1
|
Dolado JS, Goracci G, Arrese-Igor S, Ayuela A, Torres A, Liberal I, Beruete M, Gaitero JJ, Cagnoni M, Cappelluti F. Radiative Cooling Properties of Portlandite and Tobermorite: Two Cementitious Minerals of Great Relevance in Concrete Science and Technology. ACS APPLIED OPTICAL MATERIALS 2024; 2:1000-1009. [PMID: 38962568 PMCID: PMC11217932 DOI: 10.1021/acsaom.3c00082] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 06/05/2023] [Accepted: 06/05/2023] [Indexed: 07/05/2024]
Abstract
Although concrete and cement-based materials are the most engineered materials employed by mankind, their potential for use in daytime radiative cooling applications has yet to be fully explored. Due to its complex structure, which is composed of multiple phases and textural details, fine-tuning of concrete is impossible without first analyzing its most important ingredients. Here, the radiative cooling properties of Portlandite (Ca(OH)2) and Tobermorite (Ca5Si6O16(OH)2·4H2O) are studied due to their crucial relevance in cement and concrete science and technology. Our findings demonstrate that, in contrast to concrete (which is a strong infrared emitter but a poor sun reflector), both Portlandite and Tobermorite exhibit good radiative cooling capabilities. These results provide solid evidence that, with the correct optimization of composition and porosity, concrete can be transformed into a material suitable for daytime radiative cooling.
Collapse
Affiliation(s)
- Jorge S. Dolado
- Centro
de Física de Materiales, CFM (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, 20170 Donostia/San Sebastián, Spain
- Donostia
International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20170 Donostia/San Sebastián, Spain
| | - Guido Goracci
- Centro
de Física de Materiales, CFM (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, 20170 Donostia/San Sebastián, Spain
| | - Silvia Arrese-Igor
- Centro
de Física de Materiales, CFM (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, 20170 Donostia/San Sebastián, Spain
| | - Andrés Ayuela
- Centro
de Física de Materiales, CFM (CSIC-UPV/EHU), Paseo Manuel de Lardizabal 5, 20170 Donostia/San Sebastián, Spain
- Donostia
International Physics Center (DIPC), Paseo Manuel de Lardizabal 4, 20170 Donostia/San Sebastián, Spain
| | - Angie Torres
- Department
of Electrical, Electronic and Communications Engineering, Public University of Navarre (UPNA), 31006 Pamplona, Spain
- Institute
of Smart Cities (ISC), Public University of Navarre (UPNA), 31006 Pamplona, Spain
| | - Iñigo Liberal
- Department
of Electrical, Electronic and Communications Engineering, Public University of Navarre (UPNA), 31006 Pamplona, Spain
- Institute
of Smart Cities (ISC), Public University of Navarre (UPNA), 31006 Pamplona, Spain
| | - Miguel Beruete
- Department
of Electrical, Electronic and Communications Engineering, Public University of Navarre (UPNA), 31006 Pamplona, Spain
- Institute
of Smart Cities (ISC), Public University of Navarre (UPNA), 31006 Pamplona, Spain
| | - Juan J. Gaitero
- TECNALIA,
Basque Research and Technology Alliance (BRTA), Astondo Bidea, Edificio 700, 48160 Derio, Spain
| | - Matteo Cagnoni
- Department
of Electronics and Telecommunications, Politecnico
di Torino, Corso Duca degli Abruzzi 24, Torino 10129, Italy
| | - Federica Cappelluti
- Department
of Electronics and Telecommunications, Politecnico
di Torino, Corso Duca degli Abruzzi 24, Torino 10129, Italy
| |
Collapse
|
2
|
Tan Q, Zhu H, Yang S, Yang X, Ou L. Precast Assembled Road Paving Technology: Progress and Prospects. MATERIALS (BASEL, SWITZERLAND) 2024; 17:2245. [PMID: 38793312 PMCID: PMC11123312 DOI: 10.3390/ma17102245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/16/2024] [Revised: 05/03/2024] [Accepted: 05/08/2024] [Indexed: 05/26/2024]
Abstract
This article presents a systematic review of the most cutting-edge research on precast pavement technology for the first time. Firstly, precast pavement is divided into two categories, precast cement concrete pavement and precast carpeted flexible pavement, according to the application of precast technology in pavement engineering. Subsequently, the structural characteristics, advantages, and disadvantages of various precast pavement systems are compared and analyzed; technical problems in precast pavement systems are explained; and future development directions are identified. In addition, the text specifically mentions the great contribution of precast carpeted flexible pavement technology in reducing the harmful effects of asphalt fumes on humans and the environment. This work will promote the application of prefabrication in road engineering and provide suggestions and references for subsequent research.
