Influência do diâmetro de caroços de tâmara moídos nas propriedades tecnológicas de tijolos de argila

Djafri, G.; Chelouah, N.

doi:10.1590/0366-69132018643722483

G. Djafri

University of Bejaia, Faculty of Technology, Laboratory of Construction Engineering and Architecture, 0600 Bejaia, Algeria

N. Chelouah ^* * nasser_chelouah@yahoo.fr

University of Bejaia, Faculty of Technology, Laboratory of Construction Engineering and Architecture, 0600 Bejaia, Algeria

* nasser_chelouah@yahoo.fr

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Figure 1
X-ray diffraction pattern of the clay.

Figura 1
Difratograma de raios X da argila.

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Figure 2
TGA and DTA curves of GDP.

Figura 2
Curvas de TGA e DTA de CTM.

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Figure 3
TGA curves of the sample containing 5 wt% of GDP compared with the control sample.

Figura 3
Curvas de TGA de amostra contendo 5% em massa de CTM em comparação com a amostra de controle.

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Figure 4
SEM micrograph of GDP (ground date pits).

Figura 4
Micrografia de MEV de CTM (caroço de tâmara moído).

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Figure 5
Shrinkage as a function of diameter and content of GDP of unfired (a) and fired (b) samples.

Figura 5
Retração em função do diâmetro e fração de CTM de amostras antes (a) e depois (b) da queima.

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Figure 6
SEM micrographs of fired clay bricks with different diameter of GDP: a) 0-0.20 mm; b) 0.20-0.25 mm; c) 0.25-0.50 mm; and d) 0.50-1.0 mm.

Figura 6
Micrografias de MEV de tijolos após queima com diferentes diâmetros de CTM: a) 0-0.20 mm; b) 0.20-0.25 mm; c) 0.25-0.50 mm; e d) 0.50-1.0 mm.

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Figure 7
Compressive strength as a function of diameter and content of GDP of unfired (a) and fired (b) samples.

Figura 7
Resistência à compressão em função do diâmetro e fração de CTM de amostras antes (a) e depois (b) da queima.

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Figure 8
Compressive strength as a function of diameter and content of GDP of unfired (a) and fired (b) samples.

Figura 8
Resistência à flexão em função do diâmetro e fração de CTM de amostras após queima.

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Figure 9
Thermal conductivity as a function of diameter and content of GDP of fired samples.

Figura 9
Condutividade térmica em função do diâmetro e fração de CTM de amostras após queima.

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Figure 10
Pore size distribution curves of clay containing 5 to 20 wt% of ground date pits (GDP) with diameter of 0.5-1 mm.

Figura 10
Curvas de distribuição de tamanho de poros de argila contendo 5 a 20% em massa de caroços de tâmara moídos (CTM) com diâmetro de 0,5-1 mm.

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Table I
Chemical composition of the clay (wt%).

Tabela I
Composição química da argila (% em massa).

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Table II
Mineral composition of the clay (wt%).

Tabela II
Composição mineral da argila (% em massa).

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Table III
Chemical composition of ground date pits - GDP (wt%).

Tabela III
Composição química dos caroços de tâmara moídos - CTM (% em massa).

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Table IV
Water content for plasticity (%) of clay-GDP mixtures as a function of diameter and content of the GDP.

Tabela IV
Teor de água para plasticidade (%) das misturas argila-CTM em função do diâmetro e fração de CTM.

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Table V
Water absorption coefficient - C (%) as a function of diameter and content of GDP of fired samples, according to NA 1957 standard.

Tabela V
Coeficiente de absorção de água - C (%) em função do diâmetro e fração de CTM de amostras após queima, de acordo com norma NA 1957.

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Table VI
Water absorption (%) as a function of diameter and content of GDP of fired samples.

Tabela VI
Absorção de água (%) em função do diâmetro e fração de CTM de amostras após queima.

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Table VII
Apparent density (g/cm3) as a function of diameter and content of GDP of fired samples.

Tabela VII
Densidade aparente (g/cm3) em função do diâmetro e fração de CTM de amostras após queima.

