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Novel Wollastonite-modified pervious concrete flooring system for nutrient removal from water runoff

新型硅灰石改性透水混凝土地板系统，用于去除径流中的养分

基本信息

批准号：
461715-2013
负责人：
Nehdi, Moncef
金额：
$ 1.78万
依托单位：
University of Western Ontario
依托单位国家：
加拿大
项目类别：
Engage Grants Program
财政年份：
2013
资助国家：
加拿大
起止时间：
2013-01-01 至 2014-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=542745
关键词：
Novel Wollastonite modified pervious concrete

项目摘要

Agricultural activities, and in particular those associated with animal production facilities, can adversely affect water quality. Pollution in water runoff from these facilities includes sediments, pathogens, and nutrients. Such nutrients in surface waters can be detrimental to most forms of aquatic life, and cause serious health and water quality concerns for neighboring communities. One problem with current operational practices for animal confinement facilities is the use of impervious flooring surfaces such as normal concrete, which increase runoff from these facilities, leading to higher pollutant levels in the surrounding environment. It is believed that pervious concrete incorporating wollastonite additives can be an optimum flooring system for such animal production facilities. Pervious concrete is a highly permeable concrete with a high flow rate for water through its body. On the other hand, wollastonite is a naturally occurring acicular mineral (calcium meta-silicate) that is known to act as an effective medium for nutrients removal. Combining these two features of wollastonite and pervious concrete can lead to a novel flooring system with high efficiency in reducing nutrients concentrates and water runoff, leading to innovation in environmental and waste management practice in animal confinement facilities.

农业活动，特别是与动物生产设施有关的活动，可能对水质产生不利影响。从这些设施流出的水污染包括沉积物、病原体和营养物质。地表水中的这些营养物质可能对大多数水生生物有害，并对邻近社区造成严重的健康和水质问题。目前动物禁闭设施的操作实践存在的一个问题是使用不透水的地板表面，如普通混凝土，这会增加这些设施的径流，导致周围环境中的污染物水平更高。认为掺入硅灰石添加剂的透水混凝土可以成为这类动物生产设施的最佳地板系统。透水混凝土是一种具有高渗透性的混凝土，具有较高的水流速率。另一方面，硅灰石是一种天然存在的针状矿物（偏硅酸钙），是一种有效的营养物去除介质。结合硅灰石和透水混凝土的这两个特点，可以形成一种新型的地板系统，可以高效地减少营养浓缩物和水径流，从而在动物禁闭设施的环境和废物管理实践中实现创新。