Evaluasi Sifat-Sifat Mekanik Campuran CTRB yang Disubstitusi Parsial dengan Pozolan Alam (Tras)
DOI:
https://doi.org/10.5614/jts.2014.21.3.6Keywords:
CTRB, Kuat tekan, CBR, RAP, RAM, Tras.Abstract
Abstrak. Penggunaan material RAP dan RAM yang distabilisasi dengan semen untuk diaplikasikan sebagai lapis pondasi perkerasan jalan, dikenal dengan campuran Cement Treated Recycling Base (CTRB) adalah metode yang penggunaannya sudah cukup kembang di Indonesiai. Teknik ini, telah diaplikasikan pada beberapa proyek konstruksi dan rehabilitasi jalan. Penggunaan material daur ulang dalam campuran perkerasan jalan, disamping dapat menghemat biaya konstruksi juga dapat mengurangi pengaruh buruk terhadap lingkungan. Disamping itu, substitusi material pozolan dalam campuran semen dapat meningkatkan kepadatan campuran yang pada akhirnya berpengaruh positif pada karakteristik mekanik dari campuran. Dalam penelitian ini, Unconfined Compressive Strength Test (UCS) atau pengujian kuat tekan dan California Bearing Ratio (CBR) dilakukan untuk melihat pengaruh substitusi parsial tras (pozolan alam) terhadap semen pada sifat-sifat makanik campuran CTRB dalam hal ini kuat tekan dan daya dukung campuran. Berdasarkan data hasil pengujian, sekalipun kekuatan campuran (qu) menurun pada awal umur campuran karena adanya substitusi tras terhadap semen, tetapi seiring dengan bertambahnya waktu, kekuatan campuran berangsur-angsur meningkat bahkan melampaui kekuatan campuran yang distabilisasi dengan semen saja, yaitu pada substitusi 15% tras terhadap 6% semen untuk kedua campuran CTRB, yaitu campuran yang mengandung 40% RAP : 60% RAM dan yang mengandung 60% RAP : 40% RAM. Adapun daya dukung (CBR) yang dicapai setelah substitusi tras terhadap semen adalah melampaui 100% untuk kedua campuran tersebut.Abstract. The use of stabilized Reclaimed Asphalt Pavement (RAP) and Recycled Asphalt Materials (RAM) as pavement structural base layer, recognized as Cement Treated Recycling Base (CTRB) material in Indonesia, is a very well established practice in the field. This technique has been applied in the field in some pavement major rehabilitation and reconstruction projects successfully. The use of recyclable materials in pavement applications is not only environmentally friendly, but also can reduce the cost of materials in a particular project. In addition, the use of pozzolan in cement-stabilized material may increase the density of the pavement layer to benefit the properties of the stabilized material. In this research study, Unconfined Compressive Strength (UCS) Test and California Bearing Ratio (CBR) serve as surrogate indicators of compressive strength and bearing capacity of pavement base layers to the density of the CTRB materials from the influence of partial cement replacement. From the research results, although the early strength gain is decrease but the ultimate compressive strength of the CTRB materials with partial cement replacement increases with the increase in the curing period of the samples, exceeding that of the samples without cement replacement. The results are very convincing in the mixtures of 15% cement replacement with natural pozzolan with the 6% cement contents for two CTRB mixtures in 40% RAP - 60% RAM and 60% RAP - 40% RAM mixture combinations. The bearing capacity from the CBR tests indicated that the CBR values were more than 100% for this two CTRB mixtures.
References
AASHTO, 1972, AASHTO Interim Guide for Design of Pavement Structure, American Association of State Highway Officials. Subcomittee on Roadway Design.
AASHTO, 2004, Standard Specification for Classification of Soil and Soil Aggregate Mixtures for Highway Construction Purpose, AASHTO Designation: M 145-91.
ACI, 2001, Use of Raw or Processed Natural Pozzolans in Concrete, Committee 232. 1R-00 Report.
ASTM, 1993, Standart Specification for Fly Ash and Raw or Calcined Natural Pozolan for Use as a Mineral Admixtures in Portland Cement Concrete, ASTM C 618-93.
ASTM C 311-96a, Standard test Method for Sampling and Testing Fly Ash or Natural Pozzolans for Use as Mineral Admixture in Portland Cement Concrete.
ASTM, 2008, Practice for Classification of Soils for Engineering Purposes, (Unified Soil Classification System) ASTM D 2487-06Z1.
