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- 대화정밀공업은 최고 품질의 자재를 생산하기 위해 노력합니다.
- Epoxy Mortar
- Goods View
- DH-EM30 Resin Mortar DH-EM50 Super-light Mortar DH-EM80 Epoxy Mortar DH-100 Old-new adhesive
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Epoxy Mortar
DH-100 Old-new adhesive
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- Feature & Purpose
- DH-100 is Adhesive of New & Old Concrete for Prevent of Structure aging
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- attached file2
DH-100 old-new adhesive is an epoxy resin which is used to prevent deterioration of adhesive strength when a new cement mortar is applied to the existing concrete structure. DH-100 provides high adhesive strength with the existing concrete,and is not affected by the new cement mortar or concrete hydration, providing complete integration adhesion between old and new concrete.
It provides enough adhesive strength for concrete or reinforcing bars due to the high adhesive strength of epoxy resin.It does not produce any cracks (poor interfacial adhesion) caused by the volume reduction, for it has a stable weather-resistance regardless of natural condition of high or low temperatures, and almost no shrinkage resulting from hardening reaction.It is not affected by external impact, vibration or tensile strength, for it provides a perfect reinforcement to low strength and aged surface strength of new or old concrete.It provides a perfect integration because it triggers hydration of newly placed cement mortar or concrete followed by absorption hardening.It is not affected by moisture included in the cement mortar because of its underwater-hardening epoxy structure, providing a good adhesiveness even at a wet matrix.It does not oxide the adhesive surface because there is no neutralization with concrete due to a weak alkaline property, providing a good adhesiveness.New/existing concrete adhesion, hardening concrete adhesion.Recovery of the cut end and primer for resin mortar operation.Epoxy primer for wet surface.Concrete adhesion such as decorative design mortar and floor-finishing mortar.Adhesion reinforcement when tiling at outer wall and wet surface.DH-100 Dimension Details DH-100 Dimension Details Classification Main Component Hardening Component Remarks Exterior Appearance White Liquid Brown Liquid - Mixing Rate 100 20 Specific Gravity 1.25 ± 0.1 1.02 ± 0.1 23±0.5℃ Mixture Viscosity(mPa.s) 700±50 23±0.5℃ Pot Life(Min) 30±10 23±0.5℃ Tack Free Time(Hours) 8±2 23±0.5℃ Hardening Time(Hours) 24 ~ 36 - Packing Unit 10kg 2kg - DH-100 Property Data DH-100 Property Data Test Category Result Value Base Value Test Method Adhesive Strength ( N/㎟ ) 8.8 Over 6 KS F 4923 Seal Breaking Expansion Rate ( % ) 1.7 Under 10 Seal Strength ( N/㎟ ) 41.2 Over 15 Hardening Contraction Rate ( % ) 1.9 Under 3 Heating Change (110±3℃,168hr) Weight Change Rate ( % ) 1.0 Under 5 Volume Change Rate ( % ) 0.9 Under 5
Pot Life the period of time during which you can work without a change in viscosity after resin and hardener are mixed.Tack Free the state of hardening in which you can lightly touch the mixed resin with your hand, but the hardened material does not stick.Hardening Time the time it takes for the mixed resin to be hardened enough to realize about 80% of final mechanical strength.Limitation on the workWork shall not be allowed when the ambient temperature of the job site goes out of the range of 5℃~30℃ or the humidity is over 85%. Work is not allowed for the area where concrete is wet or set with more than 10% moisture in it or polymerized. To prevent the condensation of moisture, the surface temperature of surface temperature must be higher than the dew point at least by 3℃E and the relative humidity shall be lower than 85%. As this product is two-component chemical which hardens at normal temperature, you have to mix the main material with the hardener based on exact weight. The mixed chemical is greatly affected temperature, volume of mixture and pot life. Pot life and hardening time will be shortened if the main material and the hardener are mixed in large volume or used in high temperature or used while the temperature of chemical is high. Therefore, you have to mix in small volume in summer and artificially raise the temperature of resin in winter to improve the working efficiency. Surface Treatment- Remove laitance, dust, oil, moisture and other foreign substances of lower surface of concrete.
(Unless impurities are completely removed, de-lamination can occur due to poor adhesion)
- Smooth the lower surface by using polisher, sand blast, sand grinder and wire brush etc.
- The surface should have fine ruggedness like sandpaper in order to ensure maximum adhesiveness.String new and existing adhesive- Meter main materials and hardeners of new/existing adhesives, to be compatible with the mix ratio(weight ratio), to a clean vessel and stir them appropriately using an electric mixer for 2 minutes to ensure an uniformity.
- After the first stirring, goes to the second stirring by pouring it to another mixture case and stirring it for 2 to 3 minutes with an electric mixer to ensure the uniform mixture.
- Ensure that the amount of stirring is an appropriate amount to be used with in pot life.Application- DH-100 is usually not diluted by a solvent because it is a solvent-free epoxy resin. Your special attention is necessary because excessive dilution may cause a delay in hardening process and lead to poor strength and defects like cracks etc.
- If there exists oil on the lower surface during primer coating, primer may produce something like water droplets. So, please never fail to remove oil before you resume primer coating work. (For the surface whose absorption is excessive, please apply primer coating two times to prevent loss of mortar due to the infiltration into the surface and the possibility of poor adhesion)
- The task ranging from start of resin stirring to coating should be done within pot life. If the temperature of the mixed resin gets increased or you need more effort to do the task due to a higher viscosity,you need to stop using it and do away with it because it means pot life is over.
- Be cautious that existing concrete matrix is not to be wet before coating the adhesive to ensure a good adhesiveness.
- If the adhesive gets tough due to passing of placement time after the adhesive is coated, then it loses adhesiveness followed by possibly separation. So you need to check the placement time frequently while preceding the task.
- If the placement time passed, coat the adhesive again and place it.All the equipments and tools that are used for this operation should be cleaned when the operation is finished. Detergent such as M.E.K, Acetone, Xylene, Toluene and epoxy thinner should be used when cleaning. If the Foam is smeared on your skin during the performance, wash it immediately with flowing water.- When you treating medical fluid, make sure you wear protective helmet, goggle clothes and other protective devices.
- If the medical fluid is smeared on your skin, wash it off immediately and clean up with soapy water.
- All the hand tools and equipments that are used for this operation should be cleaned with thinner thoroughly.
- If you are working in sealed room, then make sure to conduct constraint ventilation for clean air.
- If the medical fluid is smeared on your skin and causes skin trouble, then you should go see specialist for prescription.
- If the temperature is below 5℃, then you must artificially raise up the temperature of medical fluid. This way you can get proper Pot Life.
- If the atmosphere temperature is high and the area is humid, Pot Life of medical fluid quickens. On the contrary, Pot Life will slow down in low temperature area.
- Be aware of it before you conduct the operation.Recommended temperature for storage is 10~25℃ with no moisture. Store it in cool area. Storing period is about 6 months in sealed condition however it can be corrupted according to storing area and conditions. Preferably use it as soon as possible.
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