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Concrete Mix Design with Partial Replacement of Cement using Fly Ash

Target year: SE Sem 3-4 (Mini-Project-I) AICTE: 2 credits · ~50 hrs Bloom: Apply MU CBCS: CIV403 Mini-Project 1A/1B

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About this project

Design M25 grade concrete mix with 10%, 20%, and 30% replacement of cement by fly ash. Cast cubes, cure for 7, 14, 28 days, test compressive strength. Compare with reference (0% replacement) and find optimum fly ash content.

Course Learning Outcomes (CLOs):
CLO1: Apply IS 10262 mix design methodology.
CLO2: Conduct cube compressive strength tests per IS 516.
CLO3: Analyze strength-vs-replacement curves and identify optimum.
CLO4: Communicate engineering findings with proper graphs + tables.

Industry/societal relevance: Cement production = 8% of global CO2. Indian infra (NHAI, MMRDA, MMRC) increasingly demands fly-ash blended concrete — placement-relevant for L&T, Tata Projects, Shapoorji.

Milestones

1. Mix Design Calculations

15 marks 5d

Calculate proportions for M25 reference + 3 fly-ash replacement ratios. Submit calculation sheet.

2. Material Testing

20 marks 10d

Test cement (consistency, setting time), aggregates (sieve, specific gravity), fly ash. Document properties.

3. Cube Casting + Curing

25 marks 12d

Cast 36 cubes (4 mixes × 3 ages × 3 specimens). Cure in water tank. Maintain casting log.

4. Compression Testing

20 marks 14d

Test cubes at 7, 14, 28 days on CTM. Record loads + failure modes. Compute strengths.

5. Analysis + Report

20 marks 9d

Strength vs replacement curves. Identify optimum %, document cost savings + CO2 reduction. 8-page report.

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Skills you'll learn

Concrete TechnologyMix Design (IS 10262)Materials TestingLab ProceduresData AnalysisSustainability concepts

Tools used

Concrete mixerCube moulds (150mm)Compression Testing Machine (CTM)Slump coneSieve setFly ash (Class F from RMC plant)CementAggregates

Prerequisites

Engineering Materials; Concrete Technology basics; lab safety induction

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