Solomon Sackey
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Solomon Sackey has a total of 4 co-authors. Here are the top co-authors by number of shared publications:
- Byung-Soo Kim
Department of Civil Engineering, School of Construction, Environmental, and Energy Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
6 shared publications - Dong-Eun Lee
School of Architecture, Civil, Environmental and Energy Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea
2 shared publications - G C Choi
Department of Civil Engineering, Kyungpook National University, 80 daehakro Bukgu, Daegu, Korea
1 shared publication - Joon-Soo Kim
Intelligent Construction Automation Center, Kyungpook National University, Daegu 41566, Korea
1 shared publication
Latest Publications
- Open Access
- 12 February 2020
- Published by Elsevier in KSCE Journal of Civil Engineering
- Vol. 24 (3) , 693-702
Duration Estimate at Completion: Improving Earned Value Management Forecasting Accuracy
- 12 February 2020
- Published by Elsevier in KSCE Journal of Civil Engineering
- Vol. 24 (3) , 693-702
Open AccessDuration Estimate at Completion: Improving Earned Value Management Forecasting Accuracy
- Open Access
- 29 March 2019
- Published by MDPI AG in Applied Sciences
- Vol. 9 (7) , 1315
Life Cycle Assessment for the Production Phase of Nano-Silica-Modified Asphalt Mixtures
To combat the rutting effect and other distresses in asphalt concrete pavement, certain modifiers and additives have been developed to modify the asphalt mixture to improve its performance. Although few additives exist, nanomaterials have recently attracted significant attention from the pavement industry. Several experimental studies have shown that the use of nanomaterials to modify asphalt binder results in an improved oxidative aging property, increased resistance to the rutting effect, and improves the rheological properties of the asphalt mixture. However, despite the numerous benefits of using nanomaterials in asphalt binders and materials, there are various uncertainties regarding the environmental impacts of nano-modified asphalt mixtures (NMAM). Therefore, this study assessed a Nano-Silica-Modified Asphalt Mixtures in terms of materials production emissions through the Life Cycle Assessment methodology (LCA), and the results were compared to a conventional asphalt mixture to understand the impact contribution of nano-silica in asphalt mixtures. To be able to compare the relative significance of each impact category, the normalized score for each impact category was calculated using the impact scores and the normalization factors. The results showed that NMAM had a global warming potential of 7.44563 × 103 kg CO2-Eq per functional unit (FU) compared to 7.41900 × 103 kg CO2-Eq per functional unit of the conventional asphalt mixture. The application of LCA to NMAM has the potential to guide decision-makers on the selection of pavement modification additives to realize the benefits of using nanomaterials in pavements while avoiding potential environmental risks.
- 29 March 2019
- Published by MDPI AG in Applied Sciences
- Vol. 9 (7) , 1315
Open AccessLife Cycle Assessment for the Production Phase of Nano-Silica-Modified Asphalt Mixtures
To combat the rutting effect and other distresses in asphalt concrete pavement, certain modifiers and additives have been developed to modify the asphalt mixture to improve its performance. Although few additives exist, nanomaterials have recently attracted significant attention from the pavement industry. Several experimental studies have shown that the use of nanomaterials to modify asphalt binder results in an improved oxidative aging property, increased resistance to the rutting effect, and improves the rheological properties of the asphalt mixture. However, despite the numerous benefits of using nanomaterials in asphalt binders and materials, there are various uncertainties regarding the environmental impacts of nano-modified asphalt mixtures (NMAM). Therefore, this study assessed a Nano-Silica-Modified Asphalt Mixtures in terms of materials production emissions through the Life Cycle Assessment methodology (LCA), and the results were compared to a conventional asphalt mixture to understand the impact contribution of nano-silica in asphalt mixtures. To be able to compare the relative significance of each impact category, the normalized score for each impact category was calculated using the impact scores and the normalization factors. The results showed that NMAM had a global warming potential of 7.44563 × 103 kg CO2-Eq per functional unit (FU) compared to 7.41900 × 103 kg CO2-Eq per functional unit of the conventional asphalt mixture. The application of LCA to NMAM has the potential to guide decision-makers on the selection of pavement modification additives to realize the benefits of using nanomaterials in pavements while avoiding potential environmental risks.
