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"The Purpose of this paper is to study the mechanical behavior of concrete blocks and prisms when performing axial compression tests within the Brazilian base of knowledge, intending to foment data of this kind for a world based networks. The block were built using five different mixtures in which the quantity of cement and the compacting ratio (density) were varied ( during the fabrication process). The three course high prisms were assembled using 1 cm (0.39 in.) thick full badded joints, always trying to leave the mortar's characteristic constant . The axial compression test were conducted according to Brazilian practice code recommendations, because most of the these standards are very similar to international practice code s. The compressive strenght, strains, and rupture form of each mixture studied were recorded . Attempts were made to correlate the strength, efficiency ratio(block strength / prism strength of the prisms, strains and rupture form ; with the quantity of cement and compacting ratio. The data are presented in tables and figures, and the obtained results are discussed throughout the text."

"In this book, which focuses on the use of iterative methods for solving large sparse systems of linear equations, templates are introduced to meet the needs of both the traditional user and the high-performance specialist. Templates, a description of a general algorithm rather than the executable object or source code more commonly found in a conventional software library, offer whatever degree of customization the user may desire. Templates offer three distinct advantages: they are general and reusable; they are not language specific; and they exploit the expertise of both the numerical analyst, who creates a template reflecting in-depth knowledge of a specific numerical technique, and the computational scientist, who then provides "value-added" capability to the general template description, customizing it for specific needs. For each template that is presented, the authors provide: a mathematical description of the flow of algorithm; discussion of convergence and stopping criteria to use in the iteration; suggestions for applying a method to special matrix types; advice for tuning the template; tips on parallel implementations; and hints as to when and why a method is useful."

"Kertas kerja ini membentangkan keputusan kajian makmal blok ringan konkrit apityang diperkukuh dengan jejaring dan teras kekotak simenfero berkekuatan tinggi. Kajiantertumpu kepada kesan penggunaan pelbagai jenis jejaring serta lapisan jejaring bagimenghasilkan kekotak simenfero tersebut. Dua jenis jejaring digunakan; jejaring mata punai, danjejaring segiempat. Keputusan ujian terhadap kekuatan mampatan, berat keseluruhan unit blokdan mod kegagalan telah diperolehi. Keputusan dibandingkan dengan sampel kawalan yangdiperbuat dari blok konkrit tanpa diperkukuh. Hasilnya didapati kekuatan mampatan meningkatdengan ketara bagi sampel yang diperkukuh. Manakala berat keseluruhan unit blok memenuhipiawai bagi komponen struktur ringan. Kesan keseluruhan mendapati bahawa blok yang padaasalnya rapuh bertukar menjadi lebih mulur degan penggunaan kekotak simenfero. "

"It is widely use ofair-conditioning systems in Thailand due to its location. It is located in atropical zone with relatively high temperatures all year round, with highhumidity and high intensity of sunlight. In order to save electrical energy forair-conditioning systems, preventing heat transfer into the building isrequired. The objective of this study is to investigate the physical andthermal properties of concrete blocks. An attempt is made to increase heatresistance of concrete blocks. Foam beads (0-0.30% by weight) and kaolin (0-70% by weight) wereadded in concrete block mixture to increase discontinuous voids in concrete.Compressive strength and water absorption of concrete blocks were tested. Thetesting results indicated that compressive strength decreased when foam beadsand kaolin were added. Water absorption increased when foam beads were added.In contrast, the more kaolin added the less water absorption. The thermalconductivity coefficient of concrete blocks was also investigated. The resultsconfirmed that the higher the amount of foam beads or kaolin added, the higherthe thermal resistance of concrete blocks. Thermal time-lag behavior was alsoinvestigated. The results indicated that concrete block with kaolin took thelongest time in heating and took the shortest time in cooling. These propertiesare good for heat prevention in hot climate regions. These concrete blockswhich were developed and tested in this research conform to the Thai IndustrialStandard. Finally, it can be concluded that because of its thermal behavior,concrete block with kaolin is a suitable energy-saving concrete block for hotand humid climates."

"It is widely use of air-conditioning systems in Thailand due to its location. It is located in a tropical zone with relatively high temperatures all year round, with high humidity and high intensity of sunlight. In order to save electrical energy for air-conditioning systems, preventing heat transfer into the building is required. The objective of this study is to investigate the physical and thermal properties of concrete blocks. An attempt is made to increase heat resistance of concrete blocks. Foam beads (0−0.30% by weight) and kaolin (0−70% by weight) were added in concrete block mixture to increase discontinuous voids in concrete. Compressive strength and water absorption of concrete blocks were tested. The testing results indicated that compressive strength decreased when foam beads and kaolin were added. Water absorption increased when foam beads were added. In contrast, the more kaolin added the less water absorption. The thermal conductivity coefficient of concrete blocks was also investigated. The results confirmed that the higher the amount of foam beads or kaolin added, the higher the thermal resistance of concrete blocks. Thermal time-lag behavior was also investigated. The results indicated that concrete block with kaolin took the longest time in heating and took the shortest time in cooling. These properties are good for heat prevention in hot climate regions. These concrete blocks which were developed and tested in this research conform to the Thai Industrial Standard. Finally, it can be concluded that because of its thermal behavior, concrete block with kaolin is a suitable energy-saving concrete block for hot and humid climates."