SMT. S.R.PATEL ENGINEERING COLLEGE,

DHABHI, UNJHA.

PRESENTATION

ON

“ARTIFICIAL SAND USE IN PLASTER MORTAR”

Guide:

Prof. Amar Salariya

Presented By: •Savaliya Hiren - 100783106010

•Patel Rahul - 100783106002

•Shukla Naveen - 090780106063

•Rajput Narendra -090780106056

INTRODUCTION

1) To provide alternative material for natural sand

2) Use of crushed sand 3) Use of admixtures, fibers 4) Advantages over natural sand

NECESSITY

❖ Technical Aspect

•Natural Sand - weathered particles of rock

• Less fine particles

•Available sand is course and contains silt and clay

•Fine particles below 600 micron must be present up to 30 -

50%

• Quality of natural sand varies from place to place

• Crushed sand is available according to size and grade

Environmental Impact

• In traditional construction techniques, river sand is used

• Due to dragging from river bed, water head is reduced

• Lower ground water level

• Extinction of river sand

1. Recent Tradition (Market Survey)

Collection and study of recent market trends in cement plaster

mortar

2. Mixing Proportion

Preparation of various mix proportion

3. Testing of mixing proportion

Behavior of mix proportions under various parameters viz.

bonding, strength etc.

METHODOLOGY

4. Testing of mixing proportion along with admixtures and fibers

Effect of admixtures and fibers on various mix proportion

5. Result comparison

Comparative analysis of different mix proportion

6. Comparison of river sand and crushed sand plaster mortar

Comparison considering factors such as environmental effect,

cost analysis etc

PARAMETERS

• Strength

• Durability & Economy

• Fineness

• Bonding

• Workability

• Waterproofing

• Shrinkage and cracking prevention

•Crushed Sand

- Graded sand

(1) 2.36 mm passing & 150 micron retaining

(2) 2.36 mm passing & 300 micron retaining

- Non graded crushed sand

• Fly Ash

- Reduces cement consumption

- Increases finish-ability & workability

- Eco friendly

• Cement

- OPC (43 Grade)

• Micro Silica

- Increases bonding

- Reduction in cracks

- Prevents water seepage

- Better surface finishing

• Poly fibers (Grade-2)

- Prevents cracks

- Increases tensile strength & bonding

• Admixture - Naphthalene

- Produces concrete with high levels of workability without segregation

- Provides improved finish-ability and surface finishes

- Provides water reduction

(1) Sample 1

• Proportion - 1:6

• Fly Ash was not used

• W/C Ratio - 0.70

• River Sand - 2.36mm Passing & 150 micron Retained

✓ Observation

- No cracks were developed.

- Smooth finishing easily achieved.

- Less economical.

Mixtures

(2) Sample 2

• Proportion - 1:6

• 15% Fly Ash

• W/C Ratio - 0.70

• Crushed Sand - 2.36mm Passing & 150 micron Retained

✓ Observation

- Initially good finish was observed.

- Cracks were developed after drying.

(3) Sample 3

• Proportion - 1:6

•Fly Ash was not used

•W/C Ratio - 0.70

•Crushed sand - 2.36mm Passing & 150 micron Retained

✓ Observation

- No cracks were developed.

- Smooth finishing was not achieved.

- Less economical.

(4) Sample 4

•Proportion - 1:6

•15% Fly Ash

•Micro silica - 2% of cementitious material

•W/C Ratio - 0.90

•Crushed Sand - 2.36mm Passing & 300 micron Retained

•Fibers - 0.35% of cementitious material

✓ Observations:

- Poor bonding with surface

- Poor finishing

- Less economy

- More water was required

- More wastage of mortar

(5) Sample 5

•Proportion - 1:6

•15% Fly Ash

•Micro silica - 2% of cementitious material

•Naphthalene - 0.5% of cementitious material

•Fibers - 0.4% of cementitious material

•W/C Ratio - 0.70

•Crushed Sand - 2.36mm Passing & 300micron Retained

✓Observations:

- Good bonding

- Less surface finishing

- No cracks were developed

- Not economical

(6) Sample 6

•Crushed sand - Non Graded sand

•Proportion - 1:6

•10% Fly Ash

•Naphthalene - 0.5%

•W/C Ratio - 0.70

✓ Observations:

- Good bonding with surface

- Perfect finishing

- Better economy

- Less wastage of mortar

CUBE TESTING

DIMENSION: 10 cm x 10 cm x 10 cm

COMPARISON OF QUANTITY OF MATERIAL

MATERIAL SAMPLE 1 SAMPLE 2 SAMPLE 3 SAMPLE 4 SAMPLE 5 SAMPLE 6

FLY ASH 15% --- 25% 15% 15% 10%

CRUSHED SAND GRADED GRADED GRADED GRADED GRADED NON

GRADED

FIBERS --- --- 0.6% 0.4% 0.35% ---

ADMIXTURE

(NAPHTHALENE) --- --- --- --- 0.5% 0.5%

MICRO SILICA --- --- --- 2% 2% ---

COMPARISION OF RESULT OF

COMPRESSIVE STRENGTH OF SAMPLE

SAMPELS

COMPRESSIVE STRENGTH

(N/mm2)

7 Days 21 Days

SAMPLE - 1 7 10.5

SAMPLE – 2 6 11

SAMPLE - 3 8.5 12

SAMPLE – 4 8 11

SAMPLE – 5 7.5 12

SAMPLE – 6 12 24

Factors Plastering using River

Sand

Plastering using

Crushed Sand

Time Less time consuming Need more time

Finishing Easily achieved Quite tough to get good

finishing

Availability

of sand Not easily available Easily available

Texture of sand Non-uniform particles Uniform particles are

available

Watering Less watering is needed

before plastering

Wall should be cured

fully before plastering

COMPARISON OF RESULTS

CRITERIA SAMPLES

1 2 3 4 5 6

BONDING Good Average Good Poor Good Good

FINISHING Average Good Poor Poor Less Good

COST Less Less More More More Less

WATER

REQUIREMENT Average Average Average More More Average

WASTAGE OF

MORTAR Less Nominal Less More More Less

DEVELOPMENT

OF CRACKS Average Yes No No No No

RATE ANALYSIS

Sr.no. Material Rate in Rs.

Plaster

using

Crushed

sand

Plaster

using

Natural

sand

1 Cement 260/bag 1900.314 /- 2111.46 /-

2 Crushed sand 2500/ brass 1435 /- --

3 Natural sand 4500/ brass -- 2583 /-

4 Fly ash 90 paisa/kg 36.54 /- --

5 Naphthalene 30/kg 73.69 /- --

TOTAL Rs. 3445.54 /- 4694.46 /-

Rate of the material for their perspective unit and for the quantity required for

100 sq. m of plaster.

OUT COME OF THE PROJECT

1. ECOFRIENDLY

(a) USE OF WASTE MATERIAL

(b) LESS POLLUTION

2. EASY AVAILABILITY

3. ECONOMICAL

Among all mixtures Sample - 6 containing non graded

crushed sand, fly ash, cement and admixture naphthalene gave

required results, viz. better surface finish, perfect bonding with the

wall, less or no wastage, and most important economic compared to

conventional plaster. Compressive strength test of a cube has been

conducted to check the compatibility of mix. Standard mix having

natural sand carries compressive strength of 10 to 12 N/mm2.

Whereas this mixture yields 12 N/mm2 of compressive strength for 7

days and 24 N/mm2 for 21 day strength. It concludes that the mixture

is far more versatile than conventional mixture.

CONCLUSION

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