Effect Of Rice Husk Ash Research Articles

Experimental investigation of Rice Husk Ash on compressive strength, carbonation and corrosion resistance of reinforced concrete

ABSTRACT Reinforcement corrosion in concrete has become a major factor affecting durability of reinforced concrete structures. Corrosion of reinforcement is a continuous process. It cannot be eliminated completely. But its rate can be prevented with the help of corrosion inhibitors, either by acting as a barrier, by forming an adsorbed layer on the reinforcement surface or by retarding the cathodic or anodic processes of corrosion. The hazardous effects of synthetic inhibitors have led to the utilisation of alternative non-toxic, eco-friendly plant extracts, generally known as green corrosion inhibitors. The study aims to investigate the effect of Rice Husk Ash (RHA) as a green corrosion inhibitor on the durability of reinforced concrete. The compressive strength, carbonation depth and corrosion rate of RHA concrete has been studied. The results showed that the compressive strength increased with the increase in percentage of RHA upto 15% replacement of cement. However, a decrease in compressive strength was noticed from 15 to 20% replacement. It was also observed that the carbonation depth gets increased with the increase in percentage of RHA. From the corrosion tests, it was observed that the corrosion rate decreases with the increase in RHA percentage, hence increasing the inhibition efficiency of the concrete.

Rice Husk Ash as a Low Cost Soil Ameliorant for Abating Iron Toxicity in Lowland Rice

Background: The Fe toxicity is a perpetual problem of low lying poorly drained acid soils. It also affects the solubility and availability of most of the plant nutrients, by reducing toxic concentrations of iron, aluminum and manganese. To overcome these constraint, application of lime is inevitable but high cost of liming materials necessitate the use of low-cost, internally sourced, environmentally friendly and adoptable organic sources. In present study rice husk ash was used as a soil ameliorant in lieu of liming. Methods: A field experiment was conducted at Rice Research Station, Moncompu during 2017-2018 with nine treatments replicated thrice in RBD using rice variety Uma. A customized formulation with composition of K (8.9 %), Mg (3.2 %), Ca (3.7 %), Zn (2.1 %), Mn (0.23 %), B (3.5 %) and Cu (0.96 %) was developed based on the available nutrient status of the region and crop requirement and used for supplementary foliar nutrition. Result: It was found that treatment comprising of Soil test based RDF + Rice husk ash @ lime (based on pH) + foliar spray of 0.5 % solution of customized formulation @ 5 kg ha-1 as foliar application of 0.5 % solution in two splits at maximum tillering and panicle initiation stage was the best treatment in increasing yield by 23 % compared to recommended dose of lime and fertilizer application and B:C ratio increased from 1.53 to 1.91. Effect of rice husk ash in ameliorating soil acidity was found to be on par with application of lime based on pH in acid sulphate soils of Kuttanad zone.

Effect of Rice Husk Ash on the Hydraulic Conductivity and Unconfined Compressive Strength of Compacted Bentonite Enhanced Waste Foundry Sand

A laboratory study of the hydraulic conductivity, (HC), and unconfined compressive strength, (UCS), of compacted bentonite enhanced waste foundry sand (BEWFS) treated with rice husk ash, (RHA) for possible use as liner material is presented. The bentonite enhanced waste foundry sand, BEWFS, was obtained by blending waste foundry sand (WFS) with 12% bentonite by weight of the WFS and mixing the resulting blend thoroughly to obtain a homogenous mix. RHA was added to the BEWFS in increment of 2, 4, 6, 8 and 10% respectively of the dry weight of the BEWFS. The entire blended material was thoroughly mix together to obtain sample with different content of RHA. Index tests, compaction, UCS and HC tests were carried out on the blended materials to determine the effect of RHA on the behaviour of the BEWFS. HC as well as UCS of the materials were study using three compactive efforts of British standard light, (BSLC), West African standard, (WASC) and British standard heavy, (BSHC) compactive efforts respectively. The results obtained show that addition of RHA to BEWFS affected the index properties of the material marginally where the liquid limit increased to 35 from 32 %, plastic limit reduced from 12 to 11% and plasticity index increased from 20 to 25% respectively. The HC of the material was found to increase slightly from 6.28 x 10-08 to 3.90 x 10-08, 2.64 x 10-09 to 2.07 x 10-08 and 8.55 x 10-11 to 1.83 x 10-10 m/s with addition of up to 10 % RHA content and compacted at BSLC, WASC and BSHC respectively. Similarly, the UCS was found to increase to peak values of 177.22, 288.48 and 454.26 kN/m2 at same RHA content and compactive efforts. The implication of this result is that the addition of RHA up to 10% to BEWFS slightly increase the HC but does not compromise it while the strength gain in term of UCS can be said to compensate for the slight lost in HC. It is recommended that BEWFS treated with between 8 to 10% RHA content and compacted at BSHC compactive effort can be applied as liner in engineered waste containment system.

