[1] Mi Renjie, , Pan Ganghua, et al. Mathematical models for properties of mortars with admixturesand recycled fine aggregates from demolished concretes [J]. Journal of Southeast University (English Edition), 2018, 34 (3): 371-376. [doi:10.3969/j.issn.1003-7985.2018.03.013]

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Mathematical models for properties of mortars with admixturesand recycled fine aggregates from demolished concretes()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

34

Issue:

2018 3

Page:

371-376

Research Field:

Materials Sciences and Engineering

Publishing date:

2018-09-20

Info

Title:

Mathematical models for properties of mortars with admixturesand recycled fine aggregates from demolished concretes

Author(s):

Mi Renjie¹;  2;  3;  Pan Ganghua¹;  2;  3;  Li Yang¹;  2;  3;  Lu Xiaojun⁴

¹School of Materials Science and Engineering, Southeast University, Nanjing 211189, China
²Jiangsu Key Lab of Construction Materials, Southeast University, Nanjing 211189, China
³Jiangsu Collaborative Innovation Ce

Keywords:

demolished concrete;  recycled fine aggregates;  admixtures;  recycled aggregate mortars;  mathematical model

PACS:

TU528

DOI:

10.3969/j.issn.1003-7985.2018.03.013

Abstract:

In order to expand the engineering application of recycle aggregate mortars(RAM)with aggregates from demolished concretes, the models for the properties of RAM and the replacement rate of these recycled fine aggregates were proposed. First, different kinds of mathematical models for the basic properties(compressive strength, water retention rate, and consistency loss)of RAM with two kinds of admixtures, thickening powders(TP)and self-made powdery admixtures(SSCT)designed for RAM, and the replacement rates were established, while the average relative errors and relative standard errors of these models were calculated. Additionally, the models and their error analyses for the curves of drying shrinkage and curing time of RAM+SSCT at different replacement rates were put forward. The results show that polynomial functions should be used to calculate the basic properties of RAM+TP and RAM+SSCT at different replacement rates. In addition, polynomial functions are the most optimal models for the sharp shrinkage sections in the curves of drying shrinkage-curing time of RAM+SSCT, while exponential functions should be used as the models for the slow shrinkage sections and steady shrinkage sections.

References:

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Memo

Memo:

Biographies: Mi Renjie(1992—), male, Ph.D. candidate; Pan Ganghua(corresponding author), male, doctor, professor, ghpan@seu.edu.cn.
Foundation items: The National Key Research and Development Program of China(No.2017YFC0703100), Postgraduate Research & Practice Innovation Program of Jiangsu Province(No.KYCX18_0081).
Citation: Mi Renjie, Pan Ganghua, Li Yang, et al.Mathematical models for properties of mortars with admixtures and recycled fine aggregates from demolished concretes[J].Journal of Southeast University(English Edition), 2018, 34(3):371-376.DOI:10.3969/j.issn.1003-7985.2018.03.013.

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