scholarly journals Mechanical Performance of Fiber Reinforced Cement Composites Including Fully-Recycled Plastic Fibers

Fibers ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 16
Author(s):  
Cesare Signorini ◽  
Valentina Volpini
Keyword(s):  
Environmental Sustainability ◽  
Large Scale ◽  
Mechanical Response ◽  
Mechanical Performance ◽  
Construction Materials ◽  
Cement Composites ◽  
Fiber Reinforced ◽  
Structural Applications ◽  
Reinforced Cement ◽  
Recycled Fibers

The use of virgin and recycled plastic macro fibers as reinforcing elements in construction materials has recently gained increasing attention from researchers. Specifically, recycled fibers have become more attractive owing to their large-scale availability, negligible cost, and low environmental footprint. In this work, we investigate the benefits related to the use of fully-recycled synthetic fibers as dispersed reinforcement in Fiber Reinforced Cement Composites (FRCCs). In light of the reference performance of FRCCs including virgin polypropylene (PP) fibers only, the mechanical response of composites reinforced with polyolefin filaments treated with a sol-gel silica coating and polyethylene terephthalate (PET)/polyethylene (PE) cylindrical draw-wire fibers is here assessed through three-point bending tests. Remarkably, recycled polyolefins lead to a notable enhancement in terms of peak strength and post-crack energy dissipation capability. This improvement is ascribed to both the flattened shape of fibers and the surface coating, which turns out to be very effective at strengthening the fiber-to-matrix bond. On the other hand, PET/PE fibrous reinforcement generally leads to a lower toughness, if compared to the virgin fibers. However, no reduction in terms of peak stress is evidenced. Balancing the significance of mechanical performance and environmental sustainability in the framework of a circular economy approach, both fully-recycled fibers at hand can be regarded as promising candidates for innovative structural applications.

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.

scholarly journals An Application Review of Fiber-Reinforced Geopolymer Composite

Fibers ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 23
Author(s):  
Sneha Samal ◽  
Ignazio Blanco
Keyword(s):  
Impact Strength ◽  
Energy Absorption ◽  
Elevated Temperatures ◽  
Mechanical Response ◽  
Mechanical Performance ◽  
Fiber Reinforced ◽  
Damage Area ◽  
Structural Applications ◽  
Extra Step ◽  
Geopolymer Composites

Fiber-reinforced geopolymer composites (FRGCs) were considered in terms of application in various areas, and a review is presented in this article. FRGCs are emerging as environmentally friendly materials, replacing cement in the construction industry. An alternative inorganic binder such as a geopolymer matrix promotes environmental awareness on releasing less CO2. The inorganic matrix geopolymer is considered a greener cement for FRGCs. Various types of fiber reinforcements and their role toward the improvement of tensile, flexural, impact strength, fracture toughness, and energy absorption in overall mechanical performance in FRGCs were discussed. FRGCs and their properties in mechanical response, with correlation toward microstructure evolution at room and elevated temperatures, were also discussed. Simultaneously, the durability and impact strength of FRGCs and damage area as a function of the energy absorption were presented with 3D reconstruction images. Moreover, 3D images will cover the internal volume of the FRGCs with internal porosity and fiber orientation. Hybrid fiber reinforcement adds an extra step for the application of geopolymer composites for structural applications.

scholarly journals Effect of plasma surface modification on pullout characteristics of carbon fiber-reinforced cement composites

Carbon Trends ◽  
2021 ◽  
Vol 3 ◽  
pp. 100030
Author(s):  
Jin Hee Kim ◽  
Jong Hun Han ◽  
Seungki Hong ◽  
Doo-Won Kim ◽  
Sang Hee Park ◽  
...  
Keyword(s):  
Surface Modification ◽  
Carbon Fiber ◽  
Cement Composites ◽  
Fiber Reinforced ◽  
Plasma Surface Modification ◽  
Plasma Surface ◽  
Reinforced Cement ◽  
Carbon Fiber Reinforced

scholarly journals Numerical Simulation of the Mechanical Behavior of Fiber-Reinforced Cement Composites Subjected Dynamic Loading

2021 ◽  
Vol 11 (3) ◽  
pp. 1112
Author(s):  
Nikita Belyakov ◽  
Olga Smirnova ◽  
Aleksandr Alekseev ◽  
Hongbo Tan
Keyword(s):  
Numerical Simulation ◽  
Reinforced Concrete ◽  
Dynamic Loading ◽  
Fiber Reinforced Concrete ◽  
Cement Composites ◽  
Fiber Reinforced ◽  
Lab Experiments ◽  
Reinforced Cement ◽  
Underground Workings ◽  
Concrete Damaged Plasticity

The problem of damage accumulation in fiber-reinforced concrete to structures supporting underground workings and tunnel linings against dynamic loading is insufficiently studied. The mechanical properties were determined and the mechanism of destruction of fiber-reinforced concrete with different reinforcement parameters is described. The parameters of the Concrete Damaged Plasticity model for fiber-reinforced concrete at different reinforcement properties are based on the results of lab experiments. Numerical simulation of the composite concrete was performed in the Simulia Abaqus software package (Dassault Systemes, Vélizy-Villacoublay, France). Modeling of tunnel lining based on fiber-reinforced concrete was performed under seismic loading.

