NDLI: Study on Recycled Concrete Powders as Mineral Admixture in Recycled Concrete

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Study on Recycled Concrete Powders as Mineral Admixture in Recycled Concrete

Content Provider	Scilit
Author	Chen, Xi Li, Ying Kang, Xiao Ming Fan, Yaohu
Copyright Year	2019
Description	Journal: Iop Conference Series: Earth and Environmental Science The process of recycling waste concrete generated fine powders with a particle size of less than 0.16mm; it contains a large amount of hardened cement and unhydrated cement and has high activity. In order to meet the requirement of sustainable development in concrete industry, this study aims to improve the recycle use level of these fine powders in concrete. First, the properties of the recycled concrete powder were analyzed, and compared with one normal mineral admixture such as fly ash. Then the workability and compressive strength test of the concrete which mixed by different replacement ratio of the recycled concrete powder and fly ash were performed. The results show that the the content of $SiO_{2}$ in recycled concrete powder is more than cement and fly ash. The replacement rate of RCP has little influence on the slump of fresh recycled concrete compared to fly ash. When the replacement rate of the recycled concrete powder is 20 %, the compressive strength of corresponding concrete at each age is close to that of control concrete, especially at 56d, the compressive strength of concrete reach to 90% of that of control concrete. So the application of the recycled concrete powder can save cement and has certain environmental and economic benefits.
Related Links	https://iopscience.iop.org/article/10.1088/1755-1315/330/2/022113/pdf
ISSN	17551307
e-ISSN	17551315
DOI	10.1088/1755-1315/330/2/022113
Journal	Iop Conference Series: Earth and Environmental Science
Issue Number	2
Volume Number	330
Language	English
Publisher	IOP Publishing
Publisher Date	2019-10-01
Access Restriction	Open
Subject Keyword	Journal: Iop Conference Series: Earth and Environmental Science Characterization and Testing of Materials Recycled Concrete Powder
Content Type	Text
Resource Type	Article
Subject	Earth and Planetary Sciences Physics and Astronomy Environmental Science

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