scholarly journals Water absorption measurements on WPCs: Assessment of size and direction dependencies in order to design fast and accurate quality control tests

2019 ◽  
Vol 77 ◽  
pp. 105899 ◽  
Author(s):  
Florent Faure ◽  
Arnaud Perrot ◽  
Sylvie Pimbert ◽  
Thibaut Lecompte
Keyword(s):  
Quality Control ◽  
Water Absorption ◽  
Absorption Measurements

Preparation of ZrO2 Composite Ceramics with High Thermal Shock Resistance

2012 ◽  
Vol 455-456 ◽  
pp. 650-654 ◽  
Author(s):  
He Yi Ge ◽  
Jian Ye Liu ◽  
Xian Qin Hou ◽  
Dong Zhi Wang
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Sintering Temperature ◽  
Fiber Composite ◽  
Physical And Mechanical Properties ◽  
Composite Ceramics ◽  
Shock Resistance ◽  
Absorption Measurements

The physical and mechanical properties of nanometer ZrO2-ZrO2fiber composite ceramics were studied by introduction of ZrO2fiber. ZrO2composite ceramics at different sintering temperature was investigated by porosity and water absorption measurements, flexual strength and thermal shock resistance analysis. Results showed that ZrO2composite ceramics containing 15 wt% ZrO2fiber with sintering temperature of 1650°C exhibited good mechanical properties and thermal shock resistance. The porosity and the water absorption were 8.84% and 1.62%, respectively. The flexual strength was 975 MPa and the thermal shock times reached 31 times. Scanning electron microscope (SEM) was used to analyze the microstructure of ZrO2composite ceramics.

Thermal Shock Resistance of ZrO2 Fiber/Al2O3 Ceramics

2011 ◽  
Vol 306-307 ◽  
pp. 754-757 ◽  
Author(s):  
Xian Qin Hou ◽  
Jian Ye Liu ◽  
He Yi Ge
Keyword(s):  
Mechanical Properties ◽  
Electron Microscope ◽  
Water Absorption ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Sintering Temperature ◽  
Physical And Mechanical Properties ◽  
Shock Resistance ◽  
Scanning Electron ◽  
Absorption Measurements

The physical and mechanical properties of alumina (Al2O3) ceramics by introduction of zirconia (ZrO2) fiber were studied. ZrO2/Al2O3ceramics at different sintering temperature was investigated by porosity and water absorption measurements, flexual strength and thermal shock resistance analysis. Results showed that Al2O3 ceramics containing 15 wt% ZrO2fiber with sintering temperature of 1650°C exhibited good mechanical properties and thermal shock resistance. The porosity and water absorption were 7.4% and 0.69%, respectively. The flexual strength was 613 MPa and the thermal shock times reached 29 times. Scanning electron microscope (SEM) was used to analyze the microstructure of Al2O3 ceramics.

Design and evaluation of restoration mortars for historic masonry using traditional materials and production techniques

2002 ◽  
Vol 712 ◽  
Author(s):  
Antonia Moropoulou ◽  
Asterios Bakolas ◽  
Petros Moundoulas ◽  
Eleni Aggelakopoulou ◽  
Sofia Anagnostopoulou
Keyword(s):  
Mechanical Strength ◽  
Water Absorption ◽  
Mechanical Tests ◽  
Hydraulic Lime ◽  
Historic Masonry ◽  
Natural Hydraulic Lime ◽  
Total Percentage ◽  
Lime Mortars ◽  
Production Techniques ◽  
Absorption Measurements

ABSTRACTCement based mortars used for historic masonry restoration presented unsatisfactory results, due to their chemical and physico-mechanical incompatibility to original buildings. In the present research, several syntheses of restoration mortars are produced using traditional techniques and materials such as binders (aerial and natural hydraulic lime), pozzolanicadditives (natural and artificial pozzolanas) and aggregates (sand and crushed brick). The technical characteristics of the mortars were determined using mechanical tests (compressive and flexural) and mercury intrusion porosimetry measurements at the time of 1, 3, 9, 15 months of curing. Water absorption measurements were performed at the time of 9 and 15 months curing, in order to evaluate mortars microstructural characteristics, their rate of water absorption and the total percentage of absorbed water. The aerial lime - artificial pozzolana mortar presented the best mechanical and microstructural performance. Hydraulic mortars acquired the maximum of the mechanical strength in 1 month, lime - pozzolana mortars in 3 months while aerial lime mortars continue to gain mechanical strength even in 15 months curing. Furthermore, the use of ceramic aggregates produces lightweight and elastic mortars, compatible to historicones.

