BY P.ROHITH

S.NIHARIKA A.RANJITH B.AKSHAY P.JEEVAN

Partial Replacement of Cement with Marble Powder

Objective of the project IntroductionNominal Mx DesignTest Results and GraphsConclusion

Contents

Composition of Marble powder

ObjectiveThe objective of the project is to study the behavior of marble dust concrete for water curing. Also we are interested to study the compressive strength of marble dust concrete for 0%, 5%, 10%, 15% & 20%. Replacement of cement by marble dust for water curing.The concrete specimens are then allowed for 7 and 28 days for water curing . Then test will give us the nature of profile compressive strength variations and this variations can be effectively repre-sented by means of graph.

• Marble is industrially processed by being cut, polished, and used for decorative purposes, and thus, economically valuable.

• In marble quarries, stones are cut as blocks through different methods• During the cutting process, 20-30% of a marble block becomes waste marble

powder.Marble powder is a waste material generated in considerable amounts in

the world• Marble waste leads to a serious environmental problem as well• Hence the reuse of waste material has been emphasized.Waste can be used to

produce new products or can be used as admixtures so that natural resources

are used more efficiently

ABSTRACT

• Blended cements based on the partial replacement of Portland cement clinker (PC) by wastes have been the subject of many investigations in recent years

• These materials participate in the hydraulic reactions, contributing significantly

to the composition and micro structure of hydrated product• In building industry, Marble has been commonly used for various purposes like

flooring, cladding etc., as a building material since the ancient times• The industry's disposal of the marble powder material, consisting of very fine

powder, today constitutes one of the environmental problems around the world• In India, marble dust is settled by sedimentation and then dumped away which

results in environmental pollution, in addition to forming dust in summer and

threatening both agriculture and public health

INTRODUCTION

• It takes 1.5 cubic meter of total material to prepare one cubic of concrete, be-cause cement and sand fills the gaps between the aggregate (crushed stone).

• Let’s design M20 grade concrete.• Ratio for M20 concrete is 1:1.5:3

CALCULATIONS:

For M20 take w/c Ratio=0.5

weight of concrete is 2400X3375x10-6=8.1 Kgs

the proportional weight of cement is given as (1/5.5)x8.1=1.472 Kgs

the weight of fine aggregate is given as =(1.5/5.5)x8.1=2.209 Kgs

the weight of coarse aggregate is given as =(3/5.5)x8.1=4.4181 Kgs

NOMINAL MIX CONCRETE DESIGN FOR ONE METRE CUBE OF M20 CONCRETE

The weight of fine aggregate is given as =(1.5/5.5)x8.1=2.209 Kgs the

weight of coarse aggregate is given as =(3/5.5)x8.1=4.4181 Kgs

Now we know the weight of cement

Also we know the w/c ratio to calculate the quantity of water for the mix

w/c ratio = 0.5 =

cement ofweight waterofweight

0.5 =weight of water/1.472

weight of water=736 ml

On the other hand, we need to calculate amount of marble powder by replacing with cementfor 5% of marble powder we get the weight as =1.472x.05 =73.6 gmsweight of cement required =1.472-73.6 =1.398 Kgamount of coarse aggregate and fine aggregate was similar as previous calculations

% of marble powder

wt of marble powder(gms)

wt of cement (Kgs)

0% 0 1.4725% 73.6 1.39810% 147.2 1.32415% 220.8 1.25120% 294.4 1.177

Quantity of material for one cube

• COMPRESSIVE STRENGTH – 7 DAYS

TESTING OF HARDENED CONCRETE

% of marble powder

Load(KN) CompressiveStrength(Mpa)

0% 340 165% 405 1810% 430 19.1115% 325 14.4420% 270 12

Compressive strength graph after 7 days

0% 5% 10% 15% 20% 25%0

5

10

15

20

25

1618 19.11

14.4412

Y-Values

• COMPRESSIVE STRENGTH – 14 DAYS

% of marble powder

Load(KN) CompressiveStrength(Mpa)

0% 390 19.335% 442 21.64410% 474 24.06615% 369 17.7220% 330 16.66

Compressive strength graph after 14 days

0% 5% 10% 15% 20% 25%0

5

10

15

20

25

30

19.3321.644

24.066

17.72 16.66

Y-Values

• COMPRESSIVE STRENGTH – 28 DAYS

% of marble powder

Load(KN) CompressiveStrength(Mpa)

0% 550 24.445% 600 26.6610% 660 29.33315% 452.5 20.1120% 420 18.66

Combined graph of 7,14 and 28 days

0 0.5 1 1.5 2 2.5 30

Y-Values

0% 5% 10% 15% 20% 25%0

5

10

15

20

25

30

35

19.3321.644

24.066

17.73 16.66

24.4426.66

29.33

20.11 18.6616

18 19.11

14.4412

Chart Title

WorkabilityIt is observed here that degree of workability is medium as per IS 456-2000. The slump values of the concretes obtained from waste marble granules mix gave negligible effect as compared to normal concrete mix

Slump Value for Concrete Mix% of Replacement Slump value (mm) 0 55 5 57 10 63 15 65 20 66

0 5 10 15 204850525456586062646668

5557

6365

66

Slump test Graph

Casting of cubes

Test specimens after 28 days curing

Test specimens after 28 days curing

Testing of the specimen

failure of cubes

Conclusions• Compressive strength increases with increase of marble powder • Upto to 10% replacement of cement there is increase in all me-

chanical properties • The optimum percentage for replacement of marble powder with

cement and it is almost 10% cement for cubes• The replacement of 10% cement with waste marble powder attains

maximum compressive strength • To minimize the cost of construction with usage of marble powder

which is freely or cheaply available • More importantly to realm of saving the environmental pollution by

cement production ; being the main objective as civil engineers

THANK YOU