Textile

Epoxy

Geotechnical engineering

Materials science

Geology

Mortar

Matrix (chemical analysis)

Cement

Composite material

Fiber

Fracture (geology)

Yarn

Reinforcement

Basalt fiber

Composites Part B Engineering

Textile reinforced concretes (TRCs) have many extraordinary features that make them a future-ready material exposed to complex environmental situations. However, current knowledge related to TRCs under mechanical loading and environmental conditions is not fully explored as compared to conventional fiber reinforced concretes. The present work investigates the quasi-static pullout performance of single-yarn and textile type (AR-glass and basalt fiber) reinforced cement mortars under different temperatures (25 °C, 100 °C, 300 °C and 600 °C). The pullout tests were carried out at loading rates of 0.25, 2.5 and 25 mm/min on an MTS load frame setup. The reinforcement embedded length in the cement matrix was 30 mm. The pullout testing results were evaluated in terms of initial debonding force and maximum pullout (or peak) load, displacement at initial debonding force, and energy absorption. The experimental results indicated that the textile type reinforcement was better than the yarn type reinforcement. The mechanical properties of TRCs were sensitive to loading rate and temperatures. In addition, the scanning electronic microscopy (SEM) images of the fractured samples tested at different loading rates and temperatures highlighted that quasi-static loading rate variations did not affect the fracture pattern. However, the temperature variation highly affected the epoxy resins used for filament bonding or coating in the reinforcements which may critically affect their interfacial performances.

Pullout behaviors of single yarn and textile in cement matrix at elevated temperatures with varying loading speeds