Abstract
The rapid development of modern society has increased the demand for high-performance geo-materials. As an advanced cementitious composite, fiber-reinforced concrete has attracted much attention and has been widely applied to various buildings and civil infrastructure. A basalt fiber-reinforced concrete is proposed as an advanced geo-material and the mechanical and thermal properties were investigated in this study. The basalt fiber-reinforced concrete was compared with ordinary concrete to confirm its superiority by determination of the physical parameters, static compressive test, and dynamic compressive test. The static compressive test was performed using the YAW-2000C constant stress pressure experimental machine under different heating temperatures and cooling methods, while the dynamic compressive test was performed using the 75-mm split-Hopkinson pressure bar under different loading rates, heating temperatures, and cooling methods. For the basic physical parameters, it was found that the mass loss and wave velocity of concrete decrease with the increase of the temperature. In the static compressive test, the static compressive strength for both the ordinary concrete and the fiber-reinforced concrete decreased with the increase of the temperature, and greater strength was observed with the air-cooled compared to the water-cooled method. It was found that the strength of basalt fiber-reinforced concrete is greater than that of ordinary concrete. In the dynamic compressive test, the strength increased with an increasing loading rate and descended with an increasing temperature, while for the same heating temperature and loading rate, water cooling produced more irregular and smaller fragments than air cooling. The dynamic compressive strength of basalt fiber-reinforced concrete was bigger than that of ordinary concrete.
Highlights
As one of the most promising advanced geo-materials, concrete is widely used in geoengineering owing to its wide material availability, good workability, high strength, and low cost
Based on the high-temperature treatment, the mass loss of the ordinary concrete and the basalt fiber-reinforced concrete is presented in Tables 3 and 4
YAW-2000C constant constant stress stress pressure pressure experimental experimental machine machine was used to carry out the static compressive test, and the split-Hopkinson was used to carry out the static compressive test, and the split-Hopkinson pressure pressure bar bar was was used used to to carry carry out out the the dynamic dynamic impact impact test, test, and and the the static static compressive compressive strength strength and and dynamic strength of dynamic compressive compressive strength of ordinary ordinary concrete concrete and and basalt basalt fiber-reinforced fiber-reinforced concrete concrete under various of heating temperatures and cooling methods under various of heating temperatures and cooling methods (air-cooled method) were were investigated
Summary
As one of the most promising advanced geo-materials, concrete is widely used in geoengineering owing to its wide material availability, good workability, high strength, and low cost. In the 20th century, concrete was extensively developed and became one of the most frequently used materials in construction [1]. This structure is susceptible to fire and dynamic loading. It is imperative to study the thermal and dynamic behaviors of concrete with various hightemperature treatments. Ultra-high-performance concrete (UHPC) technology is implemented to develop advanced concrete, which has superior mechanical properties and better durability than normal or traditional concrete. Many concretes incorporate fibers to increase the tensile strength and crack resistance
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