Testing Rapidcrete HD for Shotcrete Delivery

测试 Rapidcrete HD 喷射混凝土输送

• 批准号: 530136-2018
• 负责人: Commito, Michael
• 金额: $ 1.82万
• 依托单位: Cambrian College
• 依托单位国家: 加拿大
• 项目类别: Applied Research and Development Grants - Level 1
• 财政年份: 2018
• 资助国家: 加拿大
• 起止时间: 2018-01-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=647970
• 关键词: Testing; Rapidcrete; HD; Shotcrete; Delivery

CPD Construction Products currently manufactures a product known as Rapidcrete HD, which is a fast setting,**high strength topping and patching material consisting of specialty pre-blended, high strength, and abrasion**resistant aggregate and rapid setting cement. The problem with this concrete is that, in the underground mining**industry, time is at a premium and production is limited when workers have to mix and pour concrete for mine**tunnel floors. Delivering Rapidcrete HD as sprayable concerete, also known as shotcrete, could provide CPD and**its industry partners with a time-saving solution.**In the mining industry, shotcrete is used as a primary means of ground support by spraying it onto the back and**walls of an underground tunnel; known in the industry as drifts. The force of the spray knocks the air out of the**mixture, making it denser than conventionally poured concrete. Moreover, it is arguable that shotcrete is probably**the most effective method to install concrete that is not only structurally superior but limitless in shape, size and**use.**The challenge confronting CPD is that, while this new aggregate works well when traditionally poured for concrete**floors in factories, warehouses, loading dock areas, cold storage rooms, and approach pads and drifts in the**mining industry, it is unclear how it will work when sprayed on a surface at high velocity. If Rapidcrete HD is**proven viable as a shotcrete product it would open up significant opportunities for CPD in the mining industry.

CPD Construction Products 目前生产一种名为 Rapidcrete HD 的产品，这是一种快速凝固、**高强度的面层和修补材料，由特种预混、高强度、耐磨**骨料和快速凝固水泥组成。这种混凝土的问题在于，在地下采矿**行业中，当工人必须为矿**隧道地面混合和浇筑混凝土时，时间非常宝贵，而且产量有限。以可喷射混凝土（也称为喷浆混凝土）形式提供 Rapidcrete HD 可以为 CPD 及其行业合作伙伴提供节省时间的解决方案。**在采矿业中，喷浆混凝土通过将其喷洒到地下隧道的后壁和**墙壁上，用作地面支撑的主要手段；业内称为漂移。喷射的力量将空气从混合物中排出，使其比传统浇筑的混凝土更致密。此外，可以说，喷射混凝土可能是**最有效的混凝土安装方法，它不仅在结构上优越，而且在形状、尺寸和**用途上不受限制。**CPD 面临的挑战是，虽然这种新型骨料在传统上浇筑在工厂、仓库、装卸码头区域、冷藏室以及**采矿业中的引道垫和巷道的混凝土**地板时效果很好，但它 目前还不清楚它在高速喷射到表面时会如何发挥作用。如果 Rapidcrete HD 作为喷射混凝土产品被证明是可行的，它将为采矿业的 CPD 带来巨大的机遇。