The mechanical and physical properties of compressed earth block stabilized with lime and filled with untreated and alkali-treated date palm fibers

Taallah, Bachir; Guettala, Abdelhamid

doi:10.1016/j.conbuildmat.2015.12.007

Cited by 134 publications

(79 citation statements)

References 35 publications

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“…e flexural strength and compressive strength of alkali-modified MQ6 are the highest at both early and late stages and much higher than those of other modified fibers. is result agrees with Taallah and Guettala's studies [40]. e 7-day flexural strength and compressive strength of MQ6 are 1.40 MPa and 2.64 MPa, the 28-day flexural and compressive strengths are 1.87 MPa and 3.90 MPa, and the 56-day flexural and compressive strengths are 2.43 MPa and 5.31 MPa, respectively.…”

Section: Effect Of Modification Methods On Strength Of Wsfccsupporting

confidence: 91%

Effect of Modification Methods of Wheat Straw Fibers on Water Absorbency and Mechanical Properties of Wheat Straw Fiber Cement‐Based Composites

Jiang

Cui

et al. 2020

Advances in Materials Science and Engineering

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Five modification methods are adopted for wheat straw fibers (WSFs). e effects of modification methods on the water absorbency of wheat straw fiber/wheat straw fiber cement-based composite (WSFCC) and the mechanical properties of WSFCC are analyzed. e crystallinity, chemical structure, and micromorphology of WSFs and WSFCC 28-day specimens are characterized by XRD, FTIR, and SEM methods. e results show that the water absorption of WSFs modified with sodium silicate solution, pure acrylic acid emulsion, and silicone waterproof emulsion surface spraying is 10.67%, 5.18%, and 1.05% lower than that of unmodified WSFs, respectively. Alkali modification is the ideal method for improving the strength of WSFCC. Establishing a fitting formula of the relationship between water absorption of WSFs and strength of WSFCC specimens has important theoretical and practical guiding significance for development and application of WSFCC.

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Section: Effect Of Modification Methods On Strength Of Wsfccsupporting

confidence: 91%

Effect of Modification Methods of Wheat Straw Fibers on Water Absorbency and Mechanical Properties of Wheat Straw Fiber Cement‐Based Composites

Jiang

Cui

et al. 2020

Advances in Materials Science and Engineering

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“…Similarly, there is a slight increase in porosity (Table 5). These observations are in agreement with t he results obtained by some authors who explained this decrease in density with an increase in the fiber content by a decrease in homogeneity, an improvement in the bonds and an increase in the porosity of the materials (Taallah, B., and Guettala, A., 2016). For others, it would be related to the low density of the fibers relative to the cement, which would lead to an increase in the volume of the compacted mixture thus inducing the reduction of the weight and the density of the materials (Ashour, T., Korjenic, A., and Korjenic, S., 2015).…”

Section: Physical Properties Of Ceb Stabilized With Cement and Shea Bsupporting

confidence: 93%

The effect of Shea butter wastes on Physical Properties of Compressed Earth Bricks (CEB) and Cement Stabilized

2019

Aust. J. Basic & Appl. Sci.

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The search for new types of low-cost, low-energy building materials has sparked renewed interest in recent years. It is with this in mind that a new category of compressed earth brick reinforced in agro-industrial wastes and likely to be "eco-sustainable" materials has been developed. This work aims to study the impact of the shea butter wastes rate on the thermal conductivity and Young's modulus of cement stabilized CEB. To do this, three clay materials noted F, K and Y have been characterized and used to produce CEB. The physico chemical characterization of these raw materials reveals that they consist mainly of kaolinite, quartz, iron compounds and micaceous phases. The geotechnical tests have revealed that the clay materials F and K belong to class A2 soils while Y class A3. Subsequently, earth bricks with different compositions in mass percentage of clay and shea butter wastes, stabilized with 5% of cement were made by compaction at 40 MPa. The thermal conductivity of the materials made, measured by the Hot Disk method, revealed a decrease in conductivity of 25% for formulations with clay F, 16% for formulations with clay K and 22% for formulations with clay Y, when shea butter wastes contents go from 0 to 10%. Likewise, a decrease in the density of the CEB was observed. Young's modulus results determined through ultrasound showed good rigidity when clay soil is substituted with shea butter wastes of up to 6% for formulations with F and Y and up to 8% for formulations with K. The strengthening of CEB stabilized with a small amount of cement to shea butter wastes improves their thermal insulation properties.