Probing the Properties of Nanocomposites Synthesized from Aramid and Surface-Modified Clay

2009 ◽  
Vol 62 (5) ◽  
pp. 441 ◽  
Author(s):  
Sonia Zulfiqar ◽  
Zahoor Ahmad ◽  
Muhammad Ilyas Sarwar
Keyword(s):  
Water Absorption ◽  
Clay Content ◽  
Layered Silicates ◽  
Solution Intercalation ◽  
Diacid Chloride ◽  
Carbonyl Chloride ◽  
Two Phases ◽  
End Capping ◽  
Surface Modified ◽  
Absorption Measurements

Nanocomposites were prepared by the inclusion of layered silicates into the aramid matrix via a solution intercalation technique. Polyamide was synthesized by reacting 4,4′-oxydianiline with isophthaloyl chloride and then end-capping with carbonyl chloride end groups using excess diacid chloride. The compatibility between the two phases was obtained through surface modification of montmorillonite with long-chain alkyl diamine. The nanocomposites were characterized with regard to structural, morphological, mechanical, thermal, and water absorption measurements. These investigations confirmed the formation of delaminated and disordered intercalated nanostructures at different clay loadings. Mechanical properties were significantly enhanced relative to pristine polyamide, even with the addition of only 2 wt-% of nanoclay. Thermal decomposition temperatures of the nanocomposites were in the range 300–450°C. Glass transition temperature data exhibited improvement (123°C) up to 16 wt-% addition of organoclay. Water absorption of the neat aramid was rather high (5.7%), but decreased with augmenting clay content.

scholarly journals Evaluación de materias primas utilizadas en la fabricación de baldosas de gres en el sector cerámico de Norte de Santander (Colombia)

Respuestas ◽  
2016 ◽  
Vol 21 (2) ◽  
pp. 48 ◽  
Author(s):  
Jorge Sánchez-Molina ◽  
Alejandra Sarabia-Guarin ◽  
Diana Carolina Alvarez-Rozo
Keyword(s):  
Quality Control ◽  
Water Absorption ◽  
Raw Materials ◽  
Drying Shrinkage ◽  
Clay Material ◽  
Ceramic Analysis ◽  
Mineralogical Characteristics ◽  
Palabras Clave ◽  
Materials Used ◽  
Fire Clay

Antecedentes: Los municipios de Cúcuta, Los Patios, Villa del Rosario, El Zulia y San Cayetano, representan el 10% de la extensión del departamento de Norte de Santander, y el 6,85% de su territorio lo ocupa la industria cerámica, la cual produce todo tipo de productos derivados de la arcilla; mineral cuyas características físicas, químicas y mineralógicas varían ampliamente, por lo que el control de la calidad de los productos empieza por la caracterización y control de calidad de sus materias primas. Objetivo: Caracterizar mediante análisis químicos, mineralógicos y físico-cerámicos tres materias primas utilizadas en la fabricación de productos de gres: arcilla, chamota y caliza provenientes del departamento Norte de Santander. Métodos: Se caracterizaron las materias primas mediante las técnicas de DRX, FTIR, y ensayos físico-cerámicos que incluyen contracción en secado, contracción en cocido, absorción de agua, pérdidas por calcinación y porcentaje de arena. Posteriormente por extrusión y prensado se obtuvieron probetas de tres tipos de mezclas referenciadas como M1, M2 y M3, con diferente composición de material arcilloso, chamota y caliza, luego se sinterizaron a 1050°C-1250°C y se analizó la absorción de agua y el porcentaje de contracción en la curva de gresificación. Resultados: El patrón de DRX muestra la presencia de cuarzo y caolinita en la arcilla, y de calcita y cuarzo en la caliza, lo cual se evidencia en el espectro FTIR. El comportamiento físico-cerámico de las mezclas realizadas evidenció valores significativamente bajos de absorción de agua (inferior al 6%) con temperaturas de cocción de entre 1150°C y 1250°C. Conclusión: Se identificó que las materias primas evaluadas son aptas para la fabricación de baldosas de gres, siendo M3-E la formulación más óptima, compuesta por 80% material arcilloso, 15% chamota y 5% caliza (pasante malla 100), y moldeada por extrusión. Palabras clave: arcilla, absorción de agua, caliza, difracción de rayos x, espectroscopia infrarroja.AbstractBackground: The municipalities of Cucuta, Los Patios, Villa del Rosario, Zulia and San Cayetano, representing 10% of the department’s extension of Norte de Santander, and 6.85% of its territory is occupied by the ceramic industry, which produces all kinds of products derived from clay; mineral whose physical, chemical and mineralogical characteristics vary widely, so the quality control of products, beginning with the characterization and  quality control of raw materials. Objective: To characterize by chemical, mineralogical, and physico-ceramic analysis three raw materials used in the manufacture of ceramic: clay, fire clay and limestone from the Norte de Santander department. Methods: raw materials were characterized by techniques of DRX, FTIR, and physical-ceramic tests including shrinkage in drying shrinkage cooked, water absorption, loss on ignition and percentage of sand. Subsequently they extruded and pressed samples of three types of mixtures referenced as M1, M2 and M3, with different composition of clay, fire clay, limestone, then were sintered at 1050°C-1250°C and the behavior of water absorption and the percentage shrinkage was analyzed in vitrification curve. Results: The pattern of DRX shows the presence of quartz and kaolinite in the clay and calcite and quartz in the limestone, which is evident in the FTIR spectrum. The physical-ceramic behavior of mixtures made significantly low showed water absorption values (less than 6%) with firing temperatures between 1150°C and 1250°C. Conclusion: Was identified that assessed raw materials are suitable for manufacturing of stoneware tiles, being M3-E the most optimal formulation composed of 80% clay material, 15% grog, and 5% limestone (through 100 mesh), and molded by extrusion.Keywords: clay, calcite, x-ray diffraction, infrared spectroscopy, water absorption

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