石棉

什么是石棉?

石棉 is a generic term for six different naturally occurring mineral formations which have the common characteristic of their crystalline structure being able to 被分离成细长的纤维. The fibers can be curved (serpentine asbestos, or chrysotile) or straight, "needle-like" fibers (the amphiboles). 温石棉是 most common type of asbestos 在美国 and has been mined in various locations 在美国. 石棉 fibers are present in the air throughout the United 州. This is partly due to fibers broken from exposed asbestos containing rocks, but more has been released from asbestos containing products, such as vehicle brakes.

石棉 was called the "miracle mineral" due to its many unique physical properties. 石棉 was added to many building materials because of its ability to retard fire, strengthen products, and acoustically insulate.

石棉 use in building materials peaked in the years following World War II through 1970年的. 石棉 may still be found in new buildings. 石棉目前受规管 by the Occupational Safety and Health Administration (OSHA), the EPA, and other government 机构.

石棉有害吗??

It is the unique physical shape of asbestos that gave it many practical applications 也使石棉变得危险. 石棉 is harmful if the fibers become airborne 被吸入. Fibrous asbestos can fracture into fibers small enough that they can penetrate deep into the lungs, where they can interact with the body to cause 癌症或其他疾病. 石棉 Containing Materials (ACM) that are intact and in good condition are not hazardous to building occupants under normal conditions.

石棉如何伤害你?

Microscopically small asbestos fibers can be inhaled deep into the lungs and lodge 在那里. After many years, lung cancer or mesothelioma (cancer of the mesothelium) may 开发. If you inhale large quantities of asbestos over several years, you could 开发 asbestosis which progressively makes breathing more difficult, or 开发 pleural plaques which make it difficult to evaluate lung x-rays. 如果你囫囵吞枣 amounts of asbestos, some studies show 在那里 may be an increased risk of 开发ing cancers in different organs associated with the throat and gastro-intestinal tract.

石棉不是几年前就被禁止了吗?

Only a few asbestos products are actually banned 在美国. 你仍然可以 容易买到许多石棉产品. The University is minimizing procurement of asbestos 产品尽可能多. However, we cannot guarantee that new building materials 校园里是“无石棉”的." Items purchased or installed before 1980, most likely 含石棉.

How Can I Tell If Something Contains 石棉?

It is not possible to visually determine if a material contains asbestos. 存在 of asbestos can only be determined by specific sampling and analytical procedures 由有资质的人士进行.

石棉有什么好处?

Due to their mineralogical properties of having high strength, being an excellent insulator for heat and electricity, being able to resist heat without damage, being fairly good at resisting corrosion, and also having the ability to be woven into fabric, asbestos has been added to many different materials commonly used in buildings and 不同的产品. It can be found in literally thousands of types of products from building fireproofing to hand-held hair dryers.

大学里有石棉吗?

是的. 石棉 was used during the construction of buildings throughout 1970年的 之前,. Many buildings on campus are known to have asbestos-containing building 材料物理状况良好. Hundreds of asbestos removal projects have been conducted at the University in conjunction with remodeling and demolition activities. As long as ACM remains on campus, the University will monitor the condition and safe 清除石棉.

How is the University Managing 石棉 on Campus?

The University is taking several steps to ensure a safe and healthy work and academic 环境. The University maintains a historical database of asbestos samples collected. A few years ago, a survey was conducted on nearly every building on campus to determine what building materials in those buildings 含石棉. 只有持牌石棉 abatement contractors are authorized to perform asbestos abatement at the University. All areas are evaluated prior to any remodeling or construction activities that may 破坏现有的建筑材料.

Also, University maintenance staff receive asbestos awareness training to be knowledgeable in proper practices to use when working around asbestos-containing materials.

What Should I Do about 石棉 on Campus?

• You should be aware of the fact that 在那里 is still asbestos present, and may be found 在你占据的大楼里.

• You should be aware that if asbestos is intact and in good condition and you do not break it loose from the surrounding material, asbestos fibers will not be released 进入你可以吸入的空气中.

• Refrain from damaging floors, walls, and ceilings 里面可能含有石棉.

• Do not rip items off walls or rip up carpeting since they can be glued with adhesive 里面可能含有石棉.

• If you notice damaged floor tile, walls, ceilings, or pipe insulation, inform the 用于维修的365bet物理设备.