ROADCRETE MACADAM
A FAST SETTING, GENERAL PURPOSE INSTANT BITUMEN BASED ROAD REPAIR MORTAR
DESCRIPTION:
ROADCRETE MACADAM is a single part bitumen based road repair mortar composed of a factory controlled fully graded hard stone material, fine aggregates, formulated bitumen contains and special additives. It is a fast curing, high strength trowel applied mortar designed for instant rapid mortar. Its
rapid set characteristics allow a fast return of the road to traffic. The product is chloride free and can be safely used in contact with reinforcing steel. This material is capable of being applied in wet condition where the temperature ranges from 5 0 C TO 500 C.
BENEFITS:
• Excellent bond to concrete substrate
• Extremely low permeability provides protection against carbon dioxide and chlorides
• Rapid repair time
• High strength
• Fast setting
• Easy to use
• Cost effective instant road repair mortar
• Open for the traffic for shortage timing
• Can be used for man hole cover
• It will not peel, crumble, dust or crack
• Permanent repair to spelled & damaged concrete
• Freeze thaw durability better than standard concrete
• Minimum labour required.
TYPICAL PROPERTIES:
ROADCRETE MACADAM is conforming to requirement of ASTM D- 1664 and ASTM D-2027 modified as follows.
Flash point 790 c mini.
Sybolt furol viscosity at 600 c 200- 500 sec
Water 0.2% maxi.
Distillate test To 2250 c: None
To 2600 c 0-15%
To 3150 c 15-75%
Residual at 3600 c 73-90%
Residue tests:
Penetration at 250 c 150 -300
Ductility at 250 c 100 cm minimum
Solubility in trichloroethylene 99 % minimum
WHERE TO USE:
Permanent reinstatement of opening in carriageways, footways, cycles paths, private drives, reinstatement of pot holes. Remedial repairs around manholes.
LYING: Minimum thickness 15 mm.
CURING: No curing is required.
COVERAGE: The depth & width of pothole, crack, utility cut etc. will greatly influence the coverage rate achieved.
CLEAN UP: All tools should be cleaned immediately after use with a solvent base cleaner such as paint thinner or mineral spirit.
TESTING: FIVE CATEGORIES WERE DEFINED AND RATED AS FOLLOWS.
1. Bleeding: Is the flushing of the asphalt binder to the surface of the patch. IT caused by a combination of traffic loads, insufficient voids in the mix, or too much binder in the mix. Bleeding may cause poor skid resistance. – The use of open (gap) gradation and lower binder content should keep bleeding to a minimum.
2. Dishing: Is the further compaction of the patch under traffic loads. It is the result of material instability and inadequate compaction during the placement of the material. Compatibility is related to workability. Mixes with poor workability is difficult to compact. To determine the amount of dishing, a 1-m metal bar was placed across the patch parallel with the direction of travel. The amount of dishing was measured with a ruler accurate to 1.5 mm in the centre of each quadrant. The ratings were determined from the depth measurements.
3. Debonding: Occurs when the patch material loss its adhesion to the pavement at the bottom and/or sides of the pothole. When debonding occurs, the patch material can be pulled out of the hole by traffic, so the patch fails. It can be determined by disintegration i.e. the cracking cause at the edge of the patch for each quadrant. Missing patch was evaluated as a large scale loss of material. In some cases, these appeared to the cohesion failures rather than adhesion failures as all of the remaining particles were fully coated.
4. Raveling: is the loss of aggregate form the surface of the patch. Raveling is cause by stripping, poor cohesion, excessive fine aggregates and poor aggregates interlock of the patch material.
5. Pushing and shoving: is the vertical or horizontal movement of the patch material in the pothole.
The behavior of the ROADCRETE MACADAM in the above testing is very good.
WORKABILITY TEST:
The workability of the mixture was examined using the pennsylania transportation institute/ strategic highway research program (PTI / SHRP). For the PTI test, the sample is loosely placed in a 102 mm cubical box with a 10 mm hole centered on one side. A soil penetrometer with a round nose adapter 10 mm in diameter is pressed through the hole into the material. The value from the penetrometer is recorded as the workability reading.
The workability of the material was evaluated after they had been stored for 6 months as a measure of their storage ability.
The ROADCRETE MACADAM results of the workability surveys are good.
The evaluated at 7 and 14 days and 1, 3, 8, 9 and 12 months after placement.
PACKING AND COVERAGE:
ROADCRETE MACADAM is supplied 25 kg packs A 25 kg pack yields 12.5 ltr of mortars sufficient for 0.75m2 @ 25 mm thick.
