Lightweight Concrete Blocks

FINAL YEAR PROJECT

The Use Of Lightweight Concrete Blocks In Multi-story Buildings.

By

Farhat Ullah

S M Tariq Shah

Group # 25

Supervisor:

Prof. Dr. Qaisar Ali

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CONTENTS

• Introduction• Problem statement • Objective• Methodology • Experimental data• Results• New methodology • Gantt chart

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INTRODUCTION

• Lightweight concrete has unit weight< 120pcf

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• Lightweight concrete can be produced by:1. Lightweight aggregates:

• Natural lightweight aggregates.• Artificial lightweight aggregates.

2. Admixtures:• Air entraining.• Admixtures that evolve gases.• Examples are chemrite Aer, lightcrete 02, aluminium powder.

• Construction chemicals suppliers in Pakistan are Sika, Imporient, Pagel and Apepak.

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PROBLEM STATEMENT

• Solid bricks are used in high rise buildings.

• Causing heavy dead load.

• Causing more base shear.

• Greater stresses are generated.

• More reinforcement and heavy sections are needed.

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OBJECTIVE

Reducing the weight of masonry unit.

•Which can be achieved by:

• Using hollow bricks.

• Using hollow blocks.

• Using hollow blocks in lightweight concrete.

• Using solid blocks in lightweight concrete.

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METHODOLOGY

• We will use chemrite aer and lightcrete 02.

• We will test the efficiency of these admixtures in concrete and sandcrete samples.• Standard Samples

• Concrete (2000psi)• Sandcrete (1:3)

• Chemrite Aer (0.03%-0.15% )• Concrete (0.15%)• Sandcrete (0.15%)

• Lightcrete -02 (0.5%-1%)• Concrete (1%)• Sandcrete (1%)

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EXPERIMENTAL DATA

Sampletypes

No. Of samples

Dosage%age

Unit Weight

pcf

Strengthpsi

Standard 6 nil 140 2770

Chemrite Aer

6 0.15 140 2540

Lightcrete -02

3 1 136 1050

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Concrete Samples

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EXPERIMENTAL DATA

Sampletypes

No. Of samples

Dosage%age

Unit Weight

pcf

Strengthpsi

Standard 3 nil 112 2773

Chemrite Aer

3 0.15 112 2250

Lightcrete -02

3 1 110 792

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Sandcrete Samples

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Sampletypes

Unit Weight Reduced(%age )

Strength Reduced(%age )

Chemrite Aer

0 8.3

Lightcrete -02

2.86 62.1

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Performance In Concrete

RESULTS

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Sampletypes

Unit Weight Reduced(%age )

Strength Reduced(%age )

Chemrite Aer

0 18.86

Lightcrete -02

1.78 71.44

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Performance In Sandcrete

RESULTS

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NEW METHODOLOGY

• Contacting other suppliers like Sika, BASF and Pagel for

admixtures.

• Using aluminium powder.

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NEW METHODOLOGY

• Using foaming agents from BASF:

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NEW METHODOLOGY

• Using foaming agent:Rheocell 10 • Dosage: 2% - 10% by weight of

cement.• Efficiency: density can be

reduced up to 80 pcf.

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NEW METHODOLOGY

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• Using aluminium powder:• Dosage: 0.01% - 1% by

weight of cement.• Efficiency: density can be

reduced up to 80 pcf.

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• Using foaming agent:Sandcrete sample: 1:1

• Dose: 6%

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EXPERIMENTAL DATA

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EXPERIMENTAL DATA

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• Using aluminium powder:• Sandcrete sample: 1:1

• Dose: 0.05%

• Concrete sample: 1:2:2• Dose: 0.01%, 0.05% and 1%

• Using aluminium powder:

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EXPERIMENTAL DATA

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• Using aluminium powder:

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EXPERIMENTAL DATA

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• Using aluminium powder:

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EXPERIMENTAL DATA

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• Using aluminium powder:

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EXPERIMENTAL DATA

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• Using aluminium powder:

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EXPERIMENTAL DATA

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• Using aluminium powder:

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EXPERIMENTAL DATA

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GANTT CHART

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Thanks

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