نتایج جستجو برای: sulfate attack
تعداد نتایج: 139144 فیلتر نتایج به سال:
Statins are commonly used drugs in the treatment of hyperlipidemia (HL), despite some undesirable side effects. These range from mild symptoms such as myopathy, muscle weakness and myalgia to severe muscle weakness associated with chronic myopathy and acute renal failure (ARF) as a result of rhabdomyolysis. The most serious and deadly side effect of statins is rhabdomyolysis. The case presente...
The problem of internal sulfate attack in concrete is widespread Iraq and neighboring countries.This because the high content usually present sand gravel used it. In study total effective was to calculate optimum SO3 content. Regression models were developed based on linear regression analysis predict referred as (O.G.C) concrete. data separated 155 for development 37 checking models. Eight bui...
We present two multiscale reaction-diffusion (RD) systems modeling sulfate attack in concrete structures (here: sewer pipes). The systems are posed on two different spatially separated scales. The only difference between them is the choice of the micro-macro transmission condition. We explore numerically the way the macroscopic Biot number Bi connects the two reactiondiffusion scenarios. We ind...
X-ray microtomography can be used to generate three-dimensional 5123 images of random materials at a resolution of a few micrometers per voxel. This technique has been used to obtain an image of an ASTM C109 mortar sample that had been exposed to a sodium sulfate solution. The three-dimensional image clearly shows sand grains, cement paste, air voids, cracks, and needle-like trystah growing in ...
how to cite this article: akhondian j, ashrafzadeh f, beiraghi toosi m, hashemi n. a rare presentation of neurobrucellosis in a child with recurrent transient ischemic attacks and pseudotumor cerebri (a case report and review of literature). iran j child neurol. 2014 spring; 8(2):65-69. brucellosis is a multi-system infectious disease that presents with various manifestations and complication...
For many years, lightweight concretes (LWC) have been utilized successfully in the construction of buildings because their low specific weight, high thermal insulation capacity, and sound insulation. The development that led to self-compacting concrete (LWSCC) is a significant step forward recent years. These chains concrete's beneficial properties with concrete. purpose this experimental inves...
In this paper, the security of a distance bounding protocol is analyzed which has been recently proposed by Jannati and Falahati (so-called JF). We prove that an adversary can recover key bits of JF protocol with probability of “1” while the complexity of attack is “2n” runs of protocol. In addition, we propose an improved protocol and prove that the improved protocol is resistant to mafia frau...
Reinforced concrete structures exposed to aggressive environments often require repair or retrofit even though they were designed to last >50 years. This statement is especially true for structures subjected to sulfate attack. It is critical that fundamental models of life prediction be developed for durability of concrete. Based on experimental results obtained over a 40-year period, scaling a...
The damage evolution of concrete subjected to drying-wetting cycles in different concentration of sodium sulfate solution was investigated based on micro and macro-observations. Through the experiment, weight loss, compressive strength loss and the damage layer thickness of concrete were measured after different drying-wetting cycles. The mechanical properties degradation in the damage layer of...
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