Collapse
Affiliation(s)
- Qiqi Tan
- School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; (Q.T.); (S.Y.); (X.Y.); (L.O.)
| | - Hongzhou Zhu
- School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; (Q.T.); (S.Y.); (X.Y.); (L.O.)
- National and Local Joint Engineering Research Center for Transportation and Civil Engineering Materials, Chongqing Jiaotong University, Chongqing 400074, China
| | - Song Yang
- School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; (Q.T.); (S.Y.); (X.Y.); (L.O.)
| | - Xiaosi Yang
- School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; (Q.T.); (S.Y.); (X.Y.); (L.O.)
| | - Li Ou
- School of Civil Engineering, Chongqing Jiaotong University, Chongqing 400074, China; (Q.T.); (S.Y.); (X.Y.); (L.O.)
| |
Collapse
|
3
|
Investigation of Parking Lot Pavements to Counteract Urban Heat Islands. SUSTAINABILITY 2022. [DOI: 10.3390/su14127273] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Urban heat islands (UHI) are one of the unequivocal effects of the ongoing process of climate change: anthropized areas suffer extreme heat events that affect the human perception of comfort. This study investigated the effects of road pavements as a passive countermeasure by comparing the air temperature (AT) and the predicted mean vote (PMV) for different surface materials used to pave a historical square in Rome, Italy. The software ENVI-met has been used to compare, for the whole year 2021, the performances of the existing asphalt pavement with five alternative solutions composed of light concrete, bricks, stone, wood, and grass. This paper proposed a new methodology to summarize the multi-dimensional results over both temporal and spatial domains. The results of the simulations in the evening of the hottest month showed the existing asphalt pavement gives the worst performance, while the light concrete blocks and the grass pavement ensure the coolest solutions in terms of AT (the average AT is 32 °C for the asphalt pavement and 30 °C for the modular one) and PMV (the maximum PMV value is 4.6 for the asphalt pavement and 4.4 for the modular and grass ones).
Collapse
|
4
|
Precast Concrete Pavements of High Albedo to Achieve the Net “Zero-Emissions” Commitments. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12041955] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Pavements store heat, which is subsequently released into the atmosphere, heating the surrounding air. Therefore, this process contributes to climate change and global warming. For this reason, the use of high-solar-reflectance (albedo) pavements is seen as one of the potential mitigation methods for climate change. Concrete pavements have a much higher albedo than asphalt due to their light gray color compared with black pavements. Accordingly, the widespread utilization of highly reflective concrete pavements will improve local climate change mitigation. Nevertheless, concrete albedo slightly decreases over time because of weathering. Albedo and solar reflectance index (SRI) measurements were taken on actual precast concrete pavements made with different mixes. The methodology applied for this project is based on the comparison between the asphalt and concrete pavements’ reflectivity. Conventional concrete mix designs can provide cool pavements with SRI higher than 29. Replacement of black pavements by highly reflective concrete pavements appeared to be a cost-effective and easily implemented measure to combat climate change. Finally, multidisciplinary studies considering factors such as building materials’ albedo, among other mitigation measures, should be performed to provide more precise and reliable guidance to policymakers, stakeholders, decision makers and urban planners.
Collapse
|