Concrete test instrument concrete saw blades can be traced back ancient times, Zhengzhou standard curing box, they use the gel as clay, lime, gypsum, volcanic ash. Since the 1820s there have been Portland concrete test equipment, the standard curing, since the use it has formulated into concrete projects needed for strength and durability, Zhengzhou latest standard curing room, and raw materials, low cost, especially for low energy consumption, and therefore extremely versatile (see inorganic cementitious materials). Early 20th century, was made a water-cement ratio and other theories, initially laid the theoretical foundation of concrete strength. Later, she has appeared in lightweight aggregate concrete, aerated concrete and other concrete, have begun to use a variety of concrete admixtures. Since the 1960s, it is widely used reducing agent, Zhengzhou latest standard curing box, and the emergence of superplasticizer and the corresponding flowing concrete; polymer materials enter the field of concrete, polymer concrete emerged; a plurality of fibers are used for dispersion fiber concrete reinforcement. Modern testing technology is also increasingly used in materials science of concrete. Concrete - according to the type of concrete cementitious material points are: ① inorganic cementitious materials of concrete, such as concrete, gypsum concrete, silicate concrete, water glass concrete; ② organic binder concrete, such as concrete, polymer concrete . By density points are: ① heavy concrete, bulk density 2600 - 5500 kg / m or greater; ② ordinary concrete, bulk density of about 2400 kg / cubic meter; ③ light concrete, bulk density of 500 to 1900 kg / m3 lightweight aggregate concrete, porous concrete, macroporous concrete. Operation concrete test instrument to use is very important, if errors in operation will give you cause unnecessary trouble, as well as strict control of the use of its unique structure, twin concrete test equipment with high mixing efficiency, more uniform mixing thereof, Stripper cleaner and so on. Here there are a few steps to use concrete testing equipment: for construction-related scientific research, design departments and laboratories and construction unit used to measure the deformation of shrinkage and expansion of concrete. Shrinkage of concrete expansion instrument from the base, positioning column, adjustable column, dial indicator, par and so on. 1, the base for the steel unit, for receiving the test block with concrete. 2, positioning column for par and concrete brick probe on the left side of the vertical and horizontal spacing. 3, adjustable column, its commercial port there are three pre-installed through holes dial indicator dial indicator positioning and help set screws. Three through holes, respectively, from the base plane 50mm, 75mm, 100mm 50mm from the base plane of the hole, for measuring 100 × 100 × 515 specifications of the concrete test block; 75mm from the base plane of the hole, for measuring 150 × 150 × 515 specifications of concrete brick (due tryout specification only 150 × 150 × 600, should Proposed Use tryout shorten pieces so concrete brick forming size becomes 150 × 150 × 515). 4, par, as a baseline length of the instrument. The factory has been installed on par par shelf, do not free entry, so as not to affect the degree of accuracy par Center. 50,75100 words each side of par, showing where on the base as a reference surface, the high standard rush Center 9 are 50mm, 75mm, 100mm. Henan standard curing box, standard maintenance, Henan Xin Yi Jia from Henan Xin Yi Jia Equipment Limited. Henan Xin Yi Jia Equipment Co., Ltd. (www.hnxinyijia.com) strong, credible, in Zhengzhou, Henan Experimental Instrument industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Henan Xin Yi Jia into the brilliant and you work for a better future!