Investigation on the alkali resistance of basalt fiber and its textile in different alkaline environments

In order to obtain the high performance cement-based consistent materials，the enhancement effect of basalt fiber was studied to develop the building mortar with a high flexural strength . Three factors such as basalt fibers fraction，water-cement ratio and sand-lime ratio are studied on compressive and flexural strength on 7 days and 28 days through the orthogonal experimental design and statistical analysis. According to project needs, the best combination of flexural strength is optimized. The enhancement mechanism and damage features are analyzed and evaluated by SEM, the result shows that the basalt fiber as enhanced component have a very good flexural strength enhancement effect, the maximum increased rate will reach 2.91 times. The effect on the strength of different age period is remarkable with different fiber fraction which is far greater than the water-cement ratio and sand-lime ratio. Basalt fiber have better physical and mechanical properties and better alkali resistance, some performance are second only to carbon fiber, and the cost of basalt fiber is far lower than carbon fiber, So the basalt fiber have a broad application prospects in the field of cement-based composite materials.

Download Full-text

Effect of the Addition of ZrSiO4 on Alkali-Resistance and Liquidus Temperature of Basaltic Glass

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.766.145 ◽

2018 ◽

Vol 766 ◽

pp. 145-150

Author(s):

Napaporn Vaiborisut ◽

Chanittha Chunwises ◽

Dararat Boonbundit ◽

Sirithan Jiemsirilers ◽

Apirat Theerapapvisetpong

Keyword(s):

Liquidus Temperature ◽

Glassy Phase ◽

Glass Composition ◽

Glass Fibers ◽

Basalt Fiber ◽

Alkali Resistance ◽

Cement Matrix ◽

X Ray Diffraction ◽

Basalt Glass ◽

Zirconium Silicate

Basalt fiber has been used as a reinforced material in cement-based materials because it has higher mechanical strength and cheaper than common silicate based glass-fibers. However, silicate-based glass fibers have low alkali resistance especially in cement matrix composite. In this work, we studied the improvement of alkali resistance by addition of zirconium silicate (ZrSiO4) in original basalt glass composition. The batch of basalt glass with additional ZrSiO4 contents of 0.00, 2.50, 5.00, 7.50 and 10.00 wt% were melted at 1500 °C. The liquidus temperature (TL) is important in for the fiber glass manufacturing. It need to formulate glass composition which requires a lower melting temperature and is crystallization resistant. TL as a function of composition is usually determined experimentally. In this study, glassy phase was determined by X-ray Diffraction (XRD). The glass transition temperature (Tg), the crystallization temperature (Tc) and TL were analyzed by Differential Thermal Analysis (DTA). The results found that the addition of ZrSiO4 in a basalt glass batch increased Tg while Tc of each sample was closed to original basalt fiber. Moreover, the alkali resistance of these glasses increased with an increasing of ZrSiO4 content. However, excessive ZrSiO4 contents (7.50 and 10.00 wt%) resulted in crystallization of ZrO2 which separated from glassy phase.

Download Full-text

Evaluation of Operational Properties of Composite Reinforcement Used in Concrete Structures

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.880.57 ◽

2014 ◽

Vol 880 ◽

pp. 57-61

Author(s):

Viktor V. Rodevich ◽

Artem A. Ovchinnikov ◽

Elena V. Shilnikova

Keyword(s):

Experimental Studies ◽

Basalt Fiber ◽

Lightweight Aggregate ◽

Alkali Resistance ◽

Lightweight Aggregate Concrete ◽

Performance Study ◽

Building Envelopes ◽

Satisfactory Performance ◽

High Alkali ◽

Composite Reinforcement

The paper is devoted to the study of composite reinforcement made of glass fiber and basalt fiber, in particular their operational properties under the aggressive alkaline lightweight aggregate concrete environment. Their thermal resistance being sufficiently less than that of the regular steel composites they may be used in three-layered building envelopes to provide enhanced thermal properties. However there is lack of data and experimental results on the topic. Previous research indicated high alkali resistance of basalt fiber reinforcement, but there is a need in further studies. For the objective of the composite reinforcement that is used as flexible connectors for layer wall panels, a series of experimental studies. Research data have shown satisfactory performance study of flexible links.

Download Full-text

Investigation on the Alkali-Resistance Properties of Basalt Fiber Reinforced Plastics Bars in Concrete

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.284-286.182 ◽

2011 ◽

Vol 284-286 ◽

pp. 182-186 ◽

Cited By ~ 1

Author(s):

Jun Long Zhou ◽

Chun Xia Xu ◽

Shi Yong Jiang ◽

Bing Hong Li ◽

Zhong Wen Ou

Keyword(s):

High Temperature ◽

Basalt Fiber ◽

Alkali Resistance ◽

Fiber Reinforced ◽

Reinforced Plastics ◽

Temperature Method ◽

New Type ◽

Fiber Reinforced Plastics ◽

Marine Engineering

As a new type of building material, Basalt Fiber Reinforced Plastics is employed in concrete in place of steel reinforcement under such strongly-corrosive environment as marine engineering projects to avoid durability problem caused by corrosion. But BFRP bars’ alkali-resistance must be considered and studied. In this study, BFRP was soaked in saturated Ca(OH)2 solution and its tensile strength was measured through long-period immersion and high-temperature immersion experiments respectively. Besides, accelerated high-temperature method was adopted to detect its main ingredients: continuous Basalt fiber and resin. The results indicate that BFRP has poor alkali-resistance and its alkali-resistance must be improved if it is applied in concrete for long-term purpose.

