scholarly journals Pozzolanic Reaction Mechanism of Rice Husk Ash in Concrete – A Review

2015 ◽  
Vol 773-774 ◽  
pp. 1143-1147 ◽  
Author(s):  
Siti Asmahani Saad ◽  
Mohd Fadhil Nuruddin ◽  
Nasir Shafiq ◽  
Maisarah Ali
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Agricultural Waste ◽  
Concrete Strength ◽  
Short Review ◽  
Pozzolanic Reaction ◽  
Milling Process ◽  
Strength Development ◽  
Pulverized Fuel ◽  
Rice Milling

Recently, incorporation of cement replacement material (CRM) in concrete has gained considerable attention throughout the world. It is known that the commonly used CRM in current concrete industry is silica fume (SF), pulverized fuel ash (PFA) and rice husk ash (RHA). RHA is an agricultural waste from rice milling process. Rice farming activities is one of the main crops planted in Malaysia and therefore, the rice husk abundantly generated every year. RHA exhibits positive pozzolanic reaction during concrete strength development. The material contains amorphous silica and hence it contributed towards enhancement of various concrete properties. This paper presents a short review of RHA properties as CRM and pozzolanic reaction determination.

Effect of Milling Process for Rice Husk Ash on Mechanical Strength of Blended Portland Cement Mortars

2014 ◽  
Vol 600 ◽  
pp. 240-249
Author(s):  
Everton Jose da Silva ◽  
Maria Lidiane Marques ◽  
Antonio Rogério B. Vasconcelos ◽  
Jorge L. Akasaki ◽  
Mauro M. Tashima ◽  
...  
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Agricultural Waste ◽  
Research Area ◽  
Milling Process ◽  
Low Carbon ◽  
Waste Products ◽  
Pozzolanic Reactivity ◽  
Cement Mortars ◽  
Sugar Cane Bagasse Ash

Nowadays, the reuse of waste products in the construction process is a priority research area. Several industrial and agricultural waste products have been investigated, such as fly ash, sugar cane bagasse ash and rice husk ash. This paper analyzes a very important aspect under intense discussion in the scientific community: the Rice Husk Ash (RHA) grinding process. This paper investigates a low carbon RHA with high pozzolanic reactivity produced under uncontrolled burning conditions. The compressive strength of mortar specimens prepared using both ground and natural RHA were tested for 3-56 days and the capillarity absorption was measured for mortars cured during 28 days. Very promising and interesting results were obtained using natural rice husk ash in the production of blended mortars.

A Short Review on Fly Ash, Rice Husk Ash and Rice Husk Composites

2021 ◽  
Vol 9 (7) ◽  
pp. 841-845
Author(s):  
Aniket Mahadeo Kunbithop
Keyword(s):  
Composite Material ◽  
Fly Ash ◽  
Rice Husk ◽  
Automobile Industry ◽  
Industrial Waste ◽  
Energy Production ◽  
Rice Husk Ash ◽  
Agricultural Waste ◽  
Short Review

Fly ash is generated during the combustion of coal and rice husk ash is generated by the combustion of rice husk for energy production. Fly ash is industrial waste and rice husk ash is agricultural waste that is widely available worldwide. The utilization of fly ash, rice husk and rice husk ash in various applications has done a great deal to solve the waste problem. The present paper gives a short review of the utilization of fly ash, rice husk and rice husk ash as a composite material. The developed composite material is used in various applications, such as in the automobile industry and in other applications

scholarly journals Thermal performance of Rice Husk Ash mixed mortar in concrete and masonry buildings

2020 ◽  
Vol 19 (4) ◽  
pp. 043-052
Author(s):  
Kajanan Selvaranjan ◽  
J.C.P.H. Gamage ◽  
G.I.P. De Silva ◽  
Vajira Attanayaka
Keyword(s):  
Thermal Conductivity ◽  
Rice Husk ◽  
Thermal Performance ◽  
Amorphous Silica ◽  
Rice Husk Ash ◽  
Agricultural Waste ◽  
Milling Process ◽  
Masonry Buildings ◽  
Wide Range ◽  
Mixed Mortar

Rice Husk (RH) is an agricultural waste which is produced in huge amounts from the milling process of paddy rice. Rice Husk Ash (RHA) is a by-product material obtained from the combustion of rice husk. The amorphous silica-rich RHA (84-90 wt%) has a wide range of applications. This research focused on the possibility of utilizing RHA in the process of developing a mortar with low thermal conductivity to enhance the thermal comfort in concrete and masonry buildings. The thermal conductivity of mortar was determined by Lee’s Disc method, and the results were compared to the data for conventional mortar as well as commercial thermal insulation materials. The results indicate a significant reduction in thermal conductivity in the mortar developed with RHA

scholarly journals Analysis of Strength Development and Soil–Water Characteristics of Rice Husk Ash–Lime Stabilized Soft Soil

