Metal matrix production: Casting of recycled aluminum cans and incorporation of rice husk ash and magnesium

2020 ◽  
Vol 54 (22) ◽  
pp. 3229-3241 ◽  
Author(s):  
Gilson Gilmar Holzschuh ◽  
Dóris Sippel Dörr ◽  
Jorge André Ribas Moraes ◽  
Sérgio Boscato Garcia
Keyword(s):  
Rice Husk ◽  
Molten Aluminum ◽  
Rice Husk Ash ◽  
Impact Force ◽  
Charpy Impact ◽  
Chemical Compositions ◽  
Casting Yield ◽  
Density Analysis ◽  
Matrix Production ◽  
Aluminum Cans

This research experimented with different aluminum can casting compositions from recycled materials. The objective was to analyze the casting yield and the resulting chemical compositions of the process. In the first process, 20 kg of aluminum cans was melted, resulting in a 10.2 kg ingot, which presented a 51% yield. In the second process, 10 kg of 6063 T6 aluminum was used and 10.2 kg of the first casting was added. This mixture produced an ingot of 50% recycled aluminum and 50% 6063 aluminum that weighed 18.23 kg. Similarly, a second ingot was produced, but with the addition of 4 wt% of rice husk ash and 2 wt% of magnesium. From each ingot, the samples were removed for chemical analyses, which consisted of tests of the samples that had the incorporation of rice husk ash in the molten aluminum. These analyses included scanning by electron microscopy, density analysis, Brinell hardness, and Charpy impact force tests. The results of the second ingot analysis showed superior characteristics in Si and Mg levels due to the addition of rice husk ash and magnesium. Also, the second ingot presented increased hardness as well as a reduction fragility and density.

Chemical Composition and Physical Characteristics of Rice Husk Ash Blended Cement

2017 ◽  
Vol 32 ◽  
pp. 25-35 ◽  
Author(s):  
Akeem Ayinde Raheem ◽  
Mutiu A. Kareem
Keyword(s):  
Compressive Strength ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Blended Cement ◽  
Physical Characteristics ◽  
Chemical Compositions ◽  
Minimum Requirement ◽  
Suitable Material ◽  
Blended Cements ◽  
Renewable Material

Applications of agricultural by-product as substitute for non-renewable material in cement production are desirable in stimulating socio-economic development. In this study, Rice Husk Ash (RHA) blended cement was produced by replacing 5%, 7%, 11.25%, 15%, 20.25% and 25% by weight of Ordinary Portland Cement (OPC) clinker with RHA. The cement without RHA serves as the control. The chemical compositions of RHA, OPC-clinker and the blended cements were determined using X-ray fluorescence analyzer. The physical characteristics of RHA blended cements that were considered are fineness, soundness, consistency, initial and final setting times and compressive strength at 2, 7, 28, 56 and 90 curing ages. The results showed that RHA is a suitable material for use as a pozzolan as it satisfied the minimum requirement by having the sum of SiO2, Al2O3 and Fe2O3 of more than 70%. Incorporation of RHA led to an increase in the composition of SiO2 and reduction in that of CaO. An increase in RHA content showed a decrease in compressive strength at early ages and slightly increase at a later age (90 days). The blended cement produced with lower levels of RHA replacement conforms to standard specifications specified in BS EN 197-1:2000, NIS 439:2000 and ASTM C 150-02. The minimum Strength Activated Index (SAI) of 75% at the age of 28 days of curing as specified by ASTM C 618 was satisfied by RHA replacement of up to 15%. It was concluded that blended cement with the maximum of 15% RHA content is suitable for use for structural purposes.

Effect of Different Concentrations and Sizes of Particles of Rice Husk Ash - RHS in the Mechanical Properties of Polypropylene

2010 ◽  
Vol 660-661 ◽  
pp. 23-28 ◽  
Author(s):  
G.C. Nascimento ◽  
D.M. Cechinel ◽  
R. Piletti ◽  
Erlon Mendes ◽  
M.M.S. Paula ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Waste Product ◽  
Impact Resistance ◽  
Charpy Impact ◽  
Polymeric Materials ◽  
Optical Microscope ◽  
Uniaxial Tensile ◽  
Production Cycle

The minerals powders are much applied on polymeric materials to better its properties and to promote new applications. The rice husk ash powder - RHS is a mineral compound has been applied on polymeric compounds to increase the stiffness. This work presents studies of different sizes of particles of RHS applied at different concentrations in polypropylene. To study the mechanical properties were applied techniques of Charpy Impact Resistance and Uniaxial Tensile Analysis. The morphology was observed using the optical microscope. The results showed that the CCA may be an alternative in the incorporation of mineral loads in polypropylene, since this is a waste product generated in the production of rice, thus the complete closure of the production cycle of the cereal.

