1 scope
This technology is applicable to General basement waterproofing for civil and industrial buildings, rigid waterproofing recommended; UEA shrinkage-compensating concrete in rigid waterproofing construction technology.
2 construction preparation
2.1 materials and equipment:
2.1.1 cement: No. 425, Portland cement and ordinary Portland cement or slag Portland cement, prohibited the use of expired, damp, deterioration of the concrete.
2.1.2 sand: suitable for sand, mud weight shall not be greater than 3%.
2.1.3 the stone: should be treated with pebbles, maximum size should not be larger than 40mm, clay is less than 1%, water absorption rate of less than 1.5%.
2.1.4 water: drinking water or natural water.
2.1.5 U.E.A expansive admixture: properties should conform to the industry standard of the concrete expansion agent (JC476-92), whose content should comply with the design requirements and the relevant provisions of, mixed with other additives when used, should be used in test after test.
2.1.6 major equipment: concrete mixers, dump trucks, trolleys, vibrators, chute, barrels, iron plate, shovel, skip, computing scales, and so on.
2.2 operating conditions:
2.2.1 processes on the reinforcing steel bar, complete handling implicit check, preflight procedures. Check wire or bolt through the concrete wall fixing template, if it is necessary to go through, water stopping measures should be taken. Especially pipes or embedded parts across the Department is ready for water treatment. Water the wood template ahead of moist, clean and within the template clutter.
2.2.2 according to the construction plan, technical clarification.
2.2.3 materials required by the test, by laboratory test of concrete mix, the impermeability of the trial should be graded according to the design requirements 0.2MPa.
2.2.4 where a high water table, continuing to rain during the construction of underground waterproof works and drainage.
3 operational processes
3.1 process
Ready → → mixing → transport → concrete pouring of concrete curing
3.2 concrete mixing: mixing mixing procedure: gravel water → → → → U.E.A expansion agent of cement sand.
Feeding dry mix 0.5~1min first and then adding water. Water three times to join, add water, stirring 1~2min (longer than conventional concrete mixing time 0.5min). Concrete mix must be strictly in accordance with the laboratory mix order before operation, no unauthorized changes. Weighing of bulk cement, sand, stone trucks, during the rainy season, moisture content of sand every day test, adjust the water. Mixing slump control 6~8cm, control of pump-delivery commodity concrete slump 14~16cm.
3.3 transport: concrete transportation continuous equilibrium of supply, the interval should not exceed 1.5h in summer and far distance may be appropriate addition of retarder, generally mixed with 2.5 ‰ ~3 ‰ calcium lignosulphonate. After the transport as a result of segregation, before pouring the second mix.
3.4 concrete: continuous casting should not remain less than construction joints.
3.4.1 floor as designed without leaving construction joint or on the late poured band.
3.4.2 wall body level construction sewing left in high out floor surface many Yu 200mm of wall body Shang, wall body as has holes, construction sewing from holes edge should not be less than 300mm, construction sewing form should be with convex sewing (wall thick is greater than 30cm) or stepped sewing, and straight sewing added metal check water tablets (wall thick is less than 30cm), construction sewing should be do enterprises mouth sewing and B.W check water article processing vertical construction sewing should be and Hou poured with, and deformation sewing phase combined.
3.4.3 prior to pouring concrete construction joints, concrete surface should be cutting hair, remove debris, rinse and moist, then a 2~3cm layer of cement mortar (that is, the original mix to remove stones), or the same mix of gravel concrete, poured the first step is 40cm, after each step of pouring 50~60cm, strictly according to the construction plan provided for order placement. Lean concrete high free falls should not be greater than 2m, such as height of more than 3M, use buckets of chute, falling.
3.4.4 application of mechanical vibration to ensure concrete density, vibration time 10s should not leak vibration or vibration, vibrating extended time floating on the surface of concrete grouting, no bubbles, not sink it. Shop dust and vibration should be chosen symmetric position, preventing the template structure section smaller, steel-intensive parts of strictly hierarchical pouring and layered tamping demand operation, poured to the top surface, you must use wood put on leveling and compacting the surface flat.
