Use of Life Cycle Cost Analysis and Multiple Criteria Decision Aid Tools for Designing Road Vertical Profiles

Loulizi, Amara; Bichiou, Youssef; Rakha, Hesham A.

doi:10.3390/su11247127

Cited by 3 publications

(2 citation statements)

References 15 publications

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“…LCCA is an economic analysis tool, which can reveal whether or not a technically sound optimal alternative could not be optimal concerning expenditure aspects (Loulizi et al, 2019). It is based on an analytical technique taking into account costs relevant to the sponsoring agency, owner, facility operator, and roadway user for a given analysis period.…”

Section: Life Cycle Cost Analysis (Lcca)mentioning

confidence: 99%

Anti-aging additives: proposed evaluation process based on literature review

Camargo

Dhia

Loulizi

et al. 2021

Road Materials and Pavement Design

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Asphalt binder ageing alters its chemical and physical properties in a manner to make it brittle and more susceptible to thermal and fatigue cracking. The ageing rate of asphalt binders depends on a combination of different factors related to their chemical composition, environmental conditions and mix design. In order to prevent ageing, anti-ageing additives are used. The selection of the optimal additive should follow an iterative process. The additive choice is made concerning each case studied. Then, the selected modified asphalt binder is short-term aged by RTFOT and long-term aged by PAV and ultraviolet (UV) weathering. Rheology performance parameters are measured by DSR and BBR before and after ageing. Consequently, ageing indices are calculated to evaluate the appropriateness of the additive. The paper discusses several findings on the rheological level accordingly to the literature. Finally, a process is proposed to harmonise the research and the engineering practices in studying anti-ageing additives effects on asphalt binders.

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Section: Life Cycle Cost Analysis (Lcca)mentioning

confidence: 99%

Anti-aging additives: proposed evaluation process based on literature review

Camargo

Dhia

Loulizi

et al. 2021

Road Materials and Pavement Design

Self Cite

View full text Add to dashboard Cite

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“…These prices are affected by future economic development and, therefore, may be difficult to predict (Loulizi, Bichiou & Rakha, 2019). The LCC of real projects can also be affected by the contract type.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Road Construction Projects Price Changes in the Selected Phases of their Life-Cycle

Korytářová

Hanák

2022

srees

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This paper deals with an analysis of causes that lead to the change in price (value of construction costs) of road infrastructure projects in selected phases of the building structure life-cycle, more specifically procurement and construction phases, with the aim to refine the price estimation in the Estimated Value determination phase. The sample of regional road construction projects in the South Moravian Region (Czech Republic) documentation forms the basis for the research. The methodological procedure is aimed at monitoring changes in the value of construction costs during the preparation and implementation phase of the construction. Estimated values, contract prices and actual prices of individual projects are compared to determine them and the reasons for their differences are discussed. The changes (decrease) in the values of construction costs determined by estimated value and contract price show the strong influence of the construction market and the interest of construction companies in the implementation of public works contracts in the field of road infrastructure projects. The relative differences range up to 47%. The changes (increase) in construction costs determined by contract price and actual price are much lower, up to 13%, and result from specific situations during the implementation of the construction, for which subsoil bearing capacity problems and material changes were determined as the most significant.

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Estimation of Vehicle Carbon Emissions in China Accounting for Vertical Curve Effects

Dong

2020

Mathematical Problems in Engineering

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Predicting vehicle carbon emissions on vertical curve sections can provide guidance for low-carbon vertical profile designs. Given that the influence of vertical curve design indicators on the fuel consumption and CO2 emissions of vehicles are underexplored, this study filled this research gap by establishing a theoretical carbon emission model of vehicles on vertical curve sections. The carbon emission model was established based on Xu’s vehicle energy conversion model, the conversion model of energy, fuel consumption, and CO2 emissions. The accuracy of the theoretical carbon emission model and the CO2 emission rules on vertical curve sections were verified by field test results. Field tests were carried out on flat sections, longitudinal slope sections, and various types of vertical curve sections, with five common types of vehicles maintaining cruising speed. The carbon emission rate effects on the vertical curve are closely related to the gradient and irrelevant of the radius. On the vertical profile composed with downhill/asymmetric/symmetrical vertical curve with a gradient greater than the balance gradient, the carbon emission rate is determined by the gradient and radius. The influence of the gradient on carbon emissions of vehicle on these vertical profiles was more significant than the radius. The radius is irrelevant to the carbon emission rate on the other forms of vertical profile. These results may benefit highway designers and engineers by providing guidelines regarding the environmental effects of highway vertical curve indexes.

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Use of Life Cycle Cost Analysis and Multiple Criteria Decision Aid Tools for Designing Road Vertical Profiles

Cited by 3 publications

References 15 publications

Anti-aging additives: proposed evaluation process based on literature review

Anti-aging additives: proposed evaluation process based on literature review

Analysis of Road Construction Projects Price Changes in the Selected Phases of their Life-Cycle

Estimation of Vehicle Carbon Emissions in China Accounting for Vertical Curve Effects

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