EFEITO DA APLICAÇÃO DA CINZA DA CASCA DE ARROZ SOBRE ATRIBUTOS DE SOLO SOB PASTAGEM

A aplicação de materiais carbonizados em solos pode resultar em melhoria de seus atributos químicos, físicos e físico-químicos. Entretanto, trabalhos que foquem sobre o efeito da aplicação da cinza da casca de arroz em solos ainda são escassos na literatura. Este estudo teve por objetivo avaliar os efeitos da aplicação da cinza de casca de arroz sobre os atributos químicos, físicos, e físico-químicos do solo. Foram coletadas amostras de solo (Luvissolo) sob pastagem em Dom Pedrito, RS. A amostragem foi feita em topossequência nas seguintes condições: i) pastagem com aplicação de cinza da casca de arroz (4,8 Mg ha-1) e; ii) pastagem sem aplicação de cinza. Posteriormente, foram determinados atributos químicos, físicos e físico-químicos de solo. Através dos resultados, averiguou-se que o uso da cinza no solo tem a capacidade de diminuir a acidez, aumentar a disponibilidade de nutrientes e melhora as condições estruturais dos perfis de solo analisados. PALAVRAS-CHAVE: Resíduos Industriais, Fertilidade do Solo, Matéria orgânica do solo, Acidez do solo.

PEMANFAATAN ABU SEKAM PADI DALAM INOVASI PEMUPUKAN KACANG HIJAU (Vigna radiate L) DI LAHAN GAMBUT

This study aimed to determine the effect of rice husk ash on yield and growth of peanut plants. This research has been carried out in the experimental garden of the Faculty of Agriculture of the Islamic University of Indragiri Tembilahan, Tembilahan Hulu District, Indragiri Hilir Regency. The time of the study began from April to July 2017. This research was a field trial using the Randomized Block Design (RBD) method which consisted of 6 levels of treatment, they are; without rice husk ash, 1 ton/ha of rice husk ash, 2 tons/ha of rice husk ash, 3 tons/ha of rice husk, 4 tons/ha ash rice husk ash, and 5 tons/ha of rice husk ash. Each treatment was repeated three times to obtain 18 trial plots in the field. Data of this study were analyzed using Analysis of Variance (ANOVA). The results showed that the administration of rice husk ash with various treatment doses, had a significant influence on the growth and yield of peanut plants. The treatment that has the best effect on the growth and yield of peanut plants has been found, which is an average of 3 tons/ha and 5 tons/ha.

Corrosion Effect of Rice Husk Ash in Concrete Pore Solution: Response Surface Analysis

Background: Corrosion of reinforcement impedes the structural integrity of concrete infrastructures by reducing the flexural, shear and axial strength of concrete, thereby making it structurally weak. Aim: This research assessed the corrosion effect of rice husk as a concrete constituent for the design of long-lasting concrete infrastructures. Materials and Methods: To achieve the aim of this research, rice husk was air-dried for two days and then burnt at a temperature of 600oC. It was used as a partial replacement for cement at 0%, 10%, 20% and 30% replacement of cement. The concrete pore solution was extracted by mechanical means. This was used as the medium to assess the weight loss and calculate the corrosion rate at seventy-two (72) hours interval with a focus on the temperature of the environment. The corrosion inhibition of the steel rebar was determined using the weight loss method. Results: The result was analysed and modelled using a response surface analysis. The optimisation of the corrosion effect was also assessed using the same method. The result of the study revealed that the inhibition efficiency based on the average corrosion rate was -69.54%, which indicates that 5% of rice husk ash does not inhibit corrosion, likewise the other replacements. The corrosion inhibition of 15% replacement with rice husk ash is slightly higher than the control sample. The research revealed that the most favourable replacement in terms of corrosion rate in comparison to the other percentages is 15%. Conclusion: The mathematical model showed that RHA has a positive effect on the corrosion rate of mild steel. This indicates that the higher the RHA, the lower the corrosion rate. The outcome of this research will serve as a guide for concrete users, engineers, corrosion experts and researchers on the use of rice husk ash in concrete production.

