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Article

Rammed Earth with Straw Fibers and Earth Mortar: Mix Design and Mechanical Characteristics Determination

Department of Civil Engineering Sciences and Architecture, Polytechnic University of Bari, Via E. Orabona 4, 70125 Bari, Italy
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Academic Editor: Marco Francesco Funari
Received: 16 February 2021 / Revised: 6 April 2021 / Accepted: 20 April 2021 / Published: 4 May 2021
(This article belongs to the Special Issue Fibres in Construction: Mechanical Modelling and Characterisation)
Raw earth is one of the oldest building materials, which is suitable for various uses: from the construction of load-bearing walls to use for plasters and finishes. The presence of straw fibers can give different behavior to this material. The present paper illustrates preliminary sensory and qualitative analyses, and subsequent laboratory tests that allow the characterization of the raw earth material with straw fibers for rammed earth constructions through mechanized compaction and the identification of a compatible earth mortar. The raw material considered in this study is mainly clayey; for this reason, a mix design usable with the pisé (or clay) technique has been developed. Cylindrical samples have been made through a press and subject to unconfined compression and indirect tensile tests. The results of the tests showed consistent tensile and compressive strength values in the context of earth materials. At the same time, a study for the realization of a mortar with the same base soil was carried out considering four mixtures, in order to investigate the best compromise between workability, shrinkage and compressive strengths. The purpose of the study was to investigate the mechanical characteristics of the local material through preliminary and laboratory tests, to classify it according to the Unified Soil Classification System (USCS) and to verify its suitability for a possible use in the construction field. View Full-Text
Keywords: raw earth; rammed earth; earth mortars; straw fibers; characterization tests; pisé technique raw earth; rammed earth; earth mortars; straw fibers; characterization tests; pisé technique
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MDPI and ACS Style

Sabbà, M.F.; Tesoro, M.; Falcicchio, C.; Foti, D. Rammed Earth with Straw Fibers and Earth Mortar: Mix Design and Mechanical Characteristics Determination. Fibers 2021, 9, 30. https://0-doi-org.brum.beds.ac.uk/10.3390/fib9050030

AMA Style

Sabbà MF, Tesoro M, Falcicchio C, Foti D. Rammed Earth with Straw Fibers and Earth Mortar: Mix Design and Mechanical Characteristics Determination. Fibers. 2021; 9(5):30. https://0-doi-org.brum.beds.ac.uk/10.3390/fib9050030

Chicago/Turabian Style

Sabbà, Maria F., Mariateresa Tesoro, Cecilia Falcicchio, and Dora Foti. 2021. "Rammed Earth with Straw Fibers and Earth Mortar: Mix Design and Mechanical Characteristics Determination" Fibers 9, no. 5: 30. https://0-doi-org.brum.beds.ac.uk/10.3390/fib9050030

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