Bitumen Emulsion: For Road Construction and Road Maintenance Application A New Approach

BITUMEN EMULSION: For Road Construction and Road Maintenance Application A new approach

Prepared by Eng. Habtamu Sedie

History of Asphalt Emulsion Virtually all roadway requirement can be met with emulsions. Judicious selection and use can yield significant economic and environmental benefits. -Surface treatment -Asphalt recycling -Prime coats -Tack coats -Maintenance patching -Crack filling and others

Factors contributed to interest in the use of Asphalt Emulsion • - Energy saving • - Little or no hydrocarbon emissions • - ability of certain types of emulsions to coat damp aggregate surfaces – fuel saving for heating and drying aggregate • - The ability to use the cold materials at remote sites • Applicability for us in preventive maintenance

Substitution of Emulsion with cut back asphalts • We strongly suggest this to be considered not by making a mandatory action but to allow emulsions as substitution of Cut Back- Asphalt in some construction cases.

Why substitution? - Asphalt emulsion technology has been innovative in meeting the challenges of increased traffic, shrinking budget and environmental concerns. (for developed world) -For us 1. Import substitution by producing the emulsion in Ethiopia 2. Dollar savings made by decreasing cutback Asphalt import 3. Make road repair system available all

Import Substitution

Bitumen type/ Imported year

2013 (CIF Value)

2014 (CIF Value)

2015 (CIF Value)

2016 (CIF Value)

Petroleum Bitumen

2,206,516.90

1,100,762.28

3,930,014.54

7,471,240.40

7,454,271.81

Cut- backs

8,981,829.62

21,045,845.99

15,245,371.68

24,787,382.33

10,621,278.48

Import Substitution

2017 (CIF Value)

Table 1. Import data of petroleum bitumen and cut-backs for ERCA from 2013December 2017)

BITUMEN EMULSION: Technical features Applications

Production

BITUMEN EMULSION: MANUFACTURING PROCESS

MECHANICAL Energy (Colloidal Mill)

CHEMICAL Energy (Emulsifiers)

EMULSION

BITUMEN EMULSION: MANUFACTURING PROCESS

COLLOIDAL MILL

EMULSION

BITUMEN EMULSION: MANUFACTURING PROCESS BITUMEN PHASE

WATER PHASE

COLLOIDAL MILL

BITUMEN EMULSION: COMPLETE FACTORY

EMULSION SILOS WATER TANK EMULSION PLANT

HEATER

BITUMEN TANK

MASSENZA BITUMEN EMULSION PLANTS

EMULSION PLANT

# 400 !!!

Emulsion for Road Maintenance The menace and inconvenience of potholes on Ethiopian roads will be a thing of the past, following the introduction of a new machine that can fill potholes in ten minutes.

Automated Spray Pothole patching truck STRASSMAYR STP 1008

The Technology

Spray Injection Patching It involves four basic steps:

1. Cleaning

Strassmayr Blow-Patching technology[via torchbrowser.com].mp4

2. Emulsion spraying

Strassmayr Blow-Patching technology[via torchbrowser.com]_1.mp4

3. Application of Emulsion and Aggregate Mix

Strassmayr Blow-Patching technology[via torchbrowser.com]_2.mp4

4. Application smaller size aggregate

Benefits Simplicity -the entire repair job can take just one

minute from start to finish – making it up to four times faster than traditional methods -Unlike other methods, spray patching truly is a successful one-man show. -no equipment with which to hassle, translating into time saved from unloading and loading at the site of each new pothole

Material Savings spray patch material is mixed just before it’s sprayed down, the process produces minimal waste. At the end of the day, there’s no concern of wasted mix. Therefore, though the initial material costs remain the same, eliminating any chance of wasted material significantly reduces operating costs

References Best practice manual for thin bituminous surfacing 2013 for Ethiopia Roads How Spray Patching Equipment for Pothole Repair Can Improve Your ROI, OCTOBER 17, 2011 https://www.standardmedia.co.ke/business/article/2 000039165/it-s-goodbye-to-potholes-as-jetpatcher-deb uts-in-kenya STRASSMAYR STP 1008, patcher truck technology and application Office of Road Fund – Ethiopia Ethiopian Reporter article “ Addis Ababa City of Potholes” Ethiopian Revenue and Customs Authority (ERCA

)

Thank you