Engineering Fiber

S.F. Build-fiber is now widely used in concrete/cement mortar/cementitious plastering material in the world. It can remarkably modify its splitting resistance, barrier property, shockproof property and resistance to impact, and takes effect in reinforcing, firm and durability. It is a kind of high tech. and new type building material that it can take very important effect in building engineering.

As far back as 1970s, some developed countries, such as the USA, UK, Canada, came to research the synthetic fiber for building, latter achieved commercialized production. With widely blending fiber into concrete/cement mortar for several ten years, the all test reports show that the engineering qualities are improved in diversified building. First, the splitting resistance was improved and the crazing index was greatly reduced; the second, barrier property was improved, primarily control the water permeability; the third, the resistance to impact was increased by 3-4 times, the fastness of concrete was greatly improved; the fourth, the toughness was obviously improved and the bending strength was greatly improved.

In the 1990s, Durafiber (US) came into our country and applied in key building engineering. Now, the fiber has been well received by the building industry of our country. But it is impossible to use it on a large scale because of its high price.

For realizing the new type building fiber made in our country, reducing greatly engineering costs and meeting the development demands in our building field, our company had developed S.F. Buildfiber successfully in 2002, and it has formed the capability of producing 5000T this kind of fiber a year. The products is made of PP/PE/PET and spun in particular process. After its surface coated with activation, it possesses the merits as follows: good acid and alkali resistance and resistance to ageing, high elastic modular, excellent dispersion quality, low density, and so on. The product does not join together, distributes evenly in concrete and has good affinity for cement and preserve moisture. Alll of the targets of the fiber reach the standard of the same kind product made in foreign countries.

The main techn. targets and performance

Tech. indexes Tensile strength (Mpa) Modulus (Mpa) Specific gravity Acid-alkali resistance Security Acti- vation content (%) Fiber brand S.F. fiber I >280 >3800 0.91 Ultra-high Nonpoisonous <0.5 S.F. fiber II >320 >6000 1.04 Ultra-high Nonpoisonous <0.5 Known fiber in foreign country >276 >3793 0.91 Ultra-high Nonpoisonous <0.4 The specifications of S.F. build fiber 19mm, 10mm, 6mm, 3mm

Tech. indexes	Melting point (ºC)	Burning point (ºC)	Electric and thermal conductivity	Cross-section	Ageing resistance
Fiber brand
S.F. fiber I	165	>583	Ultra-low	Profiled	Super
S.F.fiber II	Sheath 165, Core 260	>583	Ultra-low	Concentric-composite	Super
Known fiber in foreign country	160	580	Ultra-low	Circular
The specifications of S.F. build fiber	19mm, 10mm, 6mm, 3mm

The test of acid-alkaili resistance is according to the relate standards of glass fiber
1.The strength of S.F. fiber is hardly lost after soaking in sodium hydroxide (5%, 23ºC) for 28 days;
2.The strength of S.F. fiber is hardly lost after soaking in sodium hydroxide (5%, 80ºC) for 6h.


The applied field of S.F. fiber
* The concrete road, airfield running road and parking apron
* Irrigation works, waterproof works underground and sewage farm
* The highway, tunnel of railway, underground engineering
* Bridge works, crossroads, the pavement of trestle and guardrail
* The houses, the concrete of toilet and cement mortar for stuccoing
* The cement mortar/cementitious plastering material for decorating and cement mortar for keeping warm

The proportion of using S.F. fiber

Application projects The specification of fiber The weight of fiber per stere Concrete, highway, bridge,underground engineering, irrigation works 19mm 0.8-0.9 kg The concrete of houses 19mm 0.9-1 kg The cement mortar for stuccoing 9mm 1.2-1.3 kg The cementitious plastering material and cement mortar for keeping warm 3mm, 6mm Blending into 2.5-5‰ according to the total weight

The merits of using S.F. fiber
* Blended into cement mortar, will greatly improve the splitting resistance and the cracking index will be reduced more than 1.5-2 times
* Blended into concrete, will obviously improve the barrier property and water permeability will be reduced more than 1.5-2 times
* Blended int