scholarly journals Influence of Microwave Incinerated Rice Husk Ash on Hydration of Foamed Concrete

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
R. Bayuaji ◽  
M. F. Nuruddin
Keyword(s):  
Working Conditions ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Taguchi Approach ◽  
Loss On Ignition ◽  
Degree Of Hydration ◽  
Concrete Mixtures ◽  
Foamed Concrete ◽  
Optimum Working ◽  
Water Contents

This research explains the results of an investigation carried out to understand the influence of a microwave incinerated rice husk ash (MIRHA) powder on foamed concrete (FC) hydration. The experimental work was designed using the Taguchi approach. This method was selected to have a target for the optimum working conditions of the parameter that affects some physical properties of concrete mixtures. The loss on ignition (LOI) method was used to establish the nonevaporable water (wn) content at all selected ages of hydration. It was observed that the MIRHA powder showed lower nonevaporable water contents than the normal FC, indicating that MIRHA powder facilitated enhancement in FC hydration. The optimum FC properties were achieved at 10% MIRHA composition as proven from the highest compressive strength. This level corresponds to the highest values in change in nonevaporable water and degree of hydration.

scholarly journals Optimization of nanostructured/nano sized rice husk ash preparation

2020 ◽  
Vol 17 (3(Suppl.)) ◽  
pp. 0953
Author(s):  
Medhat Mostafa ◽  
Hamdy Salah ◽  
Amro B. Saddek ◽  
Nabila Shehata
Keyword(s):  
Particle Size ◽  
Rice Husk ◽  
Amorphous Silica ◽  
Particle Shape ◽  
Rice Husk Ash ◽  
Loss On Ignition ◽  
Shape Distribution ◽  
Disk Mill ◽  
Grinding Time

The objective of the study is developing a procedure for production and characterization of rice husk ash (RHA). The effects of rice husk (RH) amount, burning/cooling conditions combined with stirring on producing of RHA with amorphous silica, highest SiO2, lowest loss on ignition (LOI), uniform particle shape distribution and nano structured size have been studied. It is concluded that the best amount is 20 g RH in 125 ml evaporating dish Porcelain with burning for 2 h at temperature 700 °C combined with cooling three times during burning to produce RHA with amorphous silica, SiO2 90.78% and LOI 1.73%. On the other hand, cooling and stirring times affect the variation of nano structured size and particle shape distribution. However, no crystalline phases were found in RHA in all cases. Results proved that the Attritor ball mill was more suitable than vibration disk mill for pulverizing nano structured RHA with 50% of particle size (D50) lower than 45 mm and 99 % of particle size (D99) lower than 144 mm to nanosized RHA with D50 lower than 36 nm and D99 lower than 57 nm by grinding time 8.16 min to every 1 g RHA without changes in morphousity of silica.

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

2016 ◽  
Vol 869 ◽  
pp. 209-214 ◽  
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.

scholarly journals An investigation of Crater Diameter on Plain Slab Foamed Concrete Rice Husk Ash (FCRHA) Exposed to Low Impact Loading

2017 ◽  
Vol 103 ◽  
pp. 02025
Author(s):  
Josef Hadipramana ◽  
Abdul Aziz Abdul Samad ◽  
Shahrul Niza Mokhatar ◽  
Fetra Venny Riza ◽  
Noridah Mohamad ◽  
...  
Keyword(s):  
Rice Husk ◽  
Impact Loading ◽  
Rice Husk Ash ◽  
Crater Diameter ◽  
Foamed Concrete

scholarly journals Penelitian Beton dengan Penambahan Abu Sekam Padi dan Limbah Keramik sebagai Substitusi Semen

2020 ◽  
Vol 3 (2) ◽  
pp. 275
Author(s):  
Olyndia Febrianita ◽  
Ahmad Ridwan ◽  
Yosef Cahyo Setianto Poernomo
Keyword(s):  
Compressive Strength ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Cylindrical Specimen ◽  
National Standard ◽  
Construction Sector ◽  
Ceramic Waste ◽  
Concrete Mixtures ◽  
Compressive Strength Of Concrete ◽  
Average Compressive Strength

Concrete is a technology that continues to develop in the construction sector. Continues to increase in terms of cost. The need for materials to form concrete requires innovation in the use of concrete mixtures. One of them is using the innovation of rice husk ash and ceramic waste. These ingredients is held in the cement content, namely rice husk ash containing silica and ceramic waste containing alumina. The method used refers to the Indonesian National Standard with a cylindrical specimen measuring 15x30 cm tested at 28 days, and the planned quality is fc '14.5 Mpa. The research objective was to determine the compressive strength and slump value by adding a mixture of rice husk ash 3%, 6%, 9%, 12%, and ceramic waste 3% by weight of cement. The results showed that the slump value decreased with the lowest value of 13.5 cm. the results of the compressive strength of concrete with the addition of rice husk ash and ceramic waste have not achieved the planned quality. The average compressive strength that has the highest value is the addition of 9% rice husk ash with 9% ceramic waste, namely 6.53 Mpa.Beton merupakan salah satu teknologi yang terus berkembang di bidang konstruksi. Terus meningkat dari segi biaya, Kebutuhan bahan untuk membentuk beton membutuhkan inovasi dalam penggunaan campuran beton. Salah satunya dengan inovasi pemanfaatan abu sekam padi dan limbah keramik. Bahan tersebut tertahan di dalam kandungan semen yaitu abu sekam padi yang mengandung silika dan limbah keramik yang mengandung alumina. Metode yang digunakan mengacu pada Standar Nasional Indonesia dengan spesimen silinder berukuran 15x30 cm yang diuji pada 28 hari, dan kualitas yang direncanakan adalah fc '14 .5 Mpa. Tujuan penelitian untuk mengetahui kuat tekan dan nilai slump dengan menambahkan campuran abu sekam padi 3%, 6%, 9%, 12%,   dan   limbah   keramik   3%   dari   berat  semen.   Hasil Penelitian menunjukkan nilai slump mengalami penurunan dengan nilai terendah 13,5cm. Hasil kuat tekan beton dengan penambahan abu sekam padi dan limbah keramik belum mencapai kualitas yang direncanakan. Kuat tekan rata-rata yang memiliki nilai tertinggi adalah penambahan abu sekam 9% dengan limbah keramik 9% yaitu 6,53 Mpa

