Analytical Study on the Change of Fluidity of Fresh Concrete Containing Mineral Admixture with Rest time

Cao, Guodong; Li, Zhuguo; Guo, Kun

doi:10.3151/jact.15.713

Cited by 8 publications

(4 citation statements)

References 20 publications

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“…Cao y colaboradores analizaron los efectos de CV y EAHG sobre la dependencia del tiempo en el concreto fresco utilizando el método de elementos discretos (DEM) donde realizan diferentes pruebas de flujo en relación al tiempo con un embudo; los resultados demostraron que este método puede predecir la fluidez en función tiempo del concreto y que, en comparación con las CV, la extensión decreciente de la EAHG es mayor (Cao, et al, 2017).…”

Section: Influencia Del Aditivo En Estado Frescounclassified

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El Uso del aditivo mineral como modificador de las propiedades mecánicas en el concreto: una revisión

et al. 2021

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El presente artículo recopila e identifica la adición de ciertos aditivos minerales de uso más frecuente en la industria de la construcción como modificadores del concreto durante su estado fresco y endurecido, los cuales en su mayoría son usados como remplazo parcial del cemento. Actualmente los investigadores buscan optimizar las propiedades del diseño de mezclas dependiendo al uso por el cual son concebidas, así mismo que sea factible económicamente y respetuoso con el medio ambiente. Se revisaron 50 artículos indexados entre los años 2010 y 2021 distribuidos en las siguientes bases de datos: 37 artículos de Scopus, 10 artículos de ScienceDirect, 2 artículos de Springer y 1 artículo de SciELO. Los aditivos en estudio son escoria de alto horno granulada (EAHG), cenizas volantes (CV), humo de sílice (HS), ceniza de cascarilla de arroz (CCA). En su mayoría presentan una mejora considerable en sus características mecánicas de tracción, resistencia a la compresión y módulo de elasticidad. La adición de CV mejora en la mezcla del diseño durante su estado fresco, la CCA durante su estado endurecido y las mejores resistencias para el HS; sin embargo, la EAHG resulta cumplir con casi todas las expectativas en mayor porcentaje y así mismo junto con la CCA, son potencialmente competitivos.

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Section: Influencia Del Aditivo En Estado Frescounclassified

“…A través de la creciente industrialización se ha reciclado tales desechos con el fin de reducir el uso del cemento Portland, utilizando como materiales suplementarios a cenizas volantes (CV), escoria granulada de alto horno (EAGH), etc. (Cao, et al, 2017).…”

Section: Introductionunclassified

El Uso del aditivo mineral como modificador de las propiedades mecánicas en el concreto: una revisión

et al. 2021

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“…Hoornahad and Koenders [16] used two-phase paste-bridge system as grain-paste-grain interactions to explore the fluidity of fresh concrete. Li et al [17,18] proposed a DEM model for predicting the time-dependent fluidity of fresh concrete. Zhang et al [19] established the normal action constitutive relationship between self-compacting concrete particles and then simulated the flow process of rock-filled concrete.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Motion Behavior of Concrete in Pump Pipe by DEM

Hao

Jin

et al. 2021

Advances in Civil Engineering

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In this paper, the mesocalibration test was used to measure the contact parameters (restitution coefficient, rolling friction coefficient, static friction coefficient, and surface energy) between coarse aggregate particles and mortar particles in Discrete Element Method (DEM) model of concrete. Then, the DEM model of concrete slump was established according to the coarse aggregate gradation to study the flow behavior of coarse aggregate in fresh concrete. The slump test result was compared with the output of the slump DEM model with high consistent, indicating the promising reliability of the mesocalibration test. Finally, based on the mesocalibration test results, the DEM model of pumping concrete was established. It was obtained that the pumping pressure calculated by the numerical model was similar to that of the pumping test with satisfactory accuracy better than the concrete pumping pressure calculated according to the rheological test results of concrete and lubricating layer. On this basis, the movement trajectory of coarse aggregate in the pump pipe was analyzed and the influence of coarse aggregate on the pumping performance of concrete was revealed.

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“…The production organization of multilayered wall panels is associated with a deep technological process restructuring, as well as the need to provide the production with expensive thermal insulation materials. Under these conditions, it is obvious that there is a need to find effective ways to increase the thermal insulation capabilities of single-layer structures [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Lightweight concrete of continuous structure without fine aggregate

2018

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The study deals with basic properties and area of application of lightweight concrete of continuous structure without fine aggregate. When fine aggregate is excluded from the concrete structure, it becomes lightweight, has lower thermal conductivity and cost, simpler production technology. It also has durability sufficient for wall panels, water resistance, frost resistance and a number of other indicators. The paper describes additives used for concrete air entrainment. Using these additives does not complicate the production technology of panels, the panels can be easily transported and have sufficient stability and durability upon storage. The article justifies effective application of light concrete with continuous structure without fine aggregate in low-rise construction. Light concretes of continuous structure without fine aggregate allow to completely exclude the use of fine aggregate, to sharply reduce density and thermal conductivity of concrete, as well as to reduce moisture content and humidity of products, improve their cohesion and workability and get a number of other benefits. The study shows that light concrete without fine aggregate numerous advantages prove that it will be used in construction practice for a long time.

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Analytical Study on the Change of Fluidity of Fresh Concrete Containing Mineral Admixture with Rest time

Cited by 8 publications

References 20 publications

El Uso del aditivo mineral como modificador de las propiedades mecánicas en el concreto: una revisión

El Uso del aditivo mineral como modificador de las propiedades mecánicas en el concreto: una revisión

Simulation of Motion Behavior of Concrete in Pump Pipe by DEM

Lightweight concrete of continuous structure without fine aggregate

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