scholarly journals Impact of metakaolin on mechanical performance of flax textile-reinforced cement-based composites

2021 ◽  
pp. 104367
Author(s):  
Filip Majstorović ◽  
Vaclav Sebera ◽  
Maruša Mrak ◽  
Sabina Dolenec ◽  
Marco Wolf ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
Reinforced Cement

Review of Mechanical Properties and Durability of PVA Fiber Reinforced Cement Based Composite Materials

2013 ◽  
Vol 804 ◽  
pp. 8-11 ◽  
Author(s):  
Xiao Bing Dai ◽  
Peng Zhang ◽  
Ji Xiang Gao
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
High Performance ◽  
Mechanical Performance ◽  
Construction Materials ◽  
Fiber Reinforced ◽  
Practical Engineering ◽  
Reinforced Cement ◽  
Pva Fiber ◽  
Structure Engineering

As a kind of high performance cement based construction materials, because of good mechanical performance and durability, PVA fiber reinforced cement based materials have been paid more and more attention in the field of civil structure engineering. To grasp the characteristics of PVA fiber reinforced cement based composite materials and promote a better application of PVA fiber reinforced cement based composite in practical engineering, a series of research works on the mechanical properties and durability of PVA fiber reinforced cement based composite were introduced systematically.

Hybrid Fibre-Reinforced Cement Composite

2012 ◽  
Vol 730-732 ◽  
pp. 343-348
Author(s):  
Elisabete R. Silva ◽  
Humberto E. Ferreira ◽  
Jorge F.J. Coelho ◽  
João C. Bordado
Keyword(s):  
Mechanical Performance ◽  
Fibre Length ◽  
Cement Composite ◽  
Crack Arrest ◽  
Cement Matrix ◽  
Interfacial Zone ◽  
Hybrid Fibre ◽  
Mechanical Behaviours ◽  
Reinforced Cement ◽  
Cement Matrices

This paper reports the results of a series of experiments carried out to investigate the effectiveness of newly hybrid polyethylene/polypropylene (PP/PE) fibres inclusion in the mechanical performance of cement matrices, with regard to fibres properties and content. The results indicate that, compared with plain cement matrix, the PP/PE fibre-reinforced cement matrices (FRC) revealed improvements on their mechanical performance. Increases of 37 ± 1% on compressive (40.2 MPa) and flexural strengths (8.1 MPa) were obtained for 24 mm fibre length composites containing a rather low fibre’s content (1 wt.%). These mechanical improvements were achieved after optimisation of the mortar workability by the addition of a superplasticizer. FRC mechanical behaviours also evidenced that despite the compressive strengths increasing with fibre length, a flexural strength effect is only noticeable for a 24 mm length fibre-reinforced composite and for fibres volume higher than 2.9 %. Morphological observations showed a strong interaction between fibres and cement matrix, evidenced a crack arrest role (bridge effect) on fibre/cement interfacial zone and revealed a typical multiple fracture cracking mechanism.

Nanomechanical Performance of Interfacial Transition Zone in Fiber Reinforced Cement Matrix

2018 ◽  
Vol 760 ◽  
pp. 251-256 ◽  
Author(s):  
Vojtěch Zacharda ◽  
Petr Štemberk ◽  
Jiří Němeček
Keyword(s):  
Elastic Modulus ◽  
Transition Zone ◽  
Cement Paste ◽  
Steel Fiber ◽  
Mechanical Performance ◽  
Creep Compliance ◽  
Interfacial Transition Zone ◽  
Cement Matrix ◽  
Average Value ◽  
Reinforced Cement

This paper shows a micromechanical study of interfacial transition zone (ITZ) around steel fiber in cement paste. It investigates microstructure and mechanical performance of the ITZ by a combination of nanoindentation and scanning electron microscopy (SEM). The investigated specimens were made from cement CEM I 42.5R paste with dispersed reinforcement in the form of steel fiber TriTreg 50 mm. The SEM demonstrated larger porosity and smaller portion of clinkers in the ITZ. Nanoindentation delivered values of elastic modulus, hardness and creep parameters around the fiber. An average value of elastic modulus in ITZ was at the level of 67% in comparison with cement bulk and the width of ITZ was about 40 µm. The value of hardness was found to be 60% of the average hardness of the bulk cement paste. The measured load-displacement curves were used for calculation of creep indentation parameter (CIT) and the creep compliance function. An average value of the creep compliance in the ITZ was found to be two times higher than in the cement bulk.

