| Teaching & Learning > eHandbook > eConstruct > Maintenance I | |
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| | Introduction | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | |
| FLEXIBLE CEMENTITIOUS MEMBRANE (FCM) | |
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XYPEX Flexible Cementitious Membrane (FCM) is an elastic coating system that's primary applications are, applied as an external water stop and applied over cracking subject to thermal influences. |
| ADVANTAGES |
| SURFACE PREPARATION: REMOVE all loose concrete, dirt, dust, oil, grease, release agents, curing and cleaning compounds or other bond inhibiting materials from the surface and clean thoroughly by sand blasting or high-pressure water jet, etc. The concrete substrate can be either dry or moist, (superficially surface dry, SSD) excess or free standing water must be removed. |
| TECHNICAL DATA: |
| Adhesion: | 0.58 mpa at 0°C 0.70 mpa at 20°C |
| Elongation: | 3mm elongation with a coating thickness of 3 - 3.6mm |
| Resistance to Tear: | 0.30 mpa (no-reinforced) |
| Elongation at Tear: | 72% |
| Water pressure | 30.5m of head pressure |
| Limitations: | (7 bar) on positive side 7m of head pressure (1.6 bar) on negative side. |
| CRACK AND FAULTY CONSTRUCTION JOINT REPAIR AGAINST A FLOW OF WATER | |
| SECTION A - LOW HYDROSTATIC PRESSURE AND MINIMUM WATER FLOW | |
| STEP 1 | Rout out crack/joint in a "U" shaped slot 1 inch wide and at least 11/2 inches deep. |
| STEP 2 | Remove all loose material and saturate with water |
| STEP 3 | Apply one slurry coat of XYPEX "Concentrate" at a coverage and to 6 inch strip on either side of slot. |
| STEP 4 | While slurry coat is still tacky, fill slot to surface with XYPEX "Concentrate" mixed by adding 1 part clean water to 6 parts "Concentrate". Blend by trowel for 10 to 15 seconds only. |
| STEP 5 | Wet Dry-Pac surface lightly with water, then apply a slurry coat of XYPEX "Concentrate" over the repaired area. |
| STEP 6 | For curing, fog spray periodically with water for two days or apply XYPEX "Gamma Cure" immediately after the slurry coat has set. |
| SECTION B - LOW HYDROSTATIC PRESSURE WITH HIGH WATER FLOW | |
| STEP 1 | Rout out crack/joint in a "U" shaped slot 1 inch wide and at least 11/2 inches deep. |
| STEP 2 | Remove all loose material and saturate dry areas with water. |
| STEP 3 | On the areas of most water flow, apply a XYPEX Ultra-Plug. An Ultra-Plug is made by mixing 1 part XYPEX "Ultra" powder with 1 part XYPEX "QuickSet". |
| STEP 4 | Apply a slurry coat of XYPEX "Concentrate" at a coverage by hand or by brush |
| STEP 5 | While slurry coat is still tacky, fill slot to surface with XYPEX "Concentrate" mixed in Dry-Pac consistency. |
| STEP 6 | Wet the Dry-Pac lightly with water, then apply a slurry coat of XYPEX "Concentrate" at a coverage |
| STEP 7 | For curing, fog spray periodically with water for two days, or apply XYPEX "Gamma Cure". |
| SECTION C - MODERATE HYDROSTATIC PRESSURE AND ANY WATER FLOW | |
| STEP 1 | Rout out crack/joint in a "U" shaped slot 1 inch wide and at least 2 inches deep. |
| STEP 2 | Remove all loose material and saturate dry areas with water. |
| STEP 3 | Apply one slurry coat of XYPEX "Concentrate" at a coverage. |
| STEP 4 | Fill slot up to 1 inch below surface with a XYPEX Ultra-Plug |
| STEP 5 | Apply a slurry coat of XYPEX "Concentrate" at a coverage of 11/2 pounds per square yard over the Ultra-Plug. |
| STEP 6 | After slurry has begun to set, fill slot to surface with XYPEX "Concentrate" Dry-Pac. |
| STEP 7 | Wet the Dry-Pac lightly with water, then apply a slurry coat of XYPEX "Concentrate" over the repaired area. |
| STEP 8 | For curing, fog spray periodically with water for 2 days or apply XYPEX Gamma Cure immediately after the slurry coat has set. |
| SECTION D - HIGH HYDROSTATIC PRESSURE WITH MINIMUM WATER FLOW For section D,all procedures for the making purpose are same as section C,except for step 3 & 4. |
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| STEP 3 | Apply one coat of XYPEX "Concentrate" at a coverage of 11/2 pounds per square yard into the slot and on a strip extending 6 inches on either side of slot by hand or by brush. |
| STEP4 | Fill complete length of slot to 11/4 inches below surface with a XYPEX Ultra-Plug |
| SECTION E - HIGH HYDROSTATIC PRESSURE WITH MODERATE TO HIGH WATER FLOW | |
| STEP 1 | Rout out crack/joint in a "U" shaped slot 1 inch wide and to a minimum depth of 21/2 to 3 inches. On all areas of high water flow, drill at least 1/2 inch deeper than the slot, to accommodate a bleeder hose. |
| STEP 2 | Remove all loose material and saturate dry areas with water. |
| STEP 3 | Apply one brush coat of XYPEX "Concentrate" at a coverage of 11/2 pounds per square yard into the slot and on a strip extending 6 inches on either side of the prepared slot. If a water flow is present, brush coat whatever surfaces mentioned above that are not covered by a flow of water. |
| STEP 4 | Place bleeder hose end into hole(s) mentioned in Step 2. (Bleeder hose is composed of a minimum 11/2 foot length of smooth surfaced, fairly rigid tubing). |
| STEP 5 | While holding hose steady, apply a XYPEX Ultra-Plug into slot around the pipe. Approximately 2 to 4 applications of Ultra-Plug should be required to embed the tubing completely up to surface level. |
| STEP 6 | Apply XYPEX "Ultra-Plug" along complete length of slot at a thickness of 11/2 inches |
| STEP 7 | Apply one coat of XYPEX "Concentrate" in slot at coverage of 11/2 pounds per square yard. |
| STEP 8 | Fill slot to surface with a XYPEX Dry-Pac. Compress Dry-Pac very tightly into slot using pneumatic packing device or with hammer and block. |
| STEP 9 | Wet Dry-Pac lightly with water then apply a slurry coat of XYPEX "Concentrate" over Dry-Pac in slot at a coverage of 11/2 pounds per square yard. |
| STEP 10 | Water cure for 2 days or apply a coat of XYPEX "Gamma Cure" immediately after the slurry coat has set. |
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