Shear wall structure template ordinary concrete construction
1 scope
This technology standard is suitable for the brick structure, brick mold, plate internal model of the constructional column, ring beam and plate seam concrete pouring process.
2 construction preparation
2.1 material and this machines:
2.1.1 cement: with 325 ~ 425 # slag Portland cement and ordinary Portland cement.
2.1.2 sand: with coarse sand and medium sand, when the concrete is below the C30, silt content is not more than 5%.
2.1.3 stones, constructional column and ring beam with diameter: 0.5 ~ 3.2 cm pebbles or gravel; Joints with particle size of 0.55 ~ 1.2 cm fine stone, when the concrete is below the C30, silt content is not more than 2%.
2.1.4 water: use clean water without impurities.
2.1.5 admixture: according to the requirements of early strength agent, water reducing agent, etc., use mix be determined by the laboratory.
2.2 operation conditions:
Notice of proportion of 2.2.1 confirmed by laboratory concrete mixture ratio, and is consistent with the use of material.
2.2.2 template is firm, stable, elevation, size comply with the design requirements, such as gap in excess of the prescribed template, to plug, and completed preview procedures.
2.2.3 reinforced completed school inspection procedures.
2.2.4 structure to loose concrete and mortar, ring beam if place should be removed and debris to clean up within a template.
2.2.5 under normal temperature, before concrete pouring, brick, wood pattern should right amount water wet in advance, but can not have water.
3 operation process
3.1 process:
Homework to prepare to apply to concrete mixer, concrete transportation to concrete pouring and vibrating, concrete curing
Concrete mixing 3.2:
3.2.1 according to determine the moisture content of sand, stone, adjust the mixing proportion of water consumption, rainy days should be to increase the number determination.
3.2.2 according to blender dosage of every plate of various materials and wagon weight, respectively fixed cement (bulk), sand, stone all scales of scalar. The scale should be check regularly, maintenance, to ensure the accuracy of the measurement. Measuring accuracy: cement and admixture is plus or minus 2%, aggregate is plus or minus 3%, water, admixture is plus or minus 2%. Mixer of concrete panels should be set up.
3.2.3 formal stirring mixer empty before commissioning, normal rear can officially charging mixing.
3.2.4 sand, stone, cement (bulk) must be in strict accordance with the need to use the weighed respectively, add water must also be strict measurement.
3.2.5 loading sequence: pour the stones, pour cement, sand, after finally adding water. Join admixtures when pouring cement. Mineral admixture and water at the same time to join.
3.2.6 coagulation mixing the first set, can be appropriate when charging short-ship some stones or appropriate increase of cement and water.
3.2.7 concrete mixing time, fell 400 l mixer generally should not be less than 1.5 min.
3.2.8 concrete slump, general control in 5 to 7 cm, each affecting measure should be twice.
3.3 concrete transportation:
3.3.1 the concrete mixer after discharge, immediately with skip skip to casting, carts or location. When transporting concrete, should prevent the slurry erosion. If there is segregation phenomenon, should be at the second batch casting location manually.
3.3.2 rainfall distribution on 10-12 concrete with mixer to the duration of the casting, after discharged when for C30 concrete, and the following, shall not be greater than 90 min when temperature above 25 ℃, C30 above shall not be greater than 60 min.
Concrete pouring and vibrating 3.4:
3.4.1 track, constructional column base construction joints should be first before casting shop 5 cm thick with cement mortar or concrete mixture ratio of the same stone concrete.
3.4.2 casting method: using cranes skip feeding, should first will skip down to 50 ~ 60 cm away from the iron plate, cast concrete on the iron plate, and then into a mould with a spade, don't skip directly to the concrete application of discharging into the mould.
Rule 3.4.3 concrete constructional column, the first will be the root of the vibrating rod inserted into the column bottom, make its vibration impregnated with concrete, should stratified pouring, vibrating, each layer thickness less than 60 cm, blanking and vibrating, general casting height should not be greater than 2 m, if you can ensure the casting is close-grained, each layer of a casting.