Effect of rice husk ash on early hydration behavior of magnesium phosphate cement

The application of rice husk ash (RHA) on magnesium phosphate cement (MPC) can increase the rational utilization of resources and improve the properties of MPC. RHA with the characteristics of porous and high activity as admixture has a certain influence on the hydration behavior of MPC. In this research, rice husk is calcined and ground reasonably to improve the activity of RHA. The particle size distribution, structure and micromorphology of RHA were characterized via laser particle size analyzer, X-ray diffractometer (XRD) and scanning electron microscope (SEM). The effects of RHA on hydration behavior, setting time and early compressive strength (3 h, 1 d, 7 d) of MPC were researched. Results indicated that the setting time was shortened about 2 min with the addition of 7% RHA. The compressive strength of RHA/MPC composites increased by 39.2%, 39.7% and 25.7% incorporating with 5% RHA at the age of 3 h, 1 d and 7 d. The hydration heat analysis (TAM Air) showed that RHA postpone the early hydration of MPC and cause a second exothermic peak. The XRD and thermal gravity analysis (TG/DTG) suggested the number of hydration products is increased with the introduction of RHA. The porosity level of RHA/MPC composites was dropped through the mercury intrusion porosimetry (MIP). RHA plays a positive role in providing the site of hydration reaction and an alkaline environment for the RHA/MPC composites. It can be known that the compactness of RHA/MPC composites was promoted through SEM observation.

Effect of rice husk ash on controlling insect pests on storage of black gram under Manipur condition

Effect of rice husk ash on controlling insect pests on storage of black gram under Manipur condition

Effect of Rice Husk Ash on the Performance of Hot Asphalt Mixes

In this paper, using rice husk ash (RHA) in hot mix asphalt (HMA) as filler was evaluated. The main aim of replacing mineral filler is enhancing the performance of asphalt mixes and producing an economical asphalt mix. For this purpose, five different mixes were prepared; the first was a control mix (traditional mix) containing 100% Lime Stone Dust (LSD) as filler and 0% RHA. While, the other mixes contain 25%, 50%, 75% and 100% of RHA as a percentage of the filler weight. Optimum bitumen content (OBC) was determined using Marshall test, also all Marshall parameters (Stability, Air Voids, Voids in Mineral Aggregate, Unit Weight and Flow) were examined. Indirect Tensile Strength Test (ITST) and Wheel Tracking Test (WTT) were conducted and their results were analyzed. Dynamic modulus (│E*│) is considered an important parameter used in mechanistic-empirical pavement design. The │E*|is measured at different temperature/frequency combinations. Dynamic modulus (│E*│) and phase angle (δ) are used for the visco- elastic characterization of HMA. Thus, these properties were measured for mixes with and without RHA. The results indicate that RHA has the potential to be used as partial substitution of mineral filler LSD in pavement construction. Adding RHA enhances Marshall stiffness, reduces rut depth and increases indirect tensile strength values. Further, a significant change has been occurred in OBC for all mixes and the optimum replacement ratio is recorded as 50% RHA: 50% LSD. Finally, mixes containing RHA show higher dynamic modulus values and flow number.

Microstructural and shear strength properties of RHA-reinforced Sn–0.7Cu composite solder joints on bare Cu and ENIAg surface finish

In this study, the joint effect of rice husk ash (RHA) reinforcement as an alternative silica source and electroless nickel immersion silver (ENIAg) surface finish on the intermetallic compound (IMC) formation and shear strength of the Sn–0.7Cu solder system was investigated. A series of plain and composite lead-free solder systems (Sn–0.7Cu−xRHA; x = 0, 0.01, 0.05 and 0.1 wt%) was successfully developed and subjected to reflow soldering on bare Cu and ENIAg surface finish. After conducting a comprehensive microstructural study using the scanning electron microscopy and energy dispersive spectroscopy techniques, the Cu6Sn5 and Cu3Sn intermetallic compound (IMC) phases were observed at the interface of the Sn–0.7Cu−xRHA/Cu composite solder joints. On the other hand, the (Cu,Ni)6Sn5 and Ni3Sn4 IMC phases dominated the interface of the Sn–0.7Cu−xRHA/ENIAg counterparts. Given the promising potential of the ENIAg surface finish, the Sn–0.7Cu−xRHA/ENIAg exhibited IMC thickness values within a range of 3.81–4.74 µm as compared to the 6.13–9.3 µm range exhibited by the Sn–0.7Cu−xRHA/Cu counterpart. More so, the ENIAg surface finish was effective in improving the shear strength of the plain solder joint, with the Sn–0.7Cu/ENIAg exhibiting 13.44 MPa relative to the 11.5 MPa exhibited by the Sn–0.7Cu/Cu counterpart. Overall, the strengthening effect of the RHA reinforcement was well marked in the Sn–0.7Cu−xRHA/Cu composite solder joints with the composite having 0.1 wt% RHA exhibiting the highest shear strength (14.6 MPa) across the board.

