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K. Pandey*, M. Zaman+ and J.G. Laguros+

*Reed Engineering, Dallas, Texas, United States of America
+University of Oklahoma, Norman, Oklahoma, United States of America

doi:10.4203/ccp.56.11.4

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K. Pandey, M. Zaman, J.G. Laguros, "Interaction of Stabilized Aggregate Base/Subbase with Subgrades", in B.H.V. Topping, (Editor), "Advances in Civil and Structural Engineering Computing for Practice", Civil-Comp Press, Edinburgh, UK, pp 409-417, 1998. doi:10.4203/ccp.56.11.4

Abstract

The stresses induced by heavy traffic loads require not only modified subgrades, but also aggregate base courses which have been improved through stabilization. In this study a limestone aggregate called Meridian, stabilized with Class C fly ash, has attained acceptable values of resilient modulus. The increase in strength depends on amount of stabilizing agent used and curing period. The increases are also attested by changes in the fabric of the aggregate as evidenced by X-ray diffraction and scanning electron microscopy. Using the resilient modulus data, the material model parameters, k_1,k_2 and theta are first evaluated; then, the layer coefficients, a_2, of the AASHTO design method are calculated which are indicative of the interaction of the subgrade with the base, and can be utilized in the design of flexible pavements.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 56 ADVANCES IN CIVIL AND STRUCTURAL ENGINEERING COMPUTING FOR PRACTICE Edited by: B.H.V. Topping Paper XI.4 Interaction of Stabilized Aggregate Base/Subbase with Subgrades K. Pandey, M. Zaman+ and J.G. Laguros+ Reed Engineering, Dallas, Texas, United States of America +University of Oklahoma, Norman, Oklahoma, United States of America doi:10.4203/ccp.56.11.4 purchase the full-text of this paper Full Bibliographic Reference for this paper K. Pandey, M. Zaman, J.G. Laguros, "Interaction of Stabilized Aggregate Base/Subbase with Subgrades", in B.H.V. Topping, (Editor), "Advances in Civil and Structural Engineering Computing for Practice", Civil-Comp Press, Edinburgh, UK, pp 409-417, 1998. doi:10.4203/ccp.56.11.4 Abstract The stresses induced by heavy traffic loads require not only modified subgrades, but also aggregate base courses which have been improved through stabilization. In this study a limestone aggregate called Meridian, stabilized with Class C fly ash, has attained acceptable values of resilient modulus. The increase in strength depends on amount of stabilizing agent used and curing period. The increases are also attested by changes in the fabric of the aggregate as evidenced by X-ray diffraction and scanning electron microscopy. Using the resilient modulus data, the material model parameters, k_1,k_2 and theta are first evaluated; then, the layer coefficients, a_2, of the AASHTO design method are calculated which are indicative of the interaction of the subgrade with the base, and can be utilized in the design of flexible pavements. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £95 +P&P)
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