3.4.4 concrete vibratory: when vibrating constructional column, vibrating stick close to wall insert. Ofnon-vibrating concrete ring beam, the vibration rods and concrete surface should be bevel, oblique vibrating. Vibrating plate joint of concrete, should choose phi 30 mm small vibrating rod. Vibrating thickness should not be more than 1.25 times of vibrating rod.
3.4.5 pouring concrete, attention should be paid to protect reinforced location and waterproof structure, brick wall, cladding outside not to damage it, check whether template, steel bar deformation, displacement; Bolts, rod is loose, fall off; Find the phenomenon such as leak slurry, appoint the overhaul.
3.4.6 surface flattening, ring beam, for every completed a vibrating plate seam concrete, should immediately use wood trowel compaction and erased. The surface must not have loose concrete.
3.5 concrete curing: concrete pouring out within 12 h, deal with concrete cover and water conservation. When the room temperature water for at least two times a day, curing time shall not be less than 1 d.
3.6 fill in concrete construction record, making concrete block.
4 quality standards
4.1 ensure project;
4.1 l must conform to the cement, sand, stone, admixture construction standards and the provisions of the relevant standards have the factory certificate, test report.
4.1.2 concrete mix proportion, mixing, maintenance and construction joint treatment, to meet the norms.
4.1.3 of concrete according to the standard of sampling, production, maintenance and testing, evaluation of coagulation on the strength and meets the design requirements.
4.2 the basic items:
Concrete should be vibrating close-grained, honeycomb, holes can not have, cracks, slag inclusion.
4.3 allowable deviation projects, see table 4-31.
Allowable deviation (mm)
Brick mixed multilayer big mold
1 constructional column centerline 10 10
2 the reduction layer mismatch between 8 8
3 level (the height) plus or minus 10 + 10 level or amount of feet
4 section size + 8-5 + 5-2 feet quantity check
Each layer of 10 10 in 2 m line board check
5 verticality under 10 m 15 15
More than 10 m 20 20
6 surface roughness 8 4 in 2 m by feet and wedge feeler check
5 finished product protection
5.1 when pouring concrete, brick wall surface shall not be contaminated water.
5.2 ofnon-vibrating concrete, shall not touch moving steel, built-in parts, and prevents shifting.
5.3 reinforcement on bending, shift or tripping, adjust, repair.
5.4 scattered on the template of concrete should be cleaned in time.
6 should pay attention to quality problems
Concrete material measurement are not allowed to be 6.1: influence of concrete strength, before construction to check, calibration scale, truck weighing, add water must be strictly controlled.
Honeycomb, holes, concrete appearance is 6.2, slag defects such as: concrete vibratory untrue, leakage, lack of protective layer reinforced cushion block, especially within the plate seam reinforcement position, should be carefully check, found that the problem handled in time.
7 quality records
This technology standard should have the following quality records:
7.1 materials (cement, sand, stone, admixture, additive, etc.) factory qualified certificate, test report.
7.2 concrete block test report.
7.3 kinds of construction quality inspection evaluation form.
7.4 inspection and engineering records.
7.5 winter construction records.
7.6 design change records and negotiations.
7.7 other technical documents.
1 scope
This technology standard is suitable for the brick structure, brick mold, plate internal model of the constructional column, ring beam and plate seam concrete pouring process.
2 construction preparation
2.1 material and this machines:
2.1.1 cement: with 325 ~ 425 # slag Portland cement and ordinary Portland cement.
2.1.2 sand: with coarse sand and medium sand, when the concrete is below the C30, silt content is not more than 5%.
2.1.3 stones, constructional column and ring beam with diameter: 0.5 ~ 3.2 cm pebbles or gravel; Joints with particle size of 0.55 ~ 1.2 cm fine stone, when the concrete is below the C30, silt content is not more than 2%.
2.1.4 water: use clean water without impurities.
