Enhancement of the Properties of Compressed Stabilized Earth Blocks through the Replacement of Clay and Silt with Fly Ash
Received: 26 October 2021 | Revised: 10 November 2021 | Accepted: 16 November 2021 | Online: 11 December 2021
The use of earth as a building material, in different forms, such as unburnt and burnt bricks, rammed earth, mud blocks, and soil blocks, is a common practice globally. This study is focused on soil blocks stabilized with cement which are referred to as Cement Stabilized Earth Blocks (CSEBs). The strength and durability of CSEBs are primarily governed by the amount of silt and clay content (finer) in the soil. Many researchers have shown that low finer content improves the properties of CSEB and they have altered the finer content by adding different additives. The current study used a washing method to reduce the finer content and fly ash was utilized as finer to re-fill the soil to the required finer content amount. Also, soil grading was modified by adding larger particles that were separated from the same soil to fit the soil grading to the optimization curves mentioned in the literature. The finer content was changed to 5%, 7.5%, and 10%. Blocks were made by stabilizing the soil with 6%, 8%, and 10% cement and with the size of 150mm×150mm×150mm. The results revealed that fly ash addition up to 10% improves the properties of CSEBs and compressive strength changes from 4.28N/mm2 to 13.43N/mm2.
Keywords:cement stabilized earth blocks, fly ash, reduced silt and clay, improved properties
D. Silveira, H. Varum, A. Costa, T. Martins, H. Pereira, and J. Almeida, "Mechanical properties of adobe bricks in ancient constructions," Construction and Building Materials, vol. 28, no. 1, pp. 36–44, Mar. 2012, https://doi.org/10.1016/j.conbuildmat.2011.08.046.
J. C. Morel, A. Mesbah, M. Oggero, and P. Walker, "Building houses with local materials: means to drastically reduce the environmental impact of construction," Building and Environment, vol. 36, no. 10, pp. 1119–1126, Dec. 2001, https://doi.org/10.1016/S0360-1323(00)00054-8.
D. Allinson and M. Hall, "Hygrothermal analysis of a stabilised rammed earth test building in the UK," Energy and Buildings, vol. 42, no. 6, pp. 845–852, Jun. 2010, https://doi.org/10.1016/j.enbuild.2009.12.005.
F. Pacheco-Torgal and S. Jalali, "Earth construction: Lessons from the past for future eco-efficient construction," Construction and Building Materials, vol. 29, pp. 512–519, Apr. 2012, https://doi.org/10.1016/j.conbuildmat.2011.10.054.
F. McGregor, A. Heath, E. Fodde, and A. Shea, "Conditions affecting the moisture buffering measurement performed on compressed earth blocks," Building and Environment, vol. 75, pp. 11–18, May 2014, https://doi.org/10.1016/j.buildenv.2014.01.009.
J. E. Aubert, P. Maillard, J. C. Morel, and M. Al Rafii, "Towards a simple compressive strength test for earth bricks?," Materials and Structures, vol. 49, no. 5, pp. 1641–1654, May 2016, https://doi.org/10.1617/s11527-015-0601-y.
P. J. Walker, "Strength, durability and shrinkage characteristics of cement stabilised soil blocks," Cement and Concrete Composites, vol. 17, no. 4, pp. 301–310, Jan. 1995, https://doi.org/10.1016/0958-9465(95)00019-9.
G. H. Galabada, M. Rajapaksha, F. R. Arooz, and R. Halwatura, "Identifying the Impact of Concrete Specimens Size and Shape on Compressive Strength: A Case Study of Mud Concrete," Engineering, Technology & Applied Science Research, vol. 9, no. 5, pp. 4667–4672, Oct. 2019, https://doi.org/10.48084/etasr.3020.
A. L. Murmu and A. Patel, "Towards sustainable bricks production: An overview," Construction and Building Materials, vol. 165, pp. 112–125, Mar. 2018, https://doi.org/10.1016/j.conbuildmat.2018.01.038.
Annual survey of construction industries. Battaramulla, Sri Lanka: Department of Census and Statistics, 2015.
S. N. Malkanthi and A. Perera, "Durability of Compressed Stabilized Earth Blocks with Reduced Clay and Silt," IOP Conference Series: Materials Science and Engineering, vol. 431, Nov. 2018, Art. no. 082010, https://doi.org/10.1088/1757-899X/431/8/082010.
