Use of Natural Pyrophyllite as Cement Substitution in Ultra Performance Polypropylene Fiber Concrete

2021 ◽  
Vol 56 ◽  
pp. 123-135
Author(s):  
Sabria Malika Mansour
Keyword(s):  
Construction Industry ◽  
Polypropylene Fiber ◽  
Polypropylene Fibers ◽  
Wide Field ◽  
Industry Effect ◽  
Hardening Process ◽  
Fiber Concrete ◽  
Hardened State ◽  
Alumino Silicate ◽  
Mechanical Performances

The present work investigates the use of an alumino-silicate material, the pyrophyllite as cement substitution, synthetic polypropylene fibers and binder to create an unusual ultra-performance fiber concrete; new composite, which offers a wide field of possible use in construction industry. Effect of pyrophyllite on the physical-mechanical properties is analyzed. One reference fiber concrete without pyrophyllite and three fiber concretes containing 10%, 20%, 30% of pyrophyllite were elaborated. Results show that the pyrophyllite affects the characteristics of the concrete. Indeed, in the hardened state, the density of fiber concrete decreased with pyrophyllite rate increasing. Moreover, the use of pyrophyllite slows down the hardening process of concrete, consequently producing at early ages, compressive, flexural and tensile strengths and elastic modulus of concretes approaching without exceeding those of the reference fiber concrete. The fiber concretes are also considered to be of good quality. It seems that the rate of 10 % of pyrophyllite generates the best physical-mechanical performances that approach those of the reference fiber concrete. The use of pyrophyllite as a cement substitution is beneficial since it can help to decrease the production of cement; the amount of CO2 released and protects the environment.

Research on the Durability of Polypropylene Fiber Concrete

2011 ◽  
Vol 261-263 ◽  
pp. 93-97
Author(s):  
Chen Fei Wang ◽  
Di Tao Niu
Keyword(s):  
Flexural Strength ◽  
Penetration Depth ◽  
Polypropylene Fiber ◽  
Frost Damage ◽  
Chloride Penetration ◽  
Polypropylene Fibers ◽  
Fiber Concrete ◽  
Freezing Cycle ◽  
Scaling Resistance

In order to study the durability of Polypropylene fiber concrete, indoor artificial methods were used to simulate dry-wet cycle and deicer-frost damage. The results indicated that amounts of polypropylene fibers increase the flexural strength of concrete slightly. The chloride penetration depth increased as the cycles of dry-wet was increased, adding 0.1% PPF into concrete have the prefect resistance of Cl- penetration. Under salt freezing cycle, the deicer-scaling resistance of concrete is reduced by the addition of Polypropylene fiber. The corner of concrete has the largest Cl- penetration area.

Application of Polypropylene Fiber Concrete in Underground Engineering

2010 ◽  
Vol 163-167 ◽  
pp. 1776-1779
Author(s):  
Xiao Rong Shao ◽  
Liang Feng Zhu
Keyword(s):  
Polypropylene Fiber ◽  
Concrete Structures ◽  
Polypropylene Fibers ◽  
Mass Concrete ◽  
Construction Technology ◽  
Underground Engineering ◽  
Shrinkage Cracking ◽  
Fiber Concrete ◽  
Design Requirements ◽  
Resistance Performance

Aimed to solve the problem that the mass concrete structures are apt to crack in underground engineering, this paper makes some research from the view of crack resistance performance of polypropylene fiber concretes. Since polypropylene fiber achieves waterproof through realizing of crack resistant, blending polypropylene fibers into concretes can reduce early contraction deformation of concretes, hinder emergence of plastic shrinkage cracking and improve impermeability of concretes, and its construction technology is simple. In practical application of this in anti-cracking and anti- seepage concrete structures in the International Terminal project of Hangzhou Xiaoshan International Airport, we find that mix of polypropylene fibers with concretes clearly improves anti-cracking and anti-seepage performance of concrete structures and meets design requirements of basements through measuring temperature and observing cracking condition of the mass concrete structures of basements on site. The project can provide experience for reference to similar projects.

