石灰石-煅烧黏土-水泥(LC^(3))体系的水化动力学模型  

Hydration Kinetics Model of Limestone-Calcined Clay-Cement(LC^(3))System

作　　者：吴浪[1] 鲍蓉 戴健 雷斌[2] WU Lang;BAO Rong;DAI Jian;LEI Bin(School of Civil Engineering,Jiangxi Science and Technology Normal University,Nanchang 330013,China;School of Infrastructure Engineering,Nanchang University,Nanchang 330031,China)

机构地区：[1]江西科技师范大学土木工程学院,南昌330013 [2]南昌大学工程建设学院,南昌330031

出　　处：《材料导报》2024年第15期173-178,共6页Materials Reports

基　　金：国家自然科学基金(51968046,52268043);江西省主要学科学术和技术带头人培养计划-领军人才项目(20204BCJ22003)。

摘　　要：石灰石-煅烧黏土-水泥(LC^(3))是一种新型复合建筑材料,在满足水泥可持续生产和节能减排方面具有优良的应用前景。本工作通过考虑煅烧黏土和石灰石矿物掺合料的稀释效应、成核作用和火山灰反应等影响作用,提出了一种评估LC^(3)混凝土化学和力学性能的水化动力学模型。根据动力学模型,分析计算了不同掺量情况下LC^(3)胶凝体系的累计水化热、氢氧化钙含量和结合水总量。通过将模型分析结果与试验结果相比较,证明了所建立的模型可较好地模拟LC^(3)水泥胶凝体系的水化进程。结果表明,在一定掺量范围内,LC^(3)水泥胶凝体系的水化程度与掺量成正比,而氢氧化钙含量、结合水总量和累计水化热与之成反比,LC^(3)材料用于水泥辅助胶凝材料时的推荐掺量为25%~35%。Limestone-calcined clay-cement(LC^(3))concrete is a new type of composite building material that has a excellent application prospects in meeting the sustainable production of cement and energy conservation and emission reduction.This work proposed a hydration kinetics model for evaluating the chemical and mechanical properties of LC^(3)concrete by considering the dilution effect,nucleation effect,and volcanic ash reaction of calcined clay and limestone mineral admixtures.Based on the dynamic model,the cumulative hydration heat,calcium hydroxide content,and total bound water of the LC^(3)cementitious system with different dosages were analyzed and calculated.By comparing the model analysis results with the experimental results,it is proved that the established model can better simulate the hydration process of LC^(3)cement compound cementing system.The results show that within a certain range of dosage,the hydration degree of LC^(3)cement cementitious system is directly proportional to the dosage,while the calcium hydroxide content,total bound water,and cumulative hydration heat are inversely proportional to them.The recommended dosage of LC^(3)used as cementitious auxiliary cementitious material is 25%—35%.

关 键 词：石灰石-煅烧黏土-水泥(LC^(3)) 水化动力学 胶凝体系 矿物掺合料 

分 类 号：TQ172[化学工程—水泥工业]