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Table VIII
Apparent porosity (%) as a function of diameter and content of GDP of fired samples.

Tabela VIII
Porosidade aparente (%) em função do diâmetro e fração de CTM de amostras após queima.

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(A)

Table I Chemical composition of the clay (wt%).

SiO₂	Al₂O₃	CaO	Fe₂O₃	MgO	K₂O	Na₂O	SO₃	TiO₂	P₂O₅	LOI
43.30	13.35	15.34	5.01	1.89	2.03	1.06	0.71	0.63	0.19	16.50

Table II Mineral composition of the clay (wt%).

Quartz	Calcite	Muscovite	Kaolinite	Albite	Gypsum	Dolomite	Palygorskite	Clinochlore	Ferruginous minerals
22	26	17	10	6	2	3	5	4	5

Table III Chemical composition of ground date pits - GDP (wt%).

Moisture	Carbohydrate	Protein	Lipid	Cellulose	Ash
6.46	50.50	7.22	9.51	16.20	10.20

Table IV Water content for plasticity (%) of clay-GDP mixtures as a function of diameter and content of the GDP.

GDP	0-0.20 mm	0.20-0.25 mm	0.25-0.50 mm	0.50-1.0 mm
5%	22.96±0.19	23.18±0.19	23.97±0.20	25.05±0.22
10%	24.86±0.20	25.32±0.20	26.38±0.21	28.29±0.20
15%	27.73±0.20	28.97±0.20	29.91±0.20	32.29±0.20
20%	33.45±0.21	34.52±0.22	35.56±0.22	37.29±0.22

Table V Water absorption coefficient - C (%) as a function of diameter and content of GDP of fired samples, according to NA 1957 standard.

GDP	0-0.20 mm	0.20-0.25 mm	0.25-0.50 mm	0.50-1.0 mm
5%	16.25±0.21	18.22±0.21	19.48±0.19	20.98±0.20
10%	20.45±0.19	21.21±0.24	22.23±0.21	23.65±0.21
15%	25.98±0.20	25.79±0.24	26.50 ± 0.21	27.10±0.20
20%	27.98±0.22	28.97±0.19	29.89±0.20	30.39±0.19

Table VI Water absorption (%) as a function of diameter and content of GDP of fired samples.

GDP	0-0.20 mm	0.20-0.25 mm	0.25-0.50 mm	0.50-1.0 mm
5%	17.86±0.22	18.68±0.22	20.02±0.21	23.87±0.22
10%	22.20±0.20	24.05±0.21	24.84±0.21	26.59±0.21
15%	24.93±0.21	26.27±0.21	27.11±0.22	28.55±0.22
20%	26.97±0.23	28.80±0.23	30.55±0.21	31.38±0.20

Table VII Apparent density (g/cm3) as a function of diameter and content of GDP of fired samples.

GDP	0-0.20 mm	0.20-0.25 mm	0.25-0.50 mm	0.50-1.0 mm
5%	1.68±0.03	1.66±0.04	1.58±0.03	1.46±0.04
10%	1.43±0.04	1.39±0.03	1.37±0.03	1.33±0.03
15%	1.32±0.03	1.30±0.03	1.28±0.03	1.25±0.03
20%	1.27±0.04	1.24±0.03	1.23±0.03	1.20±0.03

Table VIII Apparent porosity (%) as a function of diameter and content of GDP of fired samples.

GDP	0-0.20 mm	0.20-0.25 mm	0.25-0.50 mm	0.50-1.0 mm
5%	30.00±0.22	31.00±0.22	31.63±0.25	34.85±0.24
10%	31.74±0.23	33.33±0.25	34.03±0.26	35.36±0.21
15%	32.90±0.28	34.15±0.26	34.70±0.26	35.68±0.22
20%	34.25± 0.22	35.59±0.22	37.57±0.24	37.65±0.25

[1] * nasser_chelouah@yahoo.fr

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Influência do diâmetro de caroços de tâmara moídos nas propriedades tecnológicas de tijolos de argila

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