نتایج جستجو برای: Building stone
تعداد نتایج: 240932 فیلتر نتایج به سال:
due to their widespread availability, sandstones are commonly used as a natural stone for buildings, monuments and sculptures. in thecurrent study, nine sandstone samples from the upper red formation (specified by the letters a, b, c, cg, s, s1, sh, tr and min)were studied from a petrophysical point of view and their durability was evaluated. then, their suitability as building stones wasassess...
the microscopic and geomechanical properties of igneous building stones include the level of alteration, presence of micro cracks, peak strength, porosity, proportion of detrimental minerals, etc. porosity is reportedly of a devastating impact on the peak strength of igneous rocks. the quartz diorite rock samples in this study were selected from five quarries in natanz, iran and subject to micr...
salt crystallization is one of the most important weathering agents and may limit the durability of building stones. salt crystallization induces stresses inside the pores of stones. consequently, stone durability is closely related to its physical properties and strength. the purpose of this study was to propose a statistical model for estimating stone durability against salt crystallization c...
The western iwan of the Takht-e Soleymān is one of the most important buildings in this area. Based on some accounts, this iwan was constructed during the Sāssānid period and the Ilkhanate kings restored it after 700 years. This unique structure is statically unstable and needs strengthening. To this end, becoming familiar with the building materials and their use in this structure are importan...
Salt crystallization is one of the most important weathering agents and may limit the durability of building stones. Salt crystallization induces stresses inside the pores of stones. Consequently, stone durability is closely related to its physical properties and strength. The purpose of this study was to propose a statistical model for estimating stone durability against salt crystallization c...
among the low–dimensional allotropes of carbon, nanotubes and graphene have attracted very much attention from nano–science and nanotechnology specialists. they have been proposed as building blocks in nanometer device engineering. however, these structures are not defect–free. in this thesis, we focused on defective carbon nanotubes and graphene, and studied the effect of couple of very common...
The western iwan of the Takht-e Soleymān is one of the most important buildings in this area. Based on some accounts, this iwan was constructed during the Sāssānid period and the Ilkhanate kings restored it after 700 years. This unique structure is statically unstable and needs strengthening. To this end, becoming familiar with the building materials and their use in this structure are importan...
Management of solid wastes is considered as an economic and environmental issue in the building stone industry. The current study uses raw and calcined calcareous sludge, generated in the stone cutting factories, in order to remove sulfur dioxide. Sludge characterization has been performed, using X-ray fluorescence (XRF), X-ray diffraction (XRD), scanning electron microscopy (SEM), and energy-d...
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