Analysis on the Triaxial Shear Behavior and Microstructure of Cement‐Stabilized Clay Reinforced with Glass Fibers

Abstract

A series of triaxial compression tests were conducted to investigate the influence of the fiber content and confining pressure on the shearing characteristics of cement-stabilized clay reinforced with glass fibers. The glass fiber contents were 0, 1‰, 2‰, 3‰, and 4‰ by weight of the dry soil. The stress strain and volume change behavior, shear strength, and energy absorption of the test specimen were obtained. The results indicate that the inclusion of glass fibers can increase the shear strength, inhibit the volumetric dilation of the test specimen, and improve its brittle behavior. The cohesion of the cement-stabilized clay reinforced with 4‰ glass fiber content is 2.8 times greater than that of the cement-stabilized clay. The effect of the fiber content on the friction angle is not obvious. It is found that the glass fiber reinforcement is more substantial under a low confining pressure. The scanning electron microscopy test results show that the surface of the glass fiber is wrapped with cement hydrate crystals, which increases the bite force and friction between the fiber and the soil particles. A single fiber is similar to an anchor in the soil, which enhances the mechanical properties of the cement-stabilized clay reinforced with fibers.

Case Evaluation of Structural Strength Improvement of Lateritic Soil Using Selected Binders

“…The observed increase in liquid limit (LL) with higher sisal fiber content can be attributed to the water absorption capacity of sisal. This observation aligns with findings reported by Sani et al, [40] and Bo et al, [41]. On the two treatment methods used, It could be observed that soil treated with plastic strips-cement mix recorded slightly lower liquid limit values when compared with samples treated with sisal fiber.…”

Assessment of Effect of Glass Fiber on the Geotechnical Properties of Black Cotton Soil

“…Since, CBR value at 2.5 mm penetration is often greater than CBR value at 5 mm penetration, it is usually preferred in pavement design. The test is repeated one more time when CBR value at 5 mm penetration is found to be greater than that at 2.5mm penetration [26]. Fig.…”

“…Because clayey soils volume change behavior is so sensitive to moisture content, expansive soils are used difficult in engineering applications [2]. A variety of soil stabilization techniques have been used to stabilize expansive soil, including fly ash [11] RBI Grade-81 [12], Steel fiber [13], Rice husk [14], glass fiber [15][16][17][18][19][20][21][22][23][24][25][26], bagasse ash [4] [27-28], lime [27, [29][30], cement [26,31], corn straw ash [32], Polypropylene Fiber [10,18,33], Basalt Fiber [34], Coir Fiber [35], Sisal Fibre [36], Jute Fiber [37] and Plastic Waste Powder [38] etc. When the area to be treated is limited, reinforcements are especially trustworthy and successful at strengthening weak soil.…”

Study on the shear and deformation characteristics of geogrid-reinforced gravelly soils based on large-scale triaxial tests

“…Their results and those of many other researchers, such as Tong et al (2019) et al, show that the shear strength of clay with fibers increases with increasing fiber content and that the cohesion and internal friction angle of the clay increase with reinforcement. According to Qu and Sun (2016) and Ruan et al (2020), cohesive soils reinforced with fiber exhibit less expansibility as the fiber concentration increases. Yang et al (2023) proved that when the mass per unit area of the geotextile increased, the interface friction between the soil and geotextile increased, and the cracking of the soil was effectively inhibited.…”