2.1.5 admixture: according to the requirements of early strength agent, water reducing agent, etc., use mix be determined by the laboratory.
2.2 operation conditions:
Notice of proportion of 2.2.1 confirmed by laboratory concrete mixture ratio, and is consistent with the use of material.
2.2.2 template is firm, stable, elevation, size comply with the design requirements, such as gap in excess of the prescribed template, to plug, and completed preview procedures.
2.2.3 reinforced completed school inspection procedures.
2.2.4 structure to loose concrete and mortar, ring beam if place should be removed and debris to clean up within a template.
2.2.5 under normal temperature, before concrete pouring, brick, wood pattern should right amount water wet in advance, but can not have water.
3 operation process
3.1 process:
Homework to prepare to apply to concrete mixer, concrete transportation to concrete pouring and vibrating, concrete curing
Concrete mixing 3.2:
3.2.1 according to determine the moisture content of sand, stone, adjust the mixing proportion of water consumption, rainy days should be to increase the number determination.
3.2.2 according to blender dosage of every plate of various materials and wagon weight, respectively fixed cement (bulk), sand, stone all scales of scalar. The scale should be check regularly, maintenance, to ensure the accuracy of the measurement. Measuring accuracy: cement and admixture is plus or minus 2%, aggregate is plus or minus 3%, water, admixture is plus or minus 2%. Mixer of concrete panels should be set up.
3.2.3 formal stirring mixer empty before commissioning, normal rear can officially charging mixing.
3.2.4 sand, stone, cement (bulk) must be in strict accordance with the need to use the weighed respectively, add water must also be strict measurement.
3.2.5 loading sequence: pour the stones, pour cement, sand, after finally adding water. Join admixtures when pouring cement. Mineral admixture and water at the same time to join.
3.2.6 coagulation mixing the first set, can be appropriate when charging short-ship some stones or appropriate increase of cement and water.
3.2.7 concrete mixing time, fell 400 l mixer generally should not be less than 1.5 min.
3.2.8 concrete slump, general control in 5 to 7 cm, each affecting measure should be twice.
3.3 concrete transportation:
3.3.1 the concrete mixer after discharge, immediately with skip skip to casting, carts or location. When transporting concrete, should prevent the slurry erosion. If there is segregation phenomenon, should be at the second batch casting location manually.
3.3.2 rainfall distribution on 10-12 concrete with mixer to the duration of the casting, after discharged when for C30 concrete, and the following, shall not be greater than 90 min when temperature above 25 ℃, C30 above shall not be greater than 60 min.
Concrete pouring and vibrating 3.4:
3.4.1 track, constructional column base construction joints should be first before casting shop 5 cm thick with cement mortar or concrete mixture ratio of the same stone concrete.
3.4.2 casting method: using cranes skip feeding, should first will skip down to 50 ~ 60 cm away from the iron plate, cast concrete on the iron plate, and then into a mould with a spade, don't skip directly to the concrete application of discharging into the mould.
Rule 3.4.3 concrete constructional column, the first will be the root of the vibrating rod inserted into the column bottom, make its vibration impregnated with concrete, should stratified pouring, vibrating, each layer thickness less than 60 cm, blanking and vibrating, general casting height should not be greater than 2 m, if you can ensure the casting is close-grained, each layer of a casting.
3.4.4 concrete vibratory: when vibrating constructional column, vibrating stick close to wall insert. Ofnon-vibrating concrete ring beam, the vibration rods and concrete surface should be bevel, oblique vibrating. Vibrating plate joint of concrete, should choose phi 30 mm small vibrating rod. Vibrating thickness should not be more than 1.25 times of vibrating rod.
3.4.5 pouring concrete, attention should be paid to protect reinforced location and waterproof structure, brick wall, cladding outside not to damage it, check whether template, steel bar deformation, displacement; Bolts, rod is loose, fall off; Find the phenomenon such as leak slurry, appoint the overhaul.
3.4.6 surface flattening, ring beam, for every completed a vