Lateritic soil based-compressed earth bricks stabilized with phosphate binder

Mimboe, Aude Grace; Abo, Marina Tatiane; Djobo, Jean Noël Yankwa; Tomé, Sylvain; Kaze, Cyriaque Rodrigue; Deutou, Juvenal Giogetti Nemaleu

doi:10.1016/j.jobe.2020.101465

Cited by 56 publications

(36 citation statements)

References 15 publications

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“…It can be seen that the density values increase from 900˚C to 1100˚C, i.e. 1.87 to 2.06 g/cm 3 for the alluvial clays. This trend is in agreement with the results of the mechanical resistances (Figure 7 and Figure 8).…”

Section: Water Absorption Porosity and Densitymentioning

confidence: 92%

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Characterization of Clay Materials and Performance Evaluation of Fired Clay Composites Made for Low-Cost Housing

Mengue,

Mbessa,

Kaze

et al. 2022

JMMCE

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This study deals with the physico-chemical, mineralogical and geotechnical characterization of alluvial clays from Batchenga in Cameroon with a view to their use as building materials for housing. The alluvial clay (Arg.All) was collected in the locality of Batchenga at the village Natchigal (4˚20'40''N and 11˚37'40''E at 378 m altitude) and was fired between 900˚C and 1100˚C. Characterization was performed by XRD, XRF, DTA/DTG, and firing tests. XRD, XRF, DTA/DTG infrared analysis methods were performed on these clays. The linear shrinkage, mechanical strengths, water absorption, porosity and density were measured on the fired products. The results obtained show that the major oxides are for the Arg.Lat SiO 2 (72.13%), Al 2 O 3 (14.1%), Fe 2 O 3 (4.45%) and for the Arg.All: SiO 2 (48.91%), Al 2 O 3 (23.79%), Fe 2 O 3 (9.54%). The fired products based on alluvial clay, present the flexural strength of 4.45 MPa at 900˚C and 6.80 MPa at 1100˚C. As for those based on lateritic clay, the flexural strength is 0.53 and 0.76 MPa respectively at 900 and 1100˚C. The porosity is 33.69% at 900˚C and 22.93% at 1100˚C for the alluvial clay and 39.55% at 900˚C and 36.01% for the lateritic clay at 1100˚C. Water absorption is 18% to 11.16% for alluvial clay and 22.43% to 21.16% for lateritic clay at 900˚C and 1100˚C respectively. These results suggest that alluvial clay and its firing products have better physico-chemical, geotechnical and mechanical characteristics regardless of the firing temperature of the manufactured products. The addition of degreaser is recommended to improve the mechanical performance of lateritic clay.

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Section: Water Absorption Porosity and Densitymentioning

confidence: 92%

“…The valorisation of clay materials is of increasing interest in Cameroon. Current areas of interest are geopolymers [3] [9] [10] [11], nanocomposite materials [12] and ceramics [5] [13]- [19]. The results obtained are varied and mixed on the quality of their cooking product.…”

Section: Introductionmentioning

confidence: 99%

Characterization of Clay Materials and Performance Evaluation of Fired Clay Composites Made for Low-Cost Housing

Mengue,

Mbessa,

Kaze

et al. 2022

JMMCE

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“…Differential thermal analysis and thermogravimetric analysis (DTA/TG) (Model DTA409, NETZSCH, Waldkraiburg, Germany) were used to assess the thermal evolution of the geopolymer samples up to 1600 °C [ 22 , 23 ].…”

Section: Methodsmentioning

confidence: 99%

Controlling the Thermal Stability of Kyanite-Based Refractory Geopolymers

2021

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The present project investigated the thermal stability of cold-setting refractory composites under high-temperature cycles. The proposed route dealt with the feasibility of using fillers with different particle sizes and studying their influence on the thermo-mechanical properties of refractory geopolymer composites. The volumetric shrinkage was studied with respect to particle sizes of fillers (80, 200 and 500 µm), treatment temperature (1050–1250 °C) and amount of fillers (70–85 wt.%). The results, combined with thermal analysis, indicated the efficiency of refractory-based kyanite aggregates for enhancing thermo-mechanical properties. At low temperatures, larger amounts of kyanite aggregates promoted mechanical strength development. Flexural strengths of 45, 42 and 40 MPa were obtained for geopolymer samples, respectively, at 1200 °C, made with filler particles sieved at 80, 200 and 500 µm. In addition, a sintering temperature equal to 1200 °C appeared beneficial for the promotion of densification as well as bonding between kyanite aggregates and the matrix, contributing to the reinforcement of the refractory geopolymer composites without any sign of vitrification. From the obtained properties of thermal stability, good densification and high strength, kyanite aggregates are efficient and promising candidates for the production of environmentally friendly, castable refractory composites.

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“…SEM is a useful tool not only to verify the structure and topography of the samples but also to achieve the direct monitoring of polymer-soil and fiber-soil matrix interfaces [43]. Different SEM studies have been useful to illustrate the spatial correlations between the numerous components within soil matrices [32,66]. The samples, in this research, were examined using a JSM-6460LV model, branded JEOL, scanning electron microscope.…”

Section: Sem Analysismentioning

confidence: 99%