自充填混凝土以不銹鋼還原碴取代部分水泥之可行性研究

Feasibility Study of Self-Compacting Concrete Containing Stainless Steel Reduced Slag

沈永年(Yeong-Nain Sheen) ； 周佳晏(Chia-Yen Chou) ； 廖培丞(Pei-Cheng Liao)

《臺灣鑛業》 66卷2期 (2014/06) Pp. 24-32

摘要

本研究以不銹鋼還原碴取代部分水泥拌合成自充填混凝土，達到減少水泥用量之節能減碳訴求，降低爐碴事業廢棄物對環境衝擊及節省混凝土成本。本研究採用不銹鋼還原碴依不同比例取代部分水泥，針對自充填混凝土之新拌性質、硬固性質進行比較，探討不銹鋼還原碴取代部分水泥之可行性。結果顯示，不銹鋼還原碴部分取代水泥量0~30%之自充填混凝土配比可滿足設計目標。坍流度大於600mm，V型漏斗流下時間7~20sec，箱型填充高度大於300mm，具良好工作性及自充填能力。抗壓強度於28天齡期均大於420kgf/cm^2，超音波波速值超過4,000m/s，符合自充填性及高強度性要求。即不銹鋼還原碴可部分取代水泥減少水泥用量，降低自充填混凝土成本，並達到不銹鋼爐碴資源化之目的，減少爐碴事業廢棄物對環境的衝擊。

關鍵字

自充填混凝土 ； 不銹鋼還原碴 ； 工程性質

並列摘要

In this study, Stainless Steel Reduced Slag (SSRS) to replace part of the cement to mix Self-Compacting Concrete (SCC), reducing the amount of carbon reduction aspirations of the cement, reducing the environmental impact of slag industrial waste and saving concrete cost. In the study, depending on the proportion of SSRS to replace part of the cement, compared for SCC fresh properties and hardened properties, explore the feasibility of SCC using SSRS to replace part of cement. The results show that SSC with the SSRS substitution level of 0~30% are observed to achieve the goal designs. For instance, the slump flow and filling high of box-test are measured to be greater than 600mm and 300 mm, respectively; V-funnel falling time is ranged from 7-20 sec. It also implies that SCC containing up to 30% SSRS can provide a good workability and self-compactness ability. In addition, the strength and durability of the SCC were further investigated. The cylindrical compressive strength and pulse velocity at 28 days were greater than 420 kgf/cm^2 and 4,000m/s, compliance with self-filling and high strength requirements. As regards above testing results SSRS can partially replace cement to reduce the amount of cement to reduce the cost of SCC and achieve the purpose of the SSRS recycling, reducing slag industrial waste impact on the environment.

並列關鍵字

Self-Compacting Concrete (SCC) ； Stainless Steel Reduced Slag (SSRS) ； Engineering properties