Ultrasonic descriptors of accelerated carbonation in Portland cement pastes: time-domain, phase, and harmonic features validated by FTIR

This dataset contains the experimental and processed data associated with the manuscript “Ultrasonic descriptors of accelerated carbonation in Portland cement pastes: time-domain, phase, and harmonic features validated by FTIR”. The dataset includes ultrasonic through-transmission measurements obtained from Portland cement pastes with water-to-cement ratios of 0.4, 0.5, and 0.6 subjected to accelerated carbonation at 4% CO2 for up to 120 days. The data support the analysis of normalized cumulative energy, total signal energy, energy-spreading duration, phase-slope evolution, and relative third-harmonic content. FTIR data used as an independent indicator of carbonation progression and TGA data used as an initial reference for CaCO3 content are also included where applicable. Processed datasets corresponding to the figures reported in the manuscript are provided together with a README file describing the organization of the files and the relevant variables.本数据集包含与题为《硅酸盐水泥浆体加速碳化的超声表征：经傅里叶变换红外光谱（FTIR）验证的时域、相位和谐波特征》的手稿相关的实验与处理后数据。 本数据集包含水胶比分别为0.4、0.5、0.6的硅酸盐水泥浆体在体积分数4%的二氧化碳环境下进行最长120天加速碳化试验所获得的超声穿透传输测量数据。该数据集可支撑归一化累积能量、总信号能量、能量扩散时长、相位斜率演化以及相对三次谐波含量等指标的分析。 本数据集还包含用于表征碳化进程的独立指标——傅里叶变换红外光谱（FTIR）数据，以及作为碳酸钙（CaCO3）含量初始参考依据的热重分析（TGA）数据。本数据集同时提供了与手稿中配图对应的处理后数据集，以及一份说明文件组织结构与相关变量的README文件。