Materials ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 3873 ◽  
Author(s):  
Jiang ◽  
Huang ◽  
Ma ◽  
Luo
Keyword(s):  
Soil Water ◽  
Rice Husk ◽  
High Efficiency ◽  
Rice Husk Ash ◽  
Agricultural Waste ◽  
Soft Soil ◽  
Strength Development ◽  
Water Characteristics ◽  
Stabilized Soil ◽  
Curing Agents

With increased awareness of environmental protection, the output of traditional curing agents such as cement and lime is less and less, so it is urgent to develop new curing agents with high efficiency and environmental benefits. Thus, this study aims at investigating the application of rice husk ash (RHA) from agricultural waste to the soft soil stabilization. A series of tests are conducted to analyze the strength development process and soil–water characteristics of rice husk ash–lime (RHA–lime) stabilized soils. The results of the strength tests showed that by increasing the content of RHA, the unconfined compressive strength (UCS) and splitting strength of stabilized soils increased first and then decreased. The effective shear strength indexes of the three soil types (soft soil, lime-stabilized soil, and RHA–lime soil) are measured and compared. It is found that RHA can effectively improve the shear resistance and water resistance of stabilized soil. The results of methylene blue test demonstrated that RHA can also promote the reduction of the specific surface area and swelling potential energy of lime-stabilized soil. In addition, the influence of RHA on mineral composition and morphology change in stabilized soils is studied at the microscopic level. The X-ray diffraction tests and scanning electron microscope (SEM) tests showed that strength development and change of soil–water properties of RHA–lime stabilized soil are attributed to enhanced cohesion by cementation and pores filling with agglomerated mineral.

scholarly journals Compressive Strength and Microstructure Analysis of Treated Rice Husk Ash (TRHA) Incorporated Mortar

2018 ◽  
Vol 7 (4.35) ◽  
pp. 388
Author(s):  
Siti Asmahani Saad ◽  
Nasir Shafiq ◽  
Mariana Mohamed Osman ◽  
Siti Aliyyah Masjuki
Keyword(s):  
Compressive Strength ◽  
Rice Husk ◽  
Treatment Process ◽  
Rice Husk Ash ◽  
Concrete Strength ◽  
Pozzolanic Reaction ◽  
Cement Matrix ◽  
Curing Period ◽  
Strength Increment ◽  
Effective Additive

High amount of reactive silica is ubiquitous in pozzolanic reaction for concrete strength increment. Rice husk ash (RHA) is proven contains high content of amorphous silica that is essential in the pozzolanic reaction of effective additive in concrete. Nevertheless, incorporation of RHA as cement replacement material (CRM) or additive is very minimal in current concrete industry. Therefore, improvement on the RHA properties by introduction of thermal and chemical pretreatment prior to incineration process is considered as a promising way in order to achieve the goal. This treatment process has been reported widely in literature. In this paper, the effect of treated rice husk ash (TRHA) and non-treated rice husk ash (NTRHA) incorporated mortar in terms of its compressive strength and microstructure properties are examine subsequently. The strength activity of TRHA from the optimum treatment process was measured by testing the compressive strength of mortars. The highest compression value obtained was 50.73MPa with 3% UFTRHA replacement at 28 days. At a longer curing period i.e. 90 days, it was recorded that 3% of UFTRHA mortar had the highest compression value at 53.87MPa. As for microstructure properties, a denser microstructure with excellent aggregate bonding and cement matrix in the interfacial transition zone (ITZ) was observed.

scholarly journals Analysis by Means of Surface Response to Chemical Composition and Pozzolanic Reactivity of Ultrafine Treated Rice Husk Ash (UFTRHA) as Cementing Additive Material

2018 ◽  
Vol 7 (4.35) ◽  
pp. 342
Author(s):  
Siti Asmahani Saad ◽  
Nasir Shafiq ◽  
Maisarah Ali ◽  
Mariana Mohamed Osman
Keyword(s):  
Statistical Analysis ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Concrete Strength ◽  
Pozzolanic Reaction ◽  
Concrete Technology ◽  
Reactive Material ◽  
Technology Application ◽  
Independent Variables ◽  
Hcl Concentration

