Effect Of Rice Husk Ash Research Articles

Effectiveness of Rice Husk Ash and Glass Powder Waste as Partial Replacements of Cement in Concrete Construction

The environmental impact of cement production has drawn attention to the use of glass waste and rice husk as a partial replacement for cement in concrete. According to research, the compressive strength of concrete containing GPW and RHA can increase up to 15-20%, after which it begins to decline. The objective of this study was to analyze the effectiveness of partial replacement of cement with GPW and RHA. Some of the factors considered in this study were compressive strength and specific gravity. The proportions of GPW and RHA used were 0%, 3%, 5%, 10%, 15%. Then concrete testing was done after 7 and 28 day. The maximum 28-day concrete compressive strength result for the addition of GPW and RHA at 5% mix proportion was 33.1 Mpa. The more the proportion of GPW and RHA mixture, the more the relative specific gravity of concrete decreases. Overall, this study found that the use of GPW and RHA in concrete had a significant effect on compressive strength and specific gravity. But do not forget to pay attention to how much GPW and RHA mix needs and the quality of concrete to be achieved.

The Effects of Rice Husk Ash as Bio-Cementitious Material in Concrete

The Effects of Rice Husk Ash as Bio-Cementitious Material in Concrete

RICE HUSK ASH (RHA) - A POTENTIAL SOURCE FOR IMPROVING PHOSPHORUS NUTRITION IN POTATO (S. tuberosum L.)

Use of alternative sources of nutrients such organic manures, residues and by-products to chemical fertilizers may enhance not only the yield but cut down the fertilizers use. Therefore, present investigation was carried out to explore the possibility of using rice husk ash (RHA) as a source of phosphorus in potato crop. Two pot experiments were conducted on Kufri Jyoti and Kufri Girdhari to determine the effect of rice husk ash on phosphorus nutrition of the crop during 2020-21. Application of rice husk ash (RHA) significantly increased the plant height, haulms (leaf plus stem) biomass, root weight, chlorophyll content (SPAD value) and P content. In Kufri Jyoti, application of 20g RHA per pot significantly increased haulms biomass, tuber yield, relative leaf chlorophyll content and P content in haulms by 17.8 per cent over control. In Kufri Girdhari, application of 40g RHA/ pot also increased the P content by (14.6 %) in haulms over control besides significant increase in haulm yield, root mass and relative leaf chlorophyll content. It was observed that subjecting the crop to moisture stress by withholding the irrigation towards harvest, senescence was delayed in plants fertilized with rice husk ash. RHA application showed a significant and positive correlation with root length and tuber yield (r=0.70). The results of the present study revealed that RHA can be used as a source of phosphorus for potato crop and has potential to improve water relations and nitrogen nutrition as indicated by improved relative leaf chlorophyll content in plants fertilized with RHA.

Effects of rice husk ash and fly ash on low-temperature PCM aggregate concrete: Relieving frost heave through sensible and latent heat

Temperature is one of the primary factors influencing frost heave. It is feasible to reduce and compensate for heat loss through the sensible and latent heat of concrete, thereby mitigating frost heave deformation. This paper investigated the effect of incorporating rice husk ash (RHA) and c ash (FA) into phase change material (PCM) aggregate concrete on concrete properties, especially temperature response. Specifically, the study focused on incorporating 10–20 % RHA and 5–15 % FA to reduce the temperature drop by utilizing sensible heat. The study also considered their effects on density, workability, thermal constants, and crystal compounds. The results showed that the incorporation of RHA reduced the density and workability of concrete, making it more viscous. However, the addition of FA improved the negative impact of RHA on the workability. The pozzolanic and filling effect of them increased the strength of concrete. The addition of 20 % RHA decreased the thermal conductivity and thermal diffusivity of concrete by 33.83 % and 43.49 %, respectively. The thermal impact of FA on concrete was not as pronounced as that of RHA. The time-temperature curve indicated that the temperature difference between the concrete containing 20 % RHA-15 % FA and the control concrete can reach up to 4.3 °C. The time taken for the concrete containing 20 % RHA-15 % FA to reach the minimum temperature was delayed by 25 min compared to that of the control concrete. The XRD results revealed that the addition of RHA and FA led to the consumption of portlandite, indicating a pozzolanic reaction in RHA and FA.

