabilization on the Microstructure and Strength of Black Cotton Soil

Sustainable Use of Recycled Asphalt Pavement in Soil Stabilization

Compressive Strength and Workability of Cement Mortar Containing Recycled Asphalt Pavement

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