Blikharskyy Zinoviy, Sobol Khrystyna, Markiv Taras, Selejdak Jacek
Faculty of Civil Engineering, Czestochowa University of Technology, 69 Str. Dabrowskiego, 42-201 Czestochowa, Poland.
Lviv Polytechnic National University, Bandera Str. 12, 79000 Lviv, Ukraine.
Materials (Basel). 2021 May 18;14(10):2638. doi: 10.3390/ma14102638.
In this paper, properties of concretes incorporating recycling waste and corrosion susceptibility of reinforcing steel bars were studied. It was established that fineness of ground granulated blast furnace slag (GGBFS) and fly ash (FA) and their simultaneous combination have an influence on the kinetics of strength development of Portland cements and concretes. The compressive strength of concrete containing 10% by mass of GGBFS and 10% by mass of FA even exceeds the compressive strength of control concrete by 6.5% and concrete containing 20% by mass of GGBFS by 8.8% after 56 days of hardening. The formation of the extra amount of ettringite, calcium hydrosilicates as well as hydroaluminosilicates causes tightening of a cement matrix of concrete, reducing its water absorption, and improving its resistance to freezing and thawing damage.
本文研究了掺入再生废料的混凝土性能以及钢筋的腐蚀敏感性。结果表明，磨细粒化高炉矿渣（GGBFS）和粉煤灰（FA）的细度及其同时组合对硅酸盐水泥和混凝土强度发展的动力学有影响。在硬化56天后，含有10%质量分数GGBFS和10%质量分数FA的混凝土抗压强度甚至比对照混凝土的抗压强度高出6.5%，比含有20%质量分数GGBFS的混凝土高出8.8%。额外生成的钙矾石、水化硅酸钙以及水化铝硅酸盐使得混凝土的水泥基体致密化，降低了其吸水性，并提高了其抗冻融破坏性能。