Characterization of historic mortars and the effect of rice husk ash (RHA) on quicklime

Historic mortars are minerologically characterized for many reasons pertaining to traditional building conservation. In order to determine the binding material of the historic masonary building, this material must be sufficiently separated from the aggregate. In this study, the Cas mortar (Traditional gypsum-based construction mortar in Siirt, Türkiye) used in traditional Cas houses was characterised and compared with composite lime mortars prepared by substituting quicklime with 10 %, 15 % and 20 % rice husk ash (RHA). The mechanical properties of Cas mortar are much higher than those of lime mortars. However, when 20 % RHA was substituted for lime, it was found to significantly change the properties of the mortars, increasing the compressive and flexural strength by 68 % and 58 % respectively and improving the specific heat and many other properties. X-ray diffraction (XRD), thermogravimetric analysis (TGA) and differential thermal analysis (DTA) and Fourier transform infrared spectroscopy (FT-IR) analyses showed that the 63 μm sieved powder analysis was more accurate in determining the chemical characterisation of the historic mortars.

Effect of Rice Husk Ash (RHA) and slake-lime as partial replacement of cement in the production of concrete

This study examines the utilization of rice husk ash (RHA) and slaked lime as substitutes for a portion of the cement in manufacturing concrete. The RHA was acquired from a nearby source, subjected to calcination at temperatures ranging from 500 to 700 °C, and then passed through a sieve to obtain particles with a size of 150 microns. Concrete mixes were made using Ordinary Portland cement (OPC), fine and coarse aggregates, and water, with different amounts of RHA and slaked lime. The concrete mix design adhered to established standards, with a mix ratio of 1:1.5:3 (cement: fine aggregate: coarse aggregate). The experiment was designed using response surface methods, with RHA, slaked lime, and cement as factors, each having five levels. Concrete cubes were formed using 100 mm steel moulds and then submerged in water to assess their workability. The compressive strength was measured using universal testing equipment after 7, 28, and 90 days of cure. The flexural strength of concrete beams was assessed after 7 and 28 days. Samples were subjected to scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) examination after 28 days. The compressive and flexural strengths increased as the curing period progressed, with the 10% RHA substitution showing the maximum strength. The SEM analysis showed that RHA10 exhibited the maximum concentration of silicon, which corresponds to the recommended 10% replacement level of OPC and meets the concrete specifications specified by ASTM M20 grade. Utilising RHA decreases expenses and minimises the amount of concrete that is discarded. The most effective replacement for OPC was 10% RHA, which produced long-lasting and strong concrete.

Effect of rice husk ash and coconut coir fiber on cement mortar: Enhancing sustainability and efficiency in buildings

This research investigated energy efficiency, insulation properties together with strength properties and cost-effectiveness, focusing on developing a sustainable mortar. Cement: sand of 1: 2.25 (by weight) mortar with varying rice husk ash (RHA) and coconut coir (CC) fiber contents were prepared. Physical, microstructure, strength, durability, and thermal performances were experimentally examined. Life cycle assessment and cost analysis were numerically examined. Adding CC fiber reduced the longer final setting time found with the RHA-based mortar. With 20 % RHA and 0.5 % CC fiber, weight was reduced by 9.2 % (compared to the conventional mortar), promising a lightweight mortar. Flexural strength was increased by 8.6 % with 0.5 % CC fiber addition, this was further increased to 13.6 % with 10 % RHA in the mixture. 20 % RHA and 0.5 % CC fiber mortar exhibits a temperature difference of 8.7°C, whereas the conventional mortar exhibits a temperature difference of 2.5°C, indicating a reduced thermal conductivity of the RHA-CC fiber mortar. This mortar reduced the CO2 emission, energy consumption, and manufacturing cost by 17.7 %, 13.6 % and 7.0 %, respectively, indicating the sustainability. A cost-effective and energy-efficient lightweight mortar with enhanced thermal insulation and flexural strength was achieved by reinforcing the conventional mortar with 20 % RHA and 0.5 % CC fiber for the applications of dwellings.

