Affiliation:
1. Institute of Environmental Science, Shanxi University, Taiyuan 030006, China
2. College of Environment and Resource, Shanxi University, Taiyuan 030006, China
3. Shanxi Laboratory for Yellow River, Taiyuan 030006, China
Abstract
A lignin modified salt-resistant branched high-performance water reducer was prepared via free radical polymerization. The water-reducing agent was identified through its NMR spectrum, elemental analysis, Fourier transform infrared analysis, thermal gravimetric analysis, and scanning electron microscopy. The experiment conducted on cement paste demonstrates that the water-reducing efficiency can reach a maximum of 44%. Additionally, the significant spatial steric hindrance of the application enhances the dispersal capability of the water-reducing agent, resulting in effective water reduction and reduced viscosity. In addition, its compressive strength is the highest after 3-day curing and 3-, 7-, 28-day standard curing, and it has the best overall performance both in water and saline water prepared systems. The application in oil cement slurry shows that it exhibits a good dispersibility in fresh water, saline water, and substitute ocean water. In the Halfaya and Missan Oilfields of Iraq, BHPWR was used in a slurry with a density of 2.28 g/cm3 for casing the salt paste layer of five wells. The cementing results exceeded expectations with 100% qualified including over 85% excellent.
Funder
Shanxi Province Postdoctoral Special Subsidy ‘2023 Synthesis of High-Performance Salt-Resistant Bioconcrete Water Reducer’
Subject
Polymers and Plastics,General Chemistry
Reference28 articles.
1. Water reducing agents of low molecular weight: Suppression of air entrapment and slump loss by addition of an organic solvent;Rodrigues;Cem. Concr. Res.,1994
2. Study on the effect of fly ash and polycarboxylic acid water reducer on the properties of recycled concrete;Chen;IOP Conf. Ser. Earth Environ. Sci.,2019
3. Research and application of polycarboxylate water reducer for precast components;Chen;IOP Conf. Ser. Earth Environ. Sci.,2021
4. Research of polyocarboxy acid water-reducer with modified ployether and its effect on concrete’s workability;Pang;Adv. Mater. Res.,2011
5. Chen, Y., Chen, Y., Liu, Y., Tao, J., Liu, R., Li, Z., Liu, F., and Li, M. (2023). Effect of the Alkyl Density of Acrylic Acid Ester on the Viscosity-Reducing Effect of Polycarboxylate Superplasticizer. Molecules, 28.