Central government role in road infrastructure development and economic growth in the form of future study: the case of Indonesia

Nawir, Daud; Bakri, Muhammad Djaya; Syarif, Iif Ahmad

doi:10.1186/s40410-022-00188-9

Cited by 8 publications

(2 citation statements)

References 43 publications

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“…An important indicator of economic growth and prosperity is the development of a nation's road infrastructure (Nawir et al, 2023). Higher-performance asphalt mixes are required because of increased tra c and environmental concerns.…”

Section: Introductionmentioning

confidence: 99%

Sustainable Pavement Materials: Evaluating the Effects of Biochar on Stone Matrix Asphalt and Bituminous Concrete Mix Designs

PENKI,

Rout,

Das

2024

Preprint

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This study looks into the mix design process for Stone Matrix Asphalt (SMA) and Bituminous Concrete (BC) in compliance with IRC: SP: 79-2008 and MoRT&H-2013 requirements. In comparison to standard dense and open-graded asphalt mixes, SMA has a better structure characterized by gap-graded aggregate, mastic, and fiber. The study uses coconut shell biochar as a filler in both SMA and BC, acting as a carbon-neutral and sequestration material. Using gap-graded aggregates, the study applies STAB (Simple Tool for Aggregate Blending) software for aggregate blending to establish ideal amounts. Following confirmation of the blends using Bailey's gradation technique, the Optimum Bitumen Content (OBC) is calculated using the Marshall method. The initial bitumen concentration is 4% for BC and 6% for SMA, with 0.5% increases up to 7%. Theoretical specific gravity is determined at 6% for the loose mix using ASTM D 2041. Gse is then computed, with OBC set at 6% for SMA and 4.2% for BC, meeting a 4% average air voids criteria among other volumetric parameters. At the appropriate bitumen percentage, all blends are subjected to a variety of tests, including indirect tensile strength, rutting, and resilient modulus. The study replicates moisture resistance deterioration by freezing, thawing, and humidifying materials. The number of blows used to compute refusal density ranges from 25 to 150. ITS determined retained tensile strength to be 93.88% and 98.8% for freezing and thawing BC samples and 93.88% and 98.8% for humidity-conditioned BC samples, respectively. The equivalent figures for SMA are 84% and 89%. Proportional rut depth and wheel tracking speed measurements are given for freezing, humidity, and unconditional samples, and robust modulus values are also supplied. Refusal density air voids that do not decrease below 4% up to 100 blows for BC are within the specified range of 3-5%. This extensive laboratory investigation demonstrates the feasibility of using biochar as a filler in bituminous concrete and stone matrix asphalt. This sustainable method helps eco-friendly and long-lasting road construction practices in addition to improving the durability and performance of highways.

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Section: Introductionmentioning

confidence: 99%

Sustainable Pavement Materials: Evaluating the Effects of Biochar on Stone Matrix Asphalt and Bituminous Concrete Mix Designs

PENKI,

Rout,

Das

2024

Preprint

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“…),Munir et al (2018),Messakh et al (2022), andNawir et al (2023) suggests that the presence of road infrastructure yields positive effects on the economic growth of a certain region. The extent of road infrastructure given area directly influences the level of connectivity and accessibility between locations.…”

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confidence: 99%

Human Capital and Regional Economic Growth in Indonesia: A Spatial Analysis Approach

Windhani,

Purwaningsih,

Mulyaningsih

et al. 2023

IJG

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Endogenous growth theory assumes that human capital is a prominent factor in regional economic growth. However, the imbalance of human capital between regions is still a major problem in economic growth in Indonesia. Previous studies on regional economic growth have recognized the importance of considering spatial aspects as a determinant of regional economic growth. The geographical area in the form of an archipelago with a large number of administrative districts and cities produces pros and cons regarding the influence of spatial aspects on the regional growth of urban districts. This study aims to analyze the distribution of human capital using the Alternative Human Development Index (AHDI) approach and the effect of human capital and spatial aspects on the regional economic growth of urban districts in Indonesia within the framework of endogenous growth theory. The research method uses geometric mean to measure the Alternative Human Development Index, Geographic Information System (GIS) to see the distribution of human capital and regional economic growth in Indonesia, and the spatial regression Spatial Autoregressive Moving Average (SARMA) used to analyze the spatial aspects of human capital and regional economic growth in Indonesia. The results show that human capital in Indonesia is still unequal between the western and eastern parts of Indonesia. Human capital and spatial factors have positive effects and are the most influential determinants of Indonesia's regional economic growth, as indicated by the value of the spatial lag weight matrix of the dependent variable (ρ) and the spatial error term (λ) that is positive.

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Road traffic facilities, traffic accidents, and poverty: Lesson learned from Indonesia

Hermawan,

Mulya Firdausy,

Rizqy Rambe

et al. 2024

Transportation Research Interdisciplinary Perspectives

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Central government role in road infrastructure development and economic growth in the form of future study: the case of Indonesia

Cited by 8 publications

References 43 publications

Sustainable Pavement Materials: Evaluating the Effects of Biochar on Stone Matrix Asphalt and Bituminous Concrete Mix Designs

Sustainable Pavement Materials: Evaluating the Effects of Biochar on Stone Matrix Asphalt and Bituminous Concrete Mix Designs

Human Capital and Regional Economic Growth in Indonesia: A Spatial Analysis Approach

Road traffic facilities, traffic accidents, and poverty: Lesson learned from Indonesia

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