Hi, I'm Saeid Ebna Maleque. I'm trying for a Conference Paper on "Rheology and Mechanical Properties of Recycled Waste Glass Concrete as Replacing of Fine Aggregate" . It's Part of Structural and Earthquake Engineering Ask Me Anything on it !

Saeid Ebna Maleque Roky
Aug 22, 2017

I am studying on structural engineering. I have learnt few softwares. Now I'm making a research  paper on structural Engineering for a conference which is close to December .I have submited abstract for persmission. 

My Title of the paper is 

"Rheological and Mechanical Properties of Recycled Waste Glass Concrete as Replacing of Fine Aggregate"

The main focus of the research is using glass as admixture with reinforce concrete. It will either increase strength or decrease the strength. I'm on various experince about the field. I think You also very much oriented about the research. if have any idea on this filed , share here I will make a beautiful conversation. Thank You 

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What is the prime cost of such concrete on an industrial scale?

Aug 22, 2:47PM EDT0

One of the primary benefits of concrete, aside from its durability and stability, is its versatility. Ready-mix poured concrete comes in a variety of strengths, but homeowners can also order it in a number of decorative finishes that impart color or textural effects to a space.

  • Stamped concrete costs vary widely depending on the colors and patterns desired for the final effect. Basic installation costs between $8 and $12 per square foot and typically incorporates one pattern and one color. Mid-range installation costs $12 to $18 per square foot and incorporates upgrades such as different border colors and areas of contrasting patterns. High-end stamped concrete costs $18 or more per square foot and can include several patterns, mixed hues, and hand-colored or hand-scored patterns.
  • Stained concrete is a less-costly alternative to stamped concrete because color is applied to the surface, not blended into the material. Expect to pay approximately $2 to $4 per square foot for concrete staining that involves application of one stain color and protective sealant. Stain projects can also expand to include border designs, stenciling, and multiple colors, which can increase the price to $15 per square foot.
Aug 22, 5:06PM EDT0

What equipment is used to add glass to concrete?

Aug 22, 2:34PM EDT0

Twin Shaft concrete mixture machine 

Aug 22, 5:09PM EDT0

Where do you conduct your experiments?

Aug 22, 2:13PM EDT0

I am studying in buildingEngineering and Construction Management

I have a lab in my department at Khulna University of Engineering and Technology . I will do the tests there 

Aug 22, 5:08PM EDT0

Why did you choose this topic for your work?

Aug 22, 1:53PM EDT0

it is my primary topics. I am studying on it for reducing the traditional use of concrete. I'm trying to find out same strength from admixtures of waste glass and concrete.

Aug 22, 2:12PM EDT0

Do you plan to disclose the findings of your research?

Aug 22, 1:46PM EDT0

I'm trying to complete my research. It is a long term research. 

Aug 22, 1:56PM EDT0

Where can I use concrete mixed with recycled glass?

Aug 22, 1:25PM EDT0

It can be used in beam, slab, column in any super or sub structures .

Aug 22, 1:52PM EDT0

How can the use of concrete with an admixture of glass affect the cost of construction projects?

Aug 22, 1:07PM EDT0

this admixture will reduce the cost of fine sand because we are using waste glass here . 

Aug 22, 1:49PM EDT0

What should glass be so that it can be added to concrete?

Aug 22, 1:04PM EDT0

Alkali-silica reaction must be consideredWhen using glass aggregate outdoors, or anywhere else that the concrete will be exposed to moisture, beware of the dreaded alkali-silica reaction, an unhappy phenomenon in which the silica in glass and the alkali in cement create a gel that swells in the presence of moisture. The reaction may happen right away or it may take 20 years, but in either case it can cause cracking. Any source of moisture can set it off, including mopping, using excess water in the concrete mix, and so forth.

But the alkali-silica reaction can be prevented. Engineers at Columbia University, committed to developing more environmentally friendly building materials, discovered that the reaction can be avoided if the glass is ground finely enough to pass through 50-mesh or smaller screen. They also found that the mineral admixture metakaolin will suppress the reaction — an effective but expensive solution.

Aug 22, 1:23PM EDT0

Alkali-silica reaction must be considered to add the admixtures 

Aug 22, 1:56PM EDT0

How do you conduct your experiments? What are you doing for this?

