Properties of Self-Compacting Concrete with Recycled Coarse Aggregate

Tang, Waiching; Ryan, Paraic C.; Cui, Hongyang; Liao, Wenyu

doi:10.1155/2016/2761294

Cited by 59 publications

(52 citation statements)

References 26 publications

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“…erefore, particle clumps with irregular geometries were implemented in the simulation. Tang et al [24] developed a method to generate particles with irregular geometries. However, postsimulation revealed that such a method can only produce irregular particles with high efficiency when the size of the model is relatively small.…”

Section: Simulation Methods For Capturing the Shapes Of Particlesmentioning

confidence: 99%

“…e granular particle size distribution between the numerical model and actual samples is shown in Figure 3, which demonstrates high consistency between the two. A closer examination of the calcite crystals obtained using the optimised irregular particle generation algorithm (c � 0.25) suggests that such a method provides a better description of the crystal boundary features and therefore a more accurate characterization of the sample in comparison to the conventional algorithm [24] (Table 1). Furthermore, the morphology of the crystals generated using the new algorithm shows a strong similarity to the XCT scanned morphology of the particles obtained under typical testing conditions (Figure 4).…”

Section: Methods For Constructing the Numerical Model For Typicalmentioning

confidence: 99%

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Research on Simulation Analysis Method of Microbial Cemented Sand Based on Discrete Element Method

Tang

Lian

et al. 2019

Advances in Materials Science and Engineering

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A simulation method for microbial cemented sand (MCS) based on the Two-Dimensional Particle Flow Code (PFC 2D) has been developed in this study. It consists of an identification of mesoscopic contact model for structural mesoscopic particles, development of morphological algorithm for irregular crystal particles, and classification and setting of mesoscopic parameters for compositional materials and particle size distribution simulation. Additionally, an acoustic emission algorithm based on moment tensor theory was developed for discrete element simulation analysis on fracture characteristic of cemented sand under the action of the force. e simulation method proposed in this article/paper may reflect the physical and mechanical characteristics of real microbial cemented sand based on physical experiments. Quantification of the fracture process of microbial cemented sand is possible by introducing a moment magnitude (MW) in discrete element simulation analysis. e material may have greater probability of fracture between the MW ranges of −6.8 and −6.6. e relationship between probability of fracture at different MWs and the MW follows the Gaussian curve. e research results are a new trial for fracture analysis on microbial cemented sand.

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Section: Simulation Methods For Capturing the Shapes Of Particlesmentioning

confidence: 99%

Section: Methods For Constructing the Numerical Model For Typicalmentioning

confidence: 99%

Research on Simulation Analysis Method of Microbial Cemented Sand Based on Discrete Element Method

Tang

Lian

et al. 2019

Advances in Materials Science and Engineering

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“…(LWA60). In fact, sharp shape and rough surface of AAC-LWA could decrease the slump value due to interlocking and internal friction among materials [11]. However, in this case, the slump value was mainly dominated by water retainability, extra water on the surface of AAC particles.…”

Section: Slump Testmentioning

confidence: 92%

Properties and Internal Curing of Concrete Containing Recycled Autoclaved Aerated Lightweight Concrete as Aggregate

Suwan

Wattanachai

2017

Advances in Materials Science and Engineering

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Global warming is a vital issue addressed to every sector worldwide, including the construction industry. To achieve the concept of green technology, many attempts have been carried out to develop low-carbon footprint products. In the construction sector, Autoclaved Aerated Concrete (AAC) has become more popular and been manufactured to meet the construction demand. However, errors from manufacturing process accounted for approximately 3 to 5% of the AAC production. The development of AAC waste as lightweight aggregate in concrete is one of the potential approaches which was extendedly studied in this paper. The results showed that the compressive strength of AAC-LWA concrete was decreased with an increase in volume and coarse size. The optimum mix proportion was the AAC aggregate size of 1/2 to 3/8 with 20 to 40% replacement to normal weight aggregate. Internal curing by AAC-LWA was also observed and found to provide sufficient water inside the specimens, leading to an achievement in higher compressive strength. The main goal of this study is not only utilising unwanted wastes from industry (recycling of waste materials) but also building up a new knowledge of using AAC-LWA as an internal curing agent as well as the production of value-added lightweight concrete products.

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“…Tais resíduos são diversas vezes descartados em locais impróprios, impactando significantemente o meio ambiente [2].…”

Section: -Considerações Iniciaisunclassified

Efeito dos agregados graúdos reciclados nas propriedades de concretos autoadensáveis dosados por empacotamento de partículas

Cavaliere

Campos²,

Barbosa

et al. 2018

Libro De Comunicaciones / Livro Das Comunicações

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RESUMOA construção civil é responsável por significativos impactos ambientais, uma vez que é expressiva consumidora de recursos naturais e grande geradora de resíduos sólidos. A utilização de agregados reciclados pode ser uma alternativa para a mitigação de tais impactos. Por essa razão, o objetivo desse trabalho foi analisar o comportamento, nos estados fresco e endurecido, de concretos autoadensáveis (CAA) produzidos com agregados graúdos reciclados e dosados por meio do conceito de empacotamento de partículas. Foram analisadas quatro composições de CAA, sendo que a primeira empregou apenas agregados naturais, e serviu de referência para este estudo. Nas demais misturas foram utilizados agregados graúdos reciclados de resíduos de construção e demolição em substituição à brita natural, em teores de 20, 50 e 100%, em massa. Os resultados obtidos demonstraram que todas as composições apresentaram desempenho satisfatório no estado fresco, porém, verificou-se que as propriedades mecânicas decresceram consoante o aumento no teor de agregado reciclado. PALAVRAS-CHAVE:concreto autoadensável; agregados reciclados; empacotamento de partículas; resíduos de construção e demolição; sustentabilidade. 1.-CONSIDERAÇÕES INICIAISO setor da construção civil consome elevada quantidade de recursos naturais, e por consequência, torna-se um expressivo gerador de resíduos de construção e demolição (RCD) [1]. Tais resíduos são diversas vezes descartados em locais impróprios, impactando significantemente o meio ambiente [2].Diante desse cenário, o controle dos resíduos de RCD minimiza tanto o consumo de recursos minerais, como pode ser considerado uma alternativa viável e ecológica para a 147

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Properties of Self-Compacting Concrete with Recycled Coarse Aggregate

Cited by 59 publications

References 26 publications

Research on Simulation Analysis Method of Microbial Cemented Sand Based on Discrete Element Method

Research on Simulation Analysis Method of Microbial Cemented Sand Based on Discrete Element Method

Properties and Internal Curing of Concrete Containing Recycled Autoclaved Aerated Lightweight Concrete as Aggregate

Efeito dos agregados graúdos reciclados nas propriedades de concretos autoadensáveis dosados por empacotamento de partículas

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