RESEARCH ARTICLE


Properties of Self-Compacting Concrete with Machine-Made Sand and High-Volume Mineral Admixtures



Zhengwu Jiang*, 1, Shilong Mei2
1 Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 200092, China.
2 Guizhou Expressway Development Corporation, Guiyang 550004, China


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Creative Commons License
© 2008 Jiang and Mei

open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.

* Address correspondence to this author at the Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, 1239 Siping Road, Shanghai, China 200092. E-mail: jzhw@tongji.edu.cn


Abstract

Based on appropriate assessment methods and indexes of self-compacting concrete proposed, properties of concrete made with river-sand and machine-made sand was firstly compared in different mix proportions. The techniques such as basic parameters optimization of mix proportion, admixture composition, large-volume mineral admixtures addition for preparing machine-made sand self-compacting concrete (MSCC) were proposed, and effect of different factors on workability and compressive strength of MSCC was studied. The results indicate that requirements on parameters of mix proportion for MSCC are different from those of river-sand self-compacting concrete. Applying the techniques such as basic parameters optimization of mixture, admixture composition, high-volume mineral admixtures addition, MSCC with initial slump above 24cm, slump flow over 60cm, delivery time of inverted slump cone (DTIS) between 5s and 15s, compressive strength above 60MPa at 28 days was prepared.

Keywords: Machine-made sand, self-compacting, concrete.