The problem of sand resources and utilization~ 海砂资源及利用的问题

    我国东部沿海地区，人口密集，经济发展迅速，工程建设量大。当河砂资源出现供不应求的情况且没有其他砂源替代（如内陆地区可以使用山砂或机制砂等替代）时，从远距离运送河沙，大大的提高了工程造价。参照国外许多国家走过的路，在河沙资源短缺的情况下，人们开始将注意力转向了当地砂源——海砂。因此，沿海地区开采利用海砂是经济发展的客观需要和历史发展的必然，海沙淡化设备也就应运而生。

In the eastern coastal areas of China, the population is dense, the economy is developed, and the construction quantity is large. When there is insufficient supply of river sand resources, there is no alternative to other sand sources (such as inland areas can be used to replace the sand or sand, etc.), long-distance transport river sand will greatly improve the cost of the project. And many foreign countries through the same road, sand land in case of shortage of resources, people began to pay attention to the local sand - sand source. Therefore, the exploitation and utilization of sea sand in coastal areas is an inevitable objective needs and historical development of economic development,Sand desalination equipment came into being.

     英国、丹麦、挪威、瑞典、比利时、加拿大、澳大利亚、新西兰、日本、韩国、土尔其、印度等国家以及我国的台湾地区在海砂(利用海沙淡化设备对海砂进行清洗而达到国家标准规定的海砂)应用于工程建设方面已有多年的历史和丰富的应用经验。尤其是河砂、陆砂资源短缺的日本，在20世纪40年代就已经开始利用海砂配制混凝土，特别是20世纪80年代到90年代，日本海砂的利用量达到历史的高点，海砂占建筑用砂的比例高达30％左右。

Britain, Denmark, Norway, Sweden, Belgium, Canada, Australia, New Zealand, Japan, South Korea, Turkey, India and other countries and China's Taiwan area in the sand used in construction has a long history and rich application experience. Especially, the river sand sand resources shortage in Japan, in 1940s began the preparation of concrete with sand, especially from 1980s to 90s, the Japan Sea sand reached historic highs, the sand for building sand ratio as high as 30%.

     20世纪30～40年代，我国局部地区将海砂用于临时建筑。70年代末，个别沿海城市开始出现使用海砂的建筑结构，但规模较小。对海砂的开采利用在近十多年获得迅速发展。国内较早大规模使用海砂的是宁波舟山地区和深圳地区等。据相关人士实地调研得知，宁波、舟山地区当时的建筑用砂90％以上为海砂。

In twentieth Century 30 to 40s, China's local area will be used for temporary building sand. At the end of 70s, the city began to appear some coastal structures using sea sand, but on a smaller scale. The exploitation of sand is developed rapidly in the past more than and 10 years. The earliest large-scale use of sea sand in Ningbo Zhoushan area and Shenzhen area. According to the author in 2007 before and after the investigation, the architecture of Ningbo, Zhoushan area with more than 90% sand sand.

     海砂含泥量低、粒形优良、细度均匀，适合配制混凝土。然而，海砂含有较高的氯盐、贝壳、轻物质等有害物质。未经净化处理的海砂容易造成混凝土中的钢筋过早锈蚀，给建筑工程埋下严重的质量隐患,所以，未经处理的海沙是豆腐渣工程的根源。国内外因滥用或误用海砂出现了一批“海砂屋”，造成了重大的经济损失和恶劣的社会影响。青州统一重工机械有限公司是一家专业研发生产海沙淡化设备的机械设备厂家。我公司在原有的淡化设备基础上研发生产的新型海沙淡化设备，淡化效果更好，我公司的海沙淡化设备可以将海沙中的氯离子含量降低到0.001%以下，远远高于提出标准的0.06%以下， 且经过当地的质检。
The sand mud content low, grain shape, good fineness, suitable for the preparation of concrete. However, the sand contains high chlorine salt, shells, light material and other harmful substances. Without the purification of sea sand can cause premature corrosion of reinforced concrete, construction project buried serious quality problems. At home and abroad due to abuse or misuse owing to the emergence of a number of "sea sand house", resulting in significant economic losses and bad social impact.So, the untreated sand is the root of bean curd dregs.Qingzhou Heavy Machinery Co. Ltd is a professional manufacturer of machinery and equipment research and production of new sand desalination equipment R & D and production of our company based on the original desalination equipment on desalination desalination equipment better our desalination equipment can be chlorine ion content in the sand of the sea below 0.001% is much higher than the proposed standard below 0.06%. And after the local quality inspection.