Impact resistance of self-sensing engineered cementitious composite (ECC) under different temperatures
Year: 2024
Type: article
Abstract: Self-sensing engineered cementitious composite (ECC) is inevitably susceptible to the effects of impact loads when it is applied to structural health monitoring . In this paper, the impact resistance of self-sensing ECC under varying temperatures was investigated by experiments. Specimens comprising cement mortar , conventional ECC, and self-sensing ECC, all featuring identical water-binder ratios, were prepared and subjected to compressive and tensile strength evaluations, as well as tensile ductility measurements. Subsequently, the drop-weight impact tests were conducted on these three specimens at the temperatures of −50℃, −30℃, −10℃, 20℃, 50℃ and 100℃, respectively. Detailed analyses were carried out on the resulting impact loads , impact durations, dent depths , and failure modes. Our findings reveal that the compressive strength of cement mortar surpasses that of both conventional ECC and self-sensing ECC. Furthermore, conventional ECC and self-sensing ECC exhibit ultimate tensile strains of 4.6 % and 6.7 %, respectively. At the same drop-height of impactor, the maximum impact force decreases with the increase of temperature. At cold temperature, the specimen exhibit heightened impact forces coupled with abbreviated impact durations. Self-sensing ECC demonstrates a decreased maximum impact force and an extended duration compared to conventional ECC. The cement mortar specimen shows brittle failure , while both self-sensing ECC and conventional ECC align with the scabbing failure mode. Self-sensing ECC with a smaller scabbing thickness has preferable impact resistance and deformability .
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,110
OpenAlex ID: W4405012437