Abstract Carbon nanotubes (CNTs) with weight percent of 5.0%, 10.0% and 15.0% were added into the cement matrix to fabricate CNT reinforced cement-based composites (CNTs/CC) by mixing and dry compression shear methods. Seebeck coefficient, electrical conductivity and thermal conductivity of the as-received CNTs/CC were measured and analyzed in detail. The CNTs/CC exhibits the thermoelectric behavior of p-type semiconductor. CNTs were dispersed uniformly in cement matrix by compression shear stress, which promoted a relatively high electrical conductivity (0.818 S/cm) and Seebeck coefficient (57.98 μV/°C) of CNTs/CC. Combining with their lower thermal conductivity ranged from 0.734 to 0.947 W m−1 K−1, the CNTs/CC shows the highest thermoelectric figure of merit (ZT) has reached 9.33 × 10−5, Which is benefit to the applications in large-scale energy harvesting in the buildings and pavements with low cost in the future cities.

中文翻译：

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压缩剪切法制备碳纳米管增强水泥基复合材料的热电性能

摘要 在水泥基体中加入重量百分比为5.0%、10.0%和15.0%的碳纳米管（CNTs），通过混合和干压剪切法制备碳纳米管增强水泥基复合材料（CNTs/CC）。详细测量和分析了原样的 CNTs/CC 的塞贝克系数、电导率和热导率。CNTs/CC 表现出 p 型半导体的热电行为。CNTs 通过压缩剪切应力均匀地分散在水泥基体中，这促进了 CNTs/CC 相对较高的电导率（0.818 S/cm）和塞贝克系数（57.98 μV/°C）。结合它们从 0.734 到 0.947 W m-1 K-1 的较低热导率，CNTs/CC 显示最高的热电品质因数 (ZT) 已达到 9.33 × 10-5，