kara liu

摘要： In recent years, with the rapid development of the infrastructure investment and urbanization, the demand of the national aggregate and artificial sand are also in a period of rapid growth. However, the market is a sword, the gravel industry development not only led to the development of related ind 阅读全文

摘要： when preparing the concrete,we need fine aggregate and coarse aggregate sand,these stone skeleton adn sand provide support for the concrete. With the increase quality,quantity demand of the sand, aggregate in the market , the quality problems arising from the project is becoming more serious than be 阅读全文

摘要： Due to the large mineral resources development and utilization, the available resources continues decrease, the ore mining grade gradually dwindles, as a result, the smelting and subsequent processing of the ore-dressing product quality requirements are increasing. At the same time, human environmen 阅读全文

摘要： We all clearly know that the soaring carbon dioxide emission will lead to the global warming, and global warming is a serious threat to the survival and development of the whole humanity. In fact, in the carbon emissions of urban, 60% comes from the construction of carbon dioxide emissions and const 阅读全文

摘要： In recent years, the qualified natural sand resources are on the less , so the artificial sand gradually became the main source of construction work . Currently, our Beijing Olympic project, Xiaolangdi reservoir Baoquan reservoir, Hongqiqu reservoirs, Gezhouba Tianwan River Power Plant, these key na 阅读全文