基于PLC的破碎机控制系统设计

我国经济正在飞速发展,行业快速发展的同时也产生了大量的生产废料。破碎是废料回收的第一步,如何实现高效率、高质量破碎是一个重要课题。文章针对实际工厂的运行环境和具体需求,设计了一种基于PLC的破碎机控制系统,可实现现场电柜按钮、无线遥控以及HMI人机交互界面3种控制方式,具备进料速度调节、故障显示以及故障处理功能。此系统在生产现场可以安全稳定运行,达到较好的控制效果。

掺加旧路沥青混凝土粒料水泥稳定级配碎石基层施工

针对旧路改造工程沥青路面结构层破除后,如果不进行再利用,废料弃除,造成环境污染,为解决资源浪费,将旧路沥青混凝土块料利用碎石机进行二次加工,在水泥稳定土拌和站上增加一个冷料仓,专门掺加旧路沥青混凝土破碎混合料,掺加到基层混合料中,做为基层材料再利用,避免固体废弃物污染环境同时,减少碎石材料生产,保护环境,降低工程成本。

掺加旧路沥青混凝土粒料水泥稳定级配碎石基层施工解析

旧路改造工程沥青路面结构层在被破除之后如果没有进行有效利用,废弃的材料往往会对周围环境造成污染。为了能够减少这类污染的出现需要使用碎石机对旧路沥青混凝土块料进行二次加工处理,并将从而节省旧路改造工程的材料,降低工程建设成本。

Water Retention Curve and Particle Breakage of Aggregates Recycled from Demolition Waste

CDW （construction and demolition wastes） present a high amount of aggregate chips covered with mortar. This results in high absorption of water with a direct impact in particle breakage or disaggregation. It is supposed that intra particle suction plays an important role in this phenomenon. However, WRCs （water retention curves） of CDW are not well understood. In this work, the WRCs of dynamically compacted specimens of aggregates recycled from the demolition of the National Stadium in Brasilia are studied. The objective of this study is to obtain WRCs of the recycled materials by using the pressure plate and filter paper methods. The breaking effect during compaction is quantified from the grain size distribution curves. The particle breakage during compaction increases when the energy is augmented. The results from the WRCs were incorporated into a pore size capillary model to predict pore size distribution.