Use of novel admixtures to enhance cemented paste backfill performance

使用新型外加剂增强水泥浆回填性能

• 批准号: 486641-2015
• 负责人: Fall, Mamadou
• 金额: $ 1.82万
• 依托单位: University of Ottawa
• 依托单位国家: 加拿大
• 项目类别: Engage Grants Program
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=585717
• 关键词: Use; novel; admixtures; enhance; cemented

Canada is one of the largest mining nations in the world. However, the mining industry produces a large quantity of mine waste, especially mainly tailings. Public perception and strict government regulations with regards to the surface disposal of such tailings compel the mining industry to develop new strategies which are environmentally sound and cost effective. One of the most successful strategies is the development of cemented paste backfill (CPB) technology. CPB consists of a mixture of tailings, binders and water. The key function of CPB is the mechanical stabilization of underground mine openings and disposal of tailings, resulting in substantial economic benefit for the mining industry. One of the highest priorities in the mine backfill technology is the development of cheap and excellent additive materials to reduce the cost of CPB (mainly controlled by the cement consumption), improve its flow ability, improve its early age strength increase rate (i.e speed up mining cycle), decrease its early age pore pressure (i.e. reduce load on barricade and increase liquefaction resistance), while maintaining or improving other performance properties (e.g., environmental behaviour), in order to develop high performance CPB. To achieve the aforementioned goal, the company, BASF Canada, one of the world leaders in production and marketing of chemical admixtures, is developing collaboration with Dr. Fall from the University of Ottawa, an expert in CPB, to make the development of high performance CPB by using MasterRoc MineFill Admixtures as a possibility. BASF Canada has patented novel admixtures, formulated for mine backfill applications, which could significantly improve the performance (e.g., flow ability, early age strength increase rate, cost, early age pore pressure) of CPB.The development of the technology of high performance CPB will open the lucrative and vast market of mine tailings backfill to the BASF Canada's admixtures, and thus offer interesting business opportunities to BASF Canada at both national and international level.

加拿大是世界上最大的矿业国家之一。然而，采矿业产生大量的矿山废物，特别是主要是尾矿。公众的看法和严格的政府法规，关于表面处置这种尾矿迫使采矿业制定新的战略，这是环保和成本效益。其中最成功的策略之一是水泥净浆充填（CPB）技术的发展。CPB由尾矿、粘合剂和水的混合物组成。CPB的主要功能是机械稳定地下矿山开口和处理尾矿，为采矿业带来巨大的经济效益。矿井里最重要的工作之一 回填技术是开发廉价而优良的添加剂材料，以降低CPB的成本（主要由水泥消耗量控制），改善其流动性，提高其早期强度增长率（即加快开采周期），降低其早期孔隙压力（即减少挡墙上的载荷和增加抗液化性），同时保持或改善其他性能（例如，环境行为），以开发高性能的CPB。为了实现上述目标，巴斯夫加拿大公司，在生产和销售化学外加剂的世界领导者之一，正在发展与来自渥太华大学的教授，在CPB的专家，瀑布合作，使 通过使用MasterRoc MineFill外加剂开发高性能CPB。巴斯夫加拿大公司已获得专利的新型外加剂，配制用于矿山回填应用，可以显着提高性能（例如，高性能CPB技术的发展将为巴斯夫加拿大公司的掺合料打开一个利润丰厚的广阔的尾矿回填市场，从而为巴斯夫加拿大公司在国内和国际上提供令人感兴趣的商机。