Study on Mix Proportion Optimization of Manufactured Sand RPC and Design Method of Steel Fiber Content under Different Curing Methods
This study investigated four factors (water/binder ratio, silica fume, fly ash, and sand/binder ratio) using the orthogonal experimental design method to prepare the mix proportions of a manufactured sand reactive powder concrete (RPC) matrix to determine the optimal matrix mix proportions. On this...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
MDPI AG
2019-06-01
|
Series: | Materials |
Subjects: | |
Online Access: | https://www.mdpi.com/1996-1944/12/11/1845 |
id |
doaj-f6662f2a93774888beae01744eb049be |
---|---|
record_format |
Article |
spelling |
doaj-f6662f2a93774888beae01744eb049be2020-11-24T23:54:49ZengMDPI AGMaterials1996-19442019-06-011211184510.3390/ma12111845ma12111845Study on Mix Proportion Optimization of Manufactured Sand RPC and Design Method of Steel Fiber Content under Different Curing MethodsChunling Zhong0Mo Liu1Yunlong Zhang2Jing Wang3School of Economics and Management, Jilin Jianzhu University, Changchun 130000, ChinaSchool of Civil Engineering, Jilin Jianzhu University, Changchun 130000, ChinaSchool of Transportation Science and Engineering, Jilin Jianzhu University, Changchun 130000, ChinaSchool of Transportation Science and Engineering, Jilin Jianzhu University, Changchun 130000, ChinaThis study investigated four factors (water/binder ratio, silica fume, fly ash, and sand/binder ratio) using the orthogonal experimental design method to prepare the mix proportions of a manufactured sand reactive powder concrete (RPC) matrix to determine the optimal matrix mix proportions. On this basis, we assessed the compressive and splitting tensile strengths of different steel fiber contents under natural, standard, and compound curing conditions to develop an economical and reasonable RPC for various engineering requirements. A calculation method for the RPC strength of the steel fiber contents was evaluated. The results showed that the optimum steel fiber content for manufactured sand RPC is 4% under natural, standard, and compound curing conditions. Compared with standard curing, compound curing can improve the early strength of manufactured sand RPC but only has a small effect on the enhancement of late strength. Although the strength of natural curing is slightly lower than that of standard curing, it basically meets project requirements and is beneficial for practical applications. The calculation formula of 28-day compressive and splitting tensile strengths of manufactured sand RPC steel fiber at 0%−4% is proposed to meet the different engineering requirements and the flexible selection of steel fiber content.https://www.mdpi.com/1996-1944/12/11/1845manufactured sandcompressive strengthsplitting tensile strengthsteel fiber contents |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Chunling Zhong Mo Liu Yunlong Zhang Jing Wang |
spellingShingle |
Chunling Zhong Mo Liu Yunlong Zhang Jing Wang Study on Mix Proportion Optimization of Manufactured Sand RPC and Design Method of Steel Fiber Content under Different Curing Methods Materials manufactured sand compressive strength splitting tensile strength steel fiber contents |
author_facet |
Chunling Zhong Mo Liu Yunlong Zhang Jing Wang |
author_sort |
Chunling Zhong |
title |
Study on Mix Proportion Optimization of Manufactured Sand RPC and Design Method of Steel Fiber Content under Different Curing Methods |
title_short |
Study on Mix Proportion Optimization of Manufactured Sand RPC and Design Method of Steel Fiber Content under Different Curing Methods |
title_full |
Study on Mix Proportion Optimization of Manufactured Sand RPC and Design Method of Steel Fiber Content under Different Curing Methods |
title_fullStr |
Study on Mix Proportion Optimization of Manufactured Sand RPC and Design Method of Steel Fiber Content under Different Curing Methods |
title_full_unstemmed |
Study on Mix Proportion Optimization of Manufactured Sand RPC and Design Method of Steel Fiber Content under Different Curing Methods |
title_sort |
study on mix proportion optimization of manufactured sand rpc and design method of steel fiber content under different curing methods |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2019-06-01 |
description |
This study investigated four factors (water/binder ratio, silica fume, fly ash, and sand/binder ratio) using the orthogonal experimental design method to prepare the mix proportions of a manufactured sand reactive powder concrete (RPC) matrix to determine the optimal matrix mix proportions. On this basis, we assessed the compressive and splitting tensile strengths of different steel fiber contents under natural, standard, and compound curing conditions to develop an economical and reasonable RPC for various engineering requirements. A calculation method for the RPC strength of the steel fiber contents was evaluated. The results showed that the optimum steel fiber content for manufactured sand RPC is 4% under natural, standard, and compound curing conditions. Compared with standard curing, compound curing can improve the early strength of manufactured sand RPC but only has a small effect on the enhancement of late strength. Although the strength of natural curing is slightly lower than that of standard curing, it basically meets project requirements and is beneficial for practical applications. The calculation formula of 28-day compressive and splitting tensile strengths of manufactured sand RPC steel fiber at 0%−4% is proposed to meet the different engineering requirements and the flexible selection of steel fiber content. |
topic |
manufactured sand compressive strength splitting tensile strength steel fiber contents |
url |
https://www.mdpi.com/1996-1944/12/11/1845 |
work_keys_str_mv |
AT chunlingzhong studyonmixproportionoptimizationofmanufacturedsandrpcanddesignmethodofsteelfibercontentunderdifferentcuringmethods AT moliu studyonmixproportionoptimizationofmanufacturedsandrpcanddesignmethodofsteelfibercontentunderdifferentcuringmethods AT yunlongzhang studyonmixproportionoptimizationofmanufacturedsandrpcanddesignmethodofsteelfibercontentunderdifferentcuringmethods AT jingwang studyonmixproportionoptimizationofmanufacturedsandrpcanddesignmethodofsteelfibercontentunderdifferentcuringmethods |
_version_ |
1725464784565960704 |