Effect of Rice Husk Ash on the Tensile Strength of Epoxy Based Bio-composite

Rice husk is a major agricultural waste which has very little practical application for the farmers. It has been used as a fibre with various resins to produce composites. If burnt it produces ashwhich contains 90% Silica which has high abrasive strength and can contribute to mechanical strength of composites. In the present work RHA was obtained by incinerating RH at about 6000C for 6 hours. The ash obtained with this procedure is shiny white in colour and rich in silica. The ash obtained by this process was mixed in various weight proportions with epoxy and powdered rice husk to obtain bio composites. Mechanical tests were conducted to assess the strength of the composite. It was observed that incorporation of RHA as a fibre improved various mechanical properties upto a certain weight proportion where after it started decreasing. SEM tests were conducted to understand the failure mechanism. It can be concluded that RHA can be a suitable fibre for bio composites up to a limited range. In future however better casting techniques can be developed to utilize the abrasive strength of this abundant resource.

The Effect of Rice Husk Ash as Cement Substitution on the Compressive Strength of Self-Compacting Concrete

Self-Compacting Concrete (SCC) is an innovative solution in today's world of concrete technology. Unlike traditional concrete, it does not require a vibrator for compaction, which makes concrete work easier. One of the key features of SCC is its high workability, which is achieved through the use of chemical admixtures and mineral additives. Rice husk ash is one such additive that can be used as a pozzolanic material for concrete mixtures, which is important as rice husk waste can cause environmental problems. The objective of this study was to investigate the effect of rice husk ash on SCC concrete. The study involved using Rice Husk Ash (RHA) as a partial replacement for cement in SCC concrete at varying percentages (0%, 5%, 10%, and 15% of cement weight). The results of the slump flow test showed that the highest value of 775 mm was achieved at 15% RHA, meeting the specifications of SCC concrete. In terms of compressive strength, the results showed that the SCC mixture without rice husk ash (0% RHA) had the highest average compressive strength, which was 30.56 MPa at 14 days and 31.66 MPa at 28 days of concrete. On the other hand, the average compressive strength of SCC concrete with rice husk ash mixture was highest at 5% RHA, with 25.04 MPa at 14 days and 28.81 MPa at 28 days. Overall, the study found that the use of rice husk ash in SCC concrete had a significant effect on its compressive strength, with the highest compressive strength being achieved at 5% RHA.

Preparation and properties of porous rice husk ash for internal curing of high performance cement pastes

To address the challenges posed by significant autogenous shrinkage in high-performance concrete and mitigate the adverse effects of conventional internal curing materials on its mechanical properties, this study explored the potential use of rice husk ash (RHA) as internal curing materials. The research investigated the impact of combustion regime (combustion temperature and dwelling time) and the milling process on the microstructure and physical-chemical properties of RHA. Moreover, the effect of RHA on autogenous shrinkage, compressive strength, and microstructure in cement pastes were also reported. Experimental results demonstrated that the combustion regime and milling time could significantly affect the pore structure, particle size and pozzolanic activity of RHA. RHA had good potential for internal curing when it was burned at 600°C for 1 h and milled for 15–30 min. RHA released the entrained water after 12 h to slow down the depletion of free water, and thus inhibited the development of self-drying and autogenous shrinkage. The 168 h shrinkage was reduced by 56.8 %, 62 %, and 51.8 %, respectively when the milling time increased to 30 min. Moreover, the addition of RHA with a smaller particle size could refine the microstructure of matrix and enhance the compressive strength due to its higher pozzolanic activity. These findings suggest promising applications for RHA as an effective internal curing material in high-performance cementitious materials.

