Experimental study on properties of cement mixed with ultrafine circulating fluidized bed fly ash
The effect of ultrafine circulating fluidized bed fly ash (UCFA) on physical and mechanical properties of cement containing different contents of circulating fluidized bed fly ash (CFA) is studied，through rheological property and mortar strength of fresh cement paste test and combined with MIP and S...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Emergency Management Press
2016-08-01
|
| Series: | 矿业科学学报 |
| Subjects: | |
| Online Access: | http://kykxxb.cumtb.edu.cn/article/id/15 |
| _version_ | 1811316425234579456 |
|---|---|
| author | Ren Caifu Wang Dongmin Zheng Dapeng Li Duanle Wang Yiren |
| author_facet | Ren Caifu Wang Dongmin Zheng Dapeng Li Duanle Wang Yiren |
| author_sort | Ren Caifu |
| collection | DOAJ |
| description | The effect of ultrafine circulating fluidized bed fly ash (UCFA) on physical and mechanical properties of cement containing different contents of circulating fluidized bed fly ash (CFA) is studied，through rheological property and mortar strength of fresh cement paste test and combined with MIP and SEM microscopic test method，etc.The results show that cement single-mixed CFA has a larger water demand and poor fluidity，and its strength decreases significantly.Compared with cement single-mixed CFA，the cement of which CFA is partially replaced with 5% (optimum content) UCFA has a corresponding less water demand，greater fluidity ，smaller yield stress(<i>τ</i><sub>0</sub>) and plastic viscosity(<i>η</i>) of cement paste，and the workability of paste is improved obviously.Strength of cement containing 30% fly ash increases by 6% at 3 days，when strength of cement containing 60% fly ash increases by 5% at 28 days，reaching 32.5 cement grade requirements.The incorporation of UCFA can promote cement containing CFA to generate more ettringite and C-S-H gel and optimize pore structure of hardened cement paste，and thus improve strength of cement. |
| first_indexed | 2024-04-13T11:48:39Z |
| format | Article |
| id | doaj.art-a0f3e5da92e8492f808186925d98b9bc |
| institution | Directory Open Access Journal |
| issn | 2096-2193 |
| language | English |
| last_indexed | 2024-04-13T11:48:39Z |
| publishDate | 2016-08-01 |
| publisher | Emergency Management Press |
| record_format | Article |
| series | 矿业科学学报 |
| spelling | doaj.art-a0f3e5da92e8492f808186925d98b9bc2022-12-22T02:48:06ZengEmergency Management Press矿业科学学报2096-21932016-08-011196102Experimental study on properties of cement mixed with ultrafine circulating fluidized bed fly ashRen Caifu0Wang Dongmin1Zheng Dapeng2Li Duanle3Wang Yiren4School of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, ChinaSchool of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, ChinaSchool of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, ChinaSchool of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, ChinaSchool of Chemical and Environmental Engineering, China University of Mining and Technology, Beijing 100083, ChinaThe effect of ultrafine circulating fluidized bed fly ash (UCFA) on physical and mechanical properties of cement containing different contents of circulating fluidized bed fly ash (CFA) is studied，through rheological property and mortar strength of fresh cement paste test and combined with MIP and SEM microscopic test method，etc.The results show that cement single-mixed CFA has a larger water demand and poor fluidity，and its strength decreases significantly.Compared with cement single-mixed CFA，the cement of which CFA is partially replaced with 5% (optimum content) UCFA has a corresponding less water demand，greater fluidity ，smaller yield stress(<i>τ</i><sub>0</sub>) and plastic viscosity(<i>η</i>) of cement paste，and the workability of paste is improved obviously.Strength of cement containing 30% fly ash increases by 6% at 3 days，when strength of cement containing 60% fly ash increases by 5% at 28 days，reaching 32.5 cement grade requirements.The incorporation of UCFA can promote cement containing CFA to generate more ettringite and C-S-H gel and optimize pore structure of hardened cement paste，and thus improve strength of cement.http://kykxxb.cumtb.edu.cn/article/id/15circulating fluidized bedultrafine ashworkabilitystrengthpore structure |
| spellingShingle | Ren Caifu Wang Dongmin Zheng Dapeng Li Duanle Wang Yiren Experimental study on properties of cement mixed with ultrafine circulating fluidized bed fly ash 矿业科学学报 circulating fluidized bed ultrafine ash workability strength pore structure |
| title | Experimental study on properties of cement mixed with ultrafine circulating fluidized bed fly ash |
| title_full | Experimental study on properties of cement mixed with ultrafine circulating fluidized bed fly ash |
| title_fullStr | Experimental study on properties of cement mixed with ultrafine circulating fluidized bed fly ash |
| title_full_unstemmed | Experimental study on properties of cement mixed with ultrafine circulating fluidized bed fly ash |
| title_short | Experimental study on properties of cement mixed with ultrafine circulating fluidized bed fly ash |
| title_sort | experimental study on properties of cement mixed with ultrafine circulating fluidized bed fly ash |
| topic | circulating fluidized bed ultrafine ash workability strength pore structure |
| url | http://kykxxb.cumtb.edu.cn/article/id/15 |
| work_keys_str_mv | AT rencaifu experimentalstudyonpropertiesofcementmixedwithultrafinecirculatingfluidizedbedflyash AT wangdongmin experimentalstudyonpropertiesofcementmixedwithultrafinecirculatingfluidizedbedflyash AT zhengdapeng experimentalstudyonpropertiesofcementmixedwithultrafinecirculatingfluidizedbedflyash AT liduanle experimentalstudyonpropertiesofcementmixedwithultrafinecirculatingfluidizedbedflyash AT wangyiren experimentalstudyonpropertiesofcementmixedwithultrafinecirculatingfluidizedbedflyash |