نتایج جستجو برای: compressive strength

تعداد نتایج: 220045  

Journal: :international journal of civil engineering 0
a. allahverdi narmak 16846-13114, tehran, iran b. shaverdi narmak 16846-13114, tehran, iran e. najafi kani narmak 16846-13114, tehran, iran

:the aim of this work is to investigate the influence of sodium oxide on properties of fresh and hardened paste of alkali-activated blast furnace slag from isfahan steel plant. the silica modulus (sio2/na2o) of activator was adjusted at 0.6 and a number of mixes were designed in such a way to contain different levels of sodium oxide including 1, 2, 3, 4, 5, and 6% by weight of dry slag. the mos...

Journal: :international journal of civil engineering 0
m. mazloom civil engineering department

according to the iranian code of practice for seismic resistant design of buildings, soft storey phenomenon happens in a storey when the lateral stiffness of the storey is lower than 70% of the stiffness of the upper storey, or if it is lower than 80% of the average stiffness of the three upper stories. in the combined structural systems containing moment frames and shear walls, it is possible ...

Journal: :journal of petroleum science and technology 2015
yaser pourmazaheri hamid soltanian

the design of cement slurry for horizontal wellbores is challenging as it must present very high quality cement slurry properties e.g. zero free water, less than 50 cc api fluid loss value, appropriate rheology and yield point for effective displacement, adequate compressive strength, which is critical for lightweight slurries, and finally stable cement column behind casing. the main objective ...

Journal: :آب و خاک 0
مهدی دریائی سید محمود کاشفی پور

abstract due to the importance of using clay soil in many constructive projects such as, road foundation, irrigation canals and related hydraulic structures and etc., improvement of the physical and mechanical soil properties has been the main interest of the geo-technique specialists for years. in this regard different methods such as mixing clay soil with lime or cement have been used. it has...

Journal: :iranian journal of medical physics 0
ahad zeinali ph.d. student in medical physics, tarbiat modares university, tehran, iran bijan hashemi associate professor, medical physics dept., tarbiat modares university, tehran, iran shahram akhlaghpoor associate professor, radiology dept., faculty of medicine, tehran university, tehran, iran majid mirzaei associate professor, mechanical engineering dept., tarbiat modares university, tehran, iran seyed majid nazemi m.sc. student in mechanical engineering, tarbiat modares university, tehran, iran

introduction: because of the importance of vertebral compressive fracture (vcf) role in increasing the patients’ death rate and reducing their quality of life, many studies have been conducted for a noninvasive prediction of vertebral compressive strength based on bone mineral density (bmd) determination and recently finite element analysis. in this study, qct-voxel based nonlinear finite eleme...

Journal: :iranian endodontic journal 0
fereshte sobhnamayan safoora sahebi shiraz dental school ali alborzi saeed ghorbani shiraz dental school nooshin sadat shojaee

introduction: the aim of this study was to evaluate the compressive strength of calcium-enriched mixture (cem) cement in contact with acidic, neutral and alkaline ph values. methods and materials: the cement was mixed according to the manufacturer’s instructions, it was then condensed into fourteen split molds with five 4×6 mm holes. the specimens were randomly divided into 7 groups ( n =10) an...

Journal: :تحقیقات آب و خاک ایران 0
مژده لاهوری پردیس کشاورزی و منابع طبیعی دانشگاه تهران محمود بابالار دانشکده کشاورزی و منابع طبیعی دانشگاه تهران علی رئیسی استبرق university of tehran صادق رنجبری پردیس کشاورزی و منابع طبیعی دانشگاه تهران

in this research the effect of randomly reinforced soil and soil cement with different percent of cement and fiber and different length of fiber was investigated. samples were prepared according to the maximum dry unit weight and optimum water content due to the corresponding compaction curves. compressive and tensile strength were conducted on samples for different curing times. regression equ...

Journal: :Journal of the Fuel Society of Japan 1968

Journal: :Science 1999
Rao Sánchez-Herencia Beltz McMeeking Lange

Thin compressive layers within a laminar ceramic arrest large cracks (surface and internal) and produce a threshold strength. This phenomenon increases the damage tolerance of ceramics and will allow engineers to design reliable ceramic components for structural applications. The stress intensity factor derived for a crack sandwiched between two compressive layers suggests that the threshold st...

Journal: :journal of mining and environment 2014
s. hadi hosseini mohammad ataie hamid aghababaie

in this paper, after collecting the rock samples from eight mines and one high way slope, the tests for determination of dry density, uniaxial compressive strength, tensile strength (brazilian test), elastic modulus, schmidt hammer rebound number have been done on samples. in addition, in order to calculating the mean size of rock grains, quartz content, hardness and abrasivity, a thin sections...

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