Benefits of aggregates surface modification in concrete production

1st International Conference on Advances in Environmental Engineering

生态环境科学

Junak, J.^1 ; Sicakova, A.^1

Institute of Environmental Engineering, Faculty of Civil Engineering Technical, University of Kosice, Vysokoskolska 4, Kosice

04200, Slovakia^1

关键词: Coal fly ash;    Concrete productions;    Concrete samples;    Geopolymer materials;    Recycled concrete aggregates;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/92/1/012023/pdf
DOI  :  10.1088/1755-1315/92/1/012023

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In our study, recycled concrete aggregates (RCA), which surfaces had been modified by geopolymer material based on coal fly ash, were used to produce the concrete samples. In these samples, fraction 4/8 mm was replaced by recycled concrete aggregate with a range of 100%. To modify the surface of RCA was "Solo" and "Triple stage" modification used. On these samples real density, total water absorption and compressive strength were examined after 28, 90, 180 and 365 days of hardening. The highest compressive strength 56.8 MPa, after 365 days hardening, reached sample which had improved RCA surface by "Triple stage mixing".