Function Synergy of Cross-Linked Cationic PVA Polymer to AMPS-Type Fluid Loss Additive Used for Cement-Based Material
In this research, a kind of 2-acrylamido-2-methylpropanesulfonic acid sodium salt- (AMPS-Na-) type copolymer additive, the fluid loss additive (FLA), named as FLA A additive, was used for research. The performance of FLA A was tested and found to fail in the effective control of free water and to hi...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
|
| Series: | International Journal of Polymer Science |
| Online Access: | http://dx.doi.org/10.1155/2020/5968318 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832566010609139712 |
|---|---|
| author | Hao Wang Ming Li Youzhi Zheng Tao Gu |
| author_facet | Hao Wang Ming Li Youzhi Zheng Tao Gu |
| author_sort | Hao Wang |
| collection | DOAJ |
| description | In this research, a kind of 2-acrylamido-2-methylpropanesulfonic acid sodium salt- (AMPS-Na-) type copolymer additive, the fluid loss additive (FLA), named as FLA A additive, was used for research. The performance of FLA A was tested and found to fail in the effective control of free water and to hinder the hydration process for delaying the breaking of the early hydration shell. The reason for it was the absorbed behavior and chelating effect of the AMPS-Na unit to Ca2+ hydrating cement particles. Thus, a cationic polyvinyl alcohol (PVA) polymer, modified by glyoxal and boric acid, was discovered due to its excellence in associating with the FLA A additive for controlling the free cement-based material water amount and preventing the chelating effect of FLA A chains on the surface of the cement-based material. Glyoxal/boric acid-modified polyvinyl alcohol, abbreviated as PVAGB or PVA-G-B, was with special molecular properties, i.e., positive ZETA (ζ) potential characteristics and cross-linked molecular structure. Due to competitive absorbed behavior of glyoxal-modified hydroxyl groups and free Ca2+ released by the hydration product, the chelating effect of AMPS-Na units to Ca2+ was weakened and the possibility of FLA A chains being absorbed to the surface of the cement-based material was decreased. Then, the formation of a complete fluid loss system was obtained; i.e., the fluid loss volume decreased to less than 50 mL at 30°C and 108 mL at 80°C with 0.2 percentage by weight of cement (%BWOC) of PVAGB and 0.50%BWOC (percentage by weight of cement) of FLA A. Besides, the hydration process of cement-based material was accelerated due to formation of more C-S-H gels in the early hydration period. As a result, the cement-based material not only showed no worse compressive-strength retrogression but also showed a stable 28-day compressive strength of 28 MPa. |
| format | Article |
| id | doaj-art-99ec904c8e3c46f1986e3e559b182fc0 |
| institution | Kabale University |
| issn | 1687-9422 1687-9430 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Polymer Science |
| spelling | doaj-art-99ec904c8e3c46f1986e3e559b182fc02025-02-03T01:05:24ZengWileyInternational Journal of Polymer Science1687-94221687-94302020-01-01202010.1155/2020/59683185968318Function Synergy of Cross-Linked Cationic PVA Polymer to AMPS-Type Fluid Loss Additive Used for Cement-Based MaterialHao Wang0Ming Li1Youzhi Zheng2Tao Gu3School of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, ChinaSchool of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, ChinaEngineering Technology Research Institute, PetroChina Southwest Oil & Gas Field Company, Guanghan, Sichuan 618300, ChinaEngineering Technology Research Institute, PetroChina Southwest Oil & Gas Field Company, Guanghan, Sichuan 618300, ChinaIn this research, a kind of 2-acrylamido-2-methylpropanesulfonic acid sodium salt- (AMPS-Na-) type copolymer additive, the fluid loss additive (FLA), named as FLA A additive, was used for research. The performance of FLA A was tested and found to fail in the effective control of free water and to hinder the hydration process for delaying the breaking of the early hydration shell. The reason for it was the absorbed behavior and chelating effect of the AMPS-Na unit to Ca2+ hydrating cement particles. Thus, a cationic polyvinyl alcohol (PVA) polymer, modified by glyoxal and boric acid, was discovered due to its excellence in associating with the FLA A additive for controlling the free cement-based material water amount and preventing the chelating effect of FLA A chains on the surface of the cement-based material. Glyoxal/boric acid-modified polyvinyl alcohol, abbreviated as PVAGB or PVA-G-B, was with special molecular properties, i.e., positive ZETA (ζ) potential characteristics and cross-linked molecular structure. Due to competitive absorbed behavior of glyoxal-modified hydroxyl groups and free Ca2+ released by the hydration product, the chelating effect of AMPS-Na units to Ca2+ was weakened and the possibility of FLA A chains being absorbed to the surface of the cement-based material was decreased. Then, the formation of a complete fluid loss system was obtained; i.e., the fluid loss volume decreased to less than 50 mL at 30°C and 108 mL at 80°C with 0.2 percentage by weight of cement (%BWOC) of PVAGB and 0.50%BWOC (percentage by weight of cement) of FLA A. Besides, the hydration process of cement-based material was accelerated due to formation of more C-S-H gels in the early hydration period. As a result, the cement-based material not only showed no worse compressive-strength retrogression but also showed a stable 28-day compressive strength of 28 MPa.http://dx.doi.org/10.1155/2020/5968318 |
| spellingShingle | Hao Wang Ming Li Youzhi Zheng Tao Gu Function Synergy of Cross-Linked Cationic PVA Polymer to AMPS-Type Fluid Loss Additive Used for Cement-Based Material International Journal of Polymer Science |
| title | Function Synergy of Cross-Linked Cationic PVA Polymer to AMPS-Type Fluid Loss Additive Used for Cement-Based Material |
| title_full | Function Synergy of Cross-Linked Cationic PVA Polymer to AMPS-Type Fluid Loss Additive Used for Cement-Based Material |
| title_fullStr | Function Synergy of Cross-Linked Cationic PVA Polymer to AMPS-Type Fluid Loss Additive Used for Cement-Based Material |
| title_full_unstemmed | Function Synergy of Cross-Linked Cationic PVA Polymer to AMPS-Type Fluid Loss Additive Used for Cement-Based Material |
| title_short | Function Synergy of Cross-Linked Cationic PVA Polymer to AMPS-Type Fluid Loss Additive Used for Cement-Based Material |
| title_sort | function synergy of cross linked cationic pva polymer to amps type fluid loss additive used for cement based material |
| url | http://dx.doi.org/10.1155/2020/5968318 |
| work_keys_str_mv | AT haowang functionsynergyofcrosslinkedcationicpvapolymertoampstypefluidlossadditiveusedforcementbasedmaterial AT mingli functionsynergyofcrosslinkedcationicpvapolymertoampstypefluidlossadditiveusedforcementbasedmaterial AT youzhizheng functionsynergyofcrosslinkedcationicpvapolymertoampstypefluidlossadditiveusedforcementbasedmaterial AT taogu functionsynergyofcrosslinkedcationicpvapolymertoampstypefluidlossadditiveusedforcementbasedmaterial |