Effect of Recycled Fine Aggregates and Fly Ash on the Mechanical Properties of PVA Fiber-Reinforced Cement Composites

2017 ◽  
Vol 29 (2) ◽  
pp. 149-157
Author(s):  
Yi-Hyun Nam ◽  
Wan-Shin Park ◽  
Young-Il Jang ◽  
Hyun-Do Yun ◽  
Sun-Woo Kim
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Cement Composites ◽  
Fiber Reinforced ◽  
Fine Aggregates ◽  
Reinforced Cement ◽  
Pva Fiber

Thermal Properties of PVA-Fiber Reinforced Cement Composites at High Temperatures

2013 ◽  
Vol 377 ◽  
pp. 45-49 ◽  
Author(s):  
Eva Vejmelková ◽  
Robert Černý
Keyword(s):  
High Temperature ◽  
Cement Composites ◽  
Transient Method ◽  
Fiber Reinforced ◽  
Sample Heating ◽  
Vacuum Saturation ◽  
Reinforced Cement ◽  
Saturation Method ◽  
Temperature Exposure ◽  
Pva Fiber

Properties of polyvinyl alcohol-fiber reinforced cement composites are investigated as functions of temperature up to 1000 °C. Basic physical properties are measured using the water vacuum saturation method. High-temperature thermal diffusivity is determined by a transient method based on the analysis of temperature field at one-sided sample heating. High-temperature specific heat capacity is obtained using a non-adiabatic method. Experimental results show that the studied material exhibits a satisfactory resistance to high-temperature exposure and has a potential for using in high-temperature applications in building industry.

EFFECT OF RECYCLED MATERIALS ON THE TENSILE BEHAVIOR OF STEEL FIBER-REINFORCED CEMENT COMPOSITE

2017 ◽  
Vol 4 (1) ◽  
Author(s):  
Sun-Woo Kim ◽  
Wan-Shin Park ◽  
Young-Il Jang ◽  
Yi-Hyun Nam ◽  
Sun-Woong Kim ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Fly Ash ◽  
Steel Fiber ◽  
Cement Composite ◽  
Fine Aggregate ◽  
Cement Composites ◽  
Fiber Reinforced ◽  
Direct Tension ◽  
Recycled Materials ◽  
Reinforced Cement

Conventional cement composite is generally produced with ordinary Portland cement (OPC) as a binder. However, during manufacturing the cement composite, large amount of carbon dioxide (CO2) are emitted. Therefore, fly ash is proposed to be replaced to OPC in order to reduce CO2 emission of cement composites. For reinforcing fibers, micro steel fibers were used. For investigating mechanical properties of steel fiber-reinforced cement composites (SFRCCs), direct tension tests were conducted. The test results showed that fly ash improves tensile strength and ductility of SFRCCs. However, tensile strength of the SFRCC decreased as replacement ratio of recycled fine aggregate increased. The use of recycled materials in FRCC helps to save natural resources and promote sustainability in civil engineering materials.

Hydric and mechanical properties of carbon fiber reinforced cement composites subjected to thermal load

2004 ◽  
Vol 18 (8) ◽  
pp. 567-578 ◽  
Author(s):  
Jaroslava Drchalová ◽  
Eva Mňahončáková ◽  
Roman Vejmelka ◽  
Jiřı́ Kolı́sko ◽  
Patrik Bayer ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Fiber ◽  
Thermal Load ◽  
Cement Composites ◽  
Fiber Reinforced ◽  
Reinforced Cement ◽  
Carbon Fiber Reinforced

Microstructure and Mechanical Performance of Fiber-Reinforced Cement Composites Made with Nucleating-Agent Activated Coal-Fired Power Plant Bottom Ash