Application of Polypropylene Fiber Concrete in Bridge Deck Pavement

2006 ◽  
Vol 302-303 ◽  
pp. 418-423 ◽  
Author(s):  
Jun Hong Shan ◽  
Ming Kai Zhou ◽  
Bei Xing Li ◽  
Ji Wei Cai ◽  
Fang Xu
Keyword(s):  
Yangtze River ◽  
Bridge Deck ◽  
Polypropylene Fiber ◽  
Maintenance Cost ◽  
Highway Bridge ◽  
Polypropylene Fibers ◽  
The Yangtze River ◽  
Road Pavement ◽  
Fiber Concrete ◽  
Bridge Deck Pavement

The Badong highway bridge over the Yangtze River is a grand bridge in Enshi, Hubei Province of China. Its deck pavement consists of C40 polypropylene fiber concrete, 100 millimeters thick. Experiments show that C40 concrete incorporating polypropylene fibers at dosage of 1.35 kg/m3 has the excellent properties against cracking, permeation, impact, wearing, etc. Thus polypropylene fiber concrete as deck pavement can extend service life of the deck and decrease the maintenance cost and traffic inconvenience for reparation. It can be widely applied in construction of deck pavement and road pavement.

Experimental Investigation on the Polypropylene Fiber Concrete Performance of Yellow River Canal Lining in the Middle Line of South-to-North Water Transfer Project

2011 ◽  
Vol 52-54 ◽  
pp. 1987-1991 ◽  
Author(s):  
Hou Guo Fang ◽  
Ping Hui Liu ◽  
Tao Zhang
Keyword(s):  
Tensile Strength ◽  
Yellow River ◽  
Polypropylene Fiber ◽  
Water Transfer ◽  
Polypropylene Fibers ◽  
Middle Line ◽  
Concrete Technology ◽  
Equipment Construction ◽  
Fiber Concrete ◽  
North Water

In order to meet the running needs of the first-stage construction in the middle line of South-to-North Water Transfer Project, the canal lining of both sides of Yellow River Tunnels Project need the use of mechanized equipment construction in order to improve the quality and efficiency of lining construction, there is a need to study the feasibility of the use of polypropylene fiber concrete instead of reinforced concrete in canal lining. This paper analyzes the effect of polypropylene fiber on concrete shrinkage and crack resistance. The results show that all three polypropylene fibers have properties of a low density and high elongation, the dispersivity test results show that dispersivity is better when stirring fiber A after a certain period of time. After the incorporation of polypropylene fibers, the concrete splitting tensile strength is significantly increased, altogether with ultimate tensile value and frost resistance. The incorporation of polypropylene fibers increases the tensile strength of concrete and improve the toughness of it. Compared with standard concrete, the early shrinkage of polypropylene fiber concrete is significantly lower, the incorporation of polypropylene fibers can take the place of steel mesh in concrete cracking, especially in the early control of concrete cracks, it can effectively prevent and suppress the cracks formation and development. This paper recommends the concrete proportioning parameters meeting the requirements of canal lining concrete technology and construction.

scholarly journals FRESH AND MECHANICAL CHARACTERISTICS OF SELF-COMPACTING POLYPROPYLENE FIBER CONCRETE INCORPORATED WITH KAOLIN

SINERGI ◽  
2020 ◽  
Vol 24 (3) ◽  
pp. 223
Author(s):  
Hakas Prayuda ◽  
Berkat Cipta Zega ◽  
Fanny Monika ◽  
Fadillawaty Saleh ◽  
Martyana Dwi Cahyati
Keyword(s):  
Tensile Strength ◽  
Compressive Strength ◽  
Flexural Strength ◽  
Concrete Beam ◽  
Polypropylene Fiber ◽  
Polypropylene Fibers ◽  
Flexural Test ◽  
Self Compacting Concrete ◽  
Additional Material ◽  
Fiber Concrete