- Open Access
- 14 January 2019
- Published by Elsevier in KSCE Journal of Civil Engineering
- Vol. 23 (4) , 1484-1492
Schedule Risk Analysis using a Proposed Modified Variance and Mean of the Original Program Evaluation and Review Technique Model
- 14 January 2019
- Published by Elsevier in KSCE Journal of Civil Engineering
- Vol. 23 (4) , 1484-1492
Open AccessSchedule Risk Analysis using a Proposed Modified Variance and Mean of the Original Program Evaluation and Review Technique Model
- Open Access
- 1 November 2018
- Published by American Society of Civil Engineers (ASCE) in Journal of Construction Engineering and Management
- Vol. 144 (11)
Environmental and Economic Performance of Asphalt Shingle and Clay Tile Roofing Sheets Using Life Cycle Assessment Approach and TOPSIS
The construction industry utilizes many materials that go through different manufacturing and transportation processes. Selecting and using environmentally friendly or green building materials is one way to reduce the inimical environmental effects associated with the construction industry. However, environmental preference cannot be used as the only criterion in selecting a building material. As cost is an important factor, environmental performance needs to be balanced against the economic performance. The decisions on material selection, therefore, need improvement. This study analyzed and compared the environmental and economic performance of asphalt shingle and clay tile roofing materials using the building for environmental and economic sustainability (BEES) model. The results were then used to develop a combined performance score using the technique for order preference by similarity to ideal solution (TOPSIS) to assist decisions pertaining to the selection of the best material based on the performance score. To present another decision criteria to compare and select a roof material, the study utilized the contingent valuation method (CVM) to estimate the environmental cost associated with these alternative materials. The simulation results showed that clay tile had a better environmental performance score of compared to the score of for asphalt shingles; however, asphalt shingles had a better overall performance score of 0.5985 pts against 0.4153 pts for the clay tile. Merging environmental and economic considerations to a common score as presented in this study will help improve and contribute to the quality of decision making in that it provides a substantial basis to select the most suitable, cost-effective roofing material.- 1 November 2018
- Published by American Society of Civil Engineers (ASCE) in Journal of Construction Engineering and Management
- Vol. 144 (11)
Open AccessEnvironmental and Economic Performance of Asphalt Shingle and Clay Tile Roofing Sheets Using Life Cycle Assessment Approach and TOPSIS
The construction industry utilizes many materials that go through different manufacturing and transportation processes. Selecting and using environmentally friendly or green building materials is one way to reduce the inimical environmental effects associated with the construction industry. However, environmental preference cannot be used as the only criterion in selecting a building material. As cost is an important factor, environmental performance needs to be balanced against the economic performance. The decisions on material selection, therefore, need improvement. This study analyzed and compared the environmental and economic performance of asphalt shingle and clay tile roofing materials using the building for environmental and economic sustainability (BEES) model. The results were then used to develop a combined performance score using the technique for order preference by similarity to ideal solution (TOPSIS) to assist decisions pertaining to the selection of the best material based on the performance score. To present another decision criteria to compare and select a roof material, the study utilized the contingent valuation method (CVM) to estimate the environmental cost associated with these alternative materials. The simulation results showed that clay tile had a better environmental performance score of compared to the score of for asphalt shingles; however, asphalt shingles had a better overall performance score of 0.5985 pts against 0.4153 pts for the clay tile. Merging environmental and economic considerations to a common score as presented in this study will help improve and contribute to the quality of decision making in that it provides a substantial basis to select the most suitable, cost-effective roofing material. - Open Access
- 30 June 2018
- Published by Elsevier in KSCE Journal of Civil Engineering
- Vol. 22 (11) , 4205-4214
Development of an Expert System Tool for the Selection of Procurement System in Large-Scale Construction Projects (ESCONPROCS)
- 30 June 2018
- Published by Elsevier in KSCE Journal of Civil Engineering
- Vol. 22 (11) , 4205-4214
Open AccessDevelopment of an Expert System Tool for the Selection of Procurement System in Large-Scale Construction Projects (ESCONPROCS)
- Open Access
- 21 June 2018
- Published by IOP Publishing in IOP Conference Series: Earth and Environmental Science
- Vol. 164 (1) , 012032
The Environmental Load Characteristic Analysis of LCA-based IPC Girder Bridge
The carbon emission amount of the Republic of Korea ranks 8th in the world including China and the US and accordingly, the government announced its emission reduction plan by 37% compared to BAU (8.51 million tons) by 2030. As a result of the emission trading scheme that has been implemented since 2015, efforts are being made to reduce environmental load. Accordingly, this study analyzed the material-specific environmental load distribution and environmental impact category for 60 IPC girder bridges of national road constructions in Korea by utilizing the life cycle assessment (LCA) method. The analysis result was found to be in the order of ready-mixed concrete (RMC) (64.00%), rebar (9.1%), timber (7.8%) and plywood (5.6%). As for environmental impact category-specific result, it was found to be in the order of global warming (50.60%), abiotic resource depletion (32.20%), photochemical oxidant creation (POC) (10.10%) and human toxicity (HT) (7.10%), thereby considered to be helpful when selecting the form of bridge while considering environmental load during the planning and design phases.
- 21 June 2018
- Published by IOP Publishing in IOP Conference Series: Earth and Environmental Science
- Vol. 164 (1) , 012032
Open AccessThe Environmental Load Characteristic Analysis of LCA-based IPC Girder Bridge
The carbon emission amount of the Republic of Korea ranks 8th in the world including China and the US and accordingly, the government announced its emission reduction plan by 37% compared to BAU (8.51 million tons) by 2030. As a result of the emission trading scheme that has been implemented since 2015, efforts are being made to reduce environmental load. Accordingly, this study analyzed the material-specific environmental load distribution and environmental impact category for 60 IPC girder bridges of national road constructions in Korea by utilizing the life cycle assessment (LCA) method. The analysis result was found to be in the order of ready-mixed concrete (RMC) (64.00%), rebar (9.1%), timber (7.8%) and plywood (5.6%). As for environmental impact category-specific result, it was found to be in the order of global warming (50.60%), abiotic resource depletion (32.20%), photochemical oxidant creation (POC) (10.10%) and human toxicity (HT) (7.10%), thereby considered to be helpful when selecting the form of bridge while considering environmental load during the planning and design phases.