2020 ◽  
Vol 302 ◽  
pp. 85-92 ◽  
Author(s):  
Passakorn Sonprasarn ◽  
Parinya Chakartnarodom ◽  
Nuntaporn Kongkajun ◽  
Wichit Prakaypan
Keyword(s):  
Mechanical Properties ◽  
Power Plant ◽  
Bottom Ash ◽  
Cellulose Fiber ◽  
Nucleating Agent ◽  
Modulus Of Rupture ◽  
Cement Composites ◽  
Fiber Reinforced ◽  
Activated Coal ◽  
Reinforced Cement

The purpose of this work was to study the microstructure and the mechanical properties of the fiber-reinforced cement composites that used the nucleating-agent activated coal-fired power plant bottom ash as a raw material in the mixture for producing the composites. The raw materials for producing the fiber reinforced cement composites were the ordinary Portland cement (OPC), natural gypsum, cellulose fiber, and bottom ash. The bottom ash was chemically treated by the nucleating agent, a chemical that was prepared by the precipitation process from the aqueous solutions of sodium silicate (Na2SiO3) and calcium nitrate (Ca (NO3)2). To prepare the samples, the mixture consisting of 34.75 wt% OPC, 34.75 wt% bottom ash, 25 wt% natural gypsum, and 5.5 wt% cellulose fiber was mixed with the nucleating agent at the amount of 0 to 4.5 % of OPC weight in the mixture, and water to form the slurry. Then, the samples were produced by filter pressing process and cured in the autoclave for 16 hrs at 180 °C, and 10 bars. The mechanical properties of the samples including modulus of rupture (MOR), modulus of elasticity (MOE), and toughness were characterized by the universal testing machine (UTM). The microstructures of the samples were observed by scanning electron microscope (SEM). The results showed that the utilization of nucleating agent affect the microstructure of the sample leading to the improvement in the mechanical properties of samples.

scholarly journals Effect of Expansive Admixtures on the Shrinkage and Mechanical Properties of High-Performance Fiber-Reinforced Cement Composites

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Won-Chang Choi ◽  
Hyun-Do Yun
Keyword(s):  
Mechanical Properties ◽  
High Performance ◽  
Shrinkage Strain ◽  
Cement Composites ◽  
Fiber Reinforced ◽  
Calcium Sulfoaluminate ◽  
High Performance Fiber ◽  
Reinforced Cement ◽  
Shrinkage Compensation ◽  
Direct Tensile

High-performance fiber-reinforced cement composites (HPFRCCs) are characterized by strain-hardening and multiple cracking during the inelastic deformation process, but they also develop high shrinkage strain. This study investigates the effects of replacing Portland cement with calcium sulfoaluminate-based expansive admixtures (CSA EXAs) to compensate for the shrinkage and associated mechanical behavior of HPFRCCs. Two types of CSA EXA (CSA-K and CSA-J), each with a different chemical composition, are used in this study. Various replacement ratios (0%, 8%, 10%, 12%, and 14% by weight of cement) of CSA EXA are considered for the design of HPFRCC mixtures reinforced with 1.5% polyethylene (PE) fibers by volume. Mechanical properties, such as shrinkage compensation, compressive strength, flexural strength, and direct tensile strength, of the HPFRCC mixtures are examined. Also, crack width and development are investigated to determine the effects of the EXAs on the performance of the HPFRCC mixtures, and a performance index is used to quantify the performance of mixture. The results indicate that replacements of 10% CSA-K (Type 1) and 8% CSA-J (Type 2) considerably enhance the mechanical properties and reduce shrinkage of HPFRCCs.

scholarly journals Fiber-Reinforced Cement Composites: Mechanical Properties and Structural Implications 2019

2019 ◽  
Vol 2019 ◽  
pp. 1-2 ◽  
Author(s):  
Doo-Yeol Yoo ◽  
Nemkumar Banthia ◽  
Kazunori Fujikake ◽  
Young Hoon Kim ◽  
Rishi Gupta
Keyword(s):  
Mechanical Properties ◽  
Cement Composites ◽  
Fiber Reinforced ◽  
Reinforced Cement
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