Design Mixes For Asphalt Using 1Inch And 1/2 Inch Steel Slag

Project and Seminar Material for Civil and Environmental Engineering

Design Mixes For Asphalt Using 1Inch And 1/2 Inch Steel Slag


Abstract


Asphalt concrete can be produced and the pavement constructed readily in Oregon when crushed steel slag is used as a portion of the aggregate. If the unit cost of steel slag modified mixes is the same as conventional dense graded mixes, overall project costs may increase because of the decrease in coverage by the heavier steel slag mix. For the test section hot mix asphalt concrete (HMAC) constructed with 30% steel slag, the coverage was 15% less than a conventional “B” mix. Reported increased resistance to rutting and improved skid resistance was not measured during the five years the pavements have been monitored. The differences between the two sections may not be measurable because only 30% steel slag with dimension of 1-inch (25.4 mm) … 1/2-inch (12.7 mm) was used in the test mix and the slag was finer than the conventional ½ – ¼” (12.7 to 6.3 mm) material it replaced. To date, both the control and test sections are performing satisfactorily.


Chapter One


1.0 Introduction

1.1 Background Of The Study

In September 1994, steel slag test and control sections were constructed in Oregon to evaluate the use of steel slag in hot mix asphalt concrete (HMAC). Steel slag, a by-product of the steel- making process, is readily available in the Portland Metropolitan area. If unused, the slag material could end up in landfills, costing Oregon taxpayers money as disposal facilities reach capacity and new landfills are required. One way to utilize the steel slag is to incorporate it into hot mix asphalt concrete (HMAC). This process has been used successfully in the midwest and eastern United States with reported improved pavement performance (Ramirez 1992). Prior to this study, Oregon had no experience in handling, testing, or constructing steel slag pavements.


1.2 Objectives Of The Project

The primary objective of this study is to evaluate the use of steel slag in hot mix asphalt concrete. All aspects of using this material in a pavement will be evaluated, including:

  1. Steel slag sampling methods and laboratory tests,
  2. Asphalt concrete mix design and testing,
  3. Constructability, and
  4. Performance characteristics.

Other objectives include determining appropriate revisions to mix design procedures for the addition of steel slag.


1.3 Scope And Significance Of Work

Steel slag has been used to construct pavements for nearly one hundred years. Since it was discovered that the residue from the manufacture of steel could be crushed and processed into a product that looked like crushed rock, other testing was performed to determine the usefulness of this “waste” product.

It was discovered that the highly angular, rough textured, vesicular, pitted surfaces provide the particle interlock, and if properly compacted, the high stability required for good serviceable pavements. The slag is usually added as part of the coarse aggregate fraction of the mixture at a percentage of 20% to 100%, depending on the application of the mixture.

Addition of steel slag may enhance the performance characteristics of the pavement. Since the slag is rough, the material improves the skid resistance of the pavement. Also, because of the high specific gravity and angular, interlocking features of the crushed steel slag, the resulting HMAC is more stable and resistant to rutting (Ramirez 1992, Noureldin and McDaniel 1990, Lemass 1992).

Currently there are two steel mills producing steel slag in Oregon, both in the Portland area: Cascade and Oregon Steel. Cascade currently produces about 60,000 to 70,000 tons/year (54,000 to 63,000 Mg/year) of steel slag. Oregon Steel produces about 100,000 tons/year (90,000 Mg), and currently has about 300,000 tons (270,000 Mg) on hand. This slag would normally be placed in a landfill if it was not crushed and used for construction material.


1.4 Benefits Of The Project

Steel slag may be an appropriate addition to asphalt concrete. The current specifications do not exclude the use of steel slag. The overall benefit of the research will be an understanding of the properties of steel slag hot mix asphalt concrete and the applicability to future projects.

Typical aggregate used for HMAC in the Portland area includes crushed gravel. Pavements with the crushed gravel are typically not as stable as mixes without gravel and are often susceptible to rutting. The addition of steel slag may provide a viable alternative to the crushed gravel, as it reportedly increases the stability of the mix materials, thus reducing the rutting potential.

If steel slag used as an aggregate is determined to be an appropriate addition with benefits to asphalt concrete, then additional HMAC pavements may be constructed with steel slag. The agency may also encourage the use of steel slag in some pavements by providing incentives.

