1
|
Zhang Q, Chen J, Zhu J, Yang Y, Zhou D, Wang T, Shu X, Qiao M. Advances in Organic Rheology-Modifiers (Chemical Admixtures) and Their Effects on the Rheological Properties of Cement-Based Materials. MATERIALS (BASEL, SWITZERLAND) 2022; 15:8730. [PMID: 36556536 PMCID: PMC9784188 DOI: 10.3390/ma15248730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Revised: 11/19/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
Organic rheology modifiers, especially superplasticizers and viscosity-modifying admixtures (VMAs), have become key components for the workability optimization of modern concrete. The development of these admixtures is crucial to the further performance improvement of modern concrete under different casting and service conditions. Many of the former reviews have summarized research advances in respect of these admixtures from chemical and material perspectives, focusing on the effects of structure and the performance. In this paper, from a rheological perspective, an overview is provided of the microscale behavior of polycarboxylate (PCE) superplasticizers and VMAs (e.g., adsorption, conformation, and bridging) in terms of the evolution of the microstructure of the paste, the effect of chemical structure on the yield stress, the apparent viscosity and thixotropy of cement-based materials, and the structure design of these admixtures. Most importantly, in addition to a general discussion with assumptions (monolayer adsorption of a "flat" conformation, with each molecule on a single particle; statistical polymer composition), special conditions (e.g., preferential adsorption, depletion effects, hydration modification effects, and the polydispersity of the polymer composition) are discussed. Newly developed admixtures, realized through regulation of the microscale behavior, and by the modification of adsorption, topological structure, and molecular frame, are introduced.
Collapse
Affiliation(s)
- Qianqian Zhang
- State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
| | - Jian Chen
- State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
| | - Jiang Zhu
- Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, China
| | - Yong Yang
- State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
| | - Dongliang Zhou
- State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
| | - Tao Wang
- State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
| | - Xin Shu
- State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
| | - Min Qiao
- State Key Laboratory of High Performance Civil Engineering Materials, Jiangsu Sobute New Materials Co., Ltd., Nanjing 211103, China
| |
Collapse
|
2
|
Wang B, Qi S, Fan S, Wang T, Ma J, Han Z, Ran Q. Synthesis and properties of a novel structure of phosphated superplasticizer. J DISPER SCI TECHNOL 2019. [DOI: 10.1080/01932691.2019.1611443] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Bing Wang
- State Key Laboratory of High Performance Civil Engineering Materials (HPCEM), Jiangsu Sobute New Materials Co. Ltd, Nanjing, China
| | - Shuai Qi
- State Key Laboratory of High Performance Civil Engineering Materials (HPCEM), Jiangsu Sobute New Materials Co. Ltd, Nanjing, China
| | - Shimin Fan
- State Key Laboratory of High Performance Civil Engineering Materials (HPCEM), Jiangsu Sobute New Materials Co. Ltd, Nanjing, China
| | - Tao Wang
- State Key Laboratory of High Performance Civil Engineering Materials (HPCEM), Jiangsu Sobute New Materials Co. Ltd, Nanjing, China
| | - Jianfeng Ma
- State Key Laboratory of High Performance Civil Engineering Materials (HPCEM), Jiangsu Sobute New Materials Co. Ltd, Nanjing, China
| | - Zheng Han
- State Key Laboratory of High Performance Civil Engineering Materials (HPCEM), Jiangsu Sobute New Materials Co. Ltd, Nanjing, China
| | - Qianping Ran
- State Key Laboratory of High Performance Civil Engineering Materials (HPCEM), Jiangsu Sobute New Materials Co. Ltd, Nanjing, China
| |
Collapse
|
3
|
Tramaux A, Azéma N, El Bitouri Y, David G, Negrell C, Poulesquen A, Haas J, Remond S. Synthesis of phosphonated comb-like copolymers and evaluation of their dispersion efficiency on CaCO3 suspensions part II: Effect of macromolecular structure and ionic strength. POWDER TECHNOL 2018. [DOI: 10.1016/j.powtec.2018.04.020] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|