高强混凝土早龄期抗压强度历时变化双参数模型研究  

Research on the Dual-parameter Model of Long-term Changes in Compressive Strength of High Strength Concrete at Early Age

作　　者：黄剑云 桑伟 朋茜 

机构地区：[1]宁波交通工程建设集团有限公司,浙江宁波315000 [2]宁波工程学院建筑与交通工程学院,浙江宁波315211

出　　处：《混凝土世界》2025年第4期25-29,共5页China Concrete

基　　金：浙江省自然科学基金资助项目(LY24E080010)。

摘　　要：针对高强混凝土早龄期抗压强度的评估问题,本文基于2种数学函数曲线的组合,提出了一种新的双参数预测模型,新模型比现有的单一曲线模型更加符合混凝土强度的增长规律;并基于不同文献的试验数据,将新模型与现有的3种模型进行了对比分析。结果表明:新模型的拟合平均误差和标准差约为现有模型的20%~50%,新模型预测得到的混凝土的60 d抗压强度与混凝土设计强度等级最为接近,该研究结论可为实际工程中混凝土强度的预测提供参考。To address the issue of evaluating the compressive strength of high strength concrete at an early age,this paper proposes a new dual-parameter prediction model based on a combination of two mathematical curves.This model is more in line with the growth law of concrete strength than existing single curve models.Based on experimental data from different literature,a comparative study is conducted between the new model and three existing models.The results show that the average fitting error and standard deviation of the new model are about 20%to 50%of the existing model.The new model's predicted compressive strength of concrete at 60 days is closest to the design strength grade of concrete,this research conclusion can provide a reference for predicting concrete strength in practical engineering.

关 键 词：高强混凝土 早龄期 抗压强度 数学模型 

分 类 号：TU528[建筑科学—建筑技术科学]