3.5 conservation: room temperature (25℃) pour 6~10h thatch watering after conservation, to keep the surface moist, maintenance of not less than 14d.
3.6 winter construction: sand and water according to the winter program provides heating, should ensure that the concrete into the mold temperature not less than 5 ° c, using an integrated method of heat insulation maintenance, winter mix antifreeze should be used in the certification of products. Removal of concrete surface temperature and ambient temperature differences of less than 15 degrees centigrade.
4 quality criteria
4.1 project:
4.1.1 raw material of waterproof concrete, admixtures and embedded parts must comply with the design requirements and provisions relating to standard construction specifications, check the factory certificate, the test report.
4.1.2 the impermeability of waterproof concrete and strength must conform to the design requirements, check the ratio and sample test report. Impermeability test 500m3 the following two groups, a set of standard curing, a group of the same curing condition, conservation 28D, each increased 250~500m3 increased in both groups.
4.1.3 construction joints and deformation joints, waterstop, through-wall tubes, touched iron sets and construction shall meet the specification for design and construction requirements, no leakage.
4.2 Basic project:
Concrete surface is smooth, without exposed reinforcement, cellular defects, embedded parts in place.
4.3 allowable deviation, as shown in table 3-1.
5 finished product protection
5.1 protecting reinforcing steel bar, size is correctly positioned, not stampede steel formwork, reinforcement and no collision, changes.
5.2 dismounting when lifting or other objects shall not be damaged joint tongue and Groove construction, and water stop.
5.3 protecting the wall pipe, wire and pipe, switch boxes and embedded parts, vibration when squeezed or embedded into the concrete.
6 quality problems that should be noticed:
Table 3-1
Tolerance (mm)
Frame high mode
1 axis displacement 5 foot check
2 floor elevation ± 5 ± 10 level or standard of inspection
+5
-2
Check every 5 2m supporting plate
High H/1000 with a theodolite or hanging and foot check
5 smooth 8 4 2m m on foot and wedged feeler Gage check
6 embedded copper center line position offset 10
7 embedded pipe bolt centre line shift 5
H/1000 vertical full height by hanging 8 shaft and foot check
6.1 is strictly prohibited in any water within the concrete, strictly control the water/cement ratio, ratio had a general influence U.E.A expansion rate of shrinkage-compensating concrete, directly affect the compensation shrinkage and reduce the effects of shrinkage cracking.
6.2 detailed structure is waterproof and vulnerability, should be reviewed before construction drawings, special parts, such as expansion joints and construction joints, through-wall pipe, embedded parts details carefully.
6.3 basement waterproofing must be waterproof construction of the professional team, the technical director and the team leader must hold a certificate. Completion of construction, finishing construction technology of information in a timely manner, making the total package archive. Basement waterproofing warranty for three years, leakage is responsible for repair.
6.4 wall casing of tube embedded with sealing ring, embedded fixed prior to pouring concrete, sealing ring around the careful vibration compacting, for prevention of vibration, supervisor and as designed with waterproof sealants seal the casing.
6.5 structure deformation sewing should strictly by design requirements for processing, check water with location to fixed accurate, around concrete to carefully pouring vibration pound, guarantee dense, check water with shall not offset, deformation sewing within fill asphalt wood Silk Board or polyethylene bubble rod, sewing within 20mm at fill waterproof sealed cream, in welcome water Shang added Pu a layer waterproof volume material, and wipe 20mm waterproof mortar protection.
6.6 post-pouring seam for six weeks after the concrete has been poured, should be based on the original design U.E.A rating level of concrete shrinkage-compensating concrete, pour former Cha to clean conservation 28D.
7 quality records
This standard shall meet the following quality records:
7.1 materials (cement, sand, stone, U.E.A, admixtures, etc) the quality of certificates and test reports.
7.2 test report concrete block. (Including pressure resistance and impermeability test block).
7.3 hidden inspection records.
7.4 design change and record of negotiation.
7.5 quality inspection and assessment of the project.
7.6 other technical documents.
