Rudnicki Tomasz
Faculty of Civil Engineering and Geodesy, Military University of Technology, 2 Kaliskiego St., 00-908 Warsaw, Poland.
Materials (Basel). 2024 Dec 24;18(1):4. doi: 10.3390/ma18010004.
This article presents the procedure for designing self-compacting cement concrete characterized by minimal free space and a maximally compacted mineral skeleton. Such a designed mix allows for lower cement consumption and an increased amount of mineral additives. The paper presents a broad analysis of the influence of different aggregate proportions (36 recipes) and verification of the properties of the concrete mix using CEM I 42.5 R cements and fly ash. As a result of the appropriately compacted mineral skeleton, only 17% free space was obtained, which will allow the amount of cement to be reduced from 500 kg/m to 350 kg/m while fully maintaining the properties of the mix and hardened concrete. After 90 days of curing, SCC concrete was characterized by a compressive strength above 68 MPa and a small 2.1% decrease in compressive strength after 100 freeze-thaw cycles.
本文介绍了一种自密实水泥混凝土的设计方法，其特点是自由空间最小且矿物骨架压实度最大。这种设计的混合料可降低水泥用量并增加矿物添加剂的用量。本文对不同集料比例（36种配方）的影响进行了广泛分析，并使用CEM I 42.5 R水泥和粉煤灰对混凝土混合料的性能进行了验证。由于矿物骨架得到了适当压实，仅获得了17%的自由空间，这将使水泥用量从500kg/m³减少到350kg/m³，同时完全保持混合料和硬化混凝土的性能。养护90天后，自密实混凝土的抗压强度高于68MPa，经过100次冻融循环后抗压强度仅小幅下降2.1%。
