This research examines how curing temperature affects in the development of CaO-activated cementless GGBFS high-strength concrete. Compressive strength tests were conducted on samples cured at 50 °C, 70 °C, and 90 °C for 12 h, with additional evaluation after 3 and 28 days of water curing. TGA, FT–IR, NMR, MIP, and BET analyses further investigated the microstructural evolution. Findings show that higher temperatures significantly enhance pozzolanic reactions, leading to initial strengths of up to 95.6 MPa and maintaining high levels after 28 days. Elevated temperatures enhances the formation of denser and more stable hydration products, predominantly C–S–H, confirmed by spectroscopic analysis which relates with increased binder reactivity to enhanced compressive strength. Additionally, improved porosity refinement at higher temperatures correlates with increased strength. This research highlights the dual benefit of using cementless high-strength concrete: achieving substantial strength and reducing CO2 emissions, supporting its potential for high-strength applications with reduced environmental impact.

中文翻译：

---

养护温度对GGBFS基无水泥高强混凝土水化特性的影响


本研究探讨了养护温度如何影响 CaO 活化无水泥 GGBFS 高强度混凝土的开发。对在50℃、70℃和90℃下固化12小时的样品进行抗压强度测试，并在水固化3天和28天后进行额外评估。 TGA、FT-IR、NMR、MIP 和 BET 分析进一步研究了微观结构的演变。研究结果表明，较高的温度显着增强火山灰反应，导致初始强度高达 95.6 MPa，并在 28 天后保持高水平。光谱分析证实，升高的温度促进了更致密、更稳定的水化产物（主要是 C-S-H）的形成，这与增加的粘合剂反应性和增强的抗压强度有关。此外，在较高温度下改进的孔隙率细化与强度的增加相关。这项研究强调了使用无水泥高强度混凝土的双重好处：实现显着的强度并减少二氧化碳排放，支持其高强度应用的潜力，同时减少对环境的影响。