cement mill fdn4-strengthening-1
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8/9/2019 Cement Mill FDN4-Strengthening-1
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Ref: Navinatam/14-15/107 dt 20-01-2015
Ambuja Cements Ltd
Unit-ROPAR
Subject:- Strengthening of Cement Mill No 4 Foundation
Dear Sir,
As per site visit, study of NDT report and recommendations and discussions held with yourgood self, we propose the following system for strengthening of Cement Mill No 4
Foundation.
Technical Specification:
I- Surface preparation with mechanical tools to expose bare concrete and
achieve open pore structure and Impregnation with two liberal coats of
MONOPOL -High Molecular Weight Polymer (LV Grade) Grout
Monopolis a low viscosity high molecular weight thermoset polymer. Due to its low viscositycracks and honeycombs in concrete are filled upto full depth of concrete.
TYPICAL APPLICATIONS :For strengthening honeycombed concrete, cracks in RCC, rehabilitation of fire and explosiondamaged structures, sealer for concrete bridge decks, industrial floors, terraces, foundations,etc. repairs of TG foundations, Crusher foundation, Polymer impregnated concrete applications,for sealing cracks in concrete roads.UNIQUE ADVANTAGES :By virtue of low viscosity Monopol penetrates into the concrete even through fine hair cracks
and strengthens the matrix.Seals cracks/honeycombs in concrete under very low pressure of 5 10 Psi.
Grouting can be done by gravity pouring/pressure grouting.Excellent adhesion and chemical resistance.APPLICATION PROCEDURE:1. Surface preparation is an essential part of the application. It is necessary to clean and dry theconcrete surface prior to use.2. Mix Monopol as specified and use it for injection/pouring within scheduled pot life.3. Curing in air for 24 hours prior to use.TECHNICAL DATA:Base High Molecular Weight PolymerMix ProportionBase : Curing Agent975 gms. : 25 gmsToxicity Non Toxic on cure
Odour Non obstructiveViscosity 3 5 cpsApplication By gravity pouring / pressure grouting
Area = 30 Sqm approx
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I I- TREATMENT OF CRACKS WITH LOW VISCOSITY HIGH STRENGTH
EPOXY GROUTArea = 30Sqm
STEP 1: IDENTIFY THE CRACK LINES AND PREPAREUsing a sharp chisel/cutting wheel, wide chase along the entire length ofcrack to a minimum size of 5mm x 10 mm. The chase must be square shapedand deeper than it is wide.
STEP 2: Seal with Epoxy Putty
STEP 3: Fixing nipples/Ports at a distance of 300mm c/c along crack length.Approximate Length of cracks=30M, No of Nipple/Ports =100 Nos
STEP4: Pressure Grouting Low Viscosity High strength Epoxy groutEPCO KP/HP-250-SLV-Super Low Viscosity Epoxy InjectionGrouting Systeminto the fixed ports with the help of Electric grout Pumpuntil refusal starting from one end and moving to complete all ports.
STEP 5: Removal of all ports and filling of holes with epoxy putty.
III-TREATMENT OF FOUNDATION WALLS SURFACE AREA WITH CARBON
WRAPPING
STEP 1: Surface preparation and mechanical sanding of the surface to
even out any variations.
STEP 2: Epoxy Putty
STEP3: Primer Coat for Carbon wrap system
STEP4: Laying one layer of Carbon Fibre Cloth
STEP 5: Application of Saturant Coat on the spread Carbon Fibre Cloth
STEP6: Laying second layer of Carbon Fibre Cloth
STEP 7: Application of another Saturant Coat on the spread Carbon Fibre
Cloth
STEP8: Fixing Mechanical Fasteners on the Carbon Fibre Cloth of HILTI
Make by Bullet Technology @ 300mm c/c both ways
STEP 9: Application of PU based protective coating on the carbon fibre
wrapping application
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Area = 30Sqm
Mobilisation Time : 10days
Work Duration: 96 Hrs
Commercials:
S. No Description Unit & Qty Rate
(Rs/ unit)
Amount
(Rs))
1 Surface preparation for Monopole 30Sqm 200 6000.00
2. Application of Two coats of
Monopole
30 sqm 800 24000.00
3. Cracks chase cutting and sealing with
Epoxy Putty
30RM 300 9000.00
4. Fixing Mechanical Pakers/Nipples
after Drilling to desired depth
100 Nos 900 90000.00
5. Injecting Low viscosity High Strength
Epoxy Grout
100 Nos 1000 100000.00
6. Carbon Wrapping two layers
including Primer and saturant coats
30Sqm 8000 240000.00
7. Bullet Mechanical anchors of Hilti 1000 Nos 100 100000.00
8. PU based protective coating 30Sqm 600 18000.00
Total= 587000.00
Lump sump Discounted rates for Area =30sqm @All Complete @ Rs. 500000.00 consisting
of the above operations,
Any other query at your end will attract our utmost attention at all times.
Thanking you,
Regards,
FOR NAVINATAM CONSTRUCTION TECHNOLOGIES PVT LTD
Er. Devinder ChawlaDirector09216515590/09814115590