Enhancement of mechanical and hydrophobic properties of Adobes for Building Industry by the addition of polymeric agents

Pineda-Piñón, Jorge; Vega-Durán, J. T.; Manzano-Ramı́rez, A.; Pérez-Robles, J.F.; Balmori‐Ramírez, Heberto; Hernández-Landaverde, M. A.

doi:10.1016/j.buildenv.2005.10.009

Cited by 20 publications

(4 citation statements)

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“…But, the availability of starting material, the low energy consumption and the simplicity of production process justified their great usage as primary housing material in developing countries. Such constructions have good thermal comfort and sound insulation properties, but low durability [2,3]. Thus, during the last three decades, in central Africa for instance, the cement-based housing was preferred.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Clayey Soils from Congo and Physical Properties of Their Compressed Earth Blocks Reinforced with Post-Consumer Plastic Wastes

Elenga¹,

Mabiala²,

Ahouet³

et al. 2011

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Physical properties of compressed earth blocks reinforced with plastic wastes are compared to those of nonreinforced ones. These bricks are made with two clayey soils from two deposits of Congo located in Brazzaville and Yengola. Mineralogical and geotechnical analysis revealed that the soil of Brazzaville is mainly composed of kaolinite whereas that of Yengola is a mixture of kaolinite and illite. The amounts of clay (46 and 48%, respectively) are higher than those usually recommended for bricks’ production without stabilizers. Despite this difference of mineralogical compositions, the physical properties of these soils are quite similar. The compressive strength of the resulted bricks compacted with an energy of 2.8 MPa is about 1.5 MPa, which is the lower limit value allowed for adobes. Reinforcing with polyethylene waste nets increased the strength by about 20 to 30% and slightly enhanced resistance to water, Young’s modulus and strain to failure. However, the reinforcement had no significant effect either on bricks’ curing length or on their shrinkage

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Section: Introductionmentioning

confidence: 99%

Characterization of Clayey Soils from Congo and Physical Properties of Their Compressed Earth Blocks Reinforced with Post-Consumer Plastic Wastes

Elenga¹,

Mabiala²,

Ahouet³

et al. 2011

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“…This observed increment in water absorption from one concentration to the next implies a higher value of diffusion coefficient. A physical model of this effect was explained and illustrated in a previous paper [3]. The same effect can be explained in terms of the contact angle.…”

Section: Resultsmentioning

confidence: 87%

“…Clay particles, due to their intrinsic charge, are able to attract positive ions of water (H 3 O + ), cations of different elements and organic chemical compounds. Organic compounds have been used to decrease water adsorption of clays [3] and these can be cationic, anionic or neutral molecules. Cationic compounds with positive charge can establish strong bonds with particles of clay negatively charged.…”

Section: Introductionmentioning

confidence: 99%

Water diffusion in clays with added organic surfactants

Pineda-Piñón

López

Manzano-Ramı́rez

et al. 2007

J. Phys. D: Appl. Phys.

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Tensoactive agents may decrease water absorption in clay products like adobes. They modify the characteristics of the surface of clay particles. Characterization of water diffusion through the pores of modified clays is important to apply appropriate surface modifiers and to improve their performance. We established a simple model for water diffusion in test samples of defined dimensions to estimate real physical parameters and their effect on water absorption. Adsorption mechanisms are examined based on experimental results. The fitting of the experimental data to the model provides a deep understanding of water adsorption in chemically modified clays. A better agreement between the model and the experimental data is achieved for complex molecules.

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“…Several factors contribute to this variation of resistance: soil characteristics; type of stabilization; craft production; amount of water in the mixture; drying process among others. In research carried out by Piñón et al [2], compressive strength increased from around 1.2 MPa in normal adobes up to 2.2 MPa when surfactants and emulsified asphalt were added.…”

Section: Introductionmentioning

confidence: 97%

Evaluation of Mechanical Properties of Adobe Chemically Stabilized with "Synthetic Termite Saliva"

Corrêa

Bufalino

Protásio

et al. 2014

KEM

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The raw mud brick (adobe) is a millenary technology that awakens a wide interest in ecologic and non-conventional constructions. Some advantages are low cost, thermal comfort and minimum environmental impact. For better use, it is important to improve their mechanical properties. Dynasolo DS-328®is a chemical stabilizer used in soil compression for road paving and it is similar to termite saliva. This composition is based on vegetal oils. It is a high-concentrated liquid product, water soluble, non-toxic, non-corrosive, and non-flammable. The cohesive properties promote the investigation about the incorporation of this product in adobe composition. Therefore, this work aimed to evaluate synthetic termite saliva" incorporation to adobes at four different concentrations: 1:2000; 1:1500; 1:1000 and 1:500. The reagent is an aluminum sulfate at 1:5000 for all treatments. The soil is a Red Latosol cambisol corrected to 50% fine sand fraction. Soil bulk density, particle density and total pore volume were: Ds = 1.42 kg/dm3, Dp = 2.62 kg/dm3 and VTP = 45.8%. The soil Atterberg limits were: LL (liquid limit) 55.44%; PL (plastic limit) 34.58%; SL (shrinkage limit) 21.67%; and PI (plasticity index) 20.86%. The ideal moisture content was variable, ranging from 50% to 40% according synthetic termite saliva" increase. Adobes were submitted to compression and bending resistance tests. This research confirmed that synthetic termite saliva" incorporation improved the adobe compressive resistance and chose the treatment 1:1500 because it increased 20% this property.

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Enhancement of mechanical and hydrophobic properties of Adobes for Building Industry by the addition of polymeric agents

Cited by 20 publications

References 1 publication

Characterization of Clayey Soils from Congo and Physical Properties of Their Compressed Earth Blocks Reinforced with Post-Consumer Plastic Wastes

Characterization of Clayey Soils from Congo and Physical Properties of Their Compressed Earth Blocks Reinforced with Post-Consumer Plastic Wastes

Water diffusion in clays with added organic surfactants

Evaluation of Mechanical Properties of Adobe Chemically Stabilized with "Synthetic Termite Saliva"

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