Effect of Rice Husk Ash and Neem Extracts on Callosobruchus maculatus in Stored Cowpea in Northern Ghana

Effect of Rice Husk Ash and Neem Extracts on Callosobruchus maculatus in Stored Cowpea in Northern Ghana

Exploring the Impact of Rice Husk Ash Masonry Blocks on Building Energy Performance

Operational building energy consumption accounts for 55% of global energy consumption. Most of this is attributed to residential buildings, as they make up the largest building type when compared to the total building stock worldwide. As the building envelope is a major contributor to building energy performance, especially the external walls, its optimisation is therefore imperative to reduce energy consumption and carbon emissions. This study set out to assess the effects of waste material additions to external walls and their effect on building energy performance. This research aimed to critically investigate the effect of rice husk ash (RHA) masonry blocks on building energy performance when compared to conventional masonry blocks in tropical climates. A mix of methods, including experimental investigation and simulation studies, were employed for this study. Three variations of RHA block samples were created for this investigation: RHA 5%, RHA 10%, and RHA 15%. Using prototype buildings from the study context, the building simulation results helped quantify the impact on building energy performance from the reuse of rice waste. The largest improvement to the building fabric was recorded with the RHA15% blocks, which resulted in a 9.9% and 11.3% reduction in solar heat gains through the external walls for the selected bungalow and duplex/storey building, respectively. This resulted in a 6.55% and 4.2% reduction in cooling loads and a 4.1% and 2.8% reduction in carbon emissions, respectively, for the bungalow and duplex/storey building. The findings of this research will prove valuable to householders, researchers, architects, and policymakers in their decision-making processes. The findings will also be useful in introducing new methods that can be adopted for similar studies, bridging the knowledge gap while promoting a circular economy through the reuse of landfilled waste.

Effect of Rice Husk Ash on Dispersion of Graphene Oxide in Alkaline Cementitious Environment

Effect of Rice Husk Ash on Dispersion of Graphene Oxide in Alkaline Cementitious Environment

Laboratory Assessment of the Effectiveness of Rice Husk Ash, Rice Husk, and Groundnut Shells in Soil Improvement

Laboratory Assessment of the Effectiveness of Rice Husk Ash, Rice Husk, and Groundnut Shells in Soil Improvement

Combined effect of rice husk ash and cementitious capillary crystalline waterproofing materials on the performance of mortar

The cement industry is known to leave an enormous environmental footprint. Rice husk ash (RHA), due to its high silicon content, is commonly used as a supplementary cementitious material. However, excessive use of RHA may adversely affect the performance of mortar. Cementitious capillary crystalline waterproofing (CCCW) materials can produce crystals to fill cracks and pores in mortar through the permeation and crystallization of its internal active chemical substances. Therefore, the potential for the combined use of RHA and CCCW is investigated. The results of experiments demonstrate that the mechanical properties and impermeability of the specimens are further improved by the synergistic effect of the two materials. Compared to the control group, the compressive strength and flexural strength peak values of the specimens increased by 22.83 % and 25 %, respectively. The addition of CCCW mitigated the detrimental impact of RHA on the impermeability of the specimens. The microscopic tests indicated that the pozzolanic reaction and filling effect of RHA reduced the porosity of the specimens, enhancing their compactness. Additionally, the permeation and crystallization action of CCCW further contributed to this densification. In the joint utilization of both materials, the incorporation of CCCW serves to counteract the adverse effects of excessive RHA on the self-healing capacity of cracks within the specimens. Concurrently, the high specific surface area properties of RHA facilitate the permeation and crystallization processes of CCCW.

Effect of rice husk ash on soil stabilization at Dinajpur City

Understanding local conditions is crucial for applying soil stabilization principles from other regions to a specific country for effective and sustainable stabilization methods. This investigative study delves into the suitability of locally available Rice Husk Ash (RHA) for incorporation into local building construction practices at Dinajpur, Bangladesh, aiming to minimize the volume of waste disposed of in the environment, thereby mitigating environmental pollution. Conventional soil stabilization techniques are becoming increasingly expensive due to the rising costs of stabilizing agents such as cement. Replacing a portion of the stabilizing agent with RHA could potentially reduce the cost of stabilization while also minimizing environmental harm. RHA comprises 85-90% silica, making it an excellent substitute for silica in soil stabilization. Silica is recognized as an effective binding agent alongside cement. The soil sample selected for this research is a highly plastic clay (CH), which necessitates significant strength enhancement. Three soil samples were stabilized with varying percentages of RHA and a minimal amount of cement. Observations were made to assess the changes in soil properties, including Maximum Dry Density (MDD), Optimum Moisture Content (OMC), and Unconfined Compressive Strength (UCS). The results obtained indicate that increasing RHA content leads to an increase in MDD but a decrease in OMC. Additionally, the UCS of the soil exhibits substantial improvement to up to 88% with increasing RHA content up to 10%. Based on the observed maximum strength enhancement, a 10% RHA content combined with 6% cement is recommended as the optimal combination for practical applications.

