Mortar Effect of Rice Husk Ash Burning on Fluidized Flow and Sliding Grid

The rice in the south of Brazil is one of the main economy activities, which produce a large volume of waste coming from the beneficiation industries. The main goal of this research is evaluate the feasibility of use of rice husk ash, burning on fluidized flow (FF) and sliding grid (SG) for mortars. The characterization methods of rice husk ash (RHA) included loss on ignition, particle size distribution by laser, x-ray diffraction, x-ray fluorescence spectrometer, pozzolanic activity index and specific mass. Mortar specimens were molded with the proportion of 1:3 in mass and water/binder ratio of 0.51. The Portland cement was replaced by RHA with the proportion of 10%, 15% and 20%. Compressive strength, water absorption, air voids content, hydration-releasing heat curves, mercury intrusion porosimetry and scanning electron microscope were performed for all mortars. The mechanical performance of mortar with RHA replacement, shows to be satisfactory and feasible alternative for the final waste disposal.

Download Full-text

Measurement of Pozzolanic Activity Index of Scoria, Pumice, and Rice Husk Ash as Potential Supplementary Cementitious Materials for Portland Cement

Advances in Civil Engineering ◽

10.1155/2017/6952645 ◽

2017 ◽

Vol 2017 ◽

pp. 1-13 ◽

Cited By ~ 9

Author(s):

Hieronimi A. Mboya ◽

Cecil K. King’ondu ◽

Karoli N. Njau ◽

Alex L. Mrema

Keyword(s):

Portland Cement ◽

Rice Husk ◽

Rice Husk Ash ◽

Activity Index ◽

Cementitious Materials ◽

Pozzolanic Activity ◽

Supplementary Cementitious Materials ◽

X Ray Diffraction ◽

X Ray ◽

Setting Times

This work investigated the properties of scoria and pumice as supplementary cementitious materials (SCMs) for Portland cement and compared to those of rice husk ash (RHA). X-ray fluorescence, X-ray diffraction, and pozzolanic activity index (PAI) tests confirmed the suitability of these two materials as potential SCMs. Scoria and RHA samples achieved over 75% PAI at 7 days whereas pumice did this after 28 days. Initial and final mean setting times observed for the composite cement blended with these materials were 166 and 285 min, respectively. These setting times are longer than that of ordinary Portland cement but shorter compared to that of common Portland pozzolana cement. The ultimate mean compressive strengths achieved at 28 days of curing were 42.5, 44.8, and 43.0 MPa for scoria, pumice, and RHA, respectively, signifying that these materials are good SCMs. Higher fineness yielded higher ultimate mean strength. For instance, a scoria sample with a fineness of 575 m2/kg achieved the strength of 52.2 MPa after 28 days.

Download Full-text

Properties of Mortar Containing Rice Husk Ash at Different Temperature and Exposed to Aggressive Environment

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.620.87 ◽

2012 ◽

Vol 620 ◽

pp. 87-93 ◽

Cited By ~ 4

Author(s):

Ramadhansyah Putra Jaya ◽

Mohd Al Amin Muhamad Nor ◽

Zainal Arifin Ahmad ◽

Zakaria Mohd Amin

Keyword(s):

Compressive Strength ◽

Rice Husk ◽

Rice Husk Ash ◽

X Ray Diffraction ◽

X Ray ◽

Compressive Strength Test ◽

Binder Ratio ◽

Different Temperatures ◽

Good Potential ◽

Water To Binder Ratio

The properties of mortar containing rice husk ash at varying temperatures were studied. Three rice husk ash samples were prepared at different temperatures and with various colors, i.e., 600°C (pink), 800°C (grey), and 1000°C (white), all were used for this study. Ordinary Portland cement (OPC), a well known universal binder, was partially replaced with rice husk ash at 10, 15, 20, and 30% by weight of binder. The water to binder ratio (W/B) of the mortar was kept constant at 0.45. The mortars were subjected to seawater or saturated Ca (OH)2 solution. The controlled and exposed mortars were characterized using X-ray diffraction, FTIR spectroscopy and compressive strength test. The results show that the amount of silica present in RHA are varied with burning temperature and colors, approximately in the range of 95 to 97%. White RHA produced higher compressive strength both in seawater and Ca (OH)2 solution. Finally, white RHA with 15% replacement was most suitable to be used as additive in OPC, and showed good potential for use in seawater applications and alkaline environment.

