After more than 300 sleepless nights
, 24 times of calcination
, 572 times of testing
, 45 people participated in the
innovative research and development to overcome the limitations of high altitude
, cold and anoxic conditions
. The
"high plateau cement"
which is more suitable for the use of the Qinghai-Xizang Plateau
is used for the construction
of various airports
and roads, providing a solid guarantee for the high-quality development of the Xizang economy
. NK13 In recent years, with the great progress made in the development of various social and economic undertakings in Xizang, various infrastructure projects have sprung up. However, due to the high altitude and lack of oxygen in Xizang, the shortage of low-alkali raw materials, especially the large demand for 0 HTML 0 Xizang 4 low-alkali cement 0 HTML 0 UNK1 5 in the airport, all the low-alkali cement used in the airport in Xizang has to be transported from outside the region, which undoubtedly increases the transportation, time and other costs. How to solve this problem? Faced with the market demand and market opportunities, the General Party Branch of Xizang 0 HTML 0 Xizang 6 Qilian Mountain Cement 0 HTML 0 UNK1 7 Company led the establishment of "High Plateau Low Alkali Cement Research and Development Group". 0HTML0 UNK1 is difficult at the beginning! The first difficulty in front of us is the lack of suitable raw materials, the alkali content of limestone is less than 0.2%, and the alkali content of iron correction raw materials is less than 1.0%. 0 HTML0 UNK1 9 In order to find raw materials suitable for the production of low-alkali cement, the R & D personnel carried out a "carpet" search within 500 kilometers of the company to find sialic correction raw materials with alkali content less than 0.7%. After more than three months, the volcanic ash with alkali content meeting the standard was finally found. After repeated tests and theoretical calculations, it can meet the needs of producing low-alkali cement. 0 HTML 0 UNK2 0 Quality inspectors take samples of high-plateau low-alkali cement for research and development 0 HTML 0 UNK2 1 With new raw materials, the second difficulty is how to make a reasonable "formula". Finally, the R & D personnel repeatedly compared and calculated, and finally determined the use of limestone, siliceous slate, volcanic ash, tailings four components of ingredients. 0 HTML 0 UNK2 2 At the beginning of the production of low-alkali cement, from the determination of the scheme to the preparation of materials, from the on-site organization to the optimization of ingredients and the operation of central control, it is undoubtedly "crossing the river by feeling the stones", the difficulty of production process control is unimaginable, facing the large fluctuation of quality indicators and the difficulty of central control operation. It caused many process problems such as preheater collapse, 0 HTML 0 UNK2 3 clinker 0 HTML 0 UNK2 4 agglomeration, etc. R & D personnel carried out thematic discussions for many times to overcome the challenges of clinker calcination, and finally changed the passive situation of production and achieved technological progress and perfection. So far, with indomitable spirit, technicians have completed the research and development of low-alkali cement suitable for the Qinghai-Xizang Plateau, contributing to the high-quality economic development of Xizang. 0 HTML0 Xizang 5 High-plateau low-alkali cement for airport project construction 0 HTML0 UNK2 6 After the successful research and development of high-plateau low-alkali cement, Xizang Qilianshan Company actively strengthened communication and coordination with the Civil Aviation Administration of China and Xizang University. After repeated tests and inspections, the answer given was that all of them met the relevant technical specifications. And each technical index is superior to that of that low-alkali cement in the mainland. From the current trial situation, the cement quality is stable, the construction performance is good, and there is no crack phenomenon, especially the frost resistance and wear resistance are approved by the Civil Aviation Project Department. 0 HTML0 Xizang 7 Subsequently, CAAC and Xizang University carried out the durability test and long-term exposure test of concrete, and the results showed that all the performances were excellent, which was unanimously praised and highly recognized by CAAC. At the same time, the University of Xizang, Northwest Civil Aviation Airport Construction Group Co., Ltd. and Lhasa Gongga Airport Construction Command jointly awarded the "High Plateau Low Alkali Cement Laboratory" to the Xizang Qilian Mountain Company. 0 HTML0 Xizang 8 Today, the high-plateau low-alkali cement produced by Xizang Qilian Mountain Company has been successfully put on the market, filling the gap in the production of high-plateau low-alkali cement in Xizang, enhancing the competitiveness of the company's products in the market, breaking the understanding of the quality of plateau low-alkali cement in key projects, and will play an important role in reducing the construction cost of Xizang Airport. 0HTML0UNK29
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