Bang, S., Kraft, P., Leibrock, C., Lein, W., Roberts, L., Sebaaly, P., Johnston D., and Huft, D., 2012, Quality Base Material Produced Using Full Depth Reclamation on Existing Asphalt Pavement
Structure, Task 5: Development of Standardized Laboratory Testing Method FHWA -HIF.i
Baugh, J.S. and Edil, T.B., 2008, Suitability of Cement Kiln Dust for Reconstruction of Road, Final Report to Postland Cement Association, Department of Civil and Environmental Engineering,
University of Visconsin-Madison, madison, WI,50.
Bentur, A., 2002, Cementitious Material-Nine Milenia and A New Century: Past, Present and Future, Journal of Materials in Civil Engineering ASCE, Vol. 14, No.1, pp. 2-22.
Bina Marga, 2006, Spesifikasi Khusus Cement Treated Recycling Base and Sub Base untuk Campuran yang Dicampur Langsung di Tempat.
Brown, A.V., 2006, Cement Stabilization of Aggregate Base Material Blended With Reclaimed Asphalt Pavement, Thesis in Master of Civil Engineering, Birmingham Young University, USA: Department of Civil and Environmental Engineering, BSN (Badan Standarisasi Nasional), Pengujian Ketahanan Agregat Terhadap Keausan Dengan Mesin Abrasi Los Angeles, SNI 03-2417-2008.
BSN (Badan Standarisasi Nasional), Pengujian Berat Jenis Agregat, SNI 03-1969-2008.
BSN (Badan Standarisasi Nasional), Pengujian Penyerapan Agregat, SNI 03-1970-2008.
BSN (Badan Standarisasi Nasional), Pengujian Kuat Tekan Beton, SNI 03-1964-2008.
BSN (Badan Standarisasi Nasional), Pengujian Analisa Saringan Agregat Halus dan Kasar, SNI 03-1968-1990.
BSN (Badan Standarisasi Nasional), Pengujian Batas-Batas Atterberg, SNI 03-1967-1990.
BSN (Badan Standarisasi Nasional). "Pengujian Kepadatan Campuran" . SNI 03-1742-1989.
BSN (Badan Standarisasi Nasional), Pengujian CBR, SNI 03-1744-1989.
Camacho, R.E. and Afif, U.R., 2002, Importance of using The Natural Pozzolans on Concrete Durability. Cement and Concrete Research, Vol. 32, pp. 1851-1858.
Chappat, M. and Bilal, J., 2003, The Environmental Road of the Future: Life Cycle Cost Analysis, Energy Consumption and Greenhouse Gas Emission, Report of Colas Group, Franch.
Deniz, D., Tutumluer, E., Popovics, J.S., 2009, Expansive Characteristics of Reclaimed Asphalt Pavement (RAP) Used as Base Materials.
Illionis Center for Transportation, Civil Engineering Studies, Research Report ICT-09-055.
Fwa, T.F., 2010, Challenges In Environmentally Sustainable Pavement Recycling, Semarang, Indonesia: Paper Presented at The Seventh Asia Pacific Conference on Transportation and the Environment, 3-5 June.
Gabr, A.R. and Cameron, D.A., 2012, Properties of Recycled Concrete Aggregate for Unbound Pavement Construction, Journal of Materials in Civil Engineering. Vol. 24, No. 6, ASCE pp. 754-764.
Goonam, T.G. and Wilbrun, D.R., 1998, Aggregate from Natural and Recycled Sources: Economic Assessment for Construction Application-A Material Flow Analysis. U.S Geological Survey Circular, 1176.
Guthrie, W.S., Sebasta, S., and Scullion, T., 2002, Selecting Optimum Cement Content for Stabilizing Aggrrgate Base Materials, FHWA/TX-05/Technical Report 7-4920-2.
Guthrie, W.S., Roper, M.B., and Eggett, D.L., 2007, Evaluation of Laboratory Durability Tests for Stabillized Aggregate Base Materials, Transportation Research Board 87th Annual Meeting, Portland Cement Association, PCA R&D Serial No. 3045.
Halsted, G.E.P.E., 2007, Long-Term Performance of Full-Depth Reclamation with Portland Cement: Research Synopsis, Portland Cement Association.
Indrawati, V. and Manaf, A., 2011, Multiphases Hydration of the Actifated Binary Blend Portland Cement-trass, Proc. of The 3rd International Conference of EACEF (European Asian Civil Engineering Forum) Univ. Atma Jaya Yogyakarta,Indonesia, September.
