Details:

Creators:
Mohammad, Louay
Corporate Creators:
Louisiana Transportation Research Center
Subject/TRT Terms:
[+]
Asphalt Mixtures Asphalt Pavements Mechanical Properties Paving Segregation (Aggregates) Temperature Tensile Strength
Publication/ Report Number:
14-1B
Resource Type:
Brief
Geographical Coverage:
Louisiana
Corporate Publisher:
Louisiana Transportation Research Center
Abstract:
Material segregation in asphalt mixtures is a non-uniform distribution of coarse

and fine aggregates through its masses, i.e., concentration of coarse materials

in some area and fine materials in others. During construction, the coarse and

fine asphalt mixtures may cool at different rates, at different locations, causing

temperature segregation (or temperature differentials). Excessive temperature

differentials within a mat of uncompacted asphalt mixtures can cause variations

in the density levels of the finished pavements due to the inconsistent

compaction at different temperatures. A lack of density in the cooler areas of the

pavement can cause premature deterioration of those pavement areas such as

moisture damage, fatigue, cracking, rutting, raveling, pothole, etc. Therefore, it

is essential to ascertain the effects of temperature segregation on the quality of

asphalt mixtures as measured by their densification and mechanical properties

of asphalt mixtures in Louisiana in order to improve the initial quality and the

long term performance of its asphalt pavements. The pavement surface thermal

profile during construction will be measured using a paver-mounted infrared (IR)

bar known as PAVE-IR system commercially available from MOBA Corporation.

This profile will be used to ascertain the effect of temperature segregation on

the quality of asphalt mixtures as defined by measurements of density and

mechanistic properties.


Format:
PDF
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:d2a0f9d11e9ea6bf63fae52873cac4d57ebc7e244fa8c11cdaa9f5bf94919c2a
Download URL:
https://rosap.ntl.bts.gov/view/dot/28630/dot_28630_DS1.pdf
File Type:

Supporting Files

• No Additional Files

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