In this study, the effect of curing temperature on the properties of slag cement concrete after high-temperature exposure was studied, and elevated curing temperature (45 ± 2 °C and 95% relative humidity (RH)) was selected to compare with the standard curing temperature (20 ± 2 °C and 95%RH). Four different concrete mixes with the same mix proportion, except for different slag replacement ratios, were used: 0% (reference), 30% (slag), 50% (slag), and 70% (slag). After high-temperature exposure at 200, 400, 600, and 800 °C, the effect of slag replacement, high temperature, and curing temperature on the compressive strength and mineralogical and microstructural properties of slag cement concrete were studied. Test results indicated that the compressive strength of concrete cured for 7 d at elevated temperatures increased by 28.2, 20.7, 28.8, and 14.7% compared with that cured at the standard curing condition at slag percentages of 0, 70, 50, and 30%, respectively. X-ray diffraction (XRD) and Scanning electron microscope (SEM) results revealed that concrete cured at elevated temperatures exhibited a more condensed phase and contained a higher percentage of hydrates than that cured for 7 d in the standard curing condition. However, after 56 d of curing, concrete in the standard curing condition exhibited a more stable phase and a higher concentration of hydrates.

在这项研究中，研究了养护温度对高温暴露后矿渣水泥混凝土性能的影响，并选择了提高的养护温度（45±2°C和95％相对湿度（RH））与标准固化温度（20±2°C和95％RH）。除渣替代率不同外，使用四种具有相同混合比的不同混凝土混合料：0％（基准），30％（矿渣），50％（矿渣）和70％（矿渣）。在200、400、600和800°C的高温下暴露后，研究了矿渣替代，高温和固化温度对矿渣水泥混凝土的抗压强度以及矿物学和微观结构特性的影响。测试结果表明，在高温下固化7天的混凝土的抗压强度分别提高了28.2、20.7、28.8和14。与在标准养护条件下分别以0、70、50和30％的炉渣百分比养护的养护相比，养护的养护能力为7％。X射线衍射（XRD）和扫描电子显微镜（SEM）结果表明，与在标准养护条件下养护7 d的混凝土相比，在高温下养护的混凝土表现出更多的凝结相和更高的水合物百分比。然而，在养护56天后，在标准养护条件下的混凝土表现出更稳定的相和更高的水合物浓度。X射线衍射（XRD）和扫描电子显微镜（SEM）结果表明，与在标准养护条件下养护7 d的混凝土相比，在高温下养护的混凝土表现出更多的凝结相和更高的水合物百分比。然而，在养护56天后，在标准养护条件下的混凝土表现出更稳定的相和更高的水合物浓度。X射线衍射（XRD）和扫描电子显微镜（SEM）结果表明，与在标准养护条件下养护7 d的混凝土相比，在高温下养护的混凝土表现出更多的凝结相和更高的水合物百分比。然而，在养护56天后，在标准养护条件下的混凝土表现出更稳定的相和更高的水合物浓度。