Pozzolanic reactive material is considered as one of the most essential characteristic of cementing additive material in concrete technology application. Normally, the reactive material contains abundant silica that enhances concrete strength activity. Undeniably, it is proven that rice husk ash (RHA) possesses large quantity of silica that induces the pozzolanic reaction in concrete. Nevertheless, usage of conventional RHA is still widely accepted in concrete industry nowadays. One of the setback of conventional RHA incorporation is simply because of its properties inconsistency. Therefore, enhancement on the RHA properties by introduction of a specific pretreatment prior to incineration process is expected to provide an alternative way in order to produce highly reactive cementing additive material from locally available agricultural by-product, the rice husk. In this paper, a total number of 30 experimental set points was conducted. Statistical analysis was conducted for four independent variables and two responses using Response Surface Method (RSM). The analysis was completed using a commercial software set (Design-Expert) for experimental design and analysis. The independent variables were HCl concentration, soaking time, burning temperature and soaking temperature. Meanwhile, the responses investigated in this study were including cumulative pozzolan percentage and electric conductivity decrement from 0 to 2 minutes. As for the statistical analysis of the data for response 1, the cumulative pozzolan percentage calculated from the model was in-line with the experimental data, with R-squared value of 0.9565. Hence, the result validates the precision of the model. On the other hand, the R-squared value for response 2 which is the EC decrement from 0 - 2 Minutes, it shows that the model was in agreement to the experimental values at 0.9342. Thus, it is again justifies the model accuracy.

scholarly journals Properties of Partially Replaced Cement Concrete with Rice Husk Ash

2021 ◽  
Vol 10 (6) ◽  
pp. 86-90
Author(s):  
Rochak Pandey ◽  
Shailendra Kumar
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Pulse Velocity ◽  
Milling Process ◽  
Strength Test ◽  
Test Results ◽  
Cement Concrete ◽  
Strength Parameters ◽  
Rice Milling ◽  
Concrete Matrix

This study investigates the progressions in mechanical properties of concrete by substitution of cement by Rice Husk Ash (RHA) in conjunction with superplasticizers. Rice husk is a by-product of the rice milling process, with inexact generation of 200 kg for every one ton of rice. Diffusion of Rice Husk Ash in the concrete matrix enhance the properties of the concrete. This investigation has been done to determine the strength parameters of concrete with various extents of cement supplemented by Rice Husk Ash. M20 grade concrete (Designed as per Indian standards) was tried with substitutions by weight of the cement amount by 2.5%, 5%, 7.5%, 10% and 15%. Various strength Test results reveal enhancement of strength at 5% substitution of cement by rice husk with compressive strength and flexural strength having an increment of 9.78% and 25.09% respectively as compared to the control mix. Pulse velocity test of the modified concrete at 5% replacement of cement by rice husk ash confirms it as a “good” dense Concrete matrix.

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.

Development of Ternary Concrete Utilizing Agricultural Waste Material

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.

scholarly journals Strength and Durability Performance of Alkali-Activated Rice Husk Ash Geopolymer Mortar

2014 ◽  
Vol 2014 ◽  
pp. 1-10 ◽  
Author(s):  
Yun Yong Kim ◽  
Byung-Jae Lee ◽  
Velu Saraswathy ◽  
Seung-Jun Kwon
Keyword(s):  
Compressive Strength ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Polymerization Reaction ◽  
Strength Development ◽  
Geopolymer Concrete ◽  
Portland Cement Concrete ◽  
Mix Proportion ◽  
Strength And Durability ◽  
Alkali Activated

This paper describes the experimental investigation carried out to develop the geopolymer concrete based on alkali-activated rice husk ash (RHA) by sodium hydroxide with sodium silicate. Effect on method of curing and concentration of NaOH on compressive strength as well as the optimum mix proportion of geopolymer mortar was investigated. It is possible to achieve compressive strengths of 31 N/mm2and 45 N/mm2, respectively for the 10 M alkali-activated geopolymer mortar after 7 and 28 days of casting when cured for 24 hours at 60°C. Results indicated that the increase in curing period and concentration of alkali activator increased the compressive strength. Durability studies were carried out in acid and sulfate media such as H2SO4, HCl, Na2SO4, and MgSO4environments and found that geopolymer concrete showed very less weight loss when compared to steam-cured mortar specimens. In addition, fluorescent optical microscopy and X-ray diffraction (XRD) studies have shown the formation of new peaks and enhanced the polymerization reaction which is responsible for strength development and hence RHA has great potential as a substitute for ordinary Portland cement concrete.

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