优化巴基斯坦当地资源,生产高强度活性粉末混凝土

IF 1 Q4 ENGINEERING, CIVIL Journal of Applied Engineering Sciences Pub Date : 2023-12-01 DOI:10.2478/jaes-2023-0027
M. Jawad, M. Muzffar Iqbal, M. Latif, Gul-e-Zahra Azhar, M. Adil Sultan, S. Naveed
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引用次数: 0

摘要

摘要:活性粉末混凝土(RPC)是最近发明的一种胶结物质,以其卓越的品质而闻名。它结合了细石英砂,破碎的石英,硅灰,低水灰比和高百分比的波特兰水泥。在RPC中,细石英砂完全充当粗集料的角色。本研究考察了高温固化对RPC强度的影响,同时集中研究了在巴基斯坦使用当地可获得的材料制造RPC。具体来说,超过142兆帕的抗压强度是理想的硬品质之一,必须达到的主要目标。该研究使用了多种试验混合物和固化方法,包括热固化。主要强调的是机械性能,如抗压强度、劈裂气缸强度和弯曲强度。研究了不同钢纤维浓度和养护条件对RPC力学性能的影响。使用不同数量的钢纤维和硅灰,创建了100多种实验混合物。与硅灰水平相比,其范围在水泥重量的25%到35%之间,钢纤维浓度范围在总量的0%到3%之间。结果表明,在60°C、70°C和90°C下的固化效果。值得注意的是,在90°C下养护28天后,抗压强度达到142 MPa,这表明所有养护方法的抗压强度随着养护年龄的增加而普遍上升。
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Optimizing Local Resources in Pakistan to Produce High-Strength Reactive Powder Concrete
Abstract A recently created cementing substance noted for its remarkable qualities is reactive powder concrete (RPC). It incorporates fine quartz sand, crushed quartz, silica fume, a low water-to-cement ratio, and a high percentage of Portland cement. In RPC, fine quartz sand completely takes the role of coarse aggregate. This study examines the effects of high-temperature curing on RPC strength while concentrating on the manufacture of RPC in Pakistan using locally accessible materials. In specifically, a compressive strength of more than 142 MPa is one of the desirable hard qualities that must be attained as the main goal. The study uses a variety of test mixtures and curing methods, including heat curing. The major emphasis is on mechanical properties such as compressive strength, split cylinder strength, and flexural strength. The study also investigates how the mechanical properties of RPC are affected by various steel fiber concentrations and curing conditions. With varying quantities of steel fiber and silica fume, more than 100 experimental mixtures are created. In comparison to silica fume levels, which range between 25% and 35% by weight of cement, steel fiber concentrations range from 0% to 3% by total volume. The results demonstrate the effects of curing at 60°C, 70°C, and 90°C. Notably, after 28 days of curing at 90°C, a compressive strength of 142 MPa is attained, suggesting a general rise in compressive strength across all curing methods with curing age.
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9.10%
发文量
18
审稿时长
12 weeks
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