Method Statement For Remedial Of Honeycomb At Structure Member

METHOD STATEMENT FOR REMEDIAL OF HONEYCOMB AT STRUCTURE MEMBERCase A: Superficial Honeycomb1. To identify the affected area2. Removed all the loose particles surrounding the affected area and make sure it was free from dust, grease and oil.3. Estimated the quantity of non-shrink grout and water to be used, gradually add the grout into the water and mix it by using spatula or slow speed drill to the consistency required (refer to the mixing ratio guide for water: grout ratio)4. Trowel able of stiff consistency mix is adopted to apply onto the affected area by using the steel trowel and leveled it to flush with the original structure member5. Repeat item 1 to 4 for any new affected area

Case B: More Severe Honeycomb (Cavity)

1. To identify the affected area2. Removed all the loose particles surrounding the affected area and make sure it was free from dust, grease and oil.3. Prepare and install the formwork for the grouting work around the defective area and leave about 25mm gap to pour the non-shrink grout.4. Estimate the quantity of non-shrink grout and water to be used, gradually add the grout into the water and mix it by using spatula or slow speed drill to the consistency required (refer to the mixing ratio guide for water: grout ratio)5. Pour the mix with non-shrink grout at high workability by using gravity flow6. Remove formwork after 24 hours and patch the 25mm gap with stiff mix non-shrink grout.7. Repeat item 1 to 4 for any new affected area

Materials1. Sika Grout-2152. 5 Star GroutPosted bymnyat10:03 P

(CAPACITY OF HYDROSEEDER 1, 000 liters)

HYDROSEEDING MIX1. Pump water into hydroseeder to level.2. Free gear and start engine.3. Put in mulch (if paper mulch is used 15 to 20 kg dry weight is recommended)4. Next add in 30 kg Soil Tackifier (R1187)5. Put in 8 to 10 kg grass seeds. You may add millet if you wish for fast establishment of greens/ vegitation.6. Add one bag (40-50 kg) of Bio-Super 1 fertilizer with the mixture.7. Finally top up with water.

METHOD OF APPLICATION Before engaging the gear, the person who will do the spraying must hold tight the nozzle and have firm footing on stable ground as he will expect a strong back-kick the moment the slurry shoots out of the nozzle. Do not shoot the slurry directly to the soil surface. Instead, it should be done in the form of raindrops in a uniform pattern. Ensure even coverage of slurry on soil surface. One machine load with proper application can cover approximately 600 to 700 m2. Watering (also in the form of raindrops) on the hydroseeded area can start immediately the next day and must be continued daily in the initial stage to ensure speedy germination and growth. Light watering will not help much due to our hot climatic condition. Therefore, sufficient and proper watering must be done ensuring water seep into the soil yet avoiding overflow of water on the soil surface.

NOTE:Hydroseeding shall never be applied during, before or immediately following rainfall. Avoid application in high winds. Machines and tools should be flushed and clean with water immediately after use. All moving parts should be oiled and greased regularly.Posted bymnyat2:22 PM