Download Full-text

Development of Ternary Concrete Utilizing Agricultural Waste Material

10.21203/rs.3.rs-1107515/v1 ◽

2022 ◽

Author(s):

Sunita Kumari ◽

Dhirendra Singhal ◽

Rinku Walia ◽

Ajay Rathee

Keyword(s):

Rice Husk ◽

Rice Husk Ash ◽

Agricultural Waste ◽

Xrd Analysis ◽

Sem Analysis ◽

X Ray Diffraction ◽

X Ray ◽

Concrete Mix ◽

Maize Cob

Abstract The present project proposes to utilize rice husk and maize cob husk ash in the cement to mitigate the adverse impact of cement on environment and to enhance the disposal of waste in a sustainable manner. Ternary concrete / MR concrete was prepared by using rise husk and maize cob ash with cement. For the present project, five concrete mixes MR-0 (Control mix), MR-1 (Rice husk ash 10% and MR-2.5%), MR-2 (Rice husk ash 10% and MR-5%), MR-3 (Rice husk ash 10% and MR-2.5%), MR-4 (Rice husk ash 10% and MR-2.5%) were prepared. M35 concrete mix was designed as per IS 10262:2009 for low slump values 0-25mm. The purpose is to find the optimum replacement level of cement in M35 grade ternary concrete for I – Shaped paver blocks.In order to study the effects of these additions, micro-structural and structural properties test of concretes have been conducted. The crystalline properties of control mix and modified concrete are analyzed by Fourier Transform Infrared Spectroscope (FTIR), Scanning Electron Microscopy (SEM), and X-Ray Diffraction (XRD). The results indicated that 10% Rice husk ash and 5% maize cob ash replaced with cement produce a desirable quality of ternary concrete mix having good compressive strength. The results of SEM analysis indicated that the morphology of both concrete were different, showing porous structure at 7 days age and become unsymmetrical with the addition of ashes. After 28 day age, the control mix contained more quantity of ettringite and became denser than ternary concrete. XRD analysis revealed the presence of portlandite in large quantity in controlled mix concrete while MR concrete had the partially hydrated particle of alite.

Download Full-text

CHARACTERISTIC OF XONOTLITE SYNTHESIZED BY HYDROTHERMAL REACTION USING RICE HUSK ASH AND ITS APPLICATION TO ABSORB CHROME (III) SOLUTION

Materiali in tehnologije ◽

10.17222/mit.2021.233 ◽

2021 ◽

Vol 55 (6) ◽

Author(s):

Trung Kien Pham ◽

Tran Ngo Quan

Keyword(s):

Rice Husk ◽

Rice Husk Ash ◽

Hydrothermal Reaction ◽

Mekong Delta ◽

Molar Ratio ◽

X Ray ◽

Vis Spectroscopy ◽

Xrf Scanning ◽

Before And After ◽

Chrome Iii

In this paper, we report on synthesizing xonotlite, calcium silicate hydrate (CSH), via a hydrothermal reaction using rice husk from the Mekong Delta, Vietnam. The rice husks were burnt at 1000 °C for 3 h. Grey rice husk ash was collected, then mixed with Ca(OH)2 at a Ca/Si molar ratio of 1 : 1. This was followed by a hydrothermal reaction at 180 °C for 24 h and 48 h to obtain the xonotlite mineral. Before and after adsorption, 3-mm xonotlite pellets were thoroughly characterized using X-ray diffractometry (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM) and ultraviolet-visible (UV-VIS) spectroscopy. This material has potential application in chromium(III) removal during a chrome-plating process. The adsorption efficiency of the 3-mm pellet samples reached more than 76 % after 12 h.

Download Full-text

Comparison between Rice Husk Ash and Commercial Silica as Filler in Polymeric Composites

Materials Science Forum ◽

10.4028/www.scientific.net/msf.869.209 ◽

2016 ◽

Vol 869 ◽

pp. 209-214 ◽

Cited By ~ 1

Author(s):

Iara Janaína Fernandes ◽

Daiane Calheiro ◽

Emanuele Caroline Araújo dos Santos ◽

Roxane Oliveira ◽

Tatiana Louise Avila de Campos Rocha ◽

...

Keyword(s):

Rice Husk ◽

Rice Husk Ash ◽

Polymeric Materials ◽

Fluidized Bed Reactor ◽

Specific Weight ◽

High Energy ◽

Loss On Ignition ◽

X Ray Diffraction ◽

X Ray ◽

Different Sources

The use of rice husk ash (RHA) as filler in polymeric materials has been studied in different polymers. Research reported that RHA may successfully replace silica. The silica production process using ore demands high energy input and produces considerable amounts of waste. Therefore, the replacement of silica by RHA may be economically and environmentally advantageous, reducing environmental impact and adding value to a waste material. In this context, this study characterizes and compares RHA of different sources (moving grate and fluidized bed reactor) with commercially available silicas to assess performance as filler in polymeric materials. Samples were characterized by X-ray fluorescence, loss on ignition, X-ray diffraction, grain size, specific surface area, specific weight, and scanning electron microscopy. The results show that RHA may be used as a filler in several polymeric materials.

