scholarly journals Mechanical Properties of Ceramic Waste as an Alternative Material of Concrete Aggregate

2020 ◽  
Vol 9 (5) ◽  
pp. 1118-1123
Keyword(s):  
Mechanical Properties ◽  
Concrete Aggregate ◽  
Test Results ◽  
X Ray Diffraction ◽  
X Ray ◽  
Concrete Aggregates ◽  
Ceramic Waste ◽  
Material Resources ◽  
Alternative Material ◽  
Aggregate Material

The increasing building construction in the field of civil engineering that requires supporting materials, starting in terms of human resources and material resources. Progress in the material field must consider energy-saving aspects. Therefore it is necessary to think about the use of useless materials such as ceramic waste. The purpose of this study is to see the potential of ceramic waste as an aggregate in terms of mechanical properties, with the hope of providing an alternative to concrete aggregates other than natural stone aggregates. Ceramic waste aggregate material testing is done by testing: chemical composition, absorption and water content, specific gravity, soundness, abrasion, granular form, gradation, and X-ray diffraction (X-RD). The test results show that the ceramic waste aggregate (CWA) can be used as a concrete aggregate. Ceramic waste aggregate (CWA) characteristics are sufficient to meet the standards as concrete aggregates according to the SII standard, BSI standard, and ASTM standards. While the X-ray diffraction test (X-RD) shows that no element damages concrete, there is no active silica that can react with alkaline cement and is not as a pozzolan.

Use of Retorted Shale as Sulfur Adsorbent

2018 ◽  
Vol 930 ◽  
pp. 562-567
Author(s):  
Rodolfo Luiz Bezerra de Araújo Medeiros ◽  
Maria de Fátima Dantas e Silva ◽  
Rodrigo César Santiago ◽  
Gilvan Pereira de Figueredo ◽  
Heloísa Pimenta de Macedo ◽  
...  
Keyword(s):  
Acid Leaching ◽  
Gas Production ◽  
Liquid Fuels ◽  
Test Results ◽  
X Ray Diffraction ◽  
Adsorptive Desulfurization ◽  
Wet Impregnation ◽  
X Ray ◽  
Chemically Modified ◽  
Alternative Material

The aim of this work is to use a residue from shale gas production, known as retorted shale (RS), as an alternative material for processes of sulfur adsorptive desulfurization in liquid fuels such as gasoline or diesel. Therefore, retorted shale samples were chemically modified. Two methods were applied: acid leaching and impregnation. The first method (RS-HCl) was an acid treatment with HCl solution (3M) in proportion of 1.5: 10. The second method (RS-Fe) was a wet impregnation of 20%wt. of Fe followed by calcination at 700°C for 2 h. The adsorbents were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The adsorption tests were performed using a solution of n-heptane and thiophene to simulate a fuel with an initial concentration of 500 ppm of sulfur. The results showed that both methods significantly altered the structure of the retorted shale, mainly the amount of Fe2O3. The adsorption test results indicated that the adsorbents prepared can remove up to 90% of the sulfur present.

Mechanical Properties of Fly Ash-Slag-Dredged Silt System Stimulated by Alkali

2013 ◽  
Vol 807-809 ◽  
pp. 1140-1146 ◽  
Author(s):  
Yi Xuan Chen ◽  
Xiu Li Sun ◽  
Zhi Hua Li
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Fly Ash ◽  
Construction Materials ◽  
Xrd Analysis ◽  
Test Results ◽  
X Ray Diffraction ◽  
Shear Tests ◽  
X Ray ◽  
Direct Shear Tests

The objective of this work is to investigate the stimulation effect of the addition of alkali on the fly ash and slag for stabilizing dredged silt. Based on the test results, a viable alternative for the final disposal of dredged silt as subgrade construction materials were proposed. For this purpose, several mixtures of dredged silt-fly ash-slag and alkali were prepared and stabilized/solidified. In this system, fly ash and slag were used as hardening agents (solidified materials) of dredged silt and alkali was used as activator of fly ash and slag. The shear strength of the mixture was tested by several direct shear tests. Furthermore, X-Ray Diffraction (XRD) analysis was used to determine the hydration products of the system. The specimens were tested in order to determine the shear strength changes versus hydration time and the alkali content. It is indicated that mechanical properties of solidified silt are improved significantly by addition of fly ash and slag stimulated by alkali.

