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Evaluation of materials to reduce pavement cracking

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Abstract

The materials characterization for a new procedure to reduce pavement cracking was presented. The viscoelastic properties of several mixes were determined to ascertain optimum bitumen content and composition of aggregates.

Résumé

On rend compte des tentatives couronnées de succès faites pour obtenir des mélanges à fort allongement et à faible teneur en air utilisables en membranes minces comme matériaux intercalaires dans les revêtements de routes. L'emploi de ce matériau entre la couche d'usure et le support d'un revêtement flexible devrait contribuer à atténuer l'effet des contraintes thermiques, à entraver la fissuration déterminée par la fondation et à dimineur la migration d'eau. Le mélange final était composé de parties approximativement égales de lambeaux de pneus triturés, de sable et de bitume. On donne la relation de base et les études statistiques relatives aux essais de traction paramétriques du nouveau compsite. On a déjà montré que l'application de ce matériau contribuerait simultanément à rendre moins préoccupant de probème des déchets solides que posent les pneus au rebut et à améliorer le bon état structural des revêtements flexibles.

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Abbreviations

A,B,C, :

Constants numeric

a m :

Air voids based on SG m percent

a w :

Air voids based on SG w percent

b w :

Bitumen content in total mix on a volume baiss percent

b w :

Bitumen content in total mix on a weight basis percent

CEM :

Constant strain modulus ksi

CERM :

Constant strain rate modulus ksi

COC :

Coefficient of correlation percent

CSC :

Constant stress compliance ksi−1

CSRC :

Constant stress rate compliance ksi−1

E :

Ultimate uniaxial strain percent

E o :

Magnitude of constant strain in./in

FAD :

Field Average Deviation percent

N :

Number of specimens numeric

Q :

Stress rate psi/min

R :

Strain rate percent/min

R s :

Ratio of percent passing of maximum size rubber divided by optimum numeric

S :

Ultimate uniaxial stress psi

SEC :

Ultimate secant modulus ksi

SG m :

Experimental specific gravity from measurements and weights in air numeric

SG t :

Theoretical specific gravity numeric

SG w :

Experimental specific gravity from weights in air and in water numeric

S o :

Magnitude of constant stress psi

STV :

Studentt test value numeric

T :

Time min

TAN :

Initial tangent modulus ksi

V :

Total volume of mix cu.ft

w i :

Constituent weight lb

PREFIX:

A-Average; D-Deviation; M-Mean

References

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Authors
  1. D. Bynum Jr
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  2. H. O. Fleisher
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  3. J. F. Evertson
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  4. D. R. Ray
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Additional information

Ph.D., P. E., member of the Graduate Faculty and Assistant Research Engineer in the Texas Engineering Experiment Station in the College of Engineering at Texas A. & M. University at the time of this work, and now Manager of the Research and Development Department at The Offshore Company, P.O. Box 2765, Houston, Texas, 77001.

MSIE, BSIE, Engineering Research Assistant in TEES at TAMU at the time of this work, and now Research Engineer in the R&D Dept. at The Offshore Co.

BSME, Engineering Research Associate in TEES at TAMU at the time of this work, and now Research Assistant at North Texas University in Denton, Texas.

MSCE, BSCE, Engineering Research Associate in TEES at TAMU at the time of this work, and now Research Engineer in the R & D Dept. at The Offshore Co.

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Bynum, D., Fleisher, H.O., Evertson, J.F. et al. Evaluation of materials to reduce pavement cracking. Mat. Constr. 7, 119–125 (1974). https://doi.org/10.1007/BF02473909

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