scholarly journals Performance Prediction and Mix Ratio Optimization for Multielement Green High-Performance Fiber-Reinforced Cement Matrix Composite

2021 ◽  
Vol 45 (1) ◽  
pp. 59-67
Author(s):  
Zimao Peng
Keyword(s):  
Matrix Composite ◽  
High Performance ◽  
Mechanical Performance ◽  
Superior Performance ◽  
Synthetic Fiber ◽  
Cement Matrix ◽  
Fiber Reinforced ◽  
Optimal Mix ◽  
High Performance Fiber ◽  
Reinforced Cement

Green high-performance fiber-reinforced cement (GHPFRC) matrix composite is prepared by mixing matrix composites like slurry, mortar, or concrete with reinforcing materials like metal or inorganic nonmetal fiber, synthetic fiber, or natural organic fiber by a certain method. This composite is more energy-efficient, ductile, low-carbon, economic, and environmentally friendly than ordinary concrete. However, the performance of GHPFRC matrix composite has not been fully studied. The existing research only deals with the seismic performance and fire resistance of the material, failing to systematically discuss the optimal mix ratio. To solve the problem, this paper presents an optimization strategy for multielement GHPFRC matrix composite, and carries out multiple tests on its basic mechanical performance, toughness, impact resistance, shrinkage cracking, dry shrinkage performance, and durability. The test data on various indices verify the superior performance of the prepared multielement GHPFRC matrix composite. Further, the optimal mix ratio of the material was determined as: 60% cement, 30% fly ash, and 10% silica ash, with the water-cement ratio of 0.4, water reducer dosage of 1.5%, and quartz sand dosage of 500g.

Tensile Response and Fracture Process of High-Performance Hybrid Fiber-Reinforced Cement Composites

2006 ◽  
Vol 324-325 ◽  
pp. 715-718 ◽  
Author(s):  
Hyun Do Yun ◽  
Sun Woo Kim ◽  
Esther Cheon
Keyword(s):  
Elastic Modulus ◽  
High Performance ◽  
Fracture Process ◽  
Mechanical Performance ◽  
Multiple Cracks ◽  
Cement Composites ◽  
Hybrid Fiber ◽  
Cracking Behavior ◽  
Reinforced Cement ◽  
Steel Cord

Five twisted steel fibers (steel cord, SC) are used to improve the post-cracking behavior of cement composites. In addition to these steel cord macrofibers, microfibers are used to enhance the pre- and post-cracking strength and behavior. The three specific hybrid fiber blends pursued in this investigation are SC and polyethylene (PE), SC and polypropylene (PP) as well as SC and polyvinyl alcohol (PVA) fibers. The research results show that SC macrofibers with high ultimate strain, strength and bond stress can bridge the macrocracks in the matrix. Therefore, cement-based composites reinforced with SC fibers exhibit a pseudo-strain hardening in tension as a result of the formation of multiple cracks. The microfibers improved pre-peak mechanical performance, strength, and fracture process by delaying the formation of a macrocrack. The tensile strength, energy consumption capacity and ductility of SC macrofibers and high elastic modulus microfiber PE reinforced cement-based composites are tremendously improved compared to SC macrofibers with lower elastic modulus microfibers PVA and PP.

Experimental Study on Mechanics Performance of Polyvinyl Alcohol Fiber Reinforced Cement-Based Composites

2014 ◽  
Vol 584-586 ◽  
pp. 1477-1481 ◽  
Author(s):  
Zhong Yang ◽  
De Bao Jiang ◽  
Xiao Jing Gu
Keyword(s):  
Mechanical Properties ◽  
Experimental Study ◽  
Polyvinyl Alcohol ◽  
Mechanical Performance ◽  
Fiber Reinforced ◽  
Failure Patterns ◽  
Polyvinyl Alcohol Fiber ◽  
Mechanics Performance ◽  
Reinforced Cement ◽  
Strain Relationship

Polyvinyl alcohol fiber reinforced cement-based composites are a new kind of material based on micro mechanics design. It is produced by adding polyvinyl alcohol fiber in the cement-based composites. In efforts to study the mechanical properties of polyvinyl alcohol fiber reinforced cement-based composites, some specimens were tested to examine performances. According to experimental investigation on mechanical properties, the stress-strain relationship curves and failure patterns are obtained. The test indicates that polyvinyl alcohol fiber reinforced cement-based composites have better toughness and fracture energy, and it has superior physical mechanical performance.

Sign in / Sign up

Export Citation Format

Share Document