Details:

Creators:
Liu, Rui
Corporate Creators:
University of Colorado at Denver
Corporate Contributors:
United States. Federal Highway Administration
Subject/TRT Terms:
[+]
Admixtures Coarse Aggregates Compressive Strength Concrete Pavements Flexural Strength Freeze Thaw Durability Laboratory Tests Permeability Reclaimed Rubber Tires
Publication/ Report Number:
CDOT-2013-10
Resource Type:
Tech Report
Geographical Coverage:
Colorado
Corporate Publisher:
Colorado. Dept. of Transportation. Research Branch
NTL Classification:
NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance;NTL-HIGHWAY/ROAD TRANSPORTATION-Design;
Abstract:
The reuse potential of tire chips as coarse aggregates in pavement concrete was examined in this research by

investigating the effects of low- and high-volume tire chips on fresh and hardened concrete properties. One concrete

control mixture was designed, which well exceeds CDOT Class P concrete requirements. The coarse aggregate

component of the mixture was replaced in 100%, 50%, 30%, 20%, and 10% by volume using tire chips. The fresh

concrete properties, compressive strength, flexural strength, splitting strength, permeability, and freeze/thaw durability

were tested in the lab to evaluate the potential of including tire chips in concrete paving mixes. The testing results

indicate tire chips can be used to replace coarse aggregate in concrete pavement mixtures. Two mixtures with 10%

coarse aggregate replaced by tire chips had the best performance. The workability was comparable to the control

mixture, and the air content reached 6%. At 28 days of age, the average compressive strength of the two mixtures was

significantly less than the control but still exceeded CDOT’s specification of 4200 psi; the averaged flexural and

splitting tensile strengths were higher than 900 psi and 590 psi respectively. In addition, the two mixtures exhibited

moderate resistance to chloride-ion penetration at 28 days of age and high freeze/thaw durability. The rubberized

mixtures investigated in this study sustained a much higher deformation than the control mixture when subjected to

compressive, flexural, and splitting loadings.


Format:
PDF
Funding:
22.65
Collection(s):
US Transportation Collection
Main Document Checksum:
[+]
urn:sha256:dbd14cd42708b4873d7b15bcdd5011ebcf18357f179351089a5d4d5d83546685
Download URL:
https://rosap.ntl.bts.gov/view/dot/26266/dot_26266_DS1.pdf
File Type:

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