The Effects of Rice Husk Ash and Goat Manure Application on the Growth of Mustard Plants (Brassica juncea L.) Varieties Tosakan

The Effects of Rice Husk Ash and Goat Manure Application on the Growth of Mustard Plants (Brassica juncea L.) Varieties Tosakan

Development of ultra-light foamed insulation materials and interfacial bond behavior with fiber-reinforced alkali-activated composites

Due to the complex construction process, short service life and serious environmental pollution, the traditional insulation engineering and formwork engineering have caused great challenges and obstacles to the realization of the " dual carbon " goal. This study developed a new green external insulation system that integrates insulation and formwork based on alkali activation technology. The preparation technology of ultra-light foam insulation material (ULFIM) and the interface design method between ULFIM and fiber reinforced alkali-activated composite material (FRAC) were proposed. The effects of rice husk ash (RHA) and polyethylene (PE) fiber content on the dry density, thermal conductivity, compressive strength, volumetric water absorption, and pore structure parameters of ULFIM were studied. The effects of groove width, groove depth, groove spacing, and groove density on the interfacial bond behavior of FRAC-ULFIM were discussed. The microstructure of ULFIM and the interface transition zone morphology of FRAC-ULFIM and FRAC-extruded polystyrene (XPS) were observed using scanning electron microscopy (SEM), and the mechanism of influencing factors on the corresponding indicators were revealed. The results showed that adding an appropriate amount of RHA and PE fiber had a significant positive effect on improving the performance of ULFIM. In the past, the optimal dry density and thermal conductivity of ULFIM were only 191.5 kg/m3 and 0.0494 W/(m·K), respectively, and the compressive strength at 7 d could be as high as 0.49 MPa. In addition, interface shear performance test results have shown that the "bridging effect" of PE fiber can effectively improve the shear strength and ductility of FRAC-ULFIM, which was 23.7% higher than the interface shear strength of FRAC-XPS under the same conditions. The groove treatment increased the interfacial shear strength of FRAC-ULFIM from 74.59 kPa to 266.37 kPa, with a maximum increase rate of 257.11%. The proposed new green external insulation system has significant potential application value.

Effect of Rice Husk Ash on the Properties of Concrete

Abstract: As a binder for infrastructure development, conventional Portland cement is currently the primary material that is used. However, cement production has a substantial impact on the environment, and many pozzolanic materials can reduce their carbon footprint with conventional Portland cement. In this experimental study, replacement of OPC (ordinary portland cement) is replaced with the ash produced from rice husk (An agricultural waste) and analyzed for durability and strength performance in concrete samples and mortar as well as chemical composition analysis and microstructure observation of rice hull ash according to X-ray differential test data were also conducted in the research analysis. it is produced by burning of husk (produced by rice barley waste) of oxygen for the production of rice husk ash. Its chemical composition is rich in silicates and aluminates which promotes the binding property of ordinary Portland cement and does not affect the IST(Initial setting time), FST(Final setting time) and does not increase the fineness of the cement particles hence it gives significant results with cement replacement. It was determined that 10% rice husk ash replacement was the optimum value for rice husk ash replacement based on the strength and workability criteria of the concrete quality assurance system.

Effect of Rice Husk Ash and Ground Granulated Blast-Furnace Slag on Mechanical Properties and Resistance to Chloride Penetration of High Strength Concrete

Effect of Rice Husk Ash and Ground Granulated Blast-Furnace Slag on Mechanical Properties and Resistance to Chloride Penetration of High Strength Concrete