scholarly journals Explicit Study of Epoxy/ Momordica Angustisepala Fiber and Rice Husk Ash Nanoparticle Composites for Roofing Sheet Application

2020 ◽  
Vol 44 (6) ◽  
pp. 375-380
Author(s):  
Nwoji Clifford Ugochukwu ◽  
Aigbodion Victor Sunday ◽  
Adams Mohammed Sani ◽  
Obetta Emmanuel Chinonso
Keyword(s):  
Corrosion Resistance ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Epoxy Composite ◽  
Health Hazard ◽  
Long Span ◽  
New Material ◽  
Sustainable Materials ◽  
Nanoparticle Composites ◽  
Explicit Study

The development of roofing sheets using sustainable materials to reduce the health hazard pose by asbestos, corrosion of galvanized zinc, and cost of long span aluminum has been giving attention. In this work, density, tensile properties, corrosion resistance and stress analysis of Momordica angustisepala fiber (MAf) and rice husk ash nanoparticle/epoxy composite was used as criteria to determine the suitability of the new material as a roofing sheet application. Roofing sheets of lower weight can be produced with this developed material. The yield strength and tensile strength of 73.45 and 75.12 MPa are within the strength recommended for galvanized zinc and long span aluminum. The new material can be used in the production of roofing sheets with better corrosion resistance than galvanized zinc and long span aluminum. It was established that light weight roofing sheets with better corrosion resistance can be made with this composite.

Hydration process of rice husk ash cement paste and its corrosion resistance of embedded steel bar

2020 ◽  
Vol 27 (11) ◽  
pp. 3464-3476
Author(s):  
Hui Wang ◽  
Ai-lian Zhang ◽  
Lin-chun Zhang ◽  
Qian Wang ◽  
Yan Han ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Cement Paste ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Hydration Process ◽  
Steel Bar

scholarly journals Research on the Mechanical Strengths and the Following Corrosion Resistance of Inner Steel Bars of RPC with Rice Husk Ash and Waste Fly Ash

Coatings ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1480
Author(s):  
Lili Cui ◽  
Hui Wang
Keyword(s):  
Corrosion Resistance ◽  
Fly Ash ◽  
Rice Husk ◽  
Electrical Resistance ◽  
Rice Husk Ash ◽  
Time History ◽  
Freeze Thaw ◽  
Steel Bars ◽  
Reactive Powder ◽  
Mechanical Strengths

In this paper, the slump flow and mechanical strengths (compressive and flexural strengths) of the reactive powder concrete (RPC) with rice husk ash (RHA) and waste fly ash (WFA) were investigated. The following corrosion resistance of steel bars-reinforced specimens was researched. The ultrasonic sound, the mass loss rate, the electrical resistance, and the electrical resistance time history curves were determined to reflect the corrosion resistance of steel bars. The influence of NaCl freeze–thaw cycles and dry–wet alternations was considered. Results showed that the addition of RHA and WFA demonstrated a negative effect on the fluidity of fresh RPC. The fluidity of fresh RPC with WFA was lower. Moreover, RHA and WFA could effectively improve the mechanical strengths of hardened RPC, and the enhancing effect of RHA was higher. The increasing dosage of RHA could improve the corrosion resistance of steel bars in RPC when the specimens were exposed to the environment of NaCl freeze–thaw cycles and dry–wet alternations. However, when WFA was added, the effect was the opposite. The steel bars in RPC corroded more seriously when the specimens were exposed to the environment of NaCl dry–wet alternations than the environment of NaCl freeze–thaw cycles.

scholarly journals Utilization of Sustainable Materials to Enhance Geotechnical Characteristics of Soils

2018 ◽  
Vol 7 (2.1) ◽  
pp. 54
Author(s):  
Rama Subba Rao, G.V
Keyword(s):  
Rice Husk ◽  
Soil Stabilization ◽  
Rice Husk Ash ◽  
Geotechnical Engineering ◽  
Fine Sand ◽  
Waste Materials ◽  
Engineering Practice ◽  
Geotechnical Characteristics ◽  
Sustainable Materials ◽  
By Products

Geotechnical engineering can noticeably affect the sustainability of infrastructure development because of its beginning place in the construction practice. Utilization of waste materials for enhancing properties of the soil is a wise choice and is also one step towards accomplishing sustainable development. Application of by-products (viz., flay ash and rice husk ash) which could be defined as “sustainable materials”, find special place in the modern-day soil stabilization and modification exercise. The preset paper aims at enhancing properties of expansive soil with inclusion of industrial by-products namely Rice Husk ash and Fly Ash. Further the present paper focuses on improving geotechnical characteristics of fine sand upon reinforcing with ground shredded rubber tire. Fine sand has a low angle of internal friction and which in turn has low shear strength. Reuse of waste materials is one area of research which attempts to makes geotechnical engineering practice sustainable.  

A Study on the Corrosion and Mechanical Properties of an Al6063 Reinforced With Egg Shell Ash and Rice Husk Ash

2018 ◽  
Author(s):  
Nosa Idusuyi ◽  
Peter Ozaveshe Oviroh ◽  
Adetoye Henry Adekoya
Keyword(s):  
Mechanical Properties ◽  
Corrosion Resistance ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Corrosion Behaviour ◽  
Low Cost ◽  
Microstructural Characterization ◽  
Industrial Applications ◽  
Casting Technique ◽  
Egg Shell

Aluminium based metal matrix composites (MMCs) have received considerable attention in the last decade for its potential industrial applications. One of the challenges encountered using Aluminium based MMCs is understanding the influence of the reinforcement particles on the corrosion resistance and mechanical properties. In this study the corrosion behaviour and mechanical properties of Al6063 reinforced with egg shell ash and rice husk ash were investigated. Waste Egg Shell Ash (ESA) and Rice Husk Ash (RHA) 212 μm in size were used to produce the composites with 10 wt% of reinforcements via stir casting technique. The RHA and ESA were added in the ratios of 10:0, 7.5:2.5, 5:5, 2.5:7.5, 0:10. Unreinforced Al6063 was used as baseline material. Immersion tests, potentiodynamic polarization techniques, tensile tests, optical microscopy (OM) and scanning electron microscopy (SEM) were used to characterize the composites. The results showed that reinforcing with 7.5 wt% RHA + 2.5 wt% ESA provided the highest resistance to corrosion. Generally, a reduction in the corrosion rates were observed for the reinforced composites as the wt% of RHA increased. Porosity levels of the composites reduced with an increase in the percentage of ESA in the matrix. Microstructural characterization using SEM and OM revealed a distribution of pits on the composite surfaces which was more severe with increasing RHA percentage. The UTS (ultimate tensile stress) results revealed that the composite containing 10 wt% RHA had the maximum value of 161 MPa. The results demonstrate that rice husk ash and eggshell ash can be useful in producing low cost Aluminium composites with improved corrosion resistance and tensile properties.

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
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