Jongpradist, P., Jumlongrach, N., Youwai, S. and S. Chucheepsakul, 2010, Influence of Fly Ash on Unconfined Compressive Strength of Cement at High Water Content, Journal of Materials in Civil Engeneering, Vol. 22, No.1, ASCE, pp 49-58.
Kim, W and J.F. Lobuz, 2007, Resilient Modulus and Strengthof Base Course with Recycled Bitumenous, Minnesota Department of Transportation, Report No. MN/RC-2007-05, Jan. Li, X., Marasteanu, M.O., and Willliams, R.C., 2008, Effect of Reclaimed Asphalt Pavement (Proportion and Type) and Binder Grade on Asphalt Mixtures, TRB: Journal of Transportation Research Board, No. 2051, Washington,
D.C: TRB of the National Academies, pp. 90-97.
Miller, H.J., Guthrie, W.S., Crane, R.A., and Smith, B., 2007, Evaluation of Cement Stabilized Full-Depth-Recycling Base Materials for Frost and Early Traffic Condition, Federal Highway
Administration and Recycled Material Resource center at the University of New Hampshire, Durham, New Hampshire.
Mindess, S. and J.F. Young, 1981, Concrete, Prentice-Hall, Inc. EngleWood Cliffs, N.J. 07632 Monkman, S. and Shao, Y., 2006, Assessing the Carbonation Behavior of Cementitious Materials, Journal of Material in Civil Engineering, ASCE, Vol. 18, No. 6, pp. 768-776.
Nantung, T., Ji, Y., Shields, T., 2011, Pavement Structural Evaluation and Design of Full- Depth Reclamation (FDR) Pavement, Submitted for Presentation and Possible Publication in The 90th
Transportation Research Board Annual meeting, January.
Paya, J., Monzo, J., Borrachero, M.V., Peris, E and Gonzales-Lopez, E., 1997, Mechanical Treatments of Fly Ashes. Part III: Studies on Strength Development of Ground Fly Ashes (GFA)-Cement Mortars, Cement and Concrete Research. Vol 27. No 9, pp1365-1377.
Puppala, A.J., Hoyos, L.R. and Potturi, A.K., 2011, Resilient Moduli Response of Moderately Cement-Treated Reclaimed Asphalt Pavement Aggregates, Journal of Materials in Civil Engineering, ASCE, Vol. 23, No. 7, pp. 990-998.
Scullion, T.S., Sebasta, S., Harris, J.P., and Syed, I.., 2000, A Balanced Approach to Selecting the Optimal Cement Content for Soil-Cement Bases, Report 404611-1. Texas Transportation Institute,
Texas A&M University System, College Station, TX.
Sengul, O and Tasdemir, M.A., 2009, Conpressive Strength and Rapid Chlorine Permeability of Concrete with Ground Fly Ash and Slag, Journal of Materials in Civil Engineering, Vol. 21, No. 9, ASCE, pp. 494-501.
Setyawan, A., Muda, 34A., and S. As'ad, 2013, Unconfined Compressive Strength and Drying Shrinkage of Cement Treated Recycling Base at Bayolali-kartosuro Road rehabilitation, Advance Materials Research. Vol. 626, pp 34-38.
Taha, R., Al-Harthy, A., Al-Shamsi, K., and Al-Zubeidi, M., 2002, Cement Stabilization of Reclaimed Asphalt Pavement Aggregate for Road Baseand Subbases, Journal of Materials in Civil Engineering, ASCE, Vol. 14, No. 3, pp 239-245.
Tanudjaja, H., Sugiri, S.M. dan Khosama, L.K., 2000, Beton dengan Batu Andesit sebagai Agregat Kasar dan Tras Halus sebagai Substitusi Parsial Semen, Fakultas Teknik Universitas Sam Ratulangi.
Widayat dan Nono, 2009, Teknologi Daur Ulang Perkerasan Jalan, Makalah Semiloka Himpunan Pengembangan Jalan Indonesia (HPJI).
Wirtgen, 2004, Cold Recycling Manual 2nd Edition. Wirtgen, GmbH, Germany.
Yetgin, S., Cavdar, A., 2006, Study of Effect of natural Pozolan on Properties of Cement Mortars, Journal of Materials in Civil Engineering, ASCE, Vol. 18, No. 6, pp. 813-816.
Yuan, D., Nazarian, S., Hoyos, L.R., and Puppala, A.J., 2011, Evaluation and Mix Design of Cement-Treated Base materials with High Rap Content, Annual TRB Meeting. Paper No. 11-2742.
