Effect of Basalt Fiber on Static and Dynamic Mechanical Properties of Metakaolin‐Based Cement Clay

Abstract

To investigate the effects of basalt fiber content on the mechanical properties and microstructure characteristic of metakaolin-based cement clay, the static and dynamic uniaxial compressive and splitting tensile, nuclear magnetic resonance (NMR), and scanning electron microscope (SEM) tests were performed to study the stress-strain curves, static and dynamic peak stress, pore distribution characteristic, and reinforcement mechanism. In this research, the basalt fiber with the length of 12 mm were selected and the ratios between fiber and dry soil were 0%, 0.5%, 1.0%, 1.5%, and 2.0%, respectively. The obtained results showed a noticeable difference of stress-strain curve characteristics in the static and dynamic compressive tests. A positive correlation between deformation modulus and compressive strength was found for both static and dynamic tests. The addition of basalt fiber could efficiently increase the static and dynamic strengths of metakaolin-based cement clay, and the increment 66.15% and 74.63% was observed at 1.0% basalt fiber content for static and dynamic compressive strengths, respectively, while the corresponding increment values were 93.75% and 97.62% for its splitting tensile strengths, respectively. The basalt fiber could decrease the porosity of cement clay; moreover, the reinforcement mechanism of metakaolin and basalt fiber to cement clay was analyzed based on the SEM test results.

Recent Progress in Limestone-Calcined Clay Cement (LC3): A Review

“…In this regard, when dynamic loads affect traditional concrete structures -winds or earthquakes -they are easily damaged, causing massive economic casualties. Recently, damped materials such as fiber -the most popular additive- [48], rubber [49], and polymer latex [50] became significantly considered options for enhancing the dynamic behavior of cementitious composites. The fiber sustains part of the stress through crack bridging and toughness enhancement, energy consumption, and ductility [4].…”

Study on Mechanical Properties and Microstructure of Fly-Ash-Based Geopolymer Solidified Waste Mud

“…After establishing a linear model with UCS as an independent variable, the rate between E 50 and UCS is gained for measuring the toughness of this material. The multiplicative relationship between E 50 and UCS may vary for different types of soils, such as 18 to 53 for cement-stabilized zinc-contaminated soil (Du et al 2013), 51 to 80 for sandy soil (Wang et al 2018), or 53 to 95 for basalt ber and metakaolin-based cement clay (Huang et al 2020). In this study, the linear ratio of E 50 to UCS is about 39 with a correlation degree of 0.938, and the difference of that may be related to the high water content and clay composition.…”