How to reduce early-age shrinkage in concrete pavement by using new technologies?

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Azdeen Najah

How to reduce early-age shrinkage in concrete pavement by using new technologies?

How to reduce early-age shrinkage in concrete pavement by using new

technologies?

PhD Candidate: Azdeen Najah

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Contents:

1. Introduction2. Limitations of the research study3. The aim of the research4. Literature Review 5. Research hypothesis 6. Data collection - Data collection methodology - Data collection groups - Data collection analysis - Dependent and independent

variablesHow to reduce early-age shrinkage in concrete pavement by using new technologies?

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Introduction:

The Shrinkage is volume decrease of concrete caused by drying and chemical changes, during and after pouring of concrete .


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Usually we can reduce the shrinkage cracks in concrete pavement by using some measures such as:

*Effective Curing*Movement Joints

*Reinforcement Wire mesh


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In this research we investagating and looking for other solutions and new technology by using concrete additives for reduce shrinkage cracks in concrete pavement.



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Limitations of the research study: Broad Topic: Concrete Design

Narrow Topic: Shrinkage in ConcreteFocused Topic: Early-age Shrinkage in Concrete PavementResearch Question: How to reduce early-age shrinkage in concrete pavement by using new technologies?


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The aim of the research:

The primary aim of this research study is the evaluation of new technologies that may help to reduce or completely eliminate the early-age shrinkage cracks in concrete pavements in all potential environments.

8How to reduce early-age shrinkage in concrete pavement by using new technologies?

Literature Review 1. Fenyvesi O, (2012).

Early age shrinkage cracking of concretes, Conference of Junior Researchers in Civil Engineering, 51-57.

2. Van CHANH N, (2011). Steel fiber reinforced concrete, 108-116.

3. Saeed A, (2006). Imran A B, Javed I S, Shahzad A Q, a study on properties of polypropylene fiber reinforced concrete, 31st Conference on OUR WORLD IN CONCRETE & STRUCTURES: 16 - 17 August 2006, Singapore, 01-10.

4. Yılmaztürka F., Kulur S., Pekmezcia B.Y., (2002). Measurement of shrinkage in concrete sample by using digital photogrammetric methods, 1-4.


Research hypothesis:(Experimental hypothesis) 1. prediction that the treatment by using

additives causes a positive effect.

2. prediction that the treatment by using additives doesn't cause an effect.

3. One treatment by using additives causes more positive effect than others, i.e. reduce shrinkage.


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Data Collection Methodologies:1. Documentary Analysis2. Experimentation3. correlation

Experimental Design :Post-Test Only Control Group

Experimental design requires;- Experimental Groups- Control Group


Environments

Control Group

Experimental Groups

Normal Steel Fiber

Polypropylene Steel Fiber +

Polypropylene

Natural N-n F-n P-n FP-nIn Oven N-o F-o P-o FP-oIn Water N-w F-w P-w FP-wTest Environments

Natural

In Water

In Oven

Steel Fiber

Polypropylene

Study Sample


Dependent and independent variables:Independent treatment variable:that to be applied to the experimental groups. “New additives samples"

Dependent variable:that to be applied and measured in all groups. “Shrinkage "


Data Analysis:Quantitative Data Analysis to be used.Quantitative analysis concentrates on simple way to describing, summarizing, and displaying numerical data.In this study we have to measure the Area of cracks for all control and Experimental groups.

Ac% = (Ac/As)*100

AcAs

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Conclusion


•The design concrete mixture materials percentages will be determined and used with same percentages for all control and experimental and will be changeable.

•There are no specific system used for measuring the shrinkage in concrete therefore, will depending on eye-observation to evaluate the amount of cracks. This observation might to be improved to measurement by using digital photogrammetric methods as it explained and detailed in paper No.4. •The Test environments normal environment, hot environment represented by oven and wet environment represented by water will be used as probabilities for all potential geographical and climate environments for all seasons and all countries world-wide, therefore, it is possible to choice the most better solution for each weather and season separately, this will be considered in future research study.

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End of Presentation !

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How to reduce early-age shrinkage in concrete pavement by using new technologies?

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