Other benefits of using steel slag in asphalt concrete include the recycling of a waste product, thus reducing the volume of material placed in Oregon landfills.


1.5 Project Organisation

The work is organized as follows: chapter one discuses the introductory part of the work, chapter two presents the literature review of the study, chapter three describes the methods applied, chapter four discusses the results of the work, chapter five summarizes the research outcomes and the recommendations.


Design Mixes For Asphalt Using 1Inch And 1/2 Inch Steel Slag


Project Material Download

3,000 Naira


The complete material will be sent to you in just 2 steps.

Quick & Simple…


Step One Purchase

Make payment of ₦3,000: through USSD Transfer, Bank Mobile App, ATM Transfer, or POS Transfer to:

Access Bank PlcAccount No.: 0811003731
Name: Samphina Academy
Account Type: Current

Or Click Here to pay with Debit Card

FOR CLIENTS OUTSIDE NIGERIA:
Click Here to pay with Debit Card ($15)
GHANA – Make Payment of 60 GHS to MTN MoMo, 0553978005, Douglas Osabutey 

  PAY WITH CRYPTOCURRENCY


Step Two Purchase

Send the following details through Text Message or WhatsApp Messenger | +234-8143831497

  • Payment Details 
  • Email Address 
  • Design Mixes For Asphalt Using 1Inch And 1/2 Inch Steel Slag

The complete material will be sent to your email address after receiving your payment information | T & C Apply


  Contact Our Help Desk


You may also like:

⚠️ Need a different topic? Perform a quick search



Get A Complete Business Plan For Any Business In Nigeria

Business Plan for Businesses in Nigeria

  Business Plans in Nigeria


Design Mixes For Asphalt Using 1Inch And 1/2 Inch Steel Slag


Disclaimer

This research material “Design Mixes For Asphalt Using 1Inch And 1/2 Inch Steel Slag” is for research purposes and should be used as a guide in developing your research project / seminar work. For no reason should you copy word for word (verbatim) as samphina.com.ng will not be liable for any who copied the material.

The aim of providing this material is to reduce the stress of moving from one school library to another all in the name of searching for research materials. This service is legal because, all institutions permit their students to read previous projects, books, articles or papers while developing their own works. According to Austin Kleon “All creative work builds on what came before”.

samphina.com.ng is only providing this material “Design Mixes For Asphalt Using 1Inch And 1/2 Inch Steel Slag” as a reference for your research. The paper should be used as a guide or framework for your own paper. The contents of this paper should be able to help you in generating new ideas and thoughts for your own research. Use it as a guidance purpose only.


How to defend your research work


This is a general guide on how to defend your research work:

1. Prepare For Questions:

If you are preparing for questions that may be asked during your defense, then your answers will flow smoothly and effectively. This will prove your knowledge on the subject e.g “Design Mixes For Asphalt Using 1Inch And 1/2 Inch Steel Slag“, and strengthening your argument. Ask friends and family, read your work for them to listen to your presentation, and write down questions. You may be lucky the panel will ask you those you have already prepared on.

2. Strong Summary:

Summarizing your chapters will help keep your audience focused because it is easy for a mind to drift, so providing summaries will ensure your panel will follow along, even if they lose focus for a brief moment. Visual aides, such as graphs and power-point presentations can be very helpful. If you are going to use these, make sure you will practice your presentation with them.

3. Be Confident in Your Research Work:

Not knowing your topic “Design Mixes For Asphalt Using 1Inch And 1/2 Inch Steel Slag” inside out will cause you to struggle and ultimately fail with your defense. You need to know the subject from every angle to ensure you are fully prepared for any question that may come your way.

4. Conclusion:

Reinforce your findings to conclude your defense. The finale of your presentation should focus on proving the work that has been done. You may need to recap on what has changed and remained unchanged, if is necessary.

5 . Listen:

Before you get defensive or recite a particular answer, make sure you truly understand the question being asked. Being a good listener is an important quality, because providing an inaccurate or off-topic answer will also weaken the validity of your paper.

Samphina Academy

Samphina Academy is an Online Educational Resource Center that is aimed at providing students with quality information and materials to aid them in succeeding in their academic pursuit.