This technology is applicable to General basement waterproofing for civil and industrial buildings, rigid waterproofing recommended; UEA shrinkage-compensating concrete in rigid waterproofing construction technology.
2 construction preparation
2.1 materials and equipment:
2.1.1 cement: No. 425, Portland cement and ordinary Portland cement or slag Portland cement, prohibited the use of expired, damp, deterioration of the concrete.
2.1.2 sand: suitable for sand, mud weight shall not be greater than 3%.
2.1.3 the stone: should be treated with pebbles, maximum size should not be larger than 40mm, clay is less than 1%, water absorption rate of less than 1.5%.
2.1.4 water: drinking water or natural water.
2.1.5 U.E.A expansive admixture: properties should conform to the industry standard of the concrete expansion agent (JC476-92), whose content should comply with the design requirements and the relevant provisions of, mixed with other additives when used, should be used in test after test.
2.1.6 major equipment: concrete mixers, dump trucks, trolleys, vibrators, chute, barrels, iron plate, shovel, skip, computing scales, and so on.
2.2 operating conditions:
2.2.1 processes on the reinforcing steel bar, complete handling implicit check, preflight procedures. Check wire or bolt through the concrete wall fixing template, if it is necessary to go through, water stopping measures should be taken. Especially pipes or embedded parts across the Department is ready for water treatment. Water the wood template ahead of moist, clean and within the template clutter.
2.2.2 according to the construction plan, technical clarification.
2.2.3 materials required by the test, by laboratory test of concrete mix, the impermeability of the trial should be graded according to the design requirements 0.2MPa.
2.2.4 where a high water table, continuing to rain during the construction of underground waterproof works and drainage.
3 operational processes
3.1 process
Ready → → mixing → transport → concrete pouring of concrete curing
3.2 concrete mixing: mixing mixing procedure: gravel water → → → → U.E.A expansion agent of cement sand.
Feeding dry mix 0.5~1min first and then adding water. Water three times to join, add water, stirring 1~2min (longer than conventional concrete mixing time 0.5min). Concrete mix must be strictly in accordance with the laboratory mix order before operation, no unauthorized changes. Weighing of bulk cement, sand, stone trucks, during the rainy season, moisture content of sand every day test, adjust the water. Mixing slump control 6~8cm, control of pump-delivery commodity concrete slump 14~16cm.
3.3 transport: concrete transportation continuous equilibrium of supply, the interval should not exceed 1.5h in summer and far distance may be appropriate addition of retarder, generally mixed with 2.5 ‰ ~3 ‰ calcium lignosulphonate. After the transport as a result of segregation, before pouring the second mix.
3.4 concrete: continuous casting should not remain less than construction joints.
3.4.1 floor as designed without leaving construction joint or on the late poured band.
3.4.2 wall body level construction sewing left in high out floor surface many Yu 200mm of wall body Shang, wall body as has holes, construction sewing from holes edge should not be less than 300mm, construction sewing form should be with convex sewing (wall thick is greater than 30cm) or stepped sewing, and straight sewing added metal check water tablets (wall thick is less than 30cm), construction sewing should be do enterprises mouth sewing and B.W check water article processing vertical construction sewing should be and Hou poured with, and deformation sewing phase combined.
3.4.3 prior to pouring concrete construction joints, concrete surface should be cutting hair, remove debris, rinse and moist, then a 2~3cm layer of cement mortar (that is, the original mix to remove stones), or the same mix of gravel concrete, poured the first step is 40cm, after each step of pouring 50~60cm, strictly according to the construction plan provided for order placement. Lean concrete high free falls should not be greater than 2m, such as height of more than 3M, use buckets of chute, falling.
3.4.4 application of mechanical vibration to ensure concrete density, vibration time 10s should not leak vibration or vibration, vibrating extended time floating on the surface of concrete grouting, no bubbles, not sink it. Shop dust and vibration should be chosen symmetric position, preventing the template structure section smaller, steel-intensive parts of strictly hierarchical pouring and layered tamping demand operation, poured to the top surface, you must use wood put on leveling and compacting the surface flat.
