以再生建筑混凝土为骨料制备透水砖

Preparation of water permeable brick using recycle building concrete as aggregate

随着城市化进程加快,道路和建筑物拆除产生了大量废旧混凝土,既带来环境污染,又造成资源浪费,将其开发再利用具有明显的环境效益和经济效益.本文将废旧混凝土进行破碎、分级处理成为再生建筑混凝土,并以其为骨料来制备透水砖,研究了级配、骨灰比、水灰比、砂率和养护时间对透水砖性能的影响.结果表明,当骨灰比为5.0,水灰比为0.3,砂率为15%,终养时间为72 h时,所制备的透水砖满足JC/945-2005《透水砖》标准要求.

With the urbanization process accelerating,roads and buildings put-down will cause a great deal of waste concrete.That will not only pollute the environment,but also will bring about the waste of resources.So the exploitation and recycling of waste concrete has obvious environmental and economic benefits.In this paper recycled building concrete was from crushing and grading processing of waste concrete.Water permeable brick was prepared from recycled building concrete as aggregate.The influence of aggregate grading,aggregate cement ratio,water cement ratio,sand ratio and curing time on the properties of water permeable brick was studied.The results show that when aggregate cement ratio is 5.0,water cement ratio is 0.3,sand sand ratio is 15% and curing time is 72 h,the water permeable brick meets the requirement of Chinese standard JC/T 945-2005.