Research on discrete element simulation of slump test for fresh self-compacting concrete

Mu, Jinlei; Li, Yue; Hao, Ji Ping; Liu, Yunze; Shen, Jiale

doi:10.1016/j.jobe.2023.106464

Cited by 4 publications

(3 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After analyzing the collision of materials during the mixing process on macro and fine scales, it is also necessary to view numerically the collision of different shapes of coarse aggregates with the mortar. In this article, the collision number rate was selected to characterize the collision situation between the coarse aggregate and mortar, and its formula is as follows [44]:…”

Section: Collision Of Coarse Aggregatementioning

confidence: 99%

Numerical Study on the Effect of Coarse Aggregate Shape during Concrete Mixing Process

Shen,

Wang,

Hou

et al. 2024

Materials

View full text Add to dashboard Cite

The shape of coarse aggregate is an important factor determining the performance of concrete, and it also affects the whole mixing process. This article selected four typical coarse aggregates and simulated the motion behavior of the coarse aggregate and mortar in a dual horizontal axis mixer using discrete element software, EDEM. The mixing motion of coarse aggregates with different shapes and mortar was studied using average velocity, contact rate, and dispersion coefficient as indicators. The results show that the largest average speed in the mixing process was achieved with the spherical coarse aggregate. Flat coarse aggregates have the highest velocity in the vertical direction, while ellipsoidal coarse aggregates have the lowest velocity. The spherical coarse aggregate mixes best with mortar while the ellipsoidal coarse aggregate mixes worst with mortar. The results of the study could provide strategies for the concrete mixing process considering the shape of the aggregate.

show abstract

Section: Collision Of Coarse Aggregatementioning

confidence: 99%

Numerical Study on the Effect of Coarse Aggregate Shape during Concrete Mixing Process

Shen,

Wang,

Hou

et al. 2024

Materials

View full text Add to dashboard Cite

show abstract

“…Finally, we lifted off the slump cylinder vertically within 3-5 s and measured the height difference between the simple height and the highest point of the composite cemented test body after slumping, which is the value of the collapse degree. The whole process from the beginning of loading to lifting the slump cylinder away was carried out without interruption and was completed within 150 s [42]. We measured the two diameters of the expansion surface perpendicular to each other after the termination of the RMC expansion and took the average value, that is, the value of the degree of expansion, and recorded the RMC's initial setting time and final setting time (ZKS-100 coagulation time tester).…”

Section: Flow and Setting Time Testsmentioning

confidence: 99%

Resource Utilization Potential of Red Mud: A Study on the Micro-Mechanism of the Synergistic Effect of Multiple Solid Waste Filling Materials

Zhang,

Yan,

Bai

et al. 2023

Sustainability

View full text Add to dashboard Cite

Red mud (RM) is a common industrial byproduct that is characterized by high alkalinity, high pollution, and difficult utilization. In this paper, gangue (CG), flue gas desulfurization gypsum (FGD), and silicate cement (PC) were used to assist red mud in the preparation of red mud-based composite filler material (RMC), aiming at the large-scale resource utilization of RM. The effects of the mass ratio of RM/CG, the mass ratio of FGD/(RM + CG), and the water–solid ratio (WCR) on the multi-angle properties of RMC were investigated and the optimal ratios were determined. The results showed that the RM/CG was 7:1, FGD/(RM + CG) was 4%, and WCR was 0.51 (RMC8), and the system could increase the RM content to 70%. The microstructural analysis of RMC using a specific surface area and porosity analyzer (BET), X-ray diffractometer (XRD), and scanning electron microscope (SEM) showed that its hydration products could remodel the pore structure, encapsulate and cement the coarse and fine particles into a dense matrix, and play a certain alkali reduction role, which revealed the microscopic synergistic mechanism between multiple solid wastes. The study shows that the comprehensive disposal of RM reduces the pollution released into the environment and provides new ideas for the green development of mines.

show abstract

“…With this high demand, concrete has become the object Available Online at https://ojs.unik-kediri.ac.id/index.php/ukarst/article/view/4401 https://doi.org/10.30737/ukarst.v7i1.4401 of much research. Several concrete innovations have been developed, such as fiber concrete [3], ultra-high performance concrete (UHPC) [4], self-compacting concrete (SCC) [5], and selfhealing concrete [6]. However, it must undergo a series of laboratory tests to develop this technology.…”

Section: Introductionmentioning

confidence: 99%

Discrete Element Method Approach to Simulate Cracks in Four-Point Flexural Test

arif

Widodo

Nugroho

et al. 2023

U Karst

View full text Add to dashboard Cite

Concrete is a material that is widely used in construction. Concrete research efforts are ongoing and through a series of experimental tests. On the other hand, experimental tests require a lot of money, take a long time, and create waste. Several studies have revealed that numerical testing can accurately test concrete to fractures. However, modeling for the four-point load flexure test pattern is still not widely discussed. This study aimed to model the four-point flexural test of concrete using the discrete element method (DEM) approach. Sieve gradation was performed to determine particle size, and flexure testing was performed to calibrate the DEM model. DEM flexure testing was made using Yet Another Dynamic Engine (YADE) software with ASTM D6272 reference and beam dimensions 105 x 105 x 535 mm. The cohesive contact model with spherical particles is used, and the algorithm developed modifies the faceted sphere of interaction. The study results revealed that DEM can simulate crack behavior in flexural testing of unreinforced concrete. The DEM results show only a 2.13% difference in the experimental results of the flexural strength test. Meanwhile, crack behavior can be observed directly in the DEM simulation. The results of this study can be used to predict the failure pattern of the flexural test structure and to design the right proportion of the mixture to match the desired flexural strength. So that material efficiency and concrete flexure testing time can be achieved.

show abstract

Research on discrete element simulation of slump test for fresh self-compacting concrete

Cited by 4 publications

References 20 publications

Numerical Study on the Effect of Coarse Aggregate Shape during Concrete Mixing Process

Numerical Study on the Effect of Coarse Aggregate Shape during Concrete Mixing Process

Resource Utilization Potential of Red Mud: A Study on the Micro-Mechanism of the Synergistic Effect of Multiple Solid Waste Filling Materials

Discrete Element Method Approach to Simulate Cracks in Four-Point Flexural Test

Contact Info

Product

Resources

About