Synthesis and performance evaluation of a superplasticizer prepared from coal-based humic acid
Source abstract
Abstract
Superplasticizers (SPs) are indispensable in modern concrete technology. A novel, cost-effective method for synthesizing a high-performance SP using coal-based humic acid (CHA) derived from lignite is presented. Through oxidative depolymerization of lignite to prepare CHA, followed by sulfomethylation and condensation reactions, a CHA-based SP (called SP(CHA)) was successfully developed. Structural characterization confirmed the successful synthesis of CHA and its transformation into SP(CHA). Notably, the CHA demonstrated superior sulfomethylation reactivity compared with a commercially available sodium humate (NaA). Performance evaluations showed that the synthesized SP(CHA) outperformed both a commercial sulfonated naphthalene–formaldehyde condensate and SP(NaA) in terms of water-reduction efficiency, slump retention, and enhanced long-term compressive strength. Specifically, SP(CHA) achieved a water-reducing rate of 16.4% and a 28-day compressive strength improvement of 23.2%, exceeding the benchmarks for high-efficiency water reducers. By harnessing abundant and low-cost lignite resources, the approach holds substantial promise for advancing sustainable construction practices.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Recycling and utilization of industrial and municipal waste in materials production
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Anhui University of Technology School of Chemistry and Chemical Engineering, Anhui Key laboratory of Clean Coal Conversion & Utilization, , Ma’anshan,
Funding
National Natural Science Foundation of China · Key Scientific Research Foundation of the Education Department of Anhui Province
References (41)
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