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Fiber additive of high quality for a SMA pavement
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ASCON - CEL
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Good
Recycling
Products(GR) Certified
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1. What is a SMA Method?
It is a paving method maximized a resisting force against a plasticity transformation by minimizing a transformation effect by letting the input character of aggregate go in gear in the optimum condition, a aggregate breakaway and a crack in order to increase the fuidity and endurance of an asphalt pavement as an asphalt paving method being applied in all European countries including German and the United States(FHWA).
2. Concept of SMA
SMA mixture=aggregate+MASTIC(asphalt+sand+filler)+ASCON-CEL
(Cellulose Fiber)
Structure of SMA
Structure of SMA is a mixture which can fill between the gaps of thick aggregate as shown in a figure and this mastic works as a paste consolidating aggregate and aggregate.
3. Basic Concept of Compact Density/the SMA Mixture
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Reaction force transmission Conception of the compact density asphalt mixture
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Reaction force transmission Conception of the SMA mixture
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The transmission resistance characteristic of the mixture depends on a friction force between pebbles and viscosity of an asphalt binder rather than aggregate goes in gear.
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Unlike aggregate, adhesion force of the SMA mixture to the asphalt binder is allowed to prevent a crack and the concept shows that the all the resisting forces against a compression force and a shear force are created because aggregate goes in gear
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4. Aggregate structure character of the plain mixture and the SMA mixture
5. Advantage of the SMA mixture
1.Excellent resistance against a plasticity transformation under the conditon of an high temperature .
2.Mastic including fiber elements minimizes crack creation and a breakaway.
3.Friction resistance is excellent because a surface structure is coarse and driving is safe because water membrane is not created and the road surface is not reflected on a rainy day.
4. Noise is decreased(2~4db)
5. A resisting force against abraison is excellent.
6. Life is prolonged(3~5times) and maintenance is economical because endurance is better than an exisiting pavement
7. 4~11 times stabler than compact density asphalt.
6. What is ACON(Additive)?
ASCON-CEL, a vegetable fiber(cellulose fiber), is not a smooth fiber of identical thickness. As shown in a figure, thickness is not uniform and has a flat figure. It also has ability enough to absorb a lot of asphalt because there are gaps on the surface. This is the product manufactured precisely in a granule type(cylindrical grain) in order to make dispersion easy by weighing and pouring these fibers.
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Cellulose Fibers: figure enlarged by 400 times
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ASCON-CEL
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7. Purpose and Function of ASCON-CEL
▶ ASCON-CEL is used on purpose to prevent asphalt from flowing down when the SMA mixture is manufacrured, transported and paved.
▶ A lot of thick pebbles are used for SMA and in order to enhance a resisting force against the brealaway and the crack of a lot of pebbles. At this time, ASCON-CEL(fiber additive) is used(increment of covering thickness) on purpose to keep a lot of asphalt stable.
▶ ASCON-CEL as a part of asphalt binders increases the endurance, the fatigue the and crack of the mixture against aging and moisture permeation. This is the characteristic of the SMA mixture structure.
8.Concept
of SMA mixed with
Cellulose Fibers
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<Phenomenon that asphalt
flows down>
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↘
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<ASCON pouring>
Asphalt aggregate is coated well by pouring Cellulose fibers
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<Asphalt is prevented from flowing and covering thickness is increased>
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↙
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9. Physical Property of ASCON
1. Cellulose Fibers
① maximum length: 5㎜
② average length: 1.2㎜
③ fiber pieces: 3.9 millions/g
2, Granules
① color: grey
② type: cylindrical pellet
③ gravity : 1.52/㎤
④ ingredient: fiber+little additive
⑤ moisture rate: about 6%
⑥ noxious ingrdient: none
10. How to use ASCON
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Items
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Contents
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Purpose
used
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It prevents the SMA mixture from bleeding or flowing down and is on purpose to minimize the breakaway and crack of aggregate by maximizing the effect letting aggregate go in gear.
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Standard
use volume
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Use 4kg/ton of the SMA mixture(the limit range of ASCON-CEL is ±
10% of a required fiber load. Additives can be added according to the blueprint or the specification.
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Mixing Method
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it is a pronciple to input through an automatc weighing and pouring device while aggregate heated in a weighing mill or a pug mill of the SMA manufacturing plant is filled
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Manufacturing
Temperature
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manufacture at higher temperature than the plain mixture so that
ASCON-
CEL can be dispersed and AP can be absorbed well.
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Mixing time
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Do dry mixing for 5 seconds and wet mixing for more than 40 seconds
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Applicable
structures
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Freeways. roads. streets, bridges, airports, ports
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※ Packing unit: ① 500㎏/Bag ② 1,000㎏/Bag
※ Please intall after consulting our company when you equip an automatic input device of ASCON-
CEL
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13㎜ SMA pavement
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Plain compact density asphalt pavement
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13㎜ SMA mixture testing body
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