Microstructures and Properties of W-26Re Alloy by SPS

2012 ◽  
Vol 236-237 ◽  
pp. 113-117
Author(s):  
Song Wang ◽  
Ming Xie
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Test Results ◽  
Micro Hardness ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hardness Tester ◽  
Fine Grain ◽  
Plasma Sintering ◽  
Spark Plasma

W-26Re alloy was fabricated by spark plasma sintering (SPS) technology. The phases, microstructures and mechanical properties of the alloy were investigated by X-ray diffraction, optical light microscope, scanning electron microscope, energy dispersion spectroscope, digital display micro-hardness tester and tensile test. Results show that, using SPS technique can prepare W-26Re alloy with high density, fine grain and excellent mechanical properties. The relative density of W-26Re alloy was 96.2%. The main phases in the alloy were determined by the amount of (W) solid solution and the intermetallic  phases. The micro-hardness was 729HV, the ultimate tensile strength was 1680MPa, yield tensile strength was 1143MPa and elongation of alloy was 8.7%.

Research on the Microstructure and Mechanical Properties of Spray-Deposited 8009 Heat Resistant Aluminum Alloy

2014 ◽  
Vol 543-547 ◽  
pp. 3733-3736
Author(s):  
Rong Hua Zhang ◽  
Biao Wu ◽  
Xiao Ping Zheng
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Tensile Tests ◽  
Test Results ◽  
Secondary Phases ◽  
X Ray Diffraction ◽  
X Ray ◽  
Heat Resistant ◽  
Microstructure And Mechanical Properties ◽  
Transmission Electron

In this study, 8009 heat resistant aluminum alloy was synthesized by the spray atomization and deposition technique. The microstructure and mechanical properties of the alloy were studied using transmission electron microscopy, X-ray diffraction, and tensile tests. The secondary phases in the microstructure of the spray-deposited alloy were examined. The tensile test results indicate that the spray-deposited 8009 alloy both at room and elevated temperature displays superior tensile strength due to the presence of the thermally stable Al12(Fe,V)3Si particles.

Microstructure and Mechanical Properties of an Al-Cu-Mg-Fe-Ni Alloy

2014 ◽  
Vol 988 ◽  
pp. 156-160
Author(s):  
Hong Wei Liu ◽  
Feng Wang ◽  
Bai Qing Xiong ◽  
Yong An Zhang ◽  
Zhi Hui Li ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Cast Alloy ◽  
Tensile Tests ◽  
Eutectic Structure ◽  
Test Results ◽  
X Ray Diffraction ◽  
X Ray ◽  
Microstructure And Mechanical Properties ◽  
Ni Alloy ◽  
Scanning Electron

The microstructure and mechanical properties of the Al-2.24Cu-1.42Mg-0.9Fe-0.9Ni alloy were studied using optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and tensile tests. The results indicate that the microstructures of the as cast alloy involve α-Al matrix, Al/Al2CuMg eutectic structure, Al7Cu2Fe, Al7Cu4Ni and Al9FeNi compounds. The tensile test results indicate that the alloy at elevated temperature (200°C) displays superior tensile strength due to the presence of the thermally stable Al7Cu2Fe, Al7Cu4Ni and Al9FeNi compounds.

scholarly journals Characterisation of recycled ceramic mortars for use in prefabricated beam-filling pieces in structural floors

2019 ◽  
Vol 69 (334) ◽  
pp. 189
Author(s):  
P. Rubio de Hita ◽  
F. Pérez-Gálvez ◽  
M. J. Morales-Conde ◽  
M. A. Pedreño-Rojas
Keyword(s):  
Mechanical Properties ◽  
Chemical Composition ◽  
Partial Replacement ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ceramic Waste ◽  
Physical Chemical ◽  
Different Types ◽  
Materials Used

This study analyses a procedure to manufacture mortars with different percentages of ceramic waste as partial replacement for aggregates. The study also examines the physical, chemical and mechanical properties of the new mortars, analysing substitution ratios that range from 10% to 50%. Prior to this, all the materials used in the production of the mortar were characterised using X-ray diffraction (XRD) and fluorescence (XRF). The objective was to determine the similarity between different types of ceramic waste, as well as the differences in the minerology and chemical composition with the aggregate. The results of the study show that it is possible to obtain mortars with lower densities compared to the same product with no recycled content. The product’s characteristics make it ideal for the manufacture of prefabricated components for structural floors for rehabilitation works. Finally, the pieces are used in a real rehabilitation case study, highlightining the structural advantages.

scholarly journals Modification of Low-Density Slag Cementing Slurry with SiC Whiskers at High Temperature

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Hongqiong Fu ◽  
Xiaoyang Guo ◽  
Ping Zhou ◽  
Ping Yan ◽  
Youzhi Zheng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
High Temperatures ◽  
Test Results ◽  
X Ray Diffraction ◽  
Mass Percentage ◽  
X Ray ◽  
Sic Whiskers ◽  
Ft Ir ◽  
Further Development ◽  
Solidified Body

