Polypropylene Fiber & PVA Fiber

Polypropylene Fiber
PVA Fiber
Fiber to replace of steel fiber
in concrete application

 Polypropylene Fiber for Cement-based Concrete

 

Polypropylene Fiber effectively control the microcracks resulting from ductile shrink of concrete,dry shrink and variations of temperature, prevent and constrain the from and development of cracks. As a new kind of reinforcement fibers for concrete,

the polypropylene fibers have becoming a focus on research and application  of  fibrous  concrete  science  after  glass  fiber  and  steel  fibers

 

Characteristics of  Polypropylene Fiber

 

Density g/cm3 : 0.91

Length(mm) : 12,15,17,19

Acid and Alkali resistance : strong

Tensile Strength (mps) : 400 min.

Melting Point (Deg.C) : 160--175

 

  

Function of Polypropylene Fiber Reinforced Concrete
  

Polypropylene Fibers have obvious advantages of its single fiber slim in length,large in amount after fully spread out in concrete,comparing with steel fibers,and they are characterized by their resistance to moisture and chemicals,and low in elastic modulus so made improvements in concrete performance in the following aspects:
Constrain cracks resulted in ductile shrink
Improve permeability
Improve abrasion resistance
Improve tensile strengthcapability of impact and fatigue 
Prevent and stave off  main structural bars from erosion
Replace other forms in controlling nonstructural cracks

  

  

Applications of Polypropylene Fibers

Concrete pavementsbridge decksAirport runways and Manufacturing

facilities
Tunnelwalls and top deck of mining tunnel
Riverway dam  reservoir
Military infrastructures pier dock
Highway barrier walls Concrete edging 

 

 PVA Fiber

 

PVA Fiber is mainly used in sheet and section material,
and could prevent the microcrack caused by the plastic shrinkage of the concrete.
This environmental product gradually takes place of the asbestos and becomes a new kind of material.

 

Specification
 

Material Form : polyvinyl alcohol 
The Type of the Fiber: bunchy monofilament
Color light yellow 
Denier(dtex) 2.0±0.5
Length(mm) 6±1 
Elongation at Break % 6-11
Tensile Strength (cn/dtex) 9 min 
Modulus of elasticity (cn/dtex) 290 min

 

Note: The range of length 3-50mm, and according to the your demand

Performance

1.High strength and low elongation at break: excellent physical performance
2.Acid & Alkali Resistance: Under the long-time acid and alkali enviroment, the strength damage is low.
3.Corrosion resistance: Buried in the soil long time, no mold, no rot, no eaten by insect.
4.Dispersiviity: The fibers do not conglutinate, good dispersivity in water, excellent compatibility with cement.

Function

1. Crack resistance and infiltration resistance: Fibers disperse in the cement (mortar) in disorder,
could prevent happen, development of the crack.,improve waterproof and infiltration resistance ability.

Contract experiment of concrete reinforcement（PVA-Fiber VS PA-Fiber）

Fiber Type Fiber Quantity (g/m3) Crack Decline Percent
PA-Fiber 900                    43
PVA-Fiber 900                    86

2.Impact resistance and quake resistance: Absorb the impact energy effectively, improve the quake resistance ability

Contract experiment of cement board reinforcement (PVA Fiber VS Asbestos)

Type	Fiber Performance	Cement Board Performance	Cement Board Formula
	Denier(d) Strength(kg/cm2) Elongation(%)  Young Modulus(kg/cm2)	Bending strength(kg/cm2)  Toughness(area ratio) Impact Strength (kg/cm2)  Crack(day)
PVA-Fiber	1.4   15.2  6.0  3685 2.4  14.4  6.8  3127	378 42 4.9 >30 356 38 4.3 >30	Fiber: Cement: Silica sand 0.003: 1: 2
Asbestos		240  1  2.3  1	Asbestos(wet):Slurry: Cement 15: 3:  82

3. Improve frozen resistance and fatigue resistance ability

4. Improve toughness: Improve brittleness of the concrete, Increase impact resistance and bend resistance ability

Application

1.Take place of asbestos and manufacture the asbestos cement products.
2.Make the light wallboard,insulation board and other building material.
3.Make the component of the concrete,tubing and board.
4.Large acreage concrete pouring, such as quay.
5.The roof,basement of the industrial and residential building.
6.The sprayed concrete, such as tunnel,mine,culvert and side slope.

Use method

1.Keep concrete the same mixing proportion, according to the designing adding quantity and the concrete volume for every mixing, weigh the fibers
2.Prepare the aggregate well, add the fibers in, then add both aggregate and fibers in the mixing machine, add water and mix.
3.After finish the mixing, fetch some as the sample, if the fibers have dispersed to monofilament, the concrete could be use for your project; if there are still bunch fibers, prolong the mixing time another 30-60 seconds.
4.The installation and protection of fiber concrete is same with common concrete
5.Adding quantity: Generally speaking, for mortar, wave tile and fiber reinforcement cement flat board, the range is 0.6-1kg/m3, common use is 0.6 kg/m3.; for concrete, the range is 0.6-1.9 kg/m3., common is 0.9 kg/m3.

 

We also supply a fiber to replace of steel fiber

It can take place of steel fiber for the cement concrete,
to improve the capability of crisp,the low-tensile strength, the low-elongation ultimate of the concrete instead of anti-stretch,anti-bending,anti-fatigue, high-tenacity and so on,
so it got wide application in the construction, roads, bridges, hydraulic engineering and other engineering fields