New Anticracking Glass‐Fiber‐Reinforced Cement Material and Integrated Composite Technology with Lightweight Concrete Panels

Abstract

Glass-fiber-reinforced cement (GRC) is a widely used decorative material for wall facades. Conventional GRC products have poor crack resistance, low construction efficiency, poor integration, and few environmental benefits, hence failing to meet the requirements of building industrialization. To realize an integrated composite wall made from GRC and precast lightweight concrete (PLC) with a lasting anticrack effect, the anticracking properties of GRC material as well as the connection mode of GRC and PLC layers were studied. Through long-term shrinkage test, the influence of fiber content, rubber powder content, and expansion agent content on the crack resistance of GRC material was systematically analyzed. At the same time, the influence of connection mode on the crack resistance of the GRC layer after compositing with precast lightweight concrete (PLC) was analyzed. The results showed that adding fiber can effectively improve the flexural strength of the GRC and reduce drying shrinkage, whereas adding rubber powder can effectively improve its toughness and crack resistance. The addition of U-type expansion agent (UEA) can impart the cement mortar with a certain degree of microexpansion performance and help improve the drying shrinkage of the GRC. Compared with other compounding methods, the smooth connection of the GRC and PLC can effectively reduce the shrinkage of the GRC surface layer and improve its crack resistance. So, the new GRC material has good crack resistance performance and facade effect. These research studies provide an experimental basis for the large-scale application of the panel, and it has great advantages in improving the efficiency of prefabricated building construction.

Study of Technological Advancement and Challenges of Façade System for Sustainable Building: Current Design Practice

“…They are typically used They are used in high-end Panels are fixed to the metal framing and typically span between floors [65]. The Mainly in public and institutional buildings [56].…”

Bamboo stick diameter, volume and aspect ratios effect on the compressive behavior of bamboo sticks reinforced concrete mixed with sea sand and seawater

“…Many researchers have developed various ways to increase the toughness of concrete structural members by reinforcing with natural fibres including bamboo, coir, malva, sugarcane, banana, hemp, wheat straw, etc. [17][18][19][20][21]. Since 1950, bamboo bars made of a full culm or half-culm bamboo have been used for concrete reinforcement [22].…”

A Review on the Mechanical Behaviour of Bamboo Reinforced Concrete Beams

“…Despite its increasing strength over time, concrete is brittle and weak under tensile loads [28]. Due to the nonrenewable aspect and high cost of steel, many researchers have developed various ways to increase the ductility of concrete by reinforcing it with natural fibres such as coir, malva, sugarcane, kenaf bast, bamboo, banana, pineapple leaf, date, sisal, vakka, palm, jute, hemp, elephant grass, Hibiscus cannabinus, abaca leaf, ramie bast, flax, sansevieria leaf, and wheat straw [28][29][30][31][32]. Since 1950, bamboo has been used for concrete reinforcement [33].…”