Preparation and piezoresistive properties of carbon fiber-reinforced alkali-activated fly ash/slag mortar
Preparation and piezoresistive properties of carbon fiber-reinforced alkali-activated fly ash/slag mortar
复制标题
碳纤维增强碱激发粉煤灰/矿渣砂浆的制备及压阻性能
DOI：
10.1016/j.conbuildmat.2019.06.134
复制
发表时间：
2019-10-20
影响因子：
7.4
通讯作者：
Zhang, Z.
中科院分区：
文献类型：
--
作者：
Deng, L.;Ma, Y.;Zhang, Z.
本研究提出了一种新型导电砂浆，并将碱活化粉煤灰/矿渣（AAFS）与碳纤维复合制备。研究了碳纤维增强AAFS （CF-AAFS）砂浆的和易性、力学性能、电阻率和压阻性能，并与碳纤维增强水泥砂浆（CF-CM）进行了比较。结果表明，与相同碳纤维含量的CF-CM相比，CF-AAFS具有更好的和易性和更高的抗压强度（28 d时为66 MPa）。当碳纤维含量为0.2 vol%时，CF-AAFS砂浆的电阻率从3313 ω降低。cm到165 ω。28 d时达到渗漏阈值。碳纤维含量仅为0.1 vol%的AAFS砂浆在单调压缩和循环压缩下均表现出良好的压阻性。因此，CF-AAFS被认为是一种很有前途的自感结构材料。(C) 2019 Elsevier Ltd.版权所有。
In this study, a novel type of conductive mortar was proposed and prepared by alkali-activated fly ash/slag (AAFS) combined with carbon fibers. The workability, mechanical properties, electrical resistivity and piezoresistive properties of carbon fiber-reinforced AAFS (CF-AAFS) mortar were investigated and compared with carbon fiber-reinforced cement mortar (CF-CM). It was found that CF-AAFS exhibited much better workability and significantly higher compressive strength (>66 MPa at 28 days) than CF-CM with the same carbon fiber content. With 0.2 vol% carbon fibers, the electrical resistivity of CF-AAFS mortar decreased from 3313 Omega.cm to 165 Omega.cm at 28 days, reaching the percolation threshold. AAFS mortar with only 0.1 vol% carbon fiber content exhibited good piezoresistivity under both monotonic and cyclic compression. Therefore, CF-AAFS was regarded as a promising material in the use of self-sensing structure in construction. (C) 2019 Elsevier Ltd. All rights reserved.