![<?echo $_SERVER['SERVER_NAME'];?>](/template/twentyseventeen/skin/images/header.jpg)
Concrete-filled steel tube refers to the structural members that are formed by filling concrete in steel tubes and the steel tubes and their core concrete can jointly bear external loads. According to different cross sections, they can be divided into round steel tube concrete, square, rectangular steel tube concrete and polygonal steel tube concrete, etc. .
In the concrete-filled steel tube column, the confinement effect of the steel tube on its internal concrete makes the concrete in the three-direction compressive state, which improves the compressive strength of the concrete. The concrete inside the steel tube can effectively prevent local buckling of the steel tube. Studies have shown that the bearing capacity of concrete-filled steel tubular columns is higher than the sum of the corresponding bearing capacity of steel tubular columns and the bearing capacity of concrete columns. The interaction between the steel pipe and the concrete causes the failure of the concrete inside the steel pipe to change from brittle failure to plastic failure. The ductility of the component is obviously improved, the energy dissipation capacity is greatly improved, and the seismic performance is superior.
Plasticity refers to the plastic deformation ability under static load. The axial compression test of the short column of concrete-filled steel tube shows that when the specimen is compressed to 2/3 of the original length and the longitudinal strain is more than 30%, the specimen still has bearing capacity. After peeling off the steel pipe, although the internal concrete has a large bulge and fold, it remains intact, not loose, and still has about 5% of the bearing capacity. It is crushed and shed after being hammered with a hammer. Seismic performance refers to good ductility and energy absorption under dynamic load or earthquake. In this regard, concrete-filled steel tubular members are much stronger than reinforced concrete members. The hysteresis curve of bending moment curvature under cyclic bending loads indicates that the energy absorption performance of the structure is particularly good, no stiffness is degraded, and there is no falling section, which is the same as the steel column without losing local stability, but in some buildings, Steel columns often use very thick steel plates to ensure local stability. However, local stability is also lost after plastic bending. Therefore, the seismic behavior of concrete-filled steel tubular columns is also superior to that of steel columns.
Sea Salt
Sea salt is the name given to salt extracted through seawater. We collect sea salt by moving the brine (seawater) into PVC-floored salt evaporation ponds, and extracting salt from the evaporite. The hot and dry climate of Pakistan allows us to evaporate water from the brine solely through solar energy. The extracted salt contains numerous impurities, and must first by purified. We can provide sea salt processed for a number of uses, including the following:
Edible Grade Salt
Food Grade Salt produced from sea salt gives a slightly different taste than Table Salt produced from Rock Salt, and is believed to be better from ordinary table salt in taste and texture. It can serve as a good substitute to regular table salt because, although it lacks sufficient iodine, it contains several other healthy minerals not found in table salt, including potassium, magnesium, calcium, and sulfate. We produce an A+ Food Grade Sea Salt was human consumption.
Industrial Grade Salt
Sea salt has hundreds of industrial applications. It is very
widely used in chemical
industries, for example, the Chlor-Alkali
industry, which uses chiefly
salt to manufacture chlorine
and caustic soda. Chlorine and caustic
soda are used further in the manufacture of paper. It is also used as a water softener. Soft water can more economically use soap and detergent, and is therefore ideal for cleansing purposes. Rubber manufacturers use salt to
separate rubber from latex. It is used in the metal industry to remove impurities from metal. We produce A
and B Grade Sea Salts for such industrial uses.
Another major use of salt is de-icing, removing ice from
a surface. Although rock salt is the more common type of salt for this purpose,
sea salt is also perfectly suited to perform the task. This works by spreading
diluted salt over the frozen surface. Since salt water has a lower freezing point than pure
water, ice melts away as
soon as it absorbs salt. We produce a C Grade Sea Salt for de-icing purposes.
Bath Salts
Various kinds of sea salts can serve as bathing additives, and are believed to possess healing and therapeutic properties. Water softeners can also be used as additives to a bath, which creates lather of better quality. They can reduce the "wrinkling" effect of prolonged exposure to water. Bathing with bath salts can prove a very relaxing experience.
Sea Salt
Sea Salt,Coarse Sea Salt,Refined Sea Salt,Natural Sea Salt
Weifang Xinchang Chemical Co.,Ltd , http://www.xinchangchem.com