Mechanoactivation Of Rice Husk Ash In Laboratory Conditions

2019 ◽  
pp. 20-26
Keyword(s):  
Mechanical Activation ◽  
Rice Husk ◽  
Amorphous Silica ◽  
Silicon Oxide ◽  
Rice Husk Ash ◽  
Pozzolanic Activity ◽  
Maximum Solubility ◽  
Laboratory Conditions ◽  
Before And After ◽  
Mineral Additive

In many rice producing countries of the world, including in Vietnam, various research aimed at using rice husk ash (RHA) as a finely dispersed active mineral additive in cements, concrete and mortars are being conducted. The effect of the duration of the mechanoactivation of the RHA, produced under laboratory conditions in Vietnam, on its pozzolanic activity were investigated in this study. The composition of ash was investigated by laser granulometry and the values of indicators characterizing the dispersion of its particles before and after mechanical activation were established. The content of soluble amorphous silicon oxide in rice husk ash samples was determined by photocolorimetric analysis. The pizzolanic activity of the RHA, fly ash and the silica fume was also compared according to the method of absorption of the solution of the active mineral additive. It is established that the duration of the mechanical activation of rice husk ash by grinding in a vibratory mill is optimal for increasing its pozzolanic activity, since it simultaneously results in the production of the most dispersed ash particles with the highest specific surface area and maximum solubility of the amorphous silica contained in it. Longer grinding does not lead to further reduction in the size of ash particles, which can be explained by their aggregation, and also reduces the solubility of amorphous silica in an aqueous alkaline medium.

Desalination Technology of Water by using Rice Husk Ash

2014 ◽  
Vol 27 (2) ◽  
pp. 148-160
Author(s):  
Hassan K. Hassan ◽  
Najla J. Al-Amiri ◽  
Mohammed M. Yassen
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Desalination Technology

Adsorption of Cr(VI) by material synthesized from red mud and rice husk ash

2018 ◽  
Vol 60 (4) ◽  
pp. 3-7
Author(s):  
Thi To Yen Nguyen ◽  
Phung Anh Nguyen ◽  
Thi Thuy Van Nguyen ◽  
Tri Nguyen ◽  
Ky Phuong Ha Huynh ◽  
...  
Keyword(s):  
Rice Husk ◽  
Red Mud ◽  
Rice Husk Ash

Effect of alkaline treatment on physico-mechanical properties of black rice husk ash filled polypropylene biocomposites

2015 ◽  
Vol 57 (4) ◽  
pp. 370-376 ◽  
Author(s):  
Ahmad Adlie Shamsuri ◽  
Ahmad Khuzairi Sudari ◽  
Edi Syams Zainudin ◽  
Mazlina Ghazali
Keyword(s):  
Mechanical Properties ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Alkaline Treatment ◽  
Black Rice

scholarly journals Study and Use of Rice Husk Ash as a Source of Aluminosilicate in Refractory Coating

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3440
Author(s):  
Mohd Na’im Abdullah ◽  
Mazli Mustapha ◽  
Nabihah Sallih ◽  
Azlan Ahmad ◽  
Faizal Mustapha ◽  
...  
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Agricultural Waste ◽  
Fire Retardant ◽  
Sem Analysis ◽  
Refractory Coating ◽  
Alkyd Paint ◽  
Passive Fire Protection ◽  
In Fire ◽  
Geopolymer Binder

The utilisation of rice husk ash (RHA) as an aluminosilicate source in fire-resistant coating could reduce environmental pollution and can turn agricultural waste into industrial wealth. The overall objective of this research is to develop a rice-husk-ash-based geopolymer binder (GB) fire-retardant additive (FR) for alkyd paint. Response surface methodology (RSM) was used to design the experiments work, on the ratio of RHA-based GB to alkyd paint. The microstructure behaviour and material characterisation of the coating samples were studied through SEM analysis. The optimal RHA-based GB FR additive was formulated at 50% wt. FR and 82.628% wt. paint. This formulation showed the result of 270 s to reach 200 °C and 276 °C temperature at equilibrium for thermal properties. Furthermore, it was observed that the increased contents of RHA showed an increment in terms of the total and open porosities and rough surfaces, in which the number of pores on the coating surface plays an important role in the formation of the intumescent char layer. By developing the optimum RHA-based GB to paint formulation, the coating may potentially improve building fire safety through passive fire protection.

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