The influence of aggregate gradation on the fresh and hardened concrete properties

11th International Scientific Conference of Civil and Environmental Engineering for PhD. Students and Young Scientists

土木建筑工程;生态环境科学

Figmig, R.^1 ; Kovac, M.^1

Technical University of Kosice, Faculty of Civil Engineering, Institute of Environmental Engineering, Department of Material Engineering, Slovakia^1

关键词: Aggregate gradations;    Different proportions;    Flow tables;    Hardened concrete;    Hardened concrete properties;    Mix designs;    Standard compressive strengths;    Variable factors;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/566/1/012007/pdf
DOI  :  10.1088/1757-899X/566/1/012007

来源: IOP

【 摘 要 】

This experimental study is focused on the aggregate gradation impact on the properties of fresh and hardened concrete. For the experiment, 9 mix design were prepared with the constant content of cement, effective water, plasticizer and aggregate. The variable factor is represented by different proportions of 4 fraction (0/0.7, 0/4, 4/8, 8/16). Consistency by slump and flow table in time, compressive strength, water absorption and density were measured. Some significant differences were observed. Consistency by the slump test varied from 0 to 170 mm after 5 minutes and from 0 to 50 mm after 30 minutes of concrete mixing. Consistency by flow table varied from 340 to 530 mm after 5 minutes and 320 to 460 mm after 30 minutes. Standard compressive strength varied from 50.8 to 61.6 MPa. Water absorption varied between 4.7 and 5.9 mass % and density from 2380 to 2440 kg.m-3.