US-12617720-B2 - Basalt fiber reinforced concrete

Abstract

The present invention relates to a basalt fiber reinforced concrete, which includes: a cement slurry with a water-to-cement ratio between 0.3 and 0.5, and a slurry volume percentage between 15-25%; an aggregate with an aggregate volume percentage between 65% and 75%; a basalt fiber reinforcement with a fiber volume percentage between 0.2% and 1.00%; and a concrete admixture used to adjust the properties of the basalt fiber reinforced concrete.

Inventors

• Jieh-Haur CHEN
• Yu-Min Su
• Min-Chih Liao
• Yen-Yu Lin
• Cheng-Ching PENG

Assignees

• NATIONAL CENTRAL UNIVERSITY
• UAN TAN CO., LTD.

Dates

Publication Date

20260505

Application Date

20231006

Priority Date

20230727

Claims (8)

1. 1 . A basalt fiber reinforced concrete, comprising: a cement slurry with a water-to-cement ratio between 0.3 and 0.5, and a slurry volume percentage between 15-25%; an aggregate with an aggregate volume percentage between 65% and 75%; a basalt fiber reinforcement with a fiber volume percentage between 0.2% and 1.00%; and a concrete admixture used to adjust the properties of the basalt fiber reinforced concrete.
2. 2 . The basalt fiber reinforced concrete according to claim 1 , wherein the cement slurry further comprises one of a Portland cement, a Type I Portland cement, a Type II Portland cement, a Type III Portland cement, a Type IV Portland cement, a Type V Portland cement, an air-entraining Portland cement, a Type I air-entraining Portland cement, a Type II air-entraining Portland cement, a Type III air-entraining Portland cement, a slag cement, a fly ash cement, a volcanic ash cement, a masonry cement, an expansive cement, a waterproof cement, an oil well cement, a white cement, a magnesia oxychloride cement, a Japanese cement, or a combination thereof.
3. 3 . The basalt fiber reinforced concrete according to claim 1 , wherein the water-to-cement ratio is 0.30, 0.32, 0.35, 0.38, 0.40, 0.42, 0.44, 0.45, 0.46, or 0.50.
4. 4 . The basalt fiber reinforced concrete according to claim 1 , wherein the aggregate volume percentage is calculated according to the American Concrete Institute (ACI) proportioning design method.
5. 5 . The basalt fiber reinforced concrete according to claim 1 , wherein the fiber volume percentage is 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, or 1.0%.
6. 6 . The basalt fiber reinforced concrete according to claim 1 , wherein the concrete admixture is one selected from a superplasticizer, an air-entraining agent, a water reducer, a rapid setting agent, a retarding agent, an early strength agent, a water-reducing retarding agent, a water-reducing early strength agent, a high-performance water reducer, a high-performance water-reducing retarding agent, a plasticizer, a plasticizing and retarding agent, a pigment, a corrosion inhibitor, a shrinkage reducer, a freeze-thaw resistant agent, a pumping aid, a flowability concrete admixture, a special purpose admixture, and a combination thereof.
7. 7 . The basalt fiber reinforced concrete according to claim 1 , wherein the basalt fiber reinforcement has a length in range between 3-14 mm.
8. 8 . The basalt fiber reinforced concrete according to claim 1 , wherein the basalt fiber reinforced concrete has a compressive strength greater than 250 kgf/cm 2 (3,500 psi) and a fracture energy density greater than 250 J/m 3 .

Description

CROSS-REFERENCE TO RELATED APPLICATION This application claims priority benefit to Taiwan Invention patent application No. 112128241, filed on Jul. 27, 2023, in Taiwan Intellectual Property Office, the entire disclosures of which are incorporated by reference herein. FIELD The present invention relates to a basalt fiber reinforced concrete, in particular to a basalt fiber reinforced concrete with enhanced toughness and fracture energy by adding basalt fiber reinforcements to normal-weight concrete. BACKGROUND In the state of the art, solidified concrete can exhibit excellent compressive strength but lacks toughness due to its inherent natural properties. It means that the concrete can bear considerable weight without collapsing, while it has an inherent weakness against tensile and bending moments. Even with the addition of reinforced steel to strengthen the structure, known as reinforced concrete (RC), there is not much improvement. Given the nature of concrete, traditional concrete mix design methods tend to follow this natural characteristic, and the primary performance design is for compressive strength, while tensile and flexural strength, which represent toughness, are secondary considerations. In the field of civil engineering, concrete with high toughness is generally classified as high performance concrete (HPC) or ultra-high performance concrete (UHPC), which belong to the emerging category of construction materials in the field of civil engineering in recent years. In fact, high-toughness concrete has significant application value, including the ability to significantly improve the seismic resistance, crack resistance, and durability of structures, extend the service life of structures, and increase the operational efficiency and economic value, among other benefits. Based upon an international scale, high-toughness concrete has been widely applied in basic infrastructure projects such as transportation and water conservancy, including bridge engineering, dam engineering, tunnel engineering, elevated bridge engineering, high-speed railway engineering, retaining wall engineering, and so on. For instance, the most recent research and management team under the Pavement Added Structures (TOPS) project at the Federal Highway Administration (FHWA) in the United States has specifically begun to incorporate toughness design of civil materials into road design requirements, which covers integrating resilience design concepts into cement concrete material road designs, allowing the use of cement concrete material as an additional rigid pavement layer on existing rigid or flexible road surfaces. Further detailed considerations involve determining whether the two layers are bonded together in the resilience design. Especially in recent years, global warming has led to the frequent occurrence of extreme temperatures, heavy rains, and seismic events, causing significant impacts and damage to various foundation infrastructures. This has led to a high demand for the toughness performance of concrete in various engineering designs, including infrastructure projects. With this in mind, the development of high-toughness concrete has become an urgent issue. In view of the deficiencies/issues in the state of the art, there is a need to solve the above deficiencies/issues. Hence, the inventor has come up with the present invention of “Basalt Fiber Reinforced Concrete” after painstaking trials, research and perseverance to overcome the aforementioned deficiencies. The brief description of the present invention is disclosed as follows. SUMMARY The present invention relates to a basalt fiber reinforced concrete, in particular to a basalt fiber reinforced concrete with enhanced toughness and fracture energy by adding basalt fiber reinforcements to normal-weight concrete. The present invention provides a basalt fiber reinforced concrete. The basalt fiber reinforced concrete includes a cement slurry with a water-to-cement ratio between 0.3 and 0.5, and a slurry volume percentage between 15-25%; an aggregate with an aggregate volume percentage between 65% and 75%; a basalt fiber reinforcement with a fiber volume percentage between 0.2% and 1.00%; and a concrete admixture used to adjust the properties of the basalt fiber reinforced concrete. The above content described in the summary is intended to provide a simplified summary for the presently disclosed invention, so that readers are able to have an initial and basic understanding to the presently disclosed invention. The above content is not aimed to reveal or disclose a comprehensive and detailed description for the present invention, and is never intended to indicate essential elements in various embodiments in the present invention, or define the scope or coverage in the present invention. DESCRIPTION OF THE DRAWINGS A more complete appreciation of the invention and many of the attendant advantages thereof are readily obtained as the same become better understood by refe