This paper presents the fresh and hardened properties of high-strength concrete comprising byproduct fine crushed aggregates (FCAs) sourced from the crushing of three different types of rocks, namely granophyre, basalt, and granite. The lowest void contents of the combined fine aggregates were observed when 40% to 60% of natural sand is replaced by the FCAs. By the replacement of 40% FCAs, the slump and bleeding of concrete with a water-to-cement ratio of 0.45 decreased by approximately 15% and 50%, respectively, owing to the relatively high fines content of the FCAs. The 28 d compressive strength of concrete was 50 MPa when 40% FCAs were used. The slight decrease in tensile strength from the FCAs is attributed to the flakiness of the particles. The correlations between the splitting tensile and compressive strengths of normal concrete provided in the AS 3600 and ACI 318 design standards are applicable for concrete using the FCAs as partial replacement of sand. The maximum 56 d drying shrinkage is 520 microstrains, which is significantly less than the recommended limit of 1000 microstrains by AS 3600 for concrete. Therefore, the use of these byproduct FCAs can be considered as a sustainable alternative option for the production of high-strength green concrete.

本文介绍了高强度混凝土的新鲜和硬化性能，该高强度混凝土包含副产品细碎骨料（FCA），这些细碎骨料来自三种不同类型的岩石，即花岗石，玄武岩和花岗岩。当40％至60％的天然砂被FCA取代时，观察到混合细骨料的最低空隙率。通过更换40％的FCA，由于FCAs的细粉含量较高，水灰比为0.45的混凝土的坍落度和渗出率分别降低了约15％和50％。当使用40％FCA时，混凝土的28 d抗压强度为50 MPa。来自FCA的抗张强度的轻微降低归因于颗粒的脆性。AS 3600和ACI 318设计标准中提供的普通混凝土的抗拉强度和抗压强度之间的相关性适用于使用FCA代替沙子的混凝土。最大的56 d干缩为520微应变，大大低于AS 3600建议的混凝土1000微应变的极限。因此，这些副产品FCA的使用可被视为生产高强度绿色混凝土的可持续替代选择。