Aug 22, 12:54PM EDT0

It is a long term process. First I and my partner has studied some papers on it. Then We are trying to make a proportion of Materials with a mix design.  Then We have calculated bearing capacity of the beam Where we put the admixtures. Then we will test curing of 7 days, 28 days, 56 days with a slump tests. in admixtures, waste glass is used as a partial replacement of fine grade aggregate. Finally, an experiment we will find out an output  

Aug 22, 1:05PM EDT0

Are there any other studies on this issue?

Aug 22, 12:34PM EDT0

There are a lot of studies on it. Please check Google scholar and search about recycled used glasses. you will get a lot of paper related to this plate 

Aug 22, 1:07PM EDT0

What are the results of your experiments to date?

Aug 22, 12:16PM EDT0

After Seven days experiment the strength was better than only mixtures of concrete. After 28 days it becomes more strong and after 56 days it is gathering more strong. But It is now also under an experiment 

Aug 22, 1:12PM EDT0

Who helps you with your research?

Aug 22, 12:13PM EDT0

The previous study about mechanical properties of Glass, my supervisor professor , my partner help me always 

Aug 22, 1:13PM EDT0

Is this kind of concrete more or less susceptible to earthquake damage than the regular kind?

Aug 22, 5:28AM EDT0

Structural engineers use steel reinforcing bars known as rebar to make the columns stronger and more flexible. The rebar forms a cage inside the concrete, allowing it to crack and bend without crumbling. After the 1971 Sylmar earthquake, building codes required new concrete structures to have more of these steel supports. The code did not address existing buildings. Experts said the only way to know whether a concrete building is at risk is to have an engineer inspect it

A good property of concrete like concrete has relatively high compressive strength, but significantly lower tensile strength.  As a result, without compensating, concrete would almost always fail from tensile stresses, loaded in compression. The practical implication of this is that concrete elements subjected to tensile stresses must be reinforced with materials that are strong in tension (often steel). The elasticity of concrete is relatively constant at low-stress levels but starts decreasing at higher stress levels as matrix cracking develops. Concrete has a very low coefficient of thermal expansion, and as it matures concrete shrinks. All concrete structures will crack to some extent, due to shrinkage and tension. Concrete which is subjected to long-duration forces is prone to creep. The density of concrete varies but is around 2,400 kilograms per cubic meter (150 lb/cu ft

Aug 22, 11:54AM EDT60
Show all 5 replies

How important is it to have an innovative mind in this kind of job?

Aug 22, 4:34AM EDT0

Actually, we use sand, aggregate water in a concrete as a tradition. it is more costly. When We will think something new on this field then we can reduce the cost for the same strength. 

Aug 22, 1:51PM EDT0

What new engineering specialty skills have you developed?

Aug 22, 4:05AM EDT0

I'm trying to make new admixtures of the same strength. Since I'm on primary stage I will have to study a lot. in future then I can say what I have added. so now I can not say anything about it . 

Aug 22, 2:18PM EDT0

How many types of engineering specialties are there?

Aug 22, 12:56AM EDT0

Structural and Management with estimating are the main engineering specialities 

Aug 22, 2:19PM EDT0

Do you feel you have found a solution to our waste glass problems?

Aug 21, 7:50PM EDT0

No, actually I started. I got few false results. Now we are trying again with a calculation of a mix design

Aug 22, 1:20PM EDT0

What do engineers do on a day to day basis?

Aug 21, 6:58PM EDT0

Engineers are always trying to make the world beautiful. They always focus on design, calculation and cost management. it is their duty day to day 

Aug 22, 2:20PM EDT0

What is the difference between science and engineering?

Aug 21, 6:13PM EDT0

Generally, Science is the study of the physical world, while Engineering applies scientific knowledge to design processes, structures or equipment. Both Engineers and Scientists will have a strong knowledge of science, mathematics and technology, but Engineering students will learn to apply these principles to designing creative solutions to Engineering challenges.

Aug 22, 1:15PM EDT0

What do you get out of engineering that you couldn’t get from any other kind of work?

Aug 21, 4:43PM EDT0

I have to earn practical knowledge. I can explain what, why, how? These give me knowledge how to explain and implement science

Aug 22, 2:22PM EDT0
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