Polycarboxylate superplasticizers (PCEs) are indispensable functional ingredients in modern construction, and their usage is extensive. Herein, a polyether macromonomer (VPEG) with high reactivity was used to prepare VAPCEs with different interfacial adsorption properties (acid-ether ratio) at low temperatures and reacted in 30 min. The effects of various VAPCEs on the fluidity, rheology, and strength of cement were investigated with a w/c (water/cement) ratio of 0.35. Results showed that VAPCE-3 (acid-ether ratio is 3) exhibited the best dispersion, and the fluidity of cement slurry with VAPCE-3 (280 mm) is 278.38% higher than that of the control sample (74 mm). The reason is summarized as VAPCE-3 having good adsorption performance on the surface of cement particles and having a large steric hindrance between particles. The compressive strength of cement with VAPCE-3 was enhanced by 8.29% compared with pure cement in 3 days of curing age due to its densification on microstructure and lowest orientation index of calcium hydroxide. With the amount of acrylic acid in VAPCE increasing, the flexural strength enhanced because a more cross-linking network was formed with Ca in cement with the increase of COO content in VAPCEs.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1021/acs.langmuir.3c03021 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
This study used coal combustion products (CCP) with different calcium contents to replace partial aluminate cement (AC) in equal amounts, and studied the effect of calcium contents on the setting time and early compressive strength of AC. The setting time and early compressive strength were further regulated by adding retarder. The results showed that the higher the calcium content of CCP (CCP2 contains higher calcium content), the shorter the setting time and the higher the 2 h compressive strength after replacing part of cement.
View Article and Find Full Text PDFHealing the Open Apex: A Case Report on Innovative Apexogenesis of a Maxillary Molar Using Bio-C Repair.
Cureus
December 2024
Department of Conservative Dentistry and Endodontics, The Oxford Dental College, Bengaluru, IND.
Preserving pulp vitality in developing permanent teeth is paramount. This approach facilitates continued root formation, ultimately leading to apical closure, enhanced root strength, and improved overall tooth integrity. This case report details the management of a 17-year-old female patient presenting with dental caries on the right permanent maxillary molar.
View Article and Find Full Text PDFInfluence of interface sawtooth angle on the shear behavior of cement mortar coal composite structure.
Sci Rep
January 2025
College of Mining Engineering, Taiyuan University of Technology, Taiyuan, 030024, Shanxi Province, China.
The influence of interface morphology is of great importance on the shear behavior of the cement mortar-coal composite structure (CCCS) widely distributed in underground mines. In the present research, both the macroscopic- and microscopic failure characteristics of the CCCS with variable interface sawtooth angles (i.e.
View Article and Find Full Text PDFEvaluation of bond durability of different self-adhesive bioactive restorative systems to dentin.
Sci Rep
January 2025
Conservative Dentistry Department, Faculty of Dentistry, Mansoura University, Mansoura, Egypt.
This study aimed to compare the bonding efficacy three bioactive self-adhesive restorative systems to dentin. A total of 80 permanent human molars were utilized in this study. The occlusal enamel was removed to exposed mid-coronal dentin; 40 molars were used for microshear bond strength testing, while the remaining molars were used for micromorphological analysis of restoration/dentin interface.
View Article and Find Full Text PDFComprehensive evaluation of low-carbon cementitious materials prepared with industrial by-product calcium carbide residue (CCR) as alkali source.
Environ Res
January 2025
Science and Technology Innovation Center of Smart Water and Resource Environment, Northeastern University, Shenyang 110819, China; School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, China; Liaoning Institute of Technological Innovation in Solid Waste Utilization, Northeastern University, Shenyang 110819, China.
The preparation of low-carbon cementitious materials through the synergistic coupling of multiple solid wastes has great potential for development, which can improve the problems of resource shortage and environmental pollution. In this paper, a new type of supersulfated cement was developed by using calcium carbide residue (CCR) as an alkaline activator. The effects of CCR content on the mechanical properties and hydration behaviors of the samples under steam curing conditions were discussed.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!