Henan malpractice Construction Engineering Testing Co., Ltd. is a professional testing company, is one of the qualification place in Henan Province since the first detection through examination of business. Business in the Pile qualification qualification, the qualification grade steel, a qualified indoor environment, building energy efficiency testing, subject testing, materials testing, curtain detection, detection of roads and bridges, air defense projects to detect a number of test qualification and testing laboratories. The nature of the bulk material volume (V0) in the natural state of the volume occupied by the material of solid matter (V) and the material inside the pore volume occupied (Vp) components. Internal porosity material can be divided in accordance with the opening wherein open pores and closed pores, closed pores is itself closed pores, open pores of the pores in communication with the outside world. Granular material refers to the structure detection and identification of material has a particle size of the structure detection, as commonly used in engineering sand, gravel, pebbles, etc., the volume of its natural state is called stacking bulk volume (V'0). Its composition includes not only the physical volume of the volume of material, pore volume, also includes the particle-particle void volume between states under accumulation share (Vs. malpractice Henan Construction Engineering Testing Co., Ltd. is a professional testing company, is Henan qualification Since one of the first detection position through business assessment. qualification business scope includes pile qualifications, premium steel qualities, a qualified indoor environment, building energy efficiency testing, subject testing, materials testing, curtain detection, detection of roads and bridges, air defense engineering testing and many test qualification and testing laboratories. material is subjected to repeated freezing and thawing cycles later, the surface will crack, peeling and so on, resulting in weight loss and reduced strength of the material. material to resist the damaging effects of freezing and thawing capability Shear Wall structure detection, its porosity and pore characteristics and water-filled pores within the relevant situation, and by the ability, tensile strength and water resistance of the material deformation characteristics and pore water filling the pores of the material situation of a direct impact resistant material Capacity damaging effects of freezing or compacting absolute minimum porosity material is generally resistant to cold; the interior contains a large number of closed material, spherical, when the gap is small and not water-filled pores, less damaging frost, frost resistance than Good. The higher material strength, toughness, the better, the greater the deformation structure detection unit, resistance to frost damaging effects of the stronger, better frost resistance. In addition, a material having good frost resistance, resistance to change and wet temperature changes and other weathering performance is also strong, so the frost resistance can be used as mineral material durability against environmental physical effects composite indicators. Therefore, the structure in warm regions, in order to resist weathering, the material should also make certain antifreeze requirements. prestressed structural inspection _ Henan malpractice detection (certified) _ structure detection provided by the increasing prevalence of Construction Engineering Testing Co., Ltd. Henan Henan malpractice Construction Engineering Testing Co., Ltd. (www.hnrsjc.cn) (www .rsgcjc.com) is a leader in Zhengzhou, construction, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs in malpractice detected leadership with the staff warmly welcome all walks of life For more information, negotiations to create a better future for the increasing prevalence of detection.