A Review Study of Compressive Strength of Concrete by Use of Fly Ash, Rice Husk Ash and Egg Shell Powder as Partial Replacement of Cement

Aug 25, 2026

Uploaded by Asher

Fly ash and rice husk ash serve as common pozzolans and are widely used to enhance the properties of mortar and concrete. While separate effects of fly ash and rice husk ash in blended concrete are extensively studied, fewer works address their combined performance with egg shell powder (ESP). This review investigates how the combined use of fly ash (Class F) and RHA with ESP influences mechanical behavior and durability of hardened concretes and aims to identify an optimal cement-replacement level.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages13

Reading Time33 min

AccessFree to download

Abstract

Introduction

Background on Portland cement and environmental impact

Research gap: combined pozzolan performance

Objective of the investigation

Materials and experimental approach

Chemical and physical characterization of FA, RHA, ESP

Mechanical testing of mortars and concretes

Results and discussion

Setting time and strength trends across mix designations

Mechanism: C-S-H gel formation

Durability improvement of RA4

| | International Journal of Research Publication and Reviews
Journal homepage: [www.ijrpr.com](www.ijrpr.com) ISSN 2582-7421 | | --- | --- | | A Review Study of Compressive Strength of Concrete by Use of Fly Ash, Rice Husk Ash and Egg Shell Powder as Partial Replacement of Cement
Aman Sharma a, Prof. Kuldeep Pathak b, Prof. Anil Rajpoot c
a Research Scholar, Civil Engineering Department, Vikrant Institute of Technology & Management Gwalior,(M.P.) 474006 India b,cAssistant Professor, Civil Engineering Department, Vikrant Institute of Technology & Management Gwalior,(M.P.) 474006 India | | ABSTRACT: Fly ash and rice husk ash are the most common pozzolan and is being used worldwide in concrete works. It is generally realized that the use of pozzolan improves the properties of mortar and concrete. Several papers have been published on the study of performance offly ash and rice husk ash separately in blended concrete. However, only limited papers are available in the field of the combined performance offly ash and rice husk ash. The objective of present investigation is to evaluate the combined effect of fly ash (Class F) and rice husk ash (RHA) with an additive, egg shell powder (ESP) as the supplementary cementitious material with reference to the mechanical and durability properties of hardened concretes and to probe the optimal level of replacement. Fly ash is the utmost general pozzolan and is found extensively applied in concrete works. It is universally acknowledged that the employment of fine fly ash upgrades the quality of concrete. Even though the porosity of the paste is enhanced on account of the inclusion of fly ash, the average pore size gets decreased, resulting in a minimal porous paste. The interfacial domain between the aggregates and the matrix also gets refined and that paves way for the employment of fly ash. It is estimated that in India, the entire coal ash production exceeded 170 metric tons in 2010. With an eye on scaling up the employment of fly ash, and to finetune the property of concrete, several investigators have resorted to employment of large volumes of class-f fly ashes in concrete. The supplementary pozzolanic agent like RHA is an emerging high trend field. Rice husk ash consists of high silica substance in the shape of non-crystalline or amorphous silica. Hence, by this molecular structure it exhibits the cementitious property. The mill fired residues were further burnt at 650°C over a period of an hour and pulverized before they were used as cement replacement materials. Egg shells are the biodegradable waste obtained from chick hatcheries, bakeries, fast food restaurants. Among other biodegradable wastes, this can damage the surroundings and thus leads to ecological issues/contamination which would need appropriate treatment. In the ever soaring tasks to change waste to wealth, the efficiency of adopting eggshells to advantageous application constitutes a concept worth-recognizing. It is systematically acknowledged that the egg shell chiefly consists of calcium compounds. It is estimated that roughly 90 million tons of hen egg are generated throughout the world every year. In India, 77.7 billion eggs are produced in the year 2010-2011. In Tamil Nadu, amassing share of around 20 per cent, is ranked second with almost 2,000 crore eggs created in the state every year. By this objective, experiments were carried out in Two stages as per standard test procedures. In the initial stage, chemical composition, physical traits, and categorization of FA, RHA and ESP were executed. This included evaluation of consistency, initial setting time, final setting time, pH value and compressive strength of fly ash-f, rice husk ash and egg shell powder blended cements. The strength property of ESP blended cement mortars is also evaluated. In the second stage, ESP concrete mixes and a control mix were prepared with constant water to binder ratio of 0.5 for a design mix of 1:1.60:2.94 (for cube comp

FAQs

What is the main objective of combining fly ash, rice husk ash, and egg shell powder?

To evaluate the combined effect on the mechanical and durability properties of hardened concrete and to determine an optimal cement replacement level.

Why are fly ash and rice husk ash used in concrete?

They act as pozzolans that improve mortar and concrete properties by refining interfacial domains and supporting beneficial reactions.

How does ESP contribute and what mechanism is highlighted for strength development?

ESP helps through its cementitious contribution (rich in calcium compounds), while strength gain is attributed primarily to the formation of C-S-H gel.

Aug 25, 2026

Uploaded by Asher