Laboratory Study on Mechanical Parameters of Foamed Bitumen Mixtures in the Cold Recycling Technology

Iwański, Marek; Chomicz-Kowalska, Anna

doi:10.1016/j.proeng.2013.04.056

Cited by 49 publications

(36 citation statements)

References 9 publications

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“…Its role is to control the bitumen emulsion breaking time in the Emulsion-Mix [17], ensure uniform dispersion of the foam in the Foam-Mix and improve the strength and resistance to moisture damage parameters of the recycled materials [6,7].…”

Section: Binding Agentsmentioning

confidence: 99%

“…The content of the used binding materials was established based on the authors' experience [6,7,16]. The total amount of the bitumen binder in the recycled mixes was 5.5%, which complied with the recommendations [9,15], where the combined content of the old (derived from the RAP) and the new binder (for the Emulsion-Mix, the new binder is the bitumen after the emulsion break-up) should not exceed 6.0% (m/m) for mixes with 0/31.5 mm gradation.…”

Section: Design Procedurementioning

confidence: 99%

“…National and foreign experiences [7,[21][22][23] indicate that stiffness moduli values decrease with increasing test temperatures. According to German recommendations [18] concerning cold mix base course with foamed bitumen composed of RAP and crushed-stone aggregate (50/50), the value of ITSM at a temperature of 25…”

Section: Evaluation Of the Pavement Performancementioning

confidence: 99%

“…Although cold mix recycling with mineral-cementemulsion (MCE) is the most popular pavement construction technology in Poland, the research carried out at the Kielce University of Technology showed that mixtures with foamed bitumen provide better durability of the road structure under aggressive traffic loads and unfavourable climatic conditions [6][7][8]. What is more, thanks to the small amount of water (2-3%) contained in foamed bitumen, the base course reaches the required strength parameters quite quickly, which, compared with the bitumen emulsion mix technology, decreases the necessary curing time.…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the pavement performance

Iwański¹,

Chomicz-Kowalska²

2015

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. This paper focuses on evaluation of two laboratory-based methods of compaction of foamed bitumen and bitumen emulsion mixes: impact compaction with a Marshall hammer and static compaction using a hydraulic press. The investigated compaction methods were assessed in terms of their impact on the physical and mechanical properties of produced laboratory specimens, including: air void content, indirect tensile strength before and after conditioning in water (ITSdry, ITSwet), tensile strength ratio (TSR), and indirect tensile stiffness modulus (ITSM) at 0• C, 10• C and 20• C. The statically compacted specimens attained higher levels of mechanical properties and resistance to moisture damage, which was associated with a lower content of air voids in the specimens formed using a hydraulic press. Authors present a calculation showing that a mechanistic design based on the laboratory static press compaction method leads to overestimation of fatigue cracking resistance of the road base.

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Section: Binding Agentsmentioning

confidence: 99%

Section: Design Procedurementioning

confidence: 99%

Section: Evaluation Of the Pavement Performancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluation of the pavement performance

Iwański¹,

Chomicz-Kowalska²

2015

Bulletin of the Polish Academy of Sciences Technical Sciences

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“…The cyclic load program was taken as a simulation of the operating load caused by passing vehicles according to the durability tests of the bituminous pavements [20].…”

Section: Test Programme and Executionmentioning

confidence: 99%

Analysis of the microcracking process with the Acoustic Emission method with respect to the service life of reinforced concrete structures with the example of the RC beams

Goszczyńska¹,

Świt²,

Trąmpczyński³

2015

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. The study presents the analysis of the process of crack formation and crack width growth in statically determinate and hyperstatic reinforced concrete beams with the IADP acoustic emission method. The beams were subjected to the monotonic, variable with unloading, and variable cyclic loading schemes. The criteria of structural damage were established to account for the structure durability.

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