Study on properties of rice husk ash and its use as cement replacement material

Habeeb, G. A.; Mahmud, Hilmi Bin

doi:10.1590/s1516-14392010000200011

Cited by 310 publications

(155 citation statements)

References 7 publications

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“…Cement is the most expensive component among the raw materials of concrete bricks. Alternative materials have been considered in order to reduce the manufacturing cost [1][2][3]. Every year million tons of paddies are produced in Vietnam.…”

Section: Introductionmentioning

confidence: 99%

Utilization of Rice Husk Ash as partial replacement with Cement for production of Concrete Brick

Minh

Tram

2017

MATEC Web Conf.

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Abstract. Rice husk ash (RHA) obtained from agricultural by-product could be a potential source for partial cement replacement to produce concrete brick. In this study, primary RHA and RHA heat-treated at 500 o C were used to substitute cement in raw material mixtures. Preliminary analyses were conducted to evaluate some properties of RHA such as loss of ignition (LOI), morphology, chemical and phase compositions. X-ray Powder Diffraction (XRD) and X-Ray flourescence (XRF) results indicated that silica (SiO2) is the major component of RHA. Transmission Electron Microscopy (TEM) images showed that RHA particles were in polygonal shapes with diameter approximately from 300 nm -1 μm. Cement was replaced with RHA by weight at 10 %wt. The effects of RHA on the physical and mechanical properties of the aggregate cement bricks were investigated. Results demonstrated that the compressive strength of concrete bricks increased with age at curing and decreased as the percentage of RHA content increased. It is recommended that further studies should be carried out to achive optimum parameters for production of concrete brick in economic aspects.

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Section: Introductionmentioning

confidence: 99%

Utilization of Rice Husk Ash as partial replacement with Cement for production of Concrete Brick

Minh

Tram

2017

MATEC Web Conf.

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“…Marthong (2012) reported that the optimal limit of partially replacement of cement by RHA it is 10%. Habeeb and Mahmud (2010) concluded that the compressive strength of blended mortar with 10% RHA is increased because of the pozzolanic activity and the micro filler effect of RHA. Based on the obtained results it can be said that the particle size (specific surface area) and silica structure (amorphous) have a larger influence on the mortar strength than overall silica content and loss on ignition (as in RHA-C).…”

Section: Workabilitymentioning

confidence: 99%

Effect of Rice Husk Ash Properties on the Early Age and Long Term Strength of Mortar

Rasoul

Günzel

Rafiq

2017

High Tech Concrete: Where Technology and Engineering Meet

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This paper presents an experimental study on the effect of chemical composition and physical properties of rice husk ash (RHA) on the strength of mortar. The aim of this investigation was to establish the optimal RHA replacement levels as blending component in cement. Four different types of RHA (A, B, C and D) were used of which RHA-C and D had the highest content of amorphous silica. Compressive and tensile strength and workability of the mixes were compared with control OPC samples. Results show that the early age (7days) strength of RHA blended mortar samples was lower than the compressive and tensile strength of the OPC control samples. However, the 28 day strength of samples with up to 20% RHA-C and RHA-D was higher than that of the control samples. The 90 day strength of all blended samples with up to 40% RHA was higher than that of the control samples. RHA-D performed best in the experiments with a compressive strength increase of 16% at 20% RHA replacement and an increase of compressive strength of 8.6% at 40% RHA replacement. The results at 90 days show that cement could be replaced with up to 50% RHA with only a small reduction in strength compared to OPC mortar. From the results it was found that the content of amorphous silica has the biggest influence on the strength of the mortar samples while the workability was higher for samples with finer grained RHA.

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“…(19) reduces to: The long-term strength activity index can be extended for predicting strength Activity index for different ages and different surface areas. The coefficients could be obtained by curve fitting of data from tests carried out by many investigators such as [3,[9][10][11][12]. Details will be out of the scope of this technical paper and will be discussed in the authors' complete research project [13].…”

Section: Optimum Replacement Of Cement By Fly Ashmentioning

confidence: 99%

“…Results showed that the values of compressive strength of concrete mixed with RHA of the age less than 28 days tend to be lower than those of concrete mixed with Ordinary Portland Cement (OPC). However with suitable replacements of cement by RHA the values of compressive strength of concrete can be higher than those of ordinary concrete even at the early age [3]. The major reason might be the heat of hydration of cement mixed with pozzolan could surpass that of OPC [4].…”

Section: Introductionmentioning

confidence: 99%

Statistical Analyses of Optimum Partial Replacement of Cement by Fly Ash Based on Complete Consumption of Calcium Hydroxide

Ouypornprasert

Traitruengtatsana²,

Kamollertvara³

2016

MATEC Web of Conferences

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Abstract. The objectives of this technical paper were to propose the optimum partial replacement of cement by fly ash based on the complete consumption of calcium hydroxide from hydration reactions of cement and the long-term strength activity index based on equivalent calcium silicate hydrate as well as the propagation of uncertainty due to randomness inherent in main chemical compositions in cement and fly ash. Firstly the hydration-and pozzolanic reactions as well as stoichiometry were reviewed. Then the optimum partial replacement of cement by fly ash was formulated. After that the propagation of uncertainty due to main chemical compositions in cement and fly ash was discussed and the reliability analyses for applying the suitable replacement were reviewed. Finally an applicability of the concepts mentioned above based on statistical data of materials available was demonstrated. The results from analyses were consistent with the testing results by other researchers. The results of this study provided guidelines of suitable utilization of fly ash for partial replacement of cement. It was interesting to note that these concepts could be extended to optimize partial replacement of cement by other types of pozzolan which were described in the other papers of the authors.

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Study on properties of rice husk ash and its use as cement replacement material

Cited by 310 publications

References 7 publications

Utilization of Rice Husk Ash as partial replacement with Cement for production of Concrete Brick

Utilization of Rice Husk Ash as partial replacement with Cement for production of Concrete Brick

Effect of Rice Husk Ash Properties on the Early Age and Long Term Strength of Mortar

Statistical Analyses of Optimum Partial Replacement of Cement by Fly Ash Based on Complete Consumption of Calcium Hydroxide

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