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RM | Raphahcon RM


Raphahcon RM-Refractories Mortar

Raphahcon RM

Refractories Polymer Mortar

Catalog Download (360.1K)

Test report Download (390.2K)

Raphahcon RM is fireproof mortar for recovering, repairing and reinforcing sections 

of deteriorated concrete structures. 

As a material for repairing and reinforcing structures exposed to the working 

environment where the fire resistance is (S.K.)11(1,320℃) or below, 

this one ingredient type mortar can be used after being added with just water. 

Spray operation becomes easy with this product, and its workability and 

economic efficiency have been greatly improved to be suitable 

for large-scale repairs. 


1. The product has a high strength, low cracking occurrence, and excellent 

   workability as one ingredient type which only needs to be mixed with 

   water for use.

2. It is economical owing to the low rebound rate of 5% or less and highly durable 

   because it is inorganic like concrete.

3. The result of a fire resistance (S.K.) test is 11(1,320℃), displaying excellent 

   compressive strength even at a high temperature. 

4. The product is highly adhesive, anti-rust, neutralization-resistant, 

   chemical-resistant, and chlorine ion penetration-resistant.



1. Concrete structures exposed to high temperature, such as cupolas of steel mills

2. Special concrete structures receiving heat, such as chimneys and silos 

3. Concrete structures exposed to high temperature among facilities related to the 

   ceramic industry 

4. Concrete structures exposed to high temperature among facilities related to the 

   placing industry



 One ingredient-type inorganic gray polymer mortar 



  1. Treatment of construction surface 

        (1) Chip deteriorated and corroded concrete.

       (2) Remove dirt, laitance, etc. attached to construction surface in order to 

           improve adhesion.

       (3) As oil and fat powder significantly reduces the adhesion, these shall be 

           completely removed with an organic solvent.


    2. Mixing

       (1) Put the right quantity water in a mixer, slowly inject Raphahcon RM and mix 

           them with a mixer for over three minutes. 

       (2) Use tap water (clean fresh water) of the temperature between 5℃ and 20℃.

       (3) Inject about 2/3 of specified moisture, mix for about 1~2 minutes, slowly add 

           the remaining 1/3 water, and check until good workability appears.  

       (4) The right quantity of water shall be achieved when you hold mixed mortar in 

           your hand slightly spreading your fingers, and mortar shall not flow down 

           among fingers.    

       (5) If concrete is kneaded thinly and contains much water, the remainder  

           will not react with alumina cement, rather it forms pores, which shortens 

           the life span.  

       (6) When there is not enough water, the fluidity will decrease, and filling 

            won’t be made properly, causing quality deterioration. 

            Therefore, the right amount of water shall be added.

    4. Placing

       (1) The mixed product shall be immediately placed on construction surface. 

       (2) Placing can be done using a trowel or a spray. 

       (3) For increasing thickness, do spray operation and plastering to a thickness 

           of 0.5-1cm during the first placing, make it 2-5cm thicker during the second 

           and third placings, and finish it with an additional 0.5-1cm of thickness during 

           the final placing. 

          (The adhesion and plastering will get better through doing primary and 

           main placing thinly and re-placing thickly.)

 5. Curing and drying

       (1) Curing shall be done sufficiently for over 24 hours after construction 

            to maintain strength. 

       (2) Be careful during curing because vibration and shock can cause cracks. 

       (3) Temperature of over 5℃ shall be maintained during winter. 

           There is a danger of freezing at night, so insulation shall be done.   

       (4) When a mold is built, cracks may occur when excessive force is applied 

           while dismantling the mold.  

       (5) Thermal resistance can be obtained by removing water used for 

           construction, so drying shall be performed with a proper heat source 

           after construction. 

       (6) Be careful because rapid heating and local heating while drying can cause

           spalling failure.   

       (7) Dry temperature rising after curing will be adjusted according to 

           construction thickness and construction conditions, but regular 

           standards shall be as follows. 

           (In the case of small construction, dry temperature rising time can be short.)

            First : 10 hours at 100℃~200℃

            Second : 40 hours at 200℃~500℃

            Third : 10 hours at 500℃~1000℃



1. Protect the application area  from rain or snow until it gets dry. 

2. Wear protective equipment, such as masks, goggles and gloves, while working. 

3. Be careful when curing at a temperature below 5℃.



 25 kg/bag, can keep in dry places for six months



 Test Results

Test Item



Test method

Setting time

Initial setting

hrs. : min

3 30

KS F 2476 : 2019

Final setting

hrs. : min 

4 40



Material age 1 day



Material age 3 day



Material age day



Material age 28 day



Flexural strength

Material age 28 day



Bonding strength

Material age 28 day



Thermal conductivity 



KS L 9016 : 2010


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