The invention relates to a mix proportion design method of cement recycled waste lime and fly ash stabilized macadam, belonging to the field of traffic civil engineering. Firstly, the physical and mechanical properties of the two kinds of old aggregates were evaluated respectively, and it was found that the density of the coarse aggregates was smaller, and the crushing value was larger; the fineness modulus of the fine aggregates was larger, and the water absorption rate was higher; secondly, according to the performance requirements and gradation requirements of the coarse and fine aggregates in the specifications, the road grades suitable for different grades of old aggregates were determined. And traffic conditions. The test method includes the following main steps: 1) grading design of cement stabilized waste base materials; 2) determining the optimum moisture content and maximum dry density; 3) determining the water content and filling content according to the optimum moisture content and maximum dry density; forming cylindrical specimens, measuring 7-day unconfined compressive strength, 7-day splitting strength and 7-day compressive recovery strength Elastic modulus; 4) evaluation of the cracking resistance and abrasion resistance of the mixture. Therefore, the invention has obvious economic and social benefits.
【技术实现步骤摘要】
一种水泥再生废旧石灰、粉煤灰稳定碎石的配合比设计方法
本专利技术属于工程材料
,具体涉及一种水泥再生废旧石灰、粉煤灰稳定碎石的配合比设计方法。
技术介绍
为了提高路面强度满足重载交通同时尽可能地节省造价,在“强基薄面”理论的指导下,很多高速公路都采用了半刚性基层材料。按照高速公路15年、20年设计寿命,在现在和未来的很长一段时间内,将会有越来越多的高速公路进入大修、中修阶段。在重载、超载和飞速增长的交通流作用下,很多高速公路的半刚性基层都发生了损坏,在大修过程中需要将基层铣刨挖除铺筑新基层。水泥稳定碎石和二灰稳定碎石作为应用最广泛的两种半刚性基层材料具有强度高、刚度大、成板体、水稳定性好的优点,在近20年得到广泛应用,因此铣刨的半刚性基层材料中也以水泥稳定碎石和二灰稳定碎石旧料最多。这些铣刨的废旧基层材料体量大,运输成本高,占用大量的土地资源,如果不及时得到处理,还会造成周边环境污染。由于矿料资源开采严重破坏生态环境,北京市已经发布《关于不再审批成立料场的通告》,自2014年起,北京市工商局将不再发放料场的营业许可执照,可以预见在未来的公路和城市道路建设、维 ...
【技术保护点】
1.一种水泥再生废旧石灰、粉煤灰稳定碎石的配合比设计方法,其特征是:将废旧石灰、粉煤灰碎石进行筛分,根据《公路路面基层施工技术细则》(JTG/T F20‑2015)中推荐的级配,运用规划求解进行级配设计。
【技术特征摘要】
1.一种水泥再生废旧石灰、粉煤灰稳定碎石的配合比设计方法,其特征是:将废旧石灰、粉煤灰碎石进行筛分,根据《公路路面基层施工技术细则》(JTG/TF20-2015)中推荐的级配,运用规划求解进行级配设计。2.根据权利要求说明所述一种水泥再生废旧石灰、粉煤灰稳定碎石的配合比设计方法,其操作步骤为:[001]对二灰...
【专利技术属性】
技术研发人员:徐世法,索智,俞轩,许鹰,
申请(专利权)人:北京建筑大学,
类型:发明
国别省市:北京,11
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