Although elevated temperature curing can increase the compressive strength of alkali-activated mortar, its field applications are still limited. In this study, mortars were prepared using high calcium fly ash (FA) as a precursor. Small amounts silica fume used to partially replace at 3–9% by weight mortar. All mixtures had liquid binder ratio 0.60 and sand 2.75 weight. A NaOH Na2SiO3 solution w...

The concrete structure in the coastal area suffers from combined erosion of sulfate and dry–wet cycles. In this study, order to modify ordinary concrete, fly ash, slag powder, silica fume polyester fiber are added separately. crack resistance was studied through mechanical performance test three-point bending fracture notched beam under load-crack opening displacement (P-CMOD) curve characteris...

our aim was to report techniques and our experience in one-stage angioplasty and stenting of ostium of left common carotid and left internal carotid arteries in an octogenarian man with transient ischemic attack, who was completely recovered from neurologic insults short time after the procedure. an 81-year-old man presented with a transient ischemic attack. neurologic examination showed left s...

Unfractionated heparin (UFH) is the most widely used injectable medication in the United States. UFH is a poly-dispersed, relatively impure combination of many polysaccharides known as a glycosaminoglycan. It is used as the primary anticoagulant for heart surgery as well as for active treatment of deep venous thrombosis, vascular thrombosis, stroke, and many other potentially catastrophic clott...

The construction industry’s high demand for natural resources, combined with the waste generated by agriculture, creates an opportunity circular economy. This experiment used CaCO3 found in scallop shells as ingredient manufacture of fire-resistant materials, replacing gypsum compositions 40% and 50% weight. mechanical compressive strength was estimated both freeze-thaw cycles acid sulfate atta...

To address the problem of chloride ion transport in cement concrete marine environment, this study investigates effect metakaolin dosage on diffusion resistance mortar and its mechanism by testing binding capacity microstructure under coupling chlorine salt-sulfate-carbonation multiple factors. The results show that sulfate or carbonation reduces to some extent compared with single salt attack,...

Concrete with gangue which made with ordinary Portland cement at different water binder ratio (0.35, 0.40 and 0.45) or ordinary Portland cement at water binder ratio of 0.35 incorporating 10% fly ash or 20% fly ash; 20% fly ash and 1% early strength agent, slag with the replacement of 15% or 30%, or 15% fly ash and 15% slag were made and exposed to a wetting–drying sulfate environment. The comp...