S. N. Malkanthi and A. a. D. a. J. Perera, "Particle Packing Application for Improvement in the Properties of Compressed Stabilized Earth Blocks with Reduced Clay and Silt," Engineering, Technology & Applied Science Research, vol. 9, no. 4, pp. 4538–4542, Aug. 2019, https://doi.org/10.48084/etasr.3002.
S. A. A. M. Fennis and J. C. Walraven, "Using particle packing technology for sustainable concrete mixture design," Heron, vol. 57, no. 2, pp. 73–102, 2012.
M. N. Mangulkar and S. S. Jamkar, "Review of Particle Packing Theories Used For Concrete Mix Proportioning," International Journal Of Scientific & Engineering Research, vol. 4, no. 5, pp. 143–148, 2013.
S. V. Kumar and M. Santhanam, "Particle packing theories and their application in concrete mixture proportioning: A review," Indian Concrete Journal, vol. 77, pp. 1324–1331, Sep. 2003..
S. N. Malkanthi, W. G. S. Wickramasinghe, and A. A. D. A. J. Perera, "Use of construction waste to modify soil grading for compressed stabilized earth blocks (CSEB) production," Case Studies in Construction Materials, vol. 15, Dec. 2021, Art. no. e00717, https://doi.org/10.1016/j.cscm.2021.e00717.
Techno Economic Feasibility Report on Flyash Bricks. New Delhi, India: Building Materials & Technology Promotion Council.
"Fly ash suppliers in India | Fly ash Manufacturers & Exporters in india - Cementation." https://cementationindia.com/fly-ash.html (accessed Nov. 20, 2021).
A. A. Landman, "Aspects of solid-state chemistry of fly ash and ultramarine pigments," Ph.D. dissertation, University of Pretoria, Pretoria, South Africa, 2005.
N. Bheel, M. A. Jokhio, J. A. Abbasi, H. B. Lashari, M. I. Qureshi, and A. S. Qureshi, "Rice Husk Ash and Fly Ash Effects on the Mechanical Properties of Concrete," Engineering, Technology & Applied Science Research, vol. 10, no. 2, pp. 5402–5405, Apr. 2020, https://doi.org/10.48084/etasr.3363.
S. A. Chandio, B. A. Memon, M. Oad, F. A. Chandio, and M. U. Memon, "Effect of Fly Ash on the Compressive Strength of Green Concrete," Engineering, Technology & Applied Science Research, vol. 10, no. 3, pp. 5728–5731, Jun. 2020, https://doi.org/10.48084/etasr.3499.
G. P. Makusa, State of the art review: Soil stabilization methods and materials in engineering practice. Luleå, Sweden: Luleå University of Technology, 2012.
A. A. Sofi, T. A. Sheikh, R. A. Wani, and A. Manzoor, "Cement stabilized earth blocks (CSEB): An economic and eco-friendly building material," IOSR Journal of Mechanical and Civil Engineering, vol. 13, no. 6, pp. 6–11, 2016.
C. Egenti, J. Khatib, and D. Oloke, "High Carbon Fly ash and Soil in Shelled Compressed Earth Masonry Units," International Journal of Interdisciplinary Research and Innovations, vol. 3, no. 4, pp. 61–65, Dec. 2015.
T. Shetty, B. K. Rao, and J. B. Pai, "A Feasibility Study on the Compressive Strength of Flyash and Lime Stabilized Laterite Soil Blocks," International Journal of Innovative Research in Science, Engineering and Technology, vol. 5, no. 9, pp. 73–80, 2016, https://doi.org/10.15680/IJIRSET.2016.0505512.
ASTM C117 (2003), Standard Test Method for Materials Finer than 75- µ m ( No . 200 ) Sieve in Mineral. West Conshohocken, PA, USA: ASTM International, 2003.
ASTM D4318-10, Standard Test Methods for Liquid Limit, Plastic Limit and Plasticity Index of Soils. West Conshohocken, PA, USA: ASTM International, 2010.
Specification For Compressed Stabilized Earth Blocks: Part 2 Test Methods. Colombo, Sri Lanka: Sri Lanka Standard Institution.
T. C. Powers, The Properties of Fresh Concrete, First Edition. New York, NY, USA: Wiley, 1968.
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