Dynamic Mechanical Behaviors of Desert Sand Concrete (DSC) after Different Temperatures

Zhang, Minghu; Liu, Haifeng; Sun, Shuai; Chen, Xiaolong; Doh, Shu Ing

doi:10.3390/app9194151

Cited by 21 publications

(14 citation statements)

References 39 publications

(70 reference statements)

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“…In other desert countries (e.g., Egypt, Algeria, United Arab Emirates), although there is a lot of sand, it is not suitable for use in concrete, due to the high fineness and too smooth texture of the grains [2,9,12,13] or the pollution of sea sand chlorides [11]. However, both fields are studied [13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Properties of Concrete with Recycled Concrete Aggregate Containing Metallurgical Sludge Waste

et al. 2020

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Sand has been considered to be something of an immeasurable quantity. There are many indications that this view is no longer valid and that the limiting of natural aggregates usage is doubly justified. Firstly, the extraction of natural aggregates is expensive and has a huge impact on the environment. The main issues in sand and gravel mining are the large areas that are affected, ground water level changes, illegal mining, unsuitability of desert and marine sand, and costs of transport. Secondly, metallurgical waste can be used as a substitute for natural aggregates. This is doubly beneficial—the waste is recycled and the use of natural aggregates is reduced. Waste is stored in landfills that take up large areas and there is also the possibility of ground and groundwater pollution by hazardous compounds. The research presented in this article focuses on the technological conditions of using metallurgical waste in its original form and as a component of recycled concrete aggregate (RCA). The use of metallurgical sludge waste or crushed or round RCA to produce concrete deteriorates the consistency and does not significantly affect the air content and density of the concrete mix. RCA lowers the density of hardened concrete. Metallurgical sludge waste or RCA usage adversely affect the absorbability and permeability of concrete. Concrete containing metallurgical sludge waste is of higher compressive strength after 7 and 28 days, with up to 60% of waste as a sand replacement. RCA concrete achieved higher compressive strength also.

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Section: Introductionmentioning

confidence: 99%

Properties of Concrete with Recycled Concrete Aggregate Containing Metallurgical Sludge Waste

et al. 2020

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“…It takes the microprocessor as the core and combines multi-disciplinary expertise, such as computer technology, system control technology, and multimedia technology. The information of each scattered point is collected and concentrated via the data channel, and the temperature of the sintering furnace is controlled through monitoring and operation [ 27 , 28 ]. DCS is presented in Fig 6 , including an industrial computer and PLC controller in the control room, temperature controller, communication between industrial computer and PLC (using PrefilBus communication bus), and communication between PLC and temperature controller (using 485 communication bus).…”

Section: Methodsmentioning

confidence: 99%

Design and fault diagnosis of DCS sintering furnace’s temperature control system for edge computing

Wen

2021

PLoS ONE

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Under the background of modern industrial processing and production, the sintering furnace’s temperature control system is researched to achieve intelligent smelting and reduce energy consumption. First, the specific application and implementation of edge computing in industrial processing and production are analyzed. The industrial processing and production intelligent equipment based on edge computing includes the equipment layer, the edge layer, and the cloud platform layer. This architecture improves the operating efficiency of the intelligent control system. Then, the sintering furnace in the metallurgical industry is taken as an example. The sintering furnace connects powder material particles at high temperatures; thus, the core temperature control system is investigated. Under the actual sintering furnace engineering design, the Distributed Control System (DCS) is used as the basis of sintering furnace temperature control, and the Programmable Logic Controller (PLC) is adopted to reduce the electrical wiring and switch contacts. The hardware circuit of DCS is designed; on this basis, an embedded operating system with excellent performance is transplanted according to functional requirements. The final DCS-based temperature control system is applied to actual monitoring. The real-time temperature of the upper, middle, and lower currents of 1# sintering furnace at a particular point is measured to be 56.95°C, 56.58°C, and 57.2°C, respectively. The real-time temperature of the upper, middle, and lower currents of 2# sintering furnaces at a particular point is measured to be 144.7°C, 143.8°C, and 144.0°C, respectively. Overall, the temperature control deviation of the three currents of the two sintering furnaces stays in the controllable range. An expert system based on fuzzy logic in the fault diagnosis system can comprehensively predict the situation of the sintering furnaces. The prediction results of the sintering furnace’s faults are closer to the actual situation compared with the fault diagnosis method based on the Backpropagation (BP) neural network. The designed system makes up for the shortcomings of the sintering furnace’s traditional temperature control systems and can control the temperature of the sintering furnace intelligently and scientifically. Besides, it can diagnose equipment faults timely and efficiently, thereby improving the sintering efficiency.

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“…By fitting the cubic diagram in Figure 17, for DSC after elevated temperature, the empirical formula between minimum particle size, temperature, volume content, and compressive strength is obtained, as shown in equation (11).…”

Section: Effect Of Minimum Particle Size Of Coarse Aggregate On Compressivementioning

confidence: 99%

“…To reduce the dependency on nonrenewable sources while curbing environmental pollutions, desert sand was used as a substitute for medium sand. Many researchers are working on DSC [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Study the Fire Resistance of Desert Sand Concrete (DSC) with Interface Phase through Uniaxial Compression Tests and Analyses

Zhang

Liu

et al. 2021

Advances in Civil Engineering

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The shortage of sand resources and high-rise building fires are becoming increasingly prominent. Desert sand (DS) with smaller particles can effectively fill the concrete voids and further improve its working performance; it is used as a fine aggregate to produce concrete. This article studied the performance of desert sand concrete (DSC) against fire resistance by using mathematical modeling for simulation. The stress-strain curves of desert sand mortar (DSM) after elevated temperatures were tested, and the constitutive model was established. By comparing the experiment and simulation results, it was verified that the model is suitable to be adopted in this study. Data from experiment and past literature can serve as parameters for the subsequent simulation. The destruction process of DSC under uniaxial compression after elevated temperature was simulated by using ANSYS. The simulation results indicated that, after elevated temperature, compressive strength reduced with increase of interface thickness. The compressive strength of DSC had a substantially linear increase as the interface compressive strength increased. For two-grade coarse aggregate, the optimum volume content was 45%, and particle size of it showed a significant effect on the compressive strength of DSC. The DSM constitutive model and simulation results can provide a sound theoretical basis and technical support for DSC engineering applications.

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Dynamic Mechanical Behaviors of Desert Sand Concrete (DSC) after Different Temperatures

Cited by 21 publications

References 39 publications

Properties of Concrete with Recycled Concrete Aggregate Containing Metallurgical Sludge Waste

Properties of Concrete with Recycled Concrete Aggregate Containing Metallurgical Sludge Waste

Design and fault diagnosis of DCS sintering furnace’s temperature control system for edge computing

Study the Fire Resistance of Desert Sand Concrete (DSC) with Interface Phase through Uniaxial Compression Tests and Analyses

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