Stiffness Modulus and Fatigue Properties of Cement Stabilized Sand with Use of a Synthetic Modified-Zeolite Additive
Cement stabilized material, obtained by blending cement, water and soil or aggregate, forms a durable bonded material that can be attractive for pavement construction. However, cement stabilized material is brittle and sensitive to overloading. This study investigates the engineering properties of using a synthetic modified-zeolite additive in cement stabilized sand materials. The concept of applying a non-traditional additive into the cement stabilization may provide potential economic and environmental benefits for the road construction and maintenance. In this paper, stiffness and fatigue properties were evaluated on a variety of mix proportions by varying cement and additive contents. Stiffness and fatigue properties are two important parameters for pavement design. The higher stiffness of the cement stabilized base enables the loads to distribute over a wider area and hence considerably reduces stresses on the subgrade. Better fatigue resistance results in a higher ability to prevent cracks caused by accumulated traffic loads. In this study, a cyclic four-point bending test was conducted which simulates the cement stabilized base layer subjected to the repeated tensile strain and stress. Based on the test results, adding a certain amount of this additive in cement stabilized sand mixtures can enable the beam specimen to withstand higher strain at failure than the mixture without this additive. The fatigue relations are obtained for all the tested mixtures by plotting the load cycles to failure as a function of the applied stress or initial strain levels.
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Supplemental Notes:
- This paper was sponsored by TRB committee AFS80 Cementitious Stabilization.
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Corporate Authors:
500 Fifth Street, NW
Washington, DC United States 20001 -
Authors:
- Wu, Po-Han
- Houben, L J M
- Scarpas, A
- Egyed, C E G
- de La Roij, R
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Conference:
- Transportation Research Board 94th Annual Meeting
- Location: Washington DC, United States
- Date: 2015-1-11 to 2015-1-15
- Date: 2015
Language
- English
Media Info
- Media Type: Digital/other
- Features: Figures; Photos; References; Tables;
- Pagination: 12p
- Monograph Title: TRB 94th Annual Meeting Compendium of Papers
Subject/Index Terms
- TRT Terms: Cement; Mechanical fatigue; Pavement base course; Sand; Soil stabilization; Stiffness
- Uncontrolled Terms: Bending tests; Cement stabilized base; Zeolite
- Subject Areas: Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I40: Soils and Rocks;
Filing Info
- Accession Number: 01553743
- Record Type: Publication
- Report/Paper Numbers: 15-2880
- Files: TRIS, TRB, ATRI
- Created Date: Feb 21 2015 4:38PM