Download Full-text

Bacterial Compatibility/Toxicity of Biogenic Silica (b-SiO2) Nanoparticles Synthesized from Biomass Rice Husk Ash

Nanomaterials ◽

10.3390/nano9101440 ◽

2019 ◽

Vol 9 (10) ◽

pp. 1440 ◽

Cited By ~ 2

Author(s):

Sanjeev K. Sharma ◽

Ashish R. Sharma ◽

Sudheer D. V. N. Pamidimarri ◽

Jyotshana Gaur ◽

Beer Pal Singh ◽

...

Keyword(s):

Rice Husk ◽

Photoelectron Spectroscopy ◽

Biogenic Silica ◽

Rice Husk Ash ◽

Sio2 Nanoparticles ◽

High Porosity ◽

Xps Spectra ◽

X Ray ◽

Xrd Patterns ◽

Sio2 Nanopowder

Biogenic silica (b-SiO2) nanopowders from rice husk ash (RHA) were prepared by chemical method and their bacterial compatibility/toxicity was analyzed. The X-ray diffractometry (XRD) patterns of the b-SiO2 nanopowders indicated an amorphous feature due to the absence of any sharp peaks. Micrographs of the b-SiO2 revealed that sticky RHA synthesized SiO2 nanopowder (S1) had clustered spherical nanoparticles (70 nm diameter), while b-SiO2 nanopowder synthesized from red RHA (S2) and b-SiO2 nanopowder synthesized from brown RHA (S3) were purely spherical (20 nm and 10 nm diameter, respectively). Compared to the S1 (11.36 m2g−1) and S2 (234.93 m2g−1) nanopowders, the S3 nanopowders showed the highest surface area (280.16 m2g−1) due to the small particle size and high porosity. The core level of the X-ray photoelectron spectroscopy (XPS) spectra showed that Si was constituted by two components, Si 2p (102.2 eV) and Si 2s (153.8 eV), while Oxygen 1s was observed at 531.8 eV, confirming the formation of SiO2. The anti-bacterial activity of the b-SiO2 nanopowders was investigated using both gram-positive (Escherichia coli) and gram-negative (Staphylococcus aureus) microorganisms. Compared to S2 and S3 silica nanopowders, S1 demonstrated enhanced antibacterial activity. This study signifies the medical, biomedical, clinical, and biological importance and application of RHA-mediated synthesized b-SiO2.

Download Full-text

Preparation and characterization of rice husk ash (RHA)-TiO2 / ZnO composites and its application in treating effluents from textile industries

Bangladesh Journal of Scientific and Industrial Research ◽

10.3329/bjsir.v47i4.14075 ◽

2013 ◽

Vol 47 (4) ◽

pp. 445-448 ◽

Cited By ~ 2

Author(s):

MH Kabir ◽

MF Kabir ◽

F Nigar ◽

S Ahmed ◽

AI Mustafa ◽

...

Keyword(s):

Composite Materials ◽

Rice Husk ◽

Rice Husk Ash ◽

Textile Dye ◽

X Ray ◽

Textile Dye Effluent ◽

Degradation Reaction ◽

D Values ◽

Sun Light

Photocatalytic composite materials incorporating the photocatalysts (TiO2, ZnO) with rice husk ash (RHA) have been developed to investigate the photodegradation of real textile dye effluent. The structural characterization of the composite materials was performed using XRD (X-Ray Diffractometer). The characteristic XRD peaks together with the 2? values for both TiO2 and ZnO were in excellent agreement with the standard JCPDS d-values. The efficacy of these composites was examined through the degradation of a textile dye, collected from a local dye house. The sun light was used as the source of illumination for the preceding degradation reaction. Bangladesh J. Sci. Ind. Res. 47(4), 445-448, 2012 DOI: http://dx.doi.org/10.3329/bjsir.v47i4.14075

Download Full-text

Solidification and Leachability of Cr (VI) in Rice Husk Ash-Blended Cement

ISRN Civil Engineering ◽

10.5402/2011/183158 ◽

2011 ◽

Vol 2011 ◽

pp. 1-6 ◽

Cited By ~ 5

Author(s):

Neeraj Jain

Keyword(s):