Self Compacting Concrete (SCC) is concrete with high fluidity so that it can flow and fill the spaces in the mold without the compaction process. This study discusses the effect of the adding of kaolin and polypropylene fibers in order to increase the flowability, compressive strength, flexural strength, and tensile strength in self-compacting concrete. The additional material of kaolin was 5%, 10%, and 15% of the cement weight. The polypropylene fibers were 1%, 1.5%, and 2%. The flowability test, which was used, was Table flow, V-Funnel, and L-Box. Compressive strength testing was conducted when the concrete was 7, 14, and 28 days old. The flexural test was performed with a measurement of 150 x 150 x 600 mm as many as 18 specimens tested at the age of 28 days. The results showed that the addition of kaolin and polypropylene fibers met the flowability specifications of self-compacting concrete. The addition of polypropylene can increase the flexural strength and tensile strength of the concrete beam, but cannot increase the compressive strength of self-compacting concrete.

scholarly journals Mechanical performance comparison of glass and mono fibers added gypsum composites

2018 ◽  
Vol 4 (1) ◽  
pp. 9 ◽  
Author(s):  
Sadık Alper Yıldızel ◽  
Serdar Çarbaş
Keyword(s):  
Compressive Strength ◽  
Construction Industry ◽  
Mechanical Performance ◽  
Glass Fibers ◽  
Performance Comparison ◽  
Polypropylene Fibers ◽  
Performance Tests ◽  
Reinforced Composites ◽  
Mechanical Performances ◽  
Shrinkage Behavior

Gypsum and gypsum based composite are widely preferred in construction industry for various purposes. Mechanical performances of gypsum composite have been enhanced by researchers in order to increase its area of usage. In this research, gypsum composites containing expanded glass were reinforced by glass fibers (GF) and mono polypropylene fibers (MPF). GF and MPF were used up to 1.5 %. The flexural strength, compressive strength, and shrinkage behavior of the composites were examined within the scope of this study. 50 x 50 x 50 mm and 40 x 40 x 160 sized specimens were prepared for the mechanical performance tests. It was obtained that flexural and shrinkage behavior of the composite were enhanced with the addition of MPF compared to GF added mixes; however, compressive strength values were not as high as GF reinforced composites.

scholarly journals An Experimental Study of Shear Resistance for Multisize Polypropylene Fiber Concrete Beams

2021 ◽  
Vol 15 (1) ◽  
Author(s):  
Xin Yang ◽  
Ninghui Liang ◽  
Yang Hu ◽  
Rui Feng
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Concrete Beams ◽  
Polypropylene Fiber ◽  
Initial Crack ◽  
Reinforced Concrete Beams ◽  
Polypropylene Fibers ◽  
Computational Formula ◽  
Fiber Concrete ◽  
Material Theory

AbstractTo study the influence of polypropylene fibers with different thicknesses on concrete beams, inclined section shear tests of polypropylene fiber concrete beams were carried out. The cracking load, ultimate load, midspan deflection, reinforcement, and strain of polypropylene fiber concrete beams and conventional reinforced-concrete beams under shear were compared and analyzed. The load-bearing capacity of the rectangular beams was improved significantly by polypropylene fiber addition. Compared with conventional reinforced-concrete beams, the limit shear load of concrete beams with polypropylene fibers and multisize polypropylene concrete beams that were reinforced with three types of fibers increased by 8.67% and 17.07%, respectively. By mixing polypropylene fibers into concrete beams, the initial crack shear force of the beam was improved, the number of cracks was increased and the crack width was reduced, which can increase the beam ductility, inhibit crack formation and increase the strength. The computational formula of the shear ultimate bearing capacity of polypropylene fiber–concrete beams was revised according to composite material theory, and the calculated results were consistent with the test values.

scholarly journals Multi-Scale Study of The Small-Strain Damping Ratio of Fiber-Sand Composites

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2476
Author(s):  
Haiwen Li ◽  
Sathwik S. Kasyap ◽  
Kostas Senetakis
Keyword(s):  
Dynamic Properties ◽  
Wide Spectrum ◽  
Damping Ratio ◽  
Polypropylene Fiber ◽  
Small Strain ◽  
Treatment Method ◽  
Fiber Content ◽  
Polypropylene Fibers ◽  
Test Results ◽  
Fiber Reinforced

