大中城市的下水井盖,多年来都是用铸造生铁制造的。不仅重量大、价格高,而且常常被盗。为此有关单位研制了新的下水井盖。 1.昆明理工大学废物资源化研究所,利用废砂炉渣复合材料研制成功了下水井盖,经测试和使用证明,这种下水井盖的机械性能达到了铸造生铁下水井盖的质量标准,而韧性超过 The manhole covers in large and medium-sized cities have been manufactured from cast iron for many years. Not only are they heavy and expensive, they are often stolen. New sewer covers were developed for this purpose. 1. Kunming University of Science and Technology, Waste Recycling Institute, successfully developed the manhole cover using waste sand slag composites. After testing and use, it proved that the mechanical performance of the manhole cover reached the quality standard of casting pig iron manhole cover, but the toughness exceeded.