Enhancing foam stability and performance in foam concrete using para-aramid nanofiber

Abstract

Foam concrete is known for its lightweight and insulating properties. However, foam instability remains a challenge, leading to compromised mechanical strength and durability. This study investigates the use of para-aramid nanofibers (PANF) as an effective foam stabilizer. The inclusion of 0.12 % PANF by weight of foaming agent significantly enhanced foam stability, resulting in improved pore structure and reinforced air-void walls. Compared to conventional foam concrete, PANF-stabilized foam concrete exhibited a 74.4 % reduction in foam drainage rate, a 66.67 % increase in compressive strength, a 7.5 % reduction in water absorption, and a 27.45 % improvement in thermal conductivity. These findings highlight PANF as a promising stabilizer for enhancing foam concrete properties, offering a practical solution for developing lightweight, durable construction materials.