The aim of this study was to improve the mechanical properties of a slag solidified body at high temperatures. Composite materials with different contents of SiC whiskers were prepared and characterized using techniques such as mechanical testing, scanning electron microscopy (SEM), X-ray diffraction (XRD), thermogravimetric analysis (TGA), and Fourier transform infrared spectroscopy (FT-IR). When the SiC whisker addition is 1% mass percentage, the compressive and tensile strength of the slag solidified body after hydration for 7 days increased by 10.2% and 39.3%, respectively, and Young’s modulus decreased by 16.8%. The results show that the addition of SiC whiskers can enhance the mechanical properties of solidified slag bodies at high temperatures. According to the test results, the hydration products of the slag solidified body mainly consist of honeycomb tobermorite (C-S-H) gel at high temperatures in addition to a small number of spherical products. The spheres are connected to form a dense structure; however, noticeable cracks were present. The addition of SiC whiskers effectively inhibited the initiation and further development of microcracks and improved the bearing capacity of the slag solidified body.

scholarly journals Effect of Ceramic Waste Aggregate in Concrete to Reduce Environmental Pollution

2019 ◽  
Vol 9 (2) ◽  
pp. 3112-3117
Keyword(s):  
Environmental Pollution ◽  
Partial Replacement ◽  
Concrete Aggregate ◽  
Normal Concrete ◽  
Concrete Aggregates ◽  
Ceramic Waste ◽  
A Value ◽  
Compressive Strength Test ◽  
Aggregate Material ◽  
Percentage Porosity

The utilization of ceramic waste is one solution to reduce environmental pollution due to development waste. The aim of this study was to utilize ceramic waste as a concrete aggregate material. The test consisted of the mechanical properties test of ceramic waste aggregates and the compressive strength test of ceramic concrete. The variation of normal aggregate partial replacement with the aggregate of CWA is 0%, 25%, 50%, 75%, and 100%. The total number of specimens is 50 cylinders. From the results of material testing and ceramic concrete tests showed that ceramic waste aggregate can be used as concrete aggregates, especially for elements that accept compressive forces, shear forces, and in-plane forces. The X-ray test shows that CWA aggregate is not pozzolanic, so it can be used as a concrete aggregate to reduce environmental pollution. The percentage porosity of ceramic concrete is smaller than the porosity of normal concrete. The effect of partial replacement of normal aggregate with the CWA aggregate in concrete optimum at a value of 55% CWA aggregate.

Microstructure and Mechanical Properties of Spray-Deposited Zn-30Al-1Cu Alloy

2012 ◽  
Vol 706-709 ◽  
pp. 264-267
Author(s):  
Feng Wang ◽  
Bai Qing Xiong ◽  
Yon Gan Zhang ◽  
Hong Wei Liu ◽  
Zhi Hui Li ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Tensile Tests ◽  
Chinese Script ◽  
Spray Atomization ◽  
Test Results ◽  
X Ray Diffraction ◽  
X Ray ◽  
Microstructure And Mechanical Properties ◽  
Transmission Electron

In this study, Zn-30Al-1Cu alloy was synthesized by the spray atomization and deposition technique. The microstructure and mechanical properties of the alloy were studied using optical microscopy, scanning electron microscopy, transmission electron microscopy, X-ray diffraction and tensile tests. It can be seen that the microstructure of spray-deposited Zn-30Al-1Cu alloy is composed of the Zn/Al eutectoids and few compounds. The Zn/Al eutectoids were shown lamellar, particle and Chinese script morphologies. The compound phases in the microstructure of the spray-deposited alloy were examined. The property test results indicate that the spray-deposited Zn-30Al-1Cu alloy displays superior tensile strength.

Mechanical properties of FeAlSi powders prepared by mechanical alloying from different initial feedstock materials

2019 ◽  
Vol 107 (2) ◽  
pp. 207 ◽  
Author(s):  
Jaroslav Čech ◽  
Petr Haušild ◽  
Miroslav Karlík ◽  
Veronika Kadlecová ◽  
Jiří Čapek ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Mechanical Alloying ◽  
Young’S Modulus ◽  
Milling Time ◽  
Young's Modulus ◽  
Element Model ◽  
X Ray Diffraction ◽  
X Ray ◽  
Powder Particles ◽  
Complete Homogenization

FeAl20Si20 (wt.%) powders prepared by mechanical alloying from different initial feedstock materials (Fe, Al, Si, FeAl27) were investigated in this study. Scanning electron microscopy, X-ray diffraction and nanoindentation techniques were used to analyze microstructure, phase composition and mechanical properties (hardness and Young’s modulus). Finite element model was developed to account for the decrease in measured values of mechanical properties of powder particles with increasing penetration depth caused by surrounding soft resin used for embedding powder particles. Progressive homogenization of the powders’ microstructure and an increase of hardness and Young’s modulus with milling time were observed and the time for complete homogenization was estimated.

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