Study on the Effect of Recycled Coarse Aggregate on the Shrinkage Performance of Green Recycled Concrete

Yu, Yang; Wang, Peihan; Yu, Zexin; Yue, Gongbing; Wang, Liang; Guo, Yuanxin; Li, Qiuyi

doi:10.3390/su132313200

Cited by 12 publications

(8 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, the production of one ton of PC clinker creates approximately one ton of CO 2 and other greenhouse gases [18]. Furthermore, massive environmental impacts are caused during cement production due to the hightemperature calcination of carbonate minerals, causing clinker and CO 2 to be emitted into the atmosphere [22,23]. Although PC production is considered a critical factor in the context of achieving sustainability, the related relationship between GC, cement production, and CO 2 emissions needs further investigation, as do innovative solutions based on cooperation between architects, engineers, stakeholders, cement manufacturers, and the public and private construction sectors [14,24,25].…”

Section: Cement and Co 2 Emissionsmentioning

confidence: 99%

Effects of Using Green Concrete Materials on the CO2 Emissions of the Residential Building Sector in Egypt

Marey¹,

Kozma²,

Szabó³

2022

Sustainability

View full text Add to dashboard Cite

Increasing the rate of construction material consumption has caused significant environmental problems in recent decades, especially the production of ordinary Portland cement (OPC), which has been associated with 8% of the world’s human CO2 emissions and is considered the leading binder of concrete. This study aims to investigate the effects of substituting conventional concrete (CC) material with green concrete (GC) in the non-structural concrete works of a residential building in New Borg El-Arab City, Egypt. It attempts to establish what the effects are of using GC on cement, natural aggregates, and CO2 emissions in the design phase. By using a design-based solution (DBS), we began with redesign, reduce, reselect, reuse, and recycle strategies to find an optimal solution for applying recycle aggregate concrete (RAC) as a replacement material in selected building parts, such as the internal floor, external sidewalk, entrance steps, and wall boundary. AutoCAD software and 3Dmax were used to modify the original design and obtain two design references with four different scenarios. Comparative analyses were applied to investigate the effects of different concrete materials. The results show a reduction of about 19.4% in cement consumption in terms of the total concrete of the building and a 44.5% reduction in CO2 emissions due to the reduction of cement in specific building parts. In addition, this solution decreased natural coarse aggregate (NCA) consumption by 23.7% in the final concrete. This study recommends that GC materials close the loop of cementitious material consumption to reduce environmental impacts and achieve sustainability in the Egyptian building sector.

show abstract

Section: Cement and Co 2 Emissionsmentioning

confidence: 99%

Effects of Using Green Concrete Materials on the CO2 Emissions of the Residential Building Sector in Egypt

Marey¹,

Kozma²,

Szabó³

2022

Sustainability

View full text Add to dashboard Cite

show abstract

“…In comparison to traditional algorithms, this algorithm is renowned for its efficient, concise parameter settings, and ease of implementation, garnering widespread attention and recognition in academia. Applications span various domains, including power system scheduling [18], controller parameter optimization [19], data processing [20],…”

Section: Population Initialization Based On Chaotic Mappingmentioning

confidence: 99%

An efficient power optimization method for fixed polarity Reed-Muller logic circuits based on a multi-strategy gray wolf optimization algorithm

曹,

He,

Zhao

et al. 2024

Preprint

View full text Add to dashboard Cite

Optimization of power consumption has emerged as a pivotal objective in the domain of integrated circuit design. The optimization of Fixed Polarity Reed-Muller (FPRM) circuit power entails addressing a combinatorial optimization challenge that seeks to identify the optimal polarity configuration within the polarity optimization space, ultimately minimizing power consumption. In the current methodologies for FPRM circuit power optimization, drawbacks such as suboptimal efficiency and subpar results are evident. In response to these challenges, we introduce a novel Multi-Strategy Grey Wolf Optimization (M-GWO) algorithm. M-GWO leverages chaotic mapping for population initialization, integrates a global search optimizer inspired by the stochastic and spiral search behaviors of the whale optimization algorithm, and incorporates a local depth-exploiting optimizer based on the running and predation behaviors of the wolf pack optimization algorithm. Subsequently, we present a power optimization approach for FPRM logic circuits, utilizing the M-GWO algorithm. This method employs M-GWO to explore the polarity optimization space of FPRM circuits, seeking the optimal polarity configuration with minimal power consumption to achieve circuit power optimization. Experimental validation, conducted on the Microelectronics Center of North Carolina Benchmark test circuits and the Institute of Electrical and Electronics Engineers Congress on Evolutionary Computation benchmarks test functions, attests to the efficacy, superiority, and universality of the M-GWO.

show abstract

“…Ref. [6] The presence of water and air is the cause of other undesirable compounds [7,8]. For example, chloride in the water might be found in the concrete.…”

Section: Chloride Penetration Behaviormentioning

confidence: 99%

Chloride Penetration Behavior of Concrete Made from Various Types of Recycled Concrete Aggregate

Yodsudjai

Nitichote

2022

Sustainability

View full text Add to dashboard Cite

This research aimed to identify the link between the chloride penetration behavior of concrete made from various types of recycled aggregate from three main sources—building demolition waste (B-RCA), laboratory waste (L-RCA), and precast concrete waste (P-RCA)—and the 28-days compressive strength of natural aggregate concrete with the replacement ration 30%, 60% and 100% respectively. The results of the study revealed that the quality of recycled aggregate waste significantly impacted concrete behavior. To elaborate, finer aggregate potentially increased the inter-facial transition zone (ITZ), which is the weakness part of concrete, resulting in the concrete having less compressive strength as well as increasing amount of chloride ion penetration thought rapid test. In this research, an image processing technique, which is a simple method, was used to quantify the ITZ area of concrete. It was found that concrete with low compressive strength and high permeability values had an ITZ area significantly more than other types of concrete.

show abstract

Study on the Effect of Recycled Coarse Aggregate on the Shrinkage Performance of Green Recycled Concrete

Cited by 12 publications

References 44 publications

Effects of Using Green Concrete Materials on the CO2 Emissions of the Residential Building Sector in Egypt

Effects of Using Green Concrete Materials on the CO2 Emissions of the Residential Building Sector in Egypt

An efficient power optimization method for fixed polarity Reed-Muller logic circuits based on a multi-strategy gray wolf optimization algorithm

Chloride Penetration Behavior of Concrete Made from Various Types of Recycled Concrete Aggregate

Contact Info

Product

Resources

About