Effects of Rice Husk Ash and Silicon Carbide addition on AA6351 Hybrid Green Composites

This paper is aimed at studying the feasibility of the development of high-performance low-cost aluminium hybrid composites using silicon carbide (synthetic) and rice husk ash (agro waste) as reinf...

Combined effects of rice husk ash and nylon fiber on engineering properties of cement mortar

Utilization of waste materials is of utmost importance in creating a sustainable future. Industrial waste as well as recycled materials are used as supplementary cementitious materials in order to preserve the environment as well as to enhance the properties of the construction material. In the reporting work, rice husk ash (RHA) and nylon fibers were added to cement mortar (a mixture of cement, sand and water) to investigate their individual, as well as combined effect on flexural and compressive strengths, sorptivity, and abrasion resistance of cement mortar. Test results obtained in this study indicate that RHA can be blended up to 10% by weight of cement to obtain higher flexural and compressive strengths as the addition of RHA improves the strength of the cement paste by enhancing the production of calcium-silicate-hydrate. Nylon fiber reinforcement with 0.5 vol% showed efficient increment in flexural and compressive strengths of the mortar as a result of fibers holding the elements of the composite together. Replacement of cement with 10 wt% RHA effectively reduced the sorptivity of mortar as the addition of RHA results in the formation of a dense calcium-silicate-hydrate structure reducing the porosity and blocking the capillaries inside the paste. Addition of 0.5 vol% nylon fiber to the cement replaced with 10 wt% RHA showed an increase in abrasion resistance of the mortar as nylon fibers can retain during longer time period of stress due to their high elasticity. Overall results indicated that the combined addition of rice husk ash and nylon fibers can increase the performance of cement mortar effectively by increasing its mechanical as well as durability properties.

Durability and strength improvement of clayshale using various stabilized materials

In Indonesia, the study of clayshale has begun to be widely discussed. Clayshale is well known as a degradable material. The process of degradability in clayshale shows the weakening of the shear strength. This clayshale characteristic leads to several failures in the geotechnical design. To avoid degradability, soil stabilization testing was carried out by using cement, lime and rice husk ash. In the soil stabilization study, the use of cement and lime is already common and effective for some type of problematic soil, but the cost of material production is expensive and not environmentally friendly. Rice husk ash as agricultural waste material has the potential as a stabilizing material because it is availability and reaction ability with lime as known pozzolanic reaction. From the test results, each mixture has different response and potency. Cement has better resistance to wetting and drying with a significant increase in unconfined compressive strength. Whereas the lime itself did not significantly increase durability and unconfined compressive strength, but the effect of rice husk ash to the soil-lime mixture increasing durability despite the reduction in unconfined compressive strength.

Experimental Works on Self-Compacting Concrete By Partial Replacement of Rice Husk Ash with Subjected To Acid Attack

The objectives of this work is effect of Rice husk ash (AWM) in self-compaction concrete (SCR) in order to increase in strength and a better bonding between aggregate and cement paste. SCR had an improvement over conventional concrete so that it can be placed easily without vibration or mechanical consolidation. The properties of SCR have been studied in several researches due to its importance and ability to solve the problems of concrete mix. AWM was used to substitute cement in stepped concentration of 0 %, 5%, 10%, 15%, 20% and used to gain characteristic CS of M40 grade concrete mix. It is cured normal water and sulphuric acid solution (H2SO4) in for different ages (7days, 28days and 60days) and the strengths were determined. Sulphuric acid used in the percentages of 0%, 1%, 3%, 5%.

Effect of rice husk ash on controlling insects pests on storage of soybean seeds under Manipur condition

An experiment was conducted in the experimental laboratory of Agronomy Department, College of Agriculture, Central Agricultural University, Imphal, in 2013 to 2016, to study the “Effect of rice husk ash on controlling insects pests on storage of soybean seeds” (Glycine max L. Merril) in Manipur condition. It was found that when we mixed the rice husk ash with soybean seeds and stored in the ratio soybean: rice husk 1: 0.25 and above and there was no loss from the insect pests. In control i.e. T1(grains without rice husk ash) was found 100% damage in one year.

