AUTHORS: Pavel Padevet, Tereza Otcovska, Barbora Muzikova
Download as PDF
ABSTRACT: The rammed unfired earth is one of the most eco-friendly materials, because the energy requirement for design is lower than the energy required for masonry brick structures. This paper is devoted to the characteristics of the rammed earth that is very much needed to design structures from this material. First, attention is paid to the preparation of test specimens from clay, sand and water. Dimensions of prism specimens for material testing are 40 × 40 × 160 mm. Creep measurement is performed on specimens of 70 mm length and octagonal cross-sectional area with distance of oposite sides of 20 mm. Secondly, the measurement procedures and the results of material tests of compressive strength and tensile strength in bending are presented. Third, determination of shrinkage and shrinkage is described and reported for a particular mixture. Material properties such as strength and modulus of elasticity are closely related to creep and are also listed. At the end, the advantages and disadvantages of the rammed unfired earth are discussed in terms of acquired material properties.
KEYWORDS: Illitic – Kaolinitic Clay, Shrinkage, Compression Strength, Tensile Strength in Bending, Rammed Earth
REFERENCES:
[1] G. Minke, Building With Earth
[online]. 2006,
[ published August 18, 2015]. ISBN 978-3-0346-0822-0. Available from: http://archive.org/details/Gernot Minke-Building With Earth.
[2] J. Norton, Building with Earth, A Handbook, Berlin, 2006, pp. 24 – 44, ISBN 978-3-7643- 7477-8.
[3] H. Schroeder, Moisture transfer and change in strength during the construction of eathern buildings, Informes de la Construction, Vol. 63, No. ´ 523,2011, pp. 107–113.
[4] I. Zab ˇ ckov ˇ a,, Clay buildings
[online]. Brno, Era ´ 21, 2002
[vid. August 18, 2015], ISBN 80-86517- 21-7.
[5] T. Otcovska, B. Mu ´ zˇ´ıkova, P. Padev ´ et, Drying ˇ Characteristics of Rammed Earth with Illitic– Kaolinitic Clay Content, NMM 2017, Acta Polytechnica CTU Proceedings, Vol 13, 2017, 89 – 92.
[6] M, Jankula, T. Hulan, I. Stub ˇ na, J. Ondru ˇ ska, R. ˇ Podoba, P. Sˇ´ın, P. Bacik, A. Trnik, The influence ˇ of heat on elastic properties of illitic clay Radobica,/ Journal of the Ceramic Society of Japan, Vo. 123, Issues 1441, 2015, pp. 874 – 879.
[7] P. Padevet, T. Otcovsk ˇ a, Material Properties Clay ´ Mortar for Structural Use, 6th European Conference of Civile Engineering ECCIE’15, 2015, Budapest, 4 pages.
[8] P. Padevet, P. Bittnar, T. Otcovsk ˇ a, Shrinkage of ´ Rammed Earth Based on Illitic Clay, 56th International Scientific Conference on Experimental Stress Analysis EAN 2018, 2018, Harrachov, Czech Republic, pp. 321 – 325.
