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. Material in the course, will be subject to the natural environment of various factors, its performance decreases, environmental testing, and even destroyed, these damaging effects can be divided into physical, chemical, and biological effects and other effects. Physical effects include dry and wet changes, temperature changes and freezing and thawing and the like. Wet and temperature changes in the material expands and contracts repeatedly can cause the material to crack or even be destroyed. In cold areas, freezing and thawing of the material damage is more serious. Chemical effects include erosion and damage water or gas acid, alkali, salt and other substances to the material. Biological and biochemical effects, Sui indoor environment testing, refers to a material by insects, fungi and other decay and corrosion. When the general mineral materials, such as stone, brick, concrete, etc., exposed to the atmosphere or water level changes in area, mainly physical damage effects occur; when in the water, Zhecheng indoor environment testing, in addition to the physical effects may also occur chemical erosion. Metal materials, causes damage mainly chemical corrosion and electrochemical corrosion effect. Organic material composed of wood and plant fibers, civil indoor environment testing, often due to biological effects is destroyed. 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. Non-active material in the cement mix regulate cement strength grade, saving of the cement clinker, also known as mixed filling material. Such hybrid material, texture are ground into a fine powder solid quartzite, limestone, sandstone; soft texture are clay, loess and the like. Also, who do not meet the technical requirements of granulated blast furnace slag, pozzolana and fly ash mixed material, can be used as non-active mixed material applications. For non-active blended material quality requirements mainly be of sufficient fineness, no or very little cement containing harmful impurities. Environmental testing | Henan malpractice testing | shenqiu indoor environment testing malpractice by Henan Construction Engineering Inspection Limited. Environmental testing | Henan malpractice testing | shenqiu indoor environment testing is the increasing prevalence of Construction Engineering Testing Co., Ltd., Henan (www.hnrsjc.cn) (www.rsgcjc.com) this year introduced a new upgrade, the above picture is for reference only, please call Tel or pictures on this page, for the latest information, contact: Wang Wei.