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25-08-2012, 12:00 PM
Post: #1
Glass Powder Concrete ppt
Glass Powder Concrete



.pptx  Glass powder paper.pptx (Size: 4.34 MB / Downloads: 486)


Abstract

In this project we are going to replace the cement partially using glass powder which is rich in silica. Therefore, we have planned to prepare some numbers of cubes, cylinders and prisms using conventional concrete and going to test them for its strength and other properties then we are going to prepare concrete specimens using glass powder at various proportions like 5, 10 and 15%. The casted specimens are tested for its strength. From the test results, we are going to compare the behavior of glass powder concrete with conventional concrete. In this work we are going to use waste glasses, so the cost will be comparatively low when compared with normal concrete.

Introduction

Concrete is the most widely used building material in construction industry.
Its a homogeneous mixture of cement, fine aggregate, coarse aggregate and water.
The strength of concrete is mainly depends upon the cement content.
Cement is a finely pulverized material which by itself is not a binder
but develops the binding property as a result of hydration.
The binding nature of cement is due to the presence of silica.

Glass

Glass is an amorphous (non-crystalline) that in essence, a super-cooled liquid
and not a solid.
Glass can be made with excellent homogeneity in a variety of forms and sizes from small fibers to meter-sizes pieces.
Primarily glass is made up of sand, soda ash, limestone and other additives (Iron, Chromium, Alumina, Lead and Cobalt).
Glass has been used as aggregates in road construction, building and masonry materials.

Applications & properties of glass'

Glass is a uniform amorphous solid material, usually produced when the viscous molten material cools very rapidly to below its glass transition temperature, without sufficient time for a regular crystal lattice to form.
The most familiar form of glass is the silica-based material used for windows, containers and decorative objects.
Glass is a biologically inactive material that can be formed with very smooth and impervious surfaces.

Advantages of using glass powder in concrete

The reuse of very finely ground waste glass in concrete has economical and technical advantages.
If the glass could be ground to a very fine size, it could satisfy the active pozzolanic behavior.
Glass waste is recognized to be increasing year by year in a large volume from shops, construction areas and factories.
These waste storage disposals are becoming a serious environmental problem.
Thus usage of waste glass in construction sector is advantageous as the construction cost decreases.

Experimental work

The waste glass is collected from various places such as construction sites, industries, etc.,. Then it is crushed and ground to a size fine enough to achieve its pozzolanic behavior. cement is now partially replaced by its weight by glass powder at varying rates such as 5%, 10% and 15%.
Various laboratory tests to determine the specific gravity, consistency, setting time of normal Portland cement and cement mixed with glass powder at different rates is carried out. With these results, the control mix, utilizing glass powder replaced as cement is to be designed for cube, cylinder and prism.
Now, 4 cubes, 4 cylinders -- such as four specimens for each combination – is to be casted for the whole and cured at room temperature.
At the end of curing period, each specimen is tested for compressive and tensile strength and the average is recorded.

Conclusions

From the above test results it is concluded that
Conventional concrete shows a 3days compressive strength as 9 N/mm2 and tensile strength of 0.95 N/mm2
5% replacement of glass powder in cement will increases the compressive strength by 37% in 3days
10%replacement of glass powder increases the compressive strength by 52.6 % in 3days
10% replacement of glass powder in cement will increases the tensile strength by 39.8% in 3days 
Glass powder concrete increases the compressive strength as well as tensile strength effectively.
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