Effects of High-Volume Ground Slag Powder on the Properties of High-Strength Concrete under Different Curing Conditions

Crystals

Yuqi Zhou¹  Jianwei Sun²  Zengqi Zhang³ 

[1] China Construction First Group Construction and Development Co., Ltd., Beijing 100102, China;Department of Civil Engineering, Tsinghua University, Beijing 100084, China;School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing, Beijing 100083, China;

关键词: GSP;    high strength;    hydration;    strength;    penetrability;   

DOI  :  10.3390/cryst11040348

来源: DOAJ

【 摘 要 】

Massive high-strength concrete structures tend to have a high risk of cracking. Ground slag powder (GSP), a sustainable and green industrial waste, is suitable for high-strength concrete. We carried out an experimental study of the effects of GSP with a specific surface area of 659 m²/kg on the hydration, pore structure, compressive strength and chloride ion penetrability resistance of high-strength concrete. Results show that adding 25% GSP increases the adiabatic temperature rise of high-strength concrete, whereas adding 45% GSP decreases the initial temperature rise. Incorporating GSP refines the pore structure to the greatest extent and improves the compressive strength and chloride ion penetrability resistance of high-strength concrete, which is more obvious under early temperature-matching curing conditions. Increasing curing temperature has a more obvious impact on the pozzolanic reaction of GSP than cement hydration. From a comprehensive perspective, GSP has potential applications in the cleaner production of green high-strength concrete.

【 授权许可】

Unknown