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“…To master this practice, we propose a mineralogical and chemical characterization of the earth used based on analysis and mechanical tests [1,2,3] and an evaluation of the mechanical characteristics of the earth mortar in two dry and wet cases [4,5,6,15]. We worked with the cement-stabilized earth mortar to determine its mechanical characteristics by simple compression tests on cylindrical specimens in both cases and by the capillary absorption ties to determine the water absorption coefficient [6,19]. This study also determines the area interval of the technico-economic optimum (OTE) [4,20].…”

Section: Introductionmentioning

confidence: 99%

Durability of the earth mortar: Physico-chemical and mineralogical characterization for the reduction of the capillary rise

et al. 2018

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Abstract. The stabilization of the earth material in the fields related to the earthen construction, in compliance with the standards in force, allows strong results of strength and durability. The chemical and mineralogical elements play an important role, in the presence of an 'optimum' cement dosage, to strengthen the ties between the clays and the grains of the earth.. This approach targets the search for better performances in the use of natural materials resource in an ecoresponsible habitat. This study presents the experimental results of the four techniques of mineralogical and chemical analysis on mortar specimens obtained from earth of the city of Fez. The results of the uni-axial compressive tests of the cylindrical specimens for this earth, associated by various percentages 0%, 4%, 7% and 10% by weight of cement, make it possible to analyze the effect of the mineralogical and chemical elements on the mechanical properties, namely Young's modulus, compressive strength and limiting deformation. However, we determine the water absorption coefficient of the mortar for different cement dosages in order to optimize the durability of the mortar against bad weather, rain and / or very wet climates. In the earth mortar of Fez, the strong presence of calcite (CaCO3), quartz SiO2 and dolomite CaMg (CO3)2 amplifies the improvement of the behavior of the material by the addition of cement. In fact, this strong presence of calcite stabilized the clay by cementing quartz and the cement matrix to strengthen the ties between the grains of the earth. In addition, with respect to the capillary rise, the water absorption decreases with the addition of cement. We also note that the evolution of the mechanical properties is of no importance except in the interval [4 to 7%] which represents the zone of effect for cement stabilization and which houses the optimum technicoeconomic cement dosing.Résumé. La stabilisation du matériau terre crue dans les domaines liés à la construction en terre, dans le respect des normes en vigueur, permet des résultats de résistance mécanique et de durabilité forts probants. Les éléments chimiques et minéralogiques y jouent un rôle déterminant et permettent, en présence d'un dosage 'optimal' du ciment, de renforcer les liens entre les argiles et les grains de la terre. Ainsi, la connaissance de la nature de la terre crue à utiliser dans la construction, par l'identification scientifique de ses composantes, est incontournable à cet effet. Cette démarche cible la recherche de performances meilleures dans l'utilisation des matériaux naturels et bio ressourcés au niveau d'un habitat éco responsable. Notre recherche présente les résultats expérimentaux des quatre techniques des analyses minéralogiques et chimiques sur des éprouvettes de mortier obtenues à partir d'une terre de la ville de Fès par la diffraction des rayons X, l'Infrarouge, le Microscope électronique à balayage et la fluorescence X. Les résultats des essais de compression uni-axiale des éprouvettes cylindriques de cette terre associé...

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The mechanical and physical properties of compressed earth block stabilized with lime and filled with untreated and alkali-treated date palm fibers

Cited by 134 publications

References 35 publications

Effect of Modification Methods of Wheat Straw Fibers on Water Absorbency and Mechanical Properties of Wheat Straw Fiber Cement‐Based Composites

Effect of Modification Methods of Wheat Straw Fibers on Water Absorbency and Mechanical Properties of Wheat Straw Fiber Cement‐Based Composites

The effect of Shea butter wastes on Physical Properties of Compressed Earth Bricks (CEB) and Cement Stabilized

Durability of the earth mortar: Physico-chemical and mineralogical characterization for the reduction of the capillary rise

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