Properties of ceramic fiber reinforced cement composites

2005 ◽  
Vol 35 (2) ◽  
pp. 296-300 ◽  
Author(s):  
Yiping Ma ◽  
Beirong Zhu ◽  
Muhua Tan
Keyword(s):  
Ceramic Fiber ◽  
Cement Composites ◽  
Fiber Reinforced ◽  
Reinforced Cement

scholarly journals State-of-the-Art Review on Experimental Investigations of Textile-Reinforced Concrete Exposed to High Temperatures

2021 ◽  
Vol 5 (11) ◽  
pp. 290
Author(s):  
Panagiotis Kapsalis ◽  
Tine Tysmans ◽  
Danny Van Hemelrijck ◽  
Thanasis Triantafillou
Keyword(s):  
Reinforced Concrete ◽  
High Temperatures ◽  
Mechanical Response ◽  
Mechanical Performance ◽  
State Of The Art ◽  
Experimental Investigations ◽  
Textile Reinforced Concrete ◽  
Structural Applications ◽  
Promising Solution ◽  
Good Heat Resistance

Textile-reinforced concrete (TRC) is a promising composite material with enormous potential in structural applications because it offers the possibility to construct slender, lightweight, and robust elements. However, despite the good heat resistance of the inorganic matrices and the well-established knowledge on the high-temperature performance of the commonly used fibrous reinforcements, their application in TRC elements with very small thicknesses makes their effectiveness against thermal loads questionable. This paper presents a state-of-the-art review on the thermomechanical behavior of TRC, focusing on its mechanical performance both during and after exposure to high temperatures. The available knowledge from experimental investigations where TRC has been tested in thermomechanical conditions as a standalone material is compiled, and the results are compared. This comparative study identifies the key parameters that determine the mechanical response of TRC to increased temperatures, being the surface treatment of the textiles and the combination of thermal and mechanical loads. It is concluded that the uncoated carbon fibers are the most promising solution for a fire-safe TRC application. However, the knowledge gaps are still large, mainly due to the inconsistency of the testing methods and the stochastic behavior of phenomena related to heat treatment (such as spalling).

scholarly journals Mortars with CDW Recycled Aggregates Submitted to High Levels of CO2

2021 ◽  
Vol 6 (11) ◽  
pp. 159
Author(s):  
Ricardo Infante Gomes ◽  
David Bastos ◽  
Catarina Brazão Farinha ◽  
Cinthia Maia Pederneiras ◽  
Rosário Veiga ◽  
...  
Keyword(s):  
Large Scale ◽  
Mechanical Performance ◽  
Construction Materials ◽  
Environmental Benefits ◽  
Recycled Aggregates ◽  
Construction And Demolition Wastes ◽  
Short Period ◽  
Natural Aggregates ◽  
Cement Factories ◽  
Made In

Construction and demolition wastes (CDW) are generated at a large scale and have a diversified potential in the construction sector. The replacement of natural aggregates (NA) with CDW recycled aggregates (RA) in construction materials, such as mortars, has several environmental benefits, such as the reduction in the natural resources used in these products and simultaneous prevention of waste landfill. Complementarily, CDW have the potential to capture CO2 since some of their components may carbonate, which also contributes to a decrease in global warming potential. The main objective of this research is to evaluate the influence of the exposure of CDW RA to CO2 produced in cement factories and its effect on mortars. Several mortars were developed with a volumetric ratio of 1:4 (cement: aggregate), with NA (reference mortar), CDW RA and CDW RA exposed to high levels of CO2 (CRA). The two types of waste aggregate were incorporated, replacing NA at 50% and 100% (in volume). The mortars with NA and non-carbonated RA and CRA from CDW were analysed, accounting for their performance in the fresh and hardened states in terms of workability, mechanical behaviour and water absorption by capillarity. It was concluded that mortars with CDW (both CRA and non-carbonated RA) generally present a good performance for non-structural purposes, although they suffer a moderate decrease in mechanical performance when NA is replaced with RA. Additionally, small improvements were found in the performance of the aggregates and mortars with CRA subjected to a CO2 curing for a short period (5 h), while a long carbonation period (5 d) led to a decrease in performance, contrary to the results obtained in the literature that indicate a significant increase in such characteristics. This difference could be because the literature focused on made-in-laboratory CDW aggregates, while, in this research, the wastes came from real demolition activities, and were thus older and more heterogeneous.

Micro-fiber reinforced cement composites. II. Flexural response and fracture studies

1995 ◽  
Vol 22 (4) ◽  
pp. 668-682
Author(s):  
N. Banthia ◽  
J. Sheng
Keyword(s):  
Crack Opening ◽  
Fiber Reinforcement ◽  
High Volume ◽  
Flexural Behavior ◽  
Cement Composites ◽  
Fiber Reinforced ◽  
Host Matrix ◽  
Flexural Response ◽  
Reinforced Cement ◽  
Resistance Curves

In Part I of this paper, stress–strain curves for micro-fiber reinforced cement-based composites containing high volume fractions of carbon, steel, and polypropylene fibers were obtained. Considerable strengthening, toughening, and stiffening of the host matrix due to micro-fiber reinforcement under both static and impact conditions were reported. In this paper, composites are characterized under an applied flexural load. Both notched and unnotched specimens were tested in four-point flexure; significant improvements in the flexural behavior due to fiber reinforcement were noted. Notched specimens were tested to study the growth of cracks in these composites and to develop a valid fracture criterion. With this objective, crack growth resistance curves and crack opening resistance curves in terms of the stress intensity factor were constructed. The paper recognizes the potential of these composites in various applications and stresses the need for further research. Key words: Portland cement-based materials, fiber reinforcement, fracture toughness, R-curves.

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