Effect of Uncontrolled Burning Rice Husk Ash in Foamed Concrete

2012 ◽  
Vol 626 ◽  
pp. 769-775 ◽  
Author(s):  
Josef Hadipramana ◽  
Abdul Aziz Abdul Samad ◽  
Ahmad Zaidi Ahmad Mujahid ◽  
Noridah Mohammad ◽  
Fetra Venny Riza
Keyword(s):  
Compressive Strength ◽  
Chemical Composition ◽  
Cement Paste ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Amorphous Material ◽  
Fine Aggregate ◽  
Interfacial Zone ◽  
Wide Range ◽  
Foamed Concrete

Recently, foamed concrete has become a popular construction material that can be used in wide range of constructions application. Whilst the Rice Husk Ash (RHA) as agro-waste is contain high amount of silicon dioxide. RHA is produced in significant amount every year from agriculture countries. RHA has potential as a material to produce foamed concrete. In this research RHA has been used as a replacement for fine aggregate which used in construction as ordinary concrete material. In this study, foamed concrete with target density 1400, 1600 and 1800 kg/m3 has been produced. The compressive strength of foamed concrete with RHA has been tested. Concrete with Ratio 1:3 of RHA/Sand has higher compressive strength than ratios 3:1 and 2:2 of RHA/sand for every density. XRD and XRF test has been used to determinate chemical composition and crystalline structure of RHA. The result showed that RHA is an amorphous material which amorphous is important thing to pozzolanic process when hydration of cement paste. SEM and EDS test has been conducted to determine microstructure and chemical composition on microstructure of RHA foamed concrete. Amorphous RHA incorporating cement paste produces pozzolanic reaction. It is reduces the porosity and width of interfacial zone in such a way the density is increase.

scholarly journals Characterization and use of swine deep bedding ashes in cementitious composites

2012 ◽  
Vol 32 (5) ◽  
pp. 810-821 ◽  
Author(s):  
Débora C. G. de Oliveira ◽  
Michelle S. Rodrigues ◽  
Sérgio F. dos Santos ◽  
Holmer Savastano Junior
Keyword(s):  
Portland Cement ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Partial Replacement ◽  
Loss On Ignition ◽  
X Ray Diffraction ◽  
Specific Density ◽  
X Ray ◽  
Controlled Burning ◽  
Rural Construction

The deep bedding is a swine alternative production, especially in the finishing phase, whose byproduct can be recycled, reducing the environmental impact. The objectives of this study were to characterize the ash coming from the controlled burning of the swine deep bedding (SDBA) based on rice husk, and to evaluate their performance in composites as a partial substitute for Portland cement (PC). To measure the differences between SDBA and rice husk ash (RHA) as a reference, we have characterized: particle size distribution, real specific density, x-ray diffraction, electrical conductivity, scanning electron microscopy, chemical analysis and loss on ignition. Samples were prepared for two experimental series: control, and another one with the partial replacement of 30% of SDBA in relation to the mass of the Portland cement. According to the results obtained for physical and mechanical characterization, the composites with SDBA can be used as a constructive element in the rural construction.

Contribution of RHA Granules as Filler to Improve the Impact Resistance of Foamed Concrete

2013 ◽  
Vol 594-595 ◽  
pp. 93-97 ◽  
Author(s):  
Josef Hadipramana ◽  
Abdul Aziz Abdul Samad ◽  
Ahmad Zaidi Ahmad Mujahid ◽  
Noridah Mohamad ◽  
Fetra Venny Riza
Keyword(s):  
Chemical Composition ◽  
Rice Husk ◽  
Impact Loading ◽  
Rice Husk Ash ◽  
Impact Resistance ◽  
Fine Aggregate ◽  
Foamed Concrete ◽  
Aerated Concrete ◽  
The Impact

Foamed concrete as aerated concrete widely used in range of constructions application, no exception to structure shield. As structure shield is important to resist on impact loading. Whilst, Rice Husk Ash (RHA) as agro-waste potentials as filler for foamed concrete. RHA that is produced by uncontrolled burning under 700oC during ± 6 hours obtain the granules contain the carbon and porous. The granules of RHA may fill the porous in matrix foamed concrete without remove the characteristic the foamed concrete its self-as aerated concrete. This investigation RHA has been used as a replacement for fine aggregate. Target density 1800 kg/m3of foamed concrete both of with and without RHA have been produced to compare their strength and characteristic of impact resistance. SEM and EDS test has been conducted to determine microstructure and chemical composition of foamed concrete with RHA. The results showed that granules of RHA filled the porous and bonded with the denser part into matrix. The presence of granules of RHA has been changing the role of the air cell of porous in foamed concrete when it was subjected to impact loading. Also the granules of RHA give the foamed concrete denser without losing its characteristic of porous entirely.

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