Recycled aggregate (RA) acknowledge with its inferior quality due to high water absorption and lower strength which is mainly due to presence of attached adherent mortar. Concrete made with RA have lower strength and durability properties when compared with natural aggregate concrete (NAC), recorded by many previous researches in past. In order to overcome these difficulties, two‐stage mixing approach (TSMA) is a good tool to improve the properties of recycled aggregate concrete when compared with normal mixing approach (NMA). The main objective of present research work is to study the influence of mixing approaches on concrete made with treated recycled aggregate (TRA). Basically the workability, mechanical and durability properties of concrete have been studied at fresh and hardened state. In this work, four different types of mixing approaches (viz. NMA, TSMA, TSMA1, and TSMA2) were used. In all types of mixing approaches, the natural aggregate was replaced with TRA at different replacement levels viz.: 0, 25, 50, 75, and 100% in a control mix of M40 grade. Based on the experimental results the workability, strength, and durability properties of concrete made with TRA were improved in TSMA2 when compared with all other mixing approaches.

中文翻译：

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混合方式对处理过的再生骨料混凝土强度和耐久性能的影响

再生骨料（RA）的质量差是因为其高吸水率和较低的强度，这主要归因于附着的砂浆的存在。由RA制成的混凝土与天然骨料混凝土（NAC）相比具有较低的强度和耐久性能，这是过去许多先前研究所记录的。为了克服这些困难，与常规搅拌法（NMA）相比，两阶段搅拌法（TSMA）是改善再生骨料混凝土性能的好工具。目前研究工作的主要目的是研究混合方法对用处理过的再生骨料（TRA）制成的混凝土的影响。基本上已经研究了在新鲜和硬化状态下混凝土的可加工性，机械性能和耐久性能。在这项工作中，使用了四种不同类型的混合方法（即NMA，TSMA，TSMA1和TSMA2）。在所有类型的混合方法中，在M40级对照混合物中，天然骨料均以TRA的不同替代水平替代：0％，25％，50％，75％和100％。根据实验结果，与所有其他混合方法相比，在SMA中使用TRA制成的混凝土的可加工性，强度和耐久性能得到了改善。