The importance of sand and gravel aggregate The qualified high-quality sand and gravel aggregate is an important foundation to ensure the stable development of China s national economy Beginning from last year, the development of bulk cement became an important way of efficient and modern building; under the strong call of the country, the provinces develop the bulk cement production, at the same time, the concrete mixing plant has become an important means to improve the rate of bulk cement. Normal production of concrete mixing plant cannot be separated from the supply of sand and gravel aggregate, and therefore, the production of high-quality sand and gravel aggregate is an important foundation to ensure the stable development of China s national economy. Newcastle University addresses the importance of the matter here. In recent years, the huge demand for making artificial sand increasingly depleted and national infrastructure construction aggregate gravel production industry becomes a profitable blue chip stocks in the building materials market, coupled with our rich rocks resources supplying ample raw materials, the production of artificial sand quarry is in full swing. However, as the market continues to heat up, the production also appears some problems, such as sand and gravel crushing equipment lies behind, serious waste of resources, gravel gradation does not meet national standards, and they all bring great obstacles for the high speed development of the sand and gravel industry. The construction industry is an important industry in the development of our national economy, and sand and gravel aggregate is one of the main raw materials to promote the sustainable development of the construction industry, therefore, qualified stone production line plays an integral role for the construction of various undertakings in China. So with state-of-the-art equipment and the scientific process, our gravel industry will achieve a new round of large-scale development..