Development of design guidelines for proper selection of graded aggregate base in Maryland state highways.

Aydilek, Ahmet H.; Haider, Intikhab; Cetin, Altan; Kaya, Zulkuf; Hatipoglu, Mustafa; University of Maryland (College Park, Md.)

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Development of design guidelines for proper selection of graded aggregate base in Maryland state highways.

2015-01-01
By Aydilek, Ahmet H. ; Haider, Intikhab ; Cetin, Altan ; ...

[PDF-1.28 MB]

English

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Details:

Creators:

Aydilek, Ahmet H. ; Haider, Intikhab ; Cetin, Altan ; Kaya, Zulkuf ; Hatipoglu, Mustafa

Aydilek, Ahmet H. ; Haider, Intikhab ; Cetin, Altan ; Kaya, Zulkuf ; Hatipoglu, Mustafa Less -
Corporate Creators:

University of Maryland (College Park, Md.)
Subject/TRT Terms:

[+]

Aggregate Gradation Base Course (Pavements) Deformation Drainage Field Tests Laboratory Tests Mechanistic-empirical Pavement Design Modulus Of Resilience Moisture Content Stiffness
Publication/ Report Number:

MD-15-SP109B4G-1
Resource Type:

Tech Report
Geographical Coverage:

Maryland
Corporate Publisher:

Maryland. State Highway Administration. Office of Policy & Research
Abstract:

The mechanical and drainage properties of graded aggregate base material are the level one input in mechanistic

pavement design. Maryland State Highway Administration (SHA) is in need of guidelines for evaluation of stiffness

and drainage characteristics of graded aggregate base (GAB) stone delivered at highly variable gradations to the

construction sites. To fulfill the current need, the mechanical and drainage properties of several Maryland GAB

materials were evaluated in the laboratory and field. The resilient modulus and hydraulic conductivity test results

obtained in the laboratory were compared to the field moduli and hydraulic conductivity. The effect of moisture

content on resilient modulus was also evaluated. Summary resilient modulus, SMR values at Optimum Moisture

Content (OMC) minus 2% were higher than those at OMC, with few exceptions; however, the permanent

deformations increased with moisture beyond OMC. The control of moisture content within 2% of OMC would not

significantly affect the resilient modulus and permanent deformation in construction. It was also concluded that an

addition of 4-6% fines over the SHA specification limit of 8% resulted in 2-5 times decrease in the laboratory-based

GAB hydraulic conductivities and an increase in time for 50% completion of the drainage from the highway base.

The required base thickness increased 2.6 to 7 times as a result of fines increased from 2 to 14% for selected GAB

materials evaluated. It is recommended that resilient modulus, permanent deformation, as well as hydraulic

conductivity of GAB materials, are evaluated for designing a highway base with adequate stiffness and drainage

performance
Format:

PDF
Funding:

SP109B4G
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:c10625a805d950f4617f9f2dd6f967fbbc493082f8fdb590f769b5987ab73eaf
Download URL:

https://rosap.ntl.bts.gov/view/dot/28445/dot_28445_DS1.pdf
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Development of design guidelines for proper selection of graded aggregate base in Maryland state highways.

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