Pundienė Ina, Pranckevičienė Jolanta
Laboratory of Concrete Technology, Institute of Building Materials, Vilnius Gediminas Technical University, Linkmenų Str. 28, 08217 Vilnius, Lithuania.
Nanomaterials (Basel). 2023 Dec 7;13(24):3095. doi: 10.3390/nano13243095.
This research delves into the intricate dynamics between multi-walled carbon nanotubes (MWCNTs), air-entraining admixtures (AEAs), and a range of superplasticizers (SPs) in cementitious systems, shedding light on key aspects of construction material innovation. The focus is on how MWCNTs, AEAs, and specific SPs-namely, lignosulfonate (LS), polycarboxylate (PCE), and polyacrylate (PA)-influence the stability of foams and the viscosity and setting times of cement pastes. To assess the impacts of these components, we employed foam stability assessments, viscosity measurement techniques, electrical conductivity analysis, and evaluations of dispersion and setting times. Results indicate that MWCNTs enhance foam stability and viscosity, with the degree of improvement contingent on the type and concentration of SPs and the presence of AEAs. Notably, SPs, particularly PCE and PA, markedly influence the properties of cement paste, including increasing dispersion values and modulating setting times, especially when combined with MWCNTs and AEAs. The study concludes that strategically combining MWCNTs with specific SPs and AEAs alters the physical properties of cementitious materials significantly, underscoring the potential for customizing material design in the construction sector.
本研究深入探讨了多壁碳纳米管（MWCNTs）、引气剂（AEAs）和一系列高效减水剂（SPs）在水泥基体系中的复杂相互作用，揭示了建筑材料创新的关键方面。重点在于MWCNTs、AEAs和特定的SPs（即木质素磺酸盐（LS）、聚羧酸系减水剂（PCE）和聚丙烯酸盐（PA））如何影响泡沫的稳定性以及水泥浆体的粘度和凝结时间。为了评估这些组分的影响，我们采用了泡沫稳定性评估、粘度测量技术、电导率分析以及分散性和凝结时间评估。结果表明，MWCNTs提高了泡沫稳定性和粘度，改善程度取决于SPs的类型和浓度以及AEAs的存在。值得注意的是，SPs，特别是PCE和PA，显著影响水泥浆体的性能，包括提高分散值和调节凝结时间，尤其是与MWCNTs和AEAs结合使用时。研究得出结论，将MWCNTs与特定的SPs和AEAs进行策略性组合会显著改变水泥基材料的物理性能，突出了在建筑领域定制材料设计的潜力。
