Characteristics of Ordinary Portland Cement Using the New Colloidal Nano-Silica Mixing Method
This study applies a new method of mixing colloidal nano-silica (CNS). Previous studies have used powdered nano-silica or colloidal nano-silica and applied a binder weight substitution method. In this study, we tried to use ordinary Portland cement (OPC) as a binder and replace CNS with weight of mi...
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MDPI AG
2019-10-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/9/20/4358 |
| _version_ | 1818083664194437120 |
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| author | Taewan Kim Sungnam Hong Ki-Young Seo Choonghyun Kang |
| author_facet | Taewan Kim Sungnam Hong Ki-Young Seo Choonghyun Kang |
| author_sort | Taewan Kim |
| collection | DOAJ |
| description | This study applies a new method of mixing colloidal nano-silica (CNS). Previous studies have used powdered nano-silica or colloidal nano-silica and applied a binder weight substitution method. In this study, we tried to use ordinary Portland cement (OPC) as a binder and replace CNS with weight of mixing water. CNS was replaced by 10%, 20%, 30%, 40%, and 50% of the mixing water weight. The flow value, setting time, compressive strength, hydration reactant (X-ray diffractometer; XRD), pore structure (mercury intrusion porosimetry; MIP), thermal analysis, and scanning electron microscopy (SEM) analysis were performed. Experimental results show that the new substitution method improves the mechanical and microstructural properties through two effects. One is that the weight substitution of the mixing water shows a homogeneous dispersion effect of the nano-silica particles. The other is the effect of decreasing the w/b ratio when the CNS is substituted because the CNS is more dense than the mixing water. Therefore, we confirmed the applicability of mixing water weight replacement method as a new method of mixing CNS. |
| first_indexed | 2024-12-10T19:41:35Z |
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| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-10T19:41:35Z |
| publishDate | 2019-10-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-5b8621a790bb47d2a08c9f013018dcd12022-12-22T01:35:59ZengMDPI AGApplied Sciences2076-34172019-10-01920435810.3390/app9204358app9204358Characteristics of Ordinary Portland Cement Using the New Colloidal Nano-Silica Mixing MethodTaewan Kim0Sungnam Hong1Ki-Young Seo2Choonghyun Kang3Department of Civil Engineering, Pusan National University, Busan 46241, KoreaDepartment of Ocean Civil Engineering, Gyeongsang National University, Gyeongsangnam-do 53064, KoreaHK Engineering & Consultants, Busan 46220, KoreaDepartment of Ocean Civil Engineering, Gyeongsang National University, Gyeongsangnam-do 53064, KoreaThis study applies a new method of mixing colloidal nano-silica (CNS). Previous studies have used powdered nano-silica or colloidal nano-silica and applied a binder weight substitution method. In this study, we tried to use ordinary Portland cement (OPC) as a binder and replace CNS with weight of mixing water. CNS was replaced by 10%, 20%, 30%, 40%, and 50% of the mixing water weight. The flow value, setting time, compressive strength, hydration reactant (X-ray diffractometer; XRD), pore structure (mercury intrusion porosimetry; MIP), thermal analysis, and scanning electron microscopy (SEM) analysis were performed. Experimental results show that the new substitution method improves the mechanical and microstructural properties through two effects. One is that the weight substitution of the mixing water shows a homogeneous dispersion effect of the nano-silica particles. The other is the effect of decreasing the w/b ratio when the CNS is substituted because the CNS is more dense than the mixing water. Therefore, we confirmed the applicability of mixing water weight replacement method as a new method of mixing CNS.https://www.mdpi.com/2076-3417/9/20/4358colloidal nano-silicamixing waterordinary portland cementmechanical and microstructural properties |
| spellingShingle | Taewan Kim Sungnam Hong Ki-Young Seo Choonghyun Kang Characteristics of Ordinary Portland Cement Using the New Colloidal Nano-Silica Mixing Method Applied Sciences colloidal nano-silica mixing water ordinary portland cement mechanical and microstructural properties |
| title | Characteristics of Ordinary Portland Cement Using the New Colloidal Nano-Silica Mixing Method |
| title_full | Characteristics of Ordinary Portland Cement Using the New Colloidal Nano-Silica Mixing Method |
| title_fullStr | Characteristics of Ordinary Portland Cement Using the New Colloidal Nano-Silica Mixing Method |
| title_full_unstemmed | Characteristics of Ordinary Portland Cement Using the New Colloidal Nano-Silica Mixing Method |
| title_short | Characteristics of Ordinary Portland Cement Using the New Colloidal Nano-Silica Mixing Method |
| title_sort | characteristics of ordinary portland cement using the new colloidal nano silica mixing method |
| topic | colloidal nano-silica mixing water ordinary portland cement mechanical and microstructural properties |
| url | https://www.mdpi.com/2076-3417/9/20/4358 |
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