Flexural and impact behavior of textile reinforced concrete panel

Abstract

Steel is susceptible to corrosion and requires a significant concrete cover, which increases self-weight and cost. Therefore, an alternative to traditional reinforcements is needed. Textile reinforced concrete (TRC) is a favorable composite using textile material as reinforcement with a fine-grained concrete matrix. This study represents a comparison between different TRCs having different textile reinforcements subjected to flexural bending and impact loading. Four types of textiles—glass (GT), a square oriented galvanized iron (SGIT), diagonal pattern galvanized iron (DGIT), and carbon (CT) are used. All four types of textiles are used to prepare 400 x 50 x12 mm textile reinforced mortar (TRM) and tested for tensile strength properties. This study tests TRC panel and plate samples by three-point bending and drop-weight impact methods. The uniaxial tensile strength test of the textiles shows that CTs can take around 2.3 times higher tensile load than SGITs. However, their tensile load capacity is almost similar in the case of TRM, where SGIT textile shows about 30% higher extension. The flexural bending test of the TRC panels shows that the load-carrying ability increases nearly two times with the increase of 25 mm in thickness even when the number of reinforcement layers remains the same. With the increase in thickness, SGIT textile shows better performance. Drop-weight impact test of the TRC plates shows that the impact energy absorption in CT textile plates is up to two times higher than SGIT plates for various thicknesses. This study summarizes that CT shows overall better performance than SGIT.

Jute textiles with enhanced interfacial bonding as reinforcement for cementitious composites

“…64 Since this research applied jute fabric and eucalyptus pulp, the short fiber (pulp) enhances the first-crack stress since well-distributed fibers in cement-based matrices can form bridges and arrest micro-cracks and, thus, limiting their development. 65,66 In this way, for all samples under bending tests presented after DIC images (Figure 9), stress areas are only near the textile position (red color), and there are no failures at the back of the specimen (Figure 9(a)).

Figure 9.Representative images of the location of cracks (represented by warmer colours, such as red) of composites made by DIC: (a) back of specimen at the beginning of the test, (b) Side of specimen at the beginning of the test.

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“…64 Since this research applied jute fabric and eucalyptus pulp, the short fiber (pulp) enhances the first-crack stress since well-distributed fibers in cement-based matrices can form bridges and arrest microcracks and, thus, limiting their development. 65,66 In this way, for all samples under bending tests presented after DIC images (Figure 9), stress areas are only near the textile position (red color), and there are no failures at the back of the specimen (Figure 9(a)).…”

Physical, Mechanical, and Durability Properties of Concrete with Class F Fly Ash

“…It is approximated that each 10% increment of FA should let a water reduction of 3% at minimum (Thomas, 2007). The optimum value of FA is about 30%-40% of cement for normal concrete (Golewski, 2018;Islam et al, 2022;Oner et al, 2005) and 10% of cement for high strength concrete (Fantu et al, 2021). However, the amount may vary from less than 5% to more than 40% depending on the properties of the FA and cement and the desired properties of the concrete (ACI 225R, 2016).…”