Witton Cement Group Co., Ltd. Share: classification of special cement sulphate resisting cement: sulfate corrosion of cement having a higher ability to resist. According to the mineral composition of cement can be divided into sulphate resisting portland cement, slag cement and belite strontium aluminate cement. Size by cement resistance to sulfate attack capability, can be divided into high sulphate resisting cement and sulphate resisting cement. Sulphate resisting Portland cement is the main varieties of sulphate resisting cement, Portland cement clinker by a specific mineral composition, adding the right amount of finely ground gypsum formed. Chinese standards: sulphate resisting Portland cement clinker, tricalcium silicate content of not more than 50%; tricalcium aluminate is not more than 5%; tricalcium aluminate, calcium and iron and aluminum four acid content of not more than 22%; free lime content shall not exceed 1.0%; magnesium content of not more than 4.5%; and sulfur trioxide cement content shall not exceed 2.5%; cement sulphate resistance index, which shall not be less than 0.8 Fb corrosion factor. Sulphate resisting cement applied to sulfate attack as well as by freeze-thaw and wet action harbor engineering, hydraulic engineering and underground engineering. Witton Cement Group Co., Ltd. Share: classification of expansive cement special cement: volume expansion during hardening cement, according to the mineral composition, the Chinese expansion into silicate cement, aluminate cement expansion, sulphoaluminate Class expansive cement and calcium hydroxide expansive cement. Portland cement expansion, alunite expansive cement, iron expansive cement, magnesium cement expansion, K-type expansion are silicate cement expansive cement. Such cement is Portland cement in general, adding a variety of expansion components grinding together. As with alumina cement and gypsum as an expansion component, the amount added to Portland cement, Portland expansive cement can be obtained. Bauxite expansive cement plaster belong aluminate cement expansion, usually mixed with the right amount of alumina cement plaster and lime common ground together. Sulphoaluminate sulphoaluminate expansive cement clinker by adding an appropriate amount of gypsum common ground together. General expansion of the value of smaller cement special cement plant, can be formulated shrinkage compensated mortar and concrete for structural reinforcement, pouring machine base or anchor bolts Shanxi special cement, blockage, leakage repair cracks and holes, and underground structures waterproof layer. Expansion of the value larger cement special cement, also known as self-stressing cement, used in the preparation of reinforced concrete. Since the beginning of the stress in the hardened cement, special cement standards due to a chemical reaction, cement volume expansion, making steel by tensile stress, on the contrary, reinforced by the concrete compressive stress, such pre-stress can increase the carrying capacity of reinforced concrete structures and crack performance. Since the stress of cement, mortar or concrete requires its expansion and deformation since stabilized stress value greater than 2 MPa (1 MPa generally less expansive cement). Since the stress of cement can be divided according to the mineral composition of different silicate cement self-stress, since stress aluminate cement and sulfur aluminate cement since stress. Such cement impermeability good, suitable for the production of various diameters, since stress withstand various hydraulic and pneumatic tubes, such as city water pipes, gas pipes and other oil and gas pipelines. Expansive cement in the hardening process, the cement hydration mineral hydrates generated during crystallization will have a great expansion energy, people use this principle successfully developed a silent broken agent, has been used in concrete structures and rock removal mining, cutting and crushing, etc., with good results. Special Cement | Xinjiang special cement | cement provided by Witton Witton Cement Group LLC. Witton Cement Group Co., Ltd. (www.sxwdgs.com/) strong, credible, Shanxi Yuncheng cement and related products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Witton cement into the brilliant and you work for a better future!