3.5 conservation: room temperature (25℃) pour 6~10h thatch watering after conservation, to keep the surface moist, maintenance of not less than 14d.
3.6 winter construction: sand and water according to the winter program provides heating, should ensure that the concrete into the mold temperature not less than 5 ° c, using an integrated method of heat insulation maintenance, winter mix antifreeze should be used in the certification of products. Removal of concrete surface temperature and ambient temperature differences of less than 15 degrees centigrade.
4 quality criteria
4.1 project:
4.1.1 raw material of waterproof concrete, admixtures and embedded parts must comply with the design requirements and provisions relating to standard construction specifications, check the factory certificate, the test report.
4.1.2 the impermeability of waterproof concrete and strength must conform to the design requirements, check the ratio and sample test report. Impermeability test 500m3 the following two groups, a set of standard curing, a group of the same curing condition, conservation 28D, each increased 250~500m3 increased in both groups.
4.1.3 construction joints and deformation joints, waterstop, through-wall tubes, touched iron sets and construction shall meet the specification for design and construction requirements, no leakage.
4.2 Basic project:
Concrete surface is smooth, without exposed reinforcement, cellular defects, embedded parts in place.
4.3 allowable deviation, as shown in table 3-1.
5 finished product protection
5.1 protecting reinforcing steel bar, size is correctly positioned, not stampede steel formwork, reinforcement and no collision, changes.
5.2 dismounting when lifting or other objects shall not be damaged joint tongue and Groove construction, and water stop.
5.3 protecting the wall pipe, wire and pipe, switch boxes and embedded parts, vibration when squeezed or embedded into the concrete.
6 quality problems that should be noticed:
Table 3-1
Tolerance (mm)
Frame high mode
1 axis displacement 5 foot check
2 floor elevation ± 5 ± 10 level or standard of inspection
+5
-2
Check every 5 2m supporting plate
High H/1000 with a theodolite or hanging and foot check
5 smooth 8 4 2m m on foot and wedged feeler Gage check
6 embedded copper center line position offset 10
7 embedded pipe bolt centre line shift 5
H/1000 vertical full height by hanging 8 shaft and foot check
6.1 is strictly prohibited in any water within the concrete, strictly control the water/cement ratio, ratio had a general influence U.E.A expansion rate of shrinkage-compensating concrete, directly affect the compensation shrinkage and reduce the effects of shrinkage cracking.
6.2 detailed structure is waterproof and vulnerability, should be reviewed before construction drawings, special parts, such as expansion joints and construction joints, through-wall pipe, embedded parts details carefully.
6.3 basement waterproofing must be waterproof construction of the professional team, the technical director and the team leader must hold a certificate. Completion of construction, finishing construction technology of information in a timely manner, making the total package archive. Basement waterproofing warranty for three years, leakage is responsible for repair.
6.4 wall casing of tube embedded with sealing ring, embedded fixed prior to pouring concrete, sealing ring around the careful vibration compacting, for prevention of vibration, supervisor and as designed with waterproof sealants seal the casing.
6.5 structure deformation sewing should strictly by design requirements for processing, check water with location to fixed accurate, around concrete to carefully pouring vibration pound, guarantee dense, check water with shall not offset, deformation sewing within fill asphalt wood Silk Board or polyethylene bubble rod, sewing within 20mm at fill waterproof sealed cream, in welcome water Shang added Pu a layer waterproof volume material, and wipe 20mm waterproof mortar protection.
6.6 post-pouring seam for six weeks after the concrete has been poured, should be based on the original design U.E.A rating level of concrete shrinkage-compensating concrete, pour former Cha to clean conservation 28D.
7 quality records
This standard shall meet the following quality records:
7.1 materials (cement, sand, stone, U.E.A, admixtures, etc) the quality of certificates and test reports.
7.2 test report concrete block. (Including pressure resistance and impermeability test block).
7.3 hidden inspection records.
7.4 design change and record of negotiation.
7.5 quality inspection and assessment of the project.
7.6 other technical documents.
No comments:
Post a Comment