Download Full-text

Review of Basalt Fiber-Reinforced Concrete in China: Alkali Resistance of Fibers and Static Mechanical Properties of Composites

Advances in Materials Science and Engineering ◽

10.1155/2018/9198656 ◽

2018 ◽

Vol 2018 ◽

pp. 1-11 ◽

Cited By ~ 3

Author(s):

Zhensheng Guo ◽

Chunfeng Wan ◽

Mengye Xu ◽

Jinxiang Chen

Keyword(s):

Three Dimensional ◽

Basalt Fiber ◽

Plain Concrete ◽

Fiber Reinforced Concrete ◽

Alkali Resistance ◽

Relative Depth ◽

Mixture Ratio ◽

Critical Content ◽

Static Mechanical ◽

Optimal Mixture Ratio

Research on three-dimensional, randomly distributed BFRC in China is analyzed and summarized in relative depth in this study. The results indicate that the effect of the fiber component and alkali corrosion temperature on the alkali resistance of BF is significant; the BF has little effect on the compressive strength of the concrete; the tensile and flexural strengths of the composites significantly increase compared with plain concrete, and the fiber content has a significant effect on the strength. In light of some problems in the current research, six possible research topics are suggested: (1) investigating the alkali resistance of the BF under dynamic temperatures, lower alkali concentrations, and longer alkali corrosion times; (2) improving the alkali resistance of the BF by increasing its hydrophobicity; (3) determining the optimal fiber distribution orientation of the BF with various characteristic parameters; (4) establishing the calculation formulas for the critical content and critical aspect ratio of various types of BF; (5) determining the optimal mixture ratio of two or more fibers in the FRC while studying the complementary mechanisms between each other; and (6) improving the dispersion of the BF and the BF/matrix interfacial properties.

Download Full-text

Properties of Microfibers of Various Compositions as a Component of Cellular Composites

Materials Science Forum ◽

10.4028/www.scientific.net/msf.1040.132 ◽

2021 ◽

Vol 1040 ◽

pp. 132-138

Author(s):

Daria Dmitrievna Netsvet ◽

Alexandr L. Popov ◽

Viktoriya Viktorovna Nelubova ◽

Svetlana V. Lasunova

Keyword(s):

Weight Loss ◽

Active Sites ◽

Glass Fibers ◽

Basalt Fiber ◽

Alkali Resistance ◽

Cement Matrix ◽

Ambient Conditions ◽

Model Medium ◽

Adsorption Sites ◽

High Durability

The paper presents studies on the properties of various types of micro-reinforcing fibers to assess their role and effectiveness in the structure formation of the cellular composite. Based on the data on the weight loss after exposure in a model medium of cement, analysis of the alkali resistance of fibers of five different types – basalt fiber, heat-treated basalt fiber, polymer fiber and glass fibers from two different manufacturers – was carried out. It is shown that the fibers have a sufficiently high durability in the medium of hardening cement, which is expressed by a relatively insignificant weight loss of the original fiber after exposure in a model medium for 28 days in ambient conditions. The weight loss for some fibers sharply increases when hardening conditions are changed to hydrothermal ones. The images of fibers exposed in a model medium of cement, obtained using scanning microscopy, were also analyzed, and the character of distribution of acidic and basic adsorption sites on the surface of fibers depending on the type was assessed. Based on the analysis of the obtained data, we can talk about a high number of active sites on the surface of basalt and glass fibers, which ensures the formation of crystalline new formations on them and makes it possible to predict their high adhesion to the cement matrix.

Download Full-text

Adsorption Performance for Reactive Blue 221 Dye of β-Chitosan/Polyamine Functionalized Graphene Oxide Hybrid Adsorbent with High Acid–Alkali Resistance Stability in Different Acid–Alkaline Environments

Nanomaterials ◽

10.3390/nano10040748 ◽

2020 ◽

Vol 10 (4) ◽

pp. 748 ◽

Cited By ~ 1

Author(s):

Chih-Wei Chiu ◽

Ming-Tsung Wu ◽

Chih-Lung Lin ◽

Jia-Wun Li ◽

Chen-Yang Huang ◽

...

Keyword(s):

Graphene Oxide ◽

High Surface ◽

Reactive Dye ◽

Alkaline Condition ◽

Alkali Resistance ◽

Functionalized Graphene ◽

Functionalized Graphene Oxide ◽

Adsorption Performance ◽

Alkaline Environments ◽

Kinetics And Isotherms

A hybrid material obtained by blending β-chitosan (CS) with triethylenetetramine-functionalized graphene oxide (TFGO) (CSGO), was used as an adsorbent for a reactive dye (C.I. Reactive Blue 221 Dye, RB221), and the adsorption and removal performances of unmodified CS and mix-modified CSGO were investigated and compared systematically at different pH values (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, and 12). The adsorption capacities of CS and CSGO were 45.5 and 56.1 mg/g, respectively, at a pH of 2 and 5.4 and 37.2 mg/g, respectively, at a pH of 12. This indicates that TFGO was successfully introduced into CSGO, enabling π–π interactions and electrostatic attraction with the dye molecules. Additionally, benzene ring-shaped GO exhibited a high surface chemical stability, which was conducive to maintaining the stability of the acid and alkali resistance of the CSGO adsorbent. The RB221 adsorption performance of CS and CSGO at acidic condition (pH 3) and alkaline condition (pH 12) and different temperatures was investigated by calculating the adsorption kinetics and isotherms of adsorbents. Overall, the adsorption efficiency of CSGO was superior to that of CS; thus, CSGO is promising for the treatment of dye effluents in a wide pH range.

Download Full-text