[01] Nermine Abdel Gelil Mohamed, Department of Architectural Systems Engineering, October University for Modern Sciences and Arts (MSA University), 6^th of October City, Egypt. [02] Mostafa Mohamed Soliman, Department of Architectural Systems Engineering, October University for Modern Sciences and Arts (MSA University), 6^th of October City, Egypt. [03] Nourhan Abdelhamid Abbas, Department of Architectural Systems Engineering, October University for Modern Sciences and Arts (MSA University), 6^th of October City, Egypt.

Building with compressed stabilized earth bricks (CSEB) is considered one of the most low cost environmentally-friendly technologies. The future potentialities of the material and building technique in reducing the use of fired bricks and concrete in Egypt are very strong, especially when the bricks are produced using sandy soil, available all over the country. In order to promote the awareness of this technology, many institutions around the world conduct training workshops. This paper aims at comparing between the intensive hands-on training workshops on the production and masonry of CSEB attended by MSA University students at Auroville Earth Institute (Auroville, India) and MSA Center of Earth (6th of October, Egypt). The comparison covers the following points: 1) workshop program, 2) soil identification and sensitive field tests, 2) press machine model, 3) shapes of produced bricks, 4) production process from preparing mixtures to stacking, and 5) masonry. Besides the gathered observations and comments, 6) a questionnaire consisting of these points was developed and handed to the team that attended the two workshops. According to the trainees’ observations and questionnaire results, differences in languages and accents were significant issues in understanding explanations and instructions, less theoretical content and in-situ lectures was preferable to all and the large number of trainees results in lack of tools. Based on their experience, manually sieving and mixing the ingredients was easy but using a hydraulic press machine to manufacture CSEB was faster and less labor-intensive. In addition, stacking the units on pallets near the machine made the brick less likely to damage. Using quality control tools such as a penetrometer and calliper was essential for producing good bricks. Producing bricks with various shapes and colors was more interesting and athletically appealing to them. As for the masonry training, although using real bricks was slower and more complicated, it was useful for acquiring practical experience. Finally, the social dimension, such as making new friends, was as important as the other advantages of the workshops.

Compressed Stabilized Earth Bricks, CSEB, ISSB, Press Machine, Sandy Soil, Soil Field Tests, Egypt, India, Auroville Earth Institute, MSA Center of Earth, MSA University, Cement Stabilization

[01] Housing and Building National Research Center HBRC (2016). The Egyptian code for building with stabilized earth – part one: building with compressed earth units. Cairo: HBRC. [02] Auroville Earth Institute AVEI (2010). Production and use of compressed stabilized earth blocks – code of practice. Auroville: Auroville Earth Institute. [03] Auroville Earth Institute. Compressed stabilized earth block. Retrieved January, 2019, from http://www.earth-auroville.com/compressed_stabilised_earth_block_en.php [04] Brazilian Association of Technical Standards ABNT (2012). NBR 8491: Soil-cement brick: requirements. Rio de Janeiro: ABNT. [05] Brazilian Association of Technical Standards ABNT (2012). NBR 8492: Soil-cement brick: dimensional analysis, determination of compressive strength and water absorption: test method. Rio de Janeiro: ABNT. [06] Brazilian Association of Technical Standards ABNT (2012). NBR 10833: Manufacture of brick and block of soil-cement using manual or hydraulic press: procedure. Rio de Janeiro: ABNT. [07] Brazilian Association of Technical Standards ABNT (2012). NBR 10834: Block of soil-cement without structural function: requirements. Rio de Janeiro: ABNT. [08] Eco Maquinas (2016). Operation and maintenance manual: model Eco Brava - bricks manufacturing and ecological floors. In Eco Maquinas (Ed.), Operation and maintenance manual. Campo Grande Brazil: Eco Máquinas Ind. Com. Imp. Exp. Ltda. [09] Eco Maquinas. The Compressed earth block. Retrieved January, 2019, from https://ecomaquinas.com.br/the-compressed-earth-block [10] Auroville Earth Institute (2016). CSEB intensive course. In Auroville Earth Institute (Ed.), Handouts. India: Auroville Earth Institute. [11] MSA Center of Earth (2017). Intensive hands-on training workshops on the production and masonry of interlocking compressed stabilized soil bricks ISSB. In MSA Center of Earth (Ed.), Handouts. Egypt: MSA Center of Earth. [12] Portland Cement Association. (1986). Dosing of soil-cement mixtures: dosing rules and methods of testing. São Paulo - SP: ABCP. [13] Auroville Earth Institute (2009, April). Auram Block Press: Specifications of the Press 3000. Retrieved from http://www.earth-auroville.com/compressed_stabilised_earth_block_en.php. [14] Brazilian Association of Technical Standards ABNT (2012). NBR 11798: Soil-cement based materials: requirements. Rio de Janeiro: ABNT. [15] Brazilian Association of Technical Standards ABNT (2012). NBR 12023: Soil-cement: Compaction test. Rio de Janeiro: ABNT. [16] Brazilian Association of Technical Standards ABNT (2012). NBR 12024: Soil-cement: molding and curing of cylindrical specimens: procedure. Rio de Janeiro: ABNT. [17] Brazilian Association of Technical Standards ABNT (2012). NBR 16096: Soil-cement: determination of the degree of spraying: test method. Rio de Janeiro: ABNT. [18] Acchar, W. & Marques, K. J. (2016). Ecological Soil Cement bricks from waste materials. Switzerland: Springer International Publishing (Springer Nature). Doi 10.1007/978-3-319-28920-5 [19] Ruiza, G., Zhangab, X., Fouad, W., Cañasd, E., & Garijoa, L. (2018). A comprehensive study of mechanical properties of compressed earth blocks. Construction and Building Materials, 176 (10 July 2018), 566-572. doi: 10.1016/j.conbuildmat.2018.05.077 [20] Sitton, J. D., Zeinali, Y., Heidarian, W. H., & Story, B. A. (2018). Effect of mix design on compressed earth block strength. Construction and Building Materials, 158 (15 January 2018), 124-131. doi: 10.1016/j.conbuildmat.2017.10.005 [21] Murmu, A. L., & Patel, A. (2018). Towards sustainable bricks production: An overview. Construction and Building Materials, 165 (20 March 2018), 112-125. doi: 10.1016/j.conbuildmat.2018.01.038 [22] Brazilian Association of Technical Standards ABNT (2012). NBR 12025: Soil-cement: simple compression test of cylindrical specimens: test method. Rio de Janeiro: ABNT. [23] Brazilian Association of Technical Standards ABNT (2012). NBR 12253: Soil-cement: dosage for use as a layer of pavement: procedure. Rio de Janeiro: ABNT. [24] Brazilian Association of Technical Standards ABNT (2012). NBR 13553: Materials for use in monolithic soil-cement wall without structural function: requirements. Rio de Janeiro: ABNT. [25] Brazilian Association of Technical Standards ABNT (2012). NBR 13554: Soil-cement: wettability and dryness test: test method. Rio de Janeiro: ABNT. [26] Brazilian Association of Technical Standards ABNT (2012). NBR 13555: Soil-cement: durability test: determination of water absorption: wettability and drying test method: test method. Rio de Janeiro: ABNT. [27] Brazilian Association of Technical Standards ABNT (2013). NBR 10836: Block of soil-cement without structural function: dimensional analysis, determination of resistance to compression and water absorption: test method. Rio de Janeiro: ABNT.