Invariance structures cause problems

It is understood that if the top end of the desalination of sea sand and reach the scale of coherent contribution can be used to measure buildings. But without the desalination of sea sand is expressly squeeze exercise . Certificate achievements Ministry in September 2004 declared that " to build on the harsh comments with sand RBI " delineated , sand necessary purification Britain at the end reward and punishment ,Concrete batching plant of the requirements before the preparation of concrete . Achievements with sand exercised a kind of sand chloride ion content of not higher than 0.01% , the second category of chloride ion content of not higher than the sand of 0.02% , while the minimum requirement of three types of sand, chloride ion content can not be higher than 0.06%. If the chloride ion content higher than 0.06% , that is failing , not at its cement gravel on miscellaneous confusion like what are invariant structures will cause problems.
China to build a coherent expert at the concrete mix plant over the "Economic Information Daily " reporters hinted risks in its sand is rich in sodium chloride and alkaline , and reinforced around the chloride concentration reaches a critical value, will be born rust . The stainless steel 's life , one becomes thin , hand strength will weaken , tough words are not support even 10 years .