The mechanical and durability behavior of Recycled concrete aggregates (RCA) based High volume fly ash-Self compacting concrete (HVFA-SCC) has been examined through detailed experimental investigation. The article explores the overall behavior of HVFA-SCC made with 0%, 25%, 50%, 75% and 100% of RCA with alteration of Natural coarse aggregates (NCA) and in conjunction with 10% of Coal bottom ash (CBA) as alteration of Natural fine aggregates (NFA) through evaluation of several properties. Various mechanical tests (Compressive and Tensile strength) and durability tests (Accelerated carbonation, Electrical resistivity, Rapid chloride penetration-chloride permeability, Capillary suction, Initial surface absorption, Ultrasonic pulse velocity-UPV) were carried on HVFA-SCC mixes prepared with specific amounts of RCA, Fly ash (FA) and CBA. The findings confirmed the feasibility of HVFA-SCC made with alteration of NFA/NCA with CBA/RCA at specific levels respectively resulting in reasonable performance with respect to aforesaid properties. Projecting three (3) way benefits (i.e. Portland cement (PC) with HVFA; NFA with CBA and NCA with RCA) probably leads to widespread usage and recycling of by-products generated from the coal (FA and CBA) and construction industry (RCA) respectively. Such an effort assures the minimization of concerns like regulation and disposal of coal and construction industry wastes/by-products to a significant extent.

通过详细的实验研究，研究了基于再生混凝土骨料（RCA）的高体积粉煤灰-自密实混凝土（HVFA-SCC）的机械性能和耐久性。本文探讨了用0％，25％，50％，75％和100％的RCA制成的HVFA-SCC的整体性能，改变了天然粗骨料（NCA）并结合了10％的煤灰（CBA）通过评估几种性能来改变天然细骨料（NFA）。对HVFA-SCC混合物进行了各种机械测试（抗压强度和拉伸强度）和耐久性测试（加速碳化，电阻率，快速的氯化物渗透-氯化物渗透性，毛细管抽吸，初始表面吸收，超声波脉冲速度-UPV） RCA，粉煤灰（FA）和CBA。该发现证实了用NFA / NCA与CBA / RCA分别在特定水平上进行改变而制成的HVFA-SCC的可行性，从而在上述性能方面具有合理的性能。预计三（3）种方式的收益（例如，使用HVFA的波特兰水泥（PC）；使用CBA的NFA和使用RCA的NCA）可能会导致煤炭（FA和CBA）和建筑业（RCA）产生的副产品的广泛使用和回收） 分别。这样的努力可以最大程度地减少诸如煤炭的管理和处置以及建筑业废物/副产品之类的问题。含HVFA的硅酸盐水泥（PC）；使用CBA的NFA和使用RCA的NCA）可能分别导致广泛使用和回收从煤炭（FA和CBA）和建筑业（RCA）产生的副产品。这样的努力可以最大程度地减少诸如煤炭的管理和处置以及建筑业废物/副产品之类的问题。含HVFA的硅酸盐水泥（PC）；使用CBA的NFA和使用RCA的NCA）可能分别导致煤炭（FA和CBA）和建筑业（RCA）产生的副产品的广泛使用和回收。这样的努力可以最大程度地减少诸如煤炭的监管和处置以及建筑业废物/副产品之类的问题。