Rice Husk ◽

Rice Husk Ash ◽

Setting Time ◽

Blended Cement ◽

X Ray Diffraction ◽

Retention Capacity ◽

Allowable Limit ◽

X Ray ◽

Curing Period ◽

Leaching Procedure

Investigations carried out to study the effect of Cr (VI) (1000–3000 mg/l) on solidification and hydration behavior of Ordinary Portland cement (OPC) and rice husk ash (RHA) blended (10%, 20%, and 30%) cement show that addition of RHA accelerates final setting as compared to control samples (OPC) and retardation in setting time has been observed on increase in rice husk ash concentration (10%–30%). Solidification studies show that the compressive strength of controls and rice husk ash blended samples increases with increase in the curing period and maximum strength was observed with 20% RHA blended samples. With the increase in Cr (VI) concentrations, the strength of OPC and RHA blended samples decreases as compared to controls (without chromium). The results of Toxicity Characteristics Leaching Procedure (TCLP) test, (pH≅3), show that the retention capacity of OPC and RHA blended samples was in the range of 92% to 99% and the leached Cr (VI) concentration was under the allowable limit (5 mg/l) of U.S. EPA. The chemistry of influence of Cr (VI) on hydration of cement was examined by X-ray diffraction which shows the formation of various crystalline phases during solidification in rice hush ash blended cement.

Download Full-text

Variables Involved in the Planting of Rice in the Rice Husk

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.517.430 ◽

2012 ◽

Vol 517 ◽

pp. 430-436

Author(s):

J.L. Akasaki ◽

E.J. Silva ◽

L.C. Sousa ◽

J.L.P. Melges ◽

M.M. Tashima ◽

...

Keyword(s):

Rice Husk ◽

Large Scale ◽

Rice Husk Ash ◽

Scale Production ◽

X Ray Diffraction ◽

X Ray ◽

Large Scale Production ◽

Pozzolanic Materials ◽

Different Strains ◽

Different Origins

Rice production in Brazil in 2010 was approximately 12,2 million tons, and to reach that amount several planting techniques were used with different strains of rice in different rice-growing areas. Since Rice Husk Ash (RHA) is the pozzolan of vegetable origin most studied by researchers working in the area of pozzolanic materials, the present paper evaluates the influence that the form of planting, the climate, the soil, the strain of rice and the origin/amount of nitrogen-based fertilizers used in rice cultivation has on the chemical composition and crystallographic properties of RHA. The results obtained in this paper, confirm the importance of carrying out routine chemical analysis and X-Ray diffraction to maintain the quality control of the CCAs produced, because in situations of large-scale production, husks of different origins may be used.

Download Full-text

Effects of Rice Husk Ash–Magnesium Oxide Addition on Wear Behavior of Aluminum Alloy Matrix Hybrid Composites

Tikrit Journal of Engineering Sciences ◽

10.25130/tjes.25.4.04 ◽

2018 ◽

Vol 25 (4) ◽

pp. 15-22

Author(s):

Abbas Y. Awad ◽

Mohammed N. Ibrahim ◽

Mohamed K. Hussein

Keyword(s):

Aluminum Alloy ◽

Wear Rate ◽

Apparent Density ◽

Rice Husk ◽

Applied Load ◽

Rice Husk Ash ◽

Hybrid Composites ◽

Wear Behavior ◽

X Ray Diffraction ◽

X Ray

A336.0 aluminum alloy used to fabricate hybrid composites using rice husk ash (RHA) and MgO particles as reinforcement. The influence of the particles on the wear behavior of A336.0 aluminum alloy as a matrix that reinforced with MgO and RHA was investigated. Firstly, the rice husk burned at 700°C and then heat treated at 1100°C for 2 hrs. The ash characterized by X-ray florescence and X-ray diffraction. Less than 53 and 125 micron are the particle sizes of MgO and RHA respectively. The hybrid composites manufactured using stir casting method in two steps. A336.0 aluminum alloy reinforced with 4:0, 3:1, 2:2, 1:3 and 0:4 of RHA: MgO with 10 wt% total reinforcement phase. Optical microscope and X-ray diffraction were used to characterize the prepared hybrid composites. Dry sliding wear, hardness, apparent density, percentage of porosity and coefficient of friction were examined. Results indicated that porosity, apparent density and hardness enhanced with increasing MgO, while increasing wt% of RHA decreased the apparent density. Results indicated that with inceasing the applied load the wear rate of the composites was enhanced. Coefficient of friction varies inversely with applied load and wt% of RHA. Hardness increased with increasing RHA while the friction coefficient and the wear rate decreased. The minimum wear rates were at 10% RHA and Al-alloy-(RHA-MgO) [3:1] composites, while the minimum friction coefficients were at 10% RHA composites.

Download Full-text