Mechanical properties and ductility behavior of ultra-high performance fiber reinforced concretes: Effect of low water-to-binder ratios and micro glass fibers

This experimental work investigates the mechanical performance and ductility behavior of Ultra-High Performance Fiber Reinforced Concrete (UHPFRC) containing high volume of micro-glass fibers (MGF). The influence of various volume fractions of MGF and two water-to-binder ratios (w/b) are investigated. These w/b ratios are 0.12 and 0.14. Based on these ratios, two groups of UHPFRC mixes were prepared and each group include seven mixes made with 0%, 0.5%, 1%, 1.5%, 2%, 2.5%, and 3% MGF volume dosages. In total fourteen mixes were examined for the mechanical properties such as compressive strength, splitting tensile strength, modulus of elasticity, flexural strength; and the ductility behavior. It was concluded that lower w/b resulted in better mechanical performance. Also, the mixes containing 1.5% to 3% of MGF, resulted in the highest compressive strength reaching up to 160 MPa. Furthermore, the results indicated that no more strength enhancement can be achieved beyond 1.5% MGF

AI-Decision Support System Interface Using Cancer Related Data for Lung Cancer Prognosis

Until the beginning of 2021, lung cancer is known to be the most commoncancer in the world. The disease is common due to factors such as occupationalexposure, smoking and environmental pollution. The early diagnosis andtreatment of the disease is of great importance as well as the prevention ofthe causes that cause the disease. The study was planned to create a webinterface that works with machine learning algorithms to predict prognosisusing lung cancer clinical and gene expression in the GDC data portal

COVID-19 and post-poliomyelitis syndrome: coincidence? = Covid-19 és post-polio szindróma: véletlen egybeesés?

Although severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) is a novel virus, many central and peripheral nervous system manifestations associated with coronavirus disease-19 (COVID-19) infection have been reported. Beyond the neurologic manifestations, we may still have much to learn about the neuropathologic mechanism of SARS-CoV-2 infection. Here we report a case of postpoliomyelitis syndrome (PPS) related to COVID-19 and attempt to predict the possible pathophysiologic mechanism behind this association

Strength and permeability properties of self-compacting concrete with cold bonded fly ash lightweight aggregate

This paper presents the results of an experimental study on the hardened characteristics of the self-compacting concretes made with cold bond fly ash lightweight aggregates. Binary and ternary use of fly ash (FA) and silica fume (SF) blends have been considered in the production of self-compacting cold bonded fly ash lightweight aggregate concretes (SCLWCs). For this, a total of 9 SCLWC mixtures were proportioned having constant water-binder ratio of 0.35 and the total binder content of 550 kg/m(3). The control mixture contained only Portland cement (PC) as the binder while the remaining mixtures having binary and ternary blends of PC, FA, and SF. Properties that include compressive strength and ultrasonic pulse velocity, chloride ion penetration, gas permeability, water absorption by total immersion and by capillary absorption were investigated at two curing ages of 28 and 56 days. Test results have showed that incorporating the mineral admixtures enhanced significantly the permeability characteristics. Moreover, it was observed that the compressive strength of the SCLWCs with SF was much higher than those of the control concrete. (C) 2014 Elsevier Ltd. All rights reserved