|Table of Contents|

[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()
含拆除混凝土再生细骨料与外加剂的砂浆性能的数学模型
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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
含拆除混凝土再生细骨料与外加剂的砂浆性能的数学模型
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
糜人杰1, 2, 3, 潘钢华1, 2, 3, 李阳1, 2, 3, 陆小军4
1东南大学材料科学与工程学院, 南京 211189; 2东南大学江苏省土木工程材料重点实验室, 南京 211189; 3东南大学江苏省协同创新中心, 南京 211189; 4江苏镇江建筑科学研究院集团股份有限公司, 镇江 212004
Keywords:
demolished concrete;  recycled fine aggregates;  admixtures;  recycled aggregate mortars;  mathematical model
拆除混凝土;  再生细骨料;  外加剂;  再生砂浆;  数学模型
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.
为了扩大含拆除混凝土再生细骨料砂浆的实际工程应用, 建立了再生砂浆性能与其细骨料取代率之间的数学模型.首先, 分别提出了含稠化粉与自制粉状外加剂的再生砂浆基本性能(抗压强度、保水率与稠度损失)与其细骨料取代率之间的多种数学模型, 并计算其平均相对误差与相对标准误差.其次, 建立了不同细骨料取代率下含粉状外加剂的再生砂浆干缩值与龄期之间的数学模型, 并进行了相应的误差分析.结果表明: 含稠化粉与粉状外加剂的再生砂浆基本性能与其细骨料取代率之间的数学模型均宜采用多项式函数;不同细骨料取代率下含粉状外加剂的再生砂浆干缩-龄期曲线中急缩段的数学模型宜采用多项式函数, 缓缩段与稳缩段的数学模型宜采用指数函数.

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.
Last Update: 2018-09-20