An Experimental Study on Partial Replacement of Coarse Aggregat by Using Pebble Stone in Concrete

An Experimental Study on Partial Replacement of Coarse Aggregat by Using Pebble Stone in Concrete

SAETM-24 International Journal of Engineering Research & Technology (IJERT)

Ms.D. KOWSALYAa SANJEEVAN Sb, ABDUL ANSAR Mb, FAZIL FIROZ PYb,THANGAMANI Rb

aAssistant professor, Department of Civil Engineering,

Shree Venkateshwara Hi-Tech Engineering College, Gobichettipalayam, Erode-638455, Tamilnadu, India.

bFinal Civil, BE Civil Engineering, Department of Civil Engineering, Shree Venkateshwara

Hi-Tech Engineering College, Gobichettipalayam, Erode-638455, Tamilnadu, India.

ABSTRACT

This study is an experimental on the coarse aggregate element in concrete comprises 60%-75% of the total volume. In this experimental study the coarse aggregate was replaced by pebble stone in the range of 0%,10%, 20%, and 30%. This mix design of concrete for M30 grade is done. The partially replacement of coarse aggregate by pebble stone the strength parameters of concrete have been studied. The physical, mechanical and durability properties of concrete.

keyword:M30 Grade, Pebble stone,

compressive strength, split tensile strength.

INTRODUCTION

General

Concrete is nothing but the mixture of cement, fine aggregate, coarse aggregate, water with required proportion. Pebble stone have long served as essential components in various construction and landscaping projects revered for their aesthetic structural support and drainage properties.

OBJECTIVE

Evaluate the fresh and hardened properties of concrete mixes containing varying percentages of pebble stone as a partial replacement for coarse aggregate. This includes assessing workability, compressive strength, flexural strength, and other relevant mechanical properties.

SCOPE

The scope of this project is consumption of coarse aggregate can be reduced significantly if Pebble stone is used as a partial replacement without compromising performance characteristics of concrete including durability. This may include replacement levels ranging from 10% to 30% by volume or weight.

ADVANTAGES

Itleadstoconsiderablereductionin coarse aggregate consumption. Itgiveshighcompressivestrength and highflexuralstrength.

Itreducesthepermeabilityofconcretetoc hlorideandwaterintrusion considerably.

It is themosteco-friendly reducing carbon footprint associated with transportation andreducethepollution

Selection of Title

Literature Review

Material Collection

Material Testing

Mix proportion & Design

Replacement of 10%,20%,30%

by Coarse Aggregate

Curing of Specimens

Testing of Specimes

Result

METHODOLOGY

MATERIALS CHARACTERISTICS

Cement

Cement is a fine, soft powder used as a binder because it hardens after contact with water. It is produced from a mixture of limestone and clay. OPC cement are using 53 grade cement for concrete

M Sand

The full form of M sand is Manufactured Sand. This is an artificial type of sand formed by crushing rocks or granite. It is used as a substitute of river sand. M-sand can be used for construction of walls with a cement to sand ratio of 1:3.

Coarse aggregate

Coarse aggregates are a constructioncomponent made of rock quarried from ground deposits. The usual range employed is between 9.5mm and

37.5mm in diameter Typically the most common size of aggregate used in construction is 20mm.

Pebble stones are small, rounded rocks typically found near bodies of water such as rivers, beaches, or lakes. They come in various shapes, sizes, and colors, depending on the geological composition of the area where they are formed. People often use pebble stones for decorative purposes in landscaping, garden paths, or as a surface for driveways. Additionally, they are sometimes used in crafts or as part of aquarium or terrarium setups. The smooth, rounded texture of pebbles makes them pleasant to touch and visually appealing, adding a natural element to outdoor and indoor spaces.

Water

Water is the key ingredient, which when mixed with cement, forms a paste that binds the aggregate together.The water causes the hardening of concrete through a process called hydration.

CHARACTERISTICSOF MATERIALS

Cement

M Sand

Coarse Aggregate

Pebble Stone

TESTING

COMPRESSIVESTRENGTHFOR PEBBLE STONE

Compressive strength after 7 days for cube

Compressive strength after 14 days for cube

RESULT COMPRESSIVESTRENGTHFOR PEBBLE STONE

SPLIT TENSILE PEBBLE STONE

20

19

18

17

16

15

14

0%

10%

20%

30%

STRENGTH FOR

Compressive strength after 7 days for concrete

Splittensilestrengthofcylinderfor7days

Splittensilestrengthofcylinderfor14 days

Compressive strength after 28 days for concrete

35

34.5

34

33.5

33

32.5

32

31.5

31

30.5

0%

10%

20%

30%

Comparisonbetweencubicstrengthaccor dingto 7 days and 28 days

35

30

25

20

15

10

5

0

0%

10%

20%

30%

4

3.5

3

2.5

2

1.5

1

0.5

0

0%

10%

20%

30%

SPLIT TENSILE STRENGTH FOR PEBBLE STONE

1.95

1.9

1.85

1.8

1.75

1.7

1.65

1.6

1.55

1.5

1.45

0%

10%

20%

30%

Splittensilestrengthofcylinderfor7days

4

3

2

1

0

0%

10%

20%

30%

Splittensilestrengthofcylinderfor14 days

Comparisonbetweencubicstrengthaccor dingto 7days and 28 days

CONCLUSION

In this project, an experimental study has been conducted on concrete byvarying the percentage of pebble stone as 0%, 10%, 20%

and 30% respectivelytostudythe increasein the

compressivestrengthofconcrete.

• Thecompressivestrengthofcon ventionalconcreteat28daysis32.15MPa and20% pebble stone concrete is 34.05 MPa, it shows the 6.24 % improvementformconventionalconcret e.

• The split tensile strength of conventional concrete for 28 days is found to be 3.1MPa and that for 20% pebble stone concrete is 3.73 MPa. It shows the 16.89%improvement from conventional concrete. The optimum use of pebble stone is20%.

Finally, from the experimental analysis we have found that 20% replacement ofpeddlestonewith coarseaggregateinconcreteisbeneficialrepla cement.

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