CAJ | 학술논문

基于相似材料配比的正交试验方案，制备了不同成分和配合比的相似材料试样，量测了各试样的导热系数值，研究了相似材料中含水率、胶结物及砂胶比等变化对导热系数量值的影响。研究结果表明：由于水和空气的导热系数差异较大，试样中含水率变化对导热系数量值的影响显著；胶结物在试样中所占比例小，其成分因水化引起的孔隙率变化有限，胶结物成分和配比变化对导热系数量值的影响可以忽略；受砂与胶结物之间的相互作用，胶结物成分和配比方案将改变砂胶比对导热系数量值的影响。当胶结物成分为石灰和石膏时，影响导热系数值的因素依次为含水率、砂胶比和胶结物，并随着砂胶比的增大，导热系数值在增加，但增幅逐渐减小；当胶结物成分为水泥和石膏时，影响导热系数值的因素依次为含水率、胶结物和砂胶比，但随着砂胶比的增大，导热系数量值变化可以忽略。
기우상사재료배비적정교시험방안，제비료불동성분화배합비적상사재료시양，량측료각시양적도열계수치，연구료상사재료중함수솔、효결물급사효비등변화대도열계수량치적영향。연구결과표명：유우수화공기적도열계수차이교대，시양중함수솔변화대도열계수량치적영향현저；효결물재시양중소점비례소，기성분인수화인기적공극솔변화유한，효결물성분화배비변화대도열계수량치적영향가이홀략；수사여효결물지간적상호작용，효결물성분화배비방안장개변사효비대도열계수량치적영향。당효결물성분위석회화석고시，영향도열계수치적인소의차위함수솔、사효비화효결물，병수착사효비적증대，도열계수치재증가，단증폭축점감소；당효결물성분위수니화석고시，영향도열계수치적인소의차위함수솔、효결물화사효비，단수착사효비적증대，도열계수량치변화가이홀략。
On the basis of the orthogonal experimental design of the ratio of similar materials,this paper prepares different composition and different mix ratios of similar material samples,and measures the thermal conductivity values of each sample.It examines the influences of the changes of moisture content,cement and sand-binder ratio upon the values of thermal conductivity.The results show that the change of moisture content in the samples has a significant impact on the value of thermal conductivity due to the significant difference between the respective thermal conductivity of water and air.The influence caused by the change of cement composition and ratio on the values of thermal conductivity can be ignored since the cement only accounts for a small proportion in the samples and the change of porosity is slightly caused by hydration.Under the interaction between sand and cement,cement composition and ratio can influence the effect of sand-binder ratio change upon thermal conductivity.When the cement consists of lime and gypsum,the factors affecting thermal conductivity are moisture content,sand-binder ratio,and cement composition.As the sand-binder ratio increases,the value of thermal conductivity can rise at a gradually decreasing growth rate.Yet when the cement consists of cement and gypsum,the factors affecting thermal conductivity are moisture content,cement composition,and sand-binder ratio.The change in thermal conductivity can be ignored as the sand-binder ratio increases.