铁粉对水泥砂浆强度和导热性能的影响

Influence of Iron Powder on the Strength and Thermal Conductivity of Cement Mortar

为研究一种具有更高导热效率且具备一定强度的填埋碳纤维发热线的道路回填材料,对M30的水泥砂浆分别内掺3%、5%、7%、10%质量分数的铁粉,研究不同铁粉掺量对水泥砂浆的抗压强度、抗折强度以及其导热系数的影响。结果表明:试块抗压强度与抗折强度均随着铁粉掺量的增大而逐渐减小,导热系数随着铁粉掺量的增大呈现先增大后减小的趋势;得到了合适的铁粉掺量,强度满足要求且导热系数达到最大值,为实际工程应用提供参考。

In order to study a kind of road backfill material with higher thermal conductivity efficiency and certain strength of landfill carbon fiber hot wire,the influence of different iron powder content on compressive strength,flexural strength and thermal conductivity of cement mortar was studied by mixing 3%,5%,7%and 10%iron powder into M30 cement mortar respectively.The results show that the compressive strength and flexural strength of the test block decreased gradually with the increase of the content of iron powder,and the thermal conductivity increased first and then decreased with the increase of the content of iron powder.The suitable content of iron powder was obtained.The strength met the requirements and the thermal conductivity reached the maximum value,which provides a reference for practical engineering application.