Effects of rice husk ash and wollastonite incorporation on the physical and thermal properties of refractory ceramic composites

ABSTRACT The main objective of this work was to evaluate the effects of rice husk ash and wollastonite microfibers incorporation, added per clay partial substituition, on physical and thermal properties of refractory ceramic composites. The raw materials characterization occurred with respect to their chemical composition (XRF), phase composition (XRD) and granulometry by laser. The composites were avaluated by physical properties - apparent porosity, bulk density, water absorption, linear retraction after sinterization and mass variation - and thermal properties - thermal conductivity and thermal shock. The rice husk ash used in the present work proved to have potential as a ceramic precursor in the development of refractories. The clay substitution per ash and the microfiber different percentages resulted in an increase in water absorption and apparent porosity and a reduction in the linear retraction. The increase in porosity suggests that the mullitization was insufficient. Regarding the thermal performance, the thermal conductivity was inversely proportional to the porosity and the microfiber percentage. In addition, the higher the thermal-shock temperature gradient the lower was the number of cycles resisted by the composites.

Effect of rice husk ash on mechanical properties of concrete containing crushed seashell as fine aggregate

This study reveals how mechanical properties of concrete containing crushed seashell is influenced by use of rice husk ash (RHA). This experimental program comprises of twelve concrete mixes. All the concrete mixes were created by substituting 0, 10%, 20%, and 30% of fine aggregate with crushed seashells and by substituting 0, 10%, and 20% of cement with RHA. The M30 grade mix design was chosen for the study. Tests were carried out on fresh samples of different concrete mixes to find out slump and other properties. Tests also were conducted on hardened samples to ascertain their split tensile, compressive and flexural strength after 7 days, 28 days and 90 days of curing under water. The experimental observations indicate that use of RHA based concrete mixes improves the strength in comparison with that of crushed seashell based concrete mixes. In seashell based concrete, the strength gradually decreases at all percentage of replacement of crushed seashells with fine aggregate. Further, it is observed that, partial substitution of cement with RHA increases strength in all the concrete mixes. The result indicates higher compressive, split-tensile and flexural strength at 10% partial replacement of fine aggregate with crushed seashells and 20% partial substitution of cement with RHA.

The Effects of Rice Husk Ash and Paper Waste Ash as Admixture to Self Compacting Concrete

The Effects of Rice Husk Ash and Paper Waste Ash as Admixture to Self Compacting Concrete

The Added Effects of Rice Husk Ash Against to Growth and Yield on Basil (Ocimum basilicum)

Basil is a spice plant that is widely used as a culinary additive, fragrance, atractan, and anti-bacterial because it produces essential oils, basil oil. This research aimed to identifying the affect of adding rice husk ash on different basil’s cultivars on growth and yield of basil (Ocimum basilicum). This research use 4 x 2 factorial experiment pattern with Completely Randomized Design consisting of 5 replication. The first treatment was various type of basil’s cultivars such as Genovese cultivars (K1) and Dark Opal cultivars (K2). The second treatment was doses of rice husk ash such as control or without giving rice husk ash (M0), 30 g/pot (M1), 35 g/pot (M2), dan 40 g/pot (M3). The observed parameters were soil bulk density and porosity, plant height, leaves total, roots length, and leaves simplisia. The results showed that the application of husk ash can affect the increase in physical properties of the soil, but has not directly affected the growth parameters and yield of leaf simplisia. Dark Opal cultivars on all growth parameters showed higher yields, but Genovese cultivars showed higher yields or simplisia.

Experimental Research on Rice Husk Ash as Replacement to Cement in Construction Industry

For the past few years, various materials were used to supplement cement as an essential component for high performance concrete mix design in the construction industry. Those materials can be natural, industrial wastes, or by- products etc. Most common substitute materials are fly ash, Silica Fume and Rice Husk Ash. The aim of the study is to find the suitability of the rice husk ash as a pozzolanic material for cement replacement in mortar and concrete and to assess the effect of Rice Husk Ash (RHA) on concrete. An attempt has been carried out to establish the strength factor of concrete using RHA as a base material to replace cement and satisfies the structural properties of concrete such as Consistency, compressive strength, flexural strength etc. The replacement levels of the cement by mass: 0, 5, 10, 15, 20 and 25% for rice husk ash were chosen for a curing periods of 3 days, 7 days, 28days and 56days