AL-Najah National University Faculty Of Engineering . EFFECT OF GLASS POWDER ON THE MECHANICAL PROPERTIES OF MORTAR. Designed by : Sameh Zabadi Taher Sameer Shaker Alhanbly. EFFECT OF GLASS POWDER ON THE MECHANICAL PROPERTIES OF MORTAR. What is Concrete ? .
EFFECT OF GLASS POWDER ON THE MECHANICAL PROPERTIES OF MORTAR
Designed by : SamehZabadiTaherSameer
Concrete : is a composite construction material composed of cement (commonly Portland cement) and other cementitious materials such as fly ash and slag cement, aggregate (generally a coarse aggregate made of gravels or crushed rocks such as limestone, or granite, plus a fine aggregate such as sand), water, and chemical admixtures.
The word concrete comes from the Latin word "concretus" (meaning compact or condensed), the perfect passive participle of "concresco", from "com-" (together) and "cresco" (to grow).
The objective of this study is to show:
1- the effect of adding Glass Powder to concrete to improve the properties of concrete.
2- The effect of adding Glass Powder as an admixture on the durability and the thermal insulation .
3- The benefits of addition Glass Powder is to minimize the risk of the Environmental Pollution.
In 2009, Engineer ImadQasimdoing a study on the impact of glass powder on concrete and he was made some tests ; These tests include compressive strength, flexural strength, and flow table test (workability test).
Twenty kilograms of glass powder was used as a partial replacement for cement and sand (silica and limestone) by 0%, 10%, 15%, and 20%. Seven mortar mixtures were tested at room temperature, four mixtures were cured by water and three mixtures were cured by high pressure steam curing (autoclaving).
We will crash fourty five kilograms of waste flat glass and prepare it as powder to be used as cementitous or filler materials in mortar mixes.
In Those mixtures waste glass powder we used them as replacement of cement or sand at percentage 0% , 5% , 10% , 15% , in order to show the effect of waste glass powder on the mechanical properties of mortar and the thermal insulation .
There are many types of concrete available, created by varying the proportions of the main ingredients below. By varying the proportions of materials, or by substitution for the cemetitious and aggregate phases, the finished product can be tailored to its application with varying strength, density, or chemical and thermal resistance properties.
The mix design depends on the type of structure being built, how the concrete will be mixed and delivered, and how it will be placed to form this structure.
Concrete is strong in compression, as the aggregate efficiently carries the compression load. However, it is weak in tension as the cement holding the aggregate in place can crack, allowing the structure to fail. Reinforced concrete solves these problems by adding either steel reinforcing bars, steel fibers, glass fiber, or plastic fiber to carry tensile loads.
Workability is the ability of a fresh (plastic) concrete mix to fill the form/mold properly with the desired work (vibration) and without reducing the concrete's quality. Workability depends on water content, aggregate (shape and size distribution), cementitious content and age (level of hydration), and can be modified by adding chemical admixtures, like superplasticizer. Raising the water content or adding chemical admixtures will increase concrete workability. Excessive water will lead to increased bleeding (surface water) and/or segregation of aggregates (when the cement and aggregates start to separate), with the resulting concrete having reduced quality.
Different tests have been developed on workability :
1-Slump test .
2-Flow test .
3-Subjective assessment .
4-Penetration test .
5-Mixer test .
6-Remolding test .
7-Compaction test .
In 28 days
In 28 days
In 7 days
In 28 days
We obtained significant results for this test ( compressive strength test ), because the results resemble the results very closely that Eng : Imad Al-Qasem found in and support his M.Sc. Thesis .
basically the apparatus consists of tow plates with dimensions of (54*54) cm, one is upper the other other is below, knowing that the upper is flexible , and we can move it, as needed.
- heating the upper plate to constant temperature .
-Putting any material between plates .
- the heat well transfer through the material to the lower plate .
- the apparatus well calculate the heat transfer rate, and given the value of conductivity of the material.
The results show that there is not a significant effect measured when the glass powder is replaced with either cement or limestone. There is not a significant difference. The results are very close to each other and resemble each other; the obtained results do not differ significantly. The error on third one happen because we have voids in it and it wasn’t made right.
Disk & wear plates
Abrasion test stand
- Conduct experiments on durability and Permeability
- After we increase the percentage into more than 15%, what would happen to the compressive strength?
- Check if the percentage in strength is good enough to make the change or what?