The use of polypropylene fibers as a geosynthetic in infrastructures is a promising ground treatment method with applications in the enhancement of the bearing capacity of foundations, slope rehabilitation, strengthening of backfills, as well as the improvement of the seismic behavior of geo-systems. Despite the large number of studies published in the literature investigating the properties of fiber-reinforced soils, less attention has been given in the evaluation of the dynamic properties of these composites, especially in examining damping characteristics and the influence of fiber inclusion and content. In the present study, the effect of polypropylene fiber inclusion on the small-strain damping ratio of sands with different gradations and various particle shapes was investigated through resonant column (macroscopic) experiments. The macroscopic test results suggested that the damping ratio of the mixtures tended to increase with increasing fiber content. Accordingly, a new expression was proposed which considers the influence of fiber content in the estimation of the small-strain damping of polypropylene fiber-sand mixtures and it can be complementary of damping modeling from small-to-medium strains based on previously developed expressions in the regime of medium strains. Additional insights were attempted to be obtained on the energy dissipation and contribution of fibers of these composite materials by performing grain-scale tests which further supported the macroscopic experimental test results. It was also attempted to interpret, based on the grain-scale tests results, the influence of fiber inclusion in a wide spectrum of properties for fiber-reinforced sands providing some general inferences on the contribution of polypropylene fibers on the constitutive behavior of granular materials.

Effects of Two Polypropylene Fibers on the Properties of High Strength Concrete

2013 ◽  
Vol 357-360 ◽  
pp. 1328-1331
Author(s):  
Bai Rui Zhou ◽  
Dong Dong Han ◽  
Jian Hua Yang ◽  
Yi Liang Peng ◽  
Guo Xin Li
Keyword(s):  
Portland Cement ◽  
Modulus Of Elasticity ◽  
High Strength Concrete ◽  
Polypropylene Fiber ◽  
High Strength ◽  
Polypropylene Fibers ◽  
Strength Concrete ◽  
Reticular Fiber ◽  
Binder Ratio ◽  
Water To Binder Ratio

Portland cement, crushed stone, sand and superplasticizer were used to obtain a high strength concrete with a low water to binder ratio. A reticular polypropylene fiber and a single polypropylene fiber were used to improve the strength of the high strength concrete, but the effects of the two fibers on the slump and strengths were quite different. The reasons of the differences were the surface area and the modulus of elasticity of the fibers. The results show the reticular fiber was better to used in high strength concretes.

Influence of the Residue of Casting by Lost Wax in the Modulus of Elasticity and Porosity of Concretes

2014 ◽  
Vol 805 ◽  
pp. 343-349
Author(s):  
Carine F. Machado ◽  
Weber G. Moravia
Keyword(s):  
Construction Industry ◽  
Modulus Of Elasticity ◽  
Chemical Characterization ◽  
Microstructural Characterization ◽  
Cement Matrix ◽  
X Ray Diffraction ◽  
X Ray ◽  
Hardened State ◽  
Material Powder

This work evaluated the influence of additions of the ceramic shell residue (CSR), from the industries of Lost Wax Casting, in the modulus of elasticity and porosity of concrete. The CSR was ground and underwent a physical, chemical, and microstructural characterization. It was also analyzed, the environmental risk of the residue. In the physical characterization of the residue were analyzed, the surface area, and particle size distribution. In chemical characterization, the material powder was subjected to testing of X-ray fluorescence (XRF). Microstructural characterization was performed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The residue was utilized like addition by substitution of cement in concrete in the percentages of 10% and 15% by weight of Portland cement. It was evaluated properties of concrete in the fresh and hardened state, such as compressive strength, modulus of elasticity, absorption of water by total immersion and by capillarity. The results showed that the residue can be used in cement matrix and improve some properties of concrete. Thus, the CSR may contribute to improved sustainability and benefit the construction industry.

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