Stabilization of Dredged Materials Using Cement and a Pozzolanic Binder Mineral Additive

Abstract

In this study, it was aimed to stabilize the dredged materials with low bearing capacity, brought from Edirne, by using cement and pozzolanic binder mineral additives. In the first stage of the study, the geotechnical properties of the dredging materials were determined. Then, the optimum water contents and maximum dry unit weight values of the soil samples without additives and with different additive ratios were found by compaction tests. Pure and additive unconfined compressive samples were prepared with the optimum water contents obtained in the compaction tests. Samples were prepared by adding 8%, 10% and 12% cement and 2% pozzolanic binder additive by weight to the dredged materials. Unconfined compressive tests were performed on the samples at the end of instant, 1-day, 7-day and 28-day curing periods. In addition, soaked CBR, permeability and flexural tests were performed on 12% cement+pozzolanic added samples. As a result of the experiments, with the addition of cement and pozzolanic binder additives in different ratio to the dredged materials, permeability decreased, unconfined compressive strength, soaked CBR values and flexural strength increased significantly.

Keywords

• California Bearing Ratio (Soaked CBR)
• Cement Stabilization
• Pozzolanic Binder Mineral Additive
• Soil Stabilization
• Unconfined Compressive Strength

References

1. [1] Hoff J., Kolff A.N., 2012. Hydraulic Fill Manual: For Dredging and Reclamation Works, CRC Press, Boca Raton.
2. [2] T.R. Official Gazette, Sea and Inland Waters Dredging Regulation, 09.08.2016, Number:29796, Prime Ministry Printing House, Ankara.
3. [3] URL-1: http:// www.european-dredging.eu, (Visit date: 20 March 2021).
4. [4] Yemenici B., Coruk Ö., 2018. Novocrete® Technology And Applications In Soil Stabilization With Cement, 71st Geological Congress of Turkey, 23-27 April, pp.287-288.
5. [5] Coruk Ö., Kavak A., Aydıner A., 2018. NovoCrete® Applications in Soil Improvement in Railways, Railway Engineering Journal, 6, 73-78.
6. [6] URL-2: http://www.jags.com.tr, (Visit date: 10 March 2021)
7. [7] Yemenici B., Coruk Ö., 2017. Novocrete® Technology And Applications in Stabilization of In-Situ Soils, International Engineering Geological and Geotechnical Symposium, Adana, 12-14 October 2017, pp.239-244.
8. [8] Kavak A., Coruk Ö., Aydıner A., A New Binder Mineral for Cement Stabilized Road Pavement Soils, Sixth International Conference On Advances in Civil, Structural and Mechanical Engineering, Bangkok, Tayland, 25-26 Şubat 2017, pp.68-71.

9. [9] TS EN 197-1 Cement Part 1: Compositions and Conformity Criteria for Common Cements, Turkish Standards Institution, (2002).
10. [10] TS 1500 Classification of Soil for Civil Engineering Purposes, Turkish Standards Institution, (2000).
11. [11] TS 1900-1 Methods of Testing Soils for Civil Engineering Purposes in the Laboratory Part 1: Determination of Physical Properties, Turkish Standards Institution, (2006).
12. [12] TS 1900-2 Methods of Testing Soils for Civil Engineering Purposes in the Laboratory Part 2: Determination of Mechanical Properties, Turkish Standards Institution, (2006).
13. [13] ASTM D422-63 (2007) e2, Standard Test Method for Particle Size Analysis of Soils, ASTM International, West Conshohocken, PA, 2007, www.astm.org.
14. [14] ASTM D698-12e1, Standard Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort, ASTM International, West Conshohocken, PA, 2012, www.astm.org.
15. [15] ASTM D1635/D1635M-19, Standard Test Method for Flexural Strength of Soil-Cement Using Simple Beam with Third-Point Loading, ASTM International, West Conshohocken, PA, 2019, www.astm.org.
16. [16] ASTM D1883-14, Standard Test Method for California Bearing Ratio (CBR) of Laboratory Compacted Soils, ASTM International, West Conshohocken, PA, 2014, www.astm.org.
17. [17] ASTM D2166/ D2166M-16, Standard Test Method for Unconfined Compressive Strength of Cohesive Soil, ASTM International, West Conshohocken, PA, 2016, www.astm.org.
18. [18] ASTM D2487-11, Standard Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System), ASTM International, West Conshohocken, PA, 2011, www.astm.org.
19. [19] ASTM D2974-20e1, Standard Test Methods for Determining the Water (Moisture) Content, Ash Content, and Organic Material of Peat and Other Organic Soils, ASTM International, West Conshohocken, PA, 2020, www.astm.org.
20. [20] ASTM D4318-17e1, Standard Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index of Soils, ASTM International, West Conshohocken, PA, 2017, www.astm.org.
21. [21] TS EN 1744-1+A1 Tests for Chemical Properties of Aggregates Part 1: Chemical Analysis, Turkish Standards Institution, (2013).
22. [22] Highways Technical Specification, General Directorate of Highways, (2013).
23. [23] Terzaghi K., and Peck R.B., (1967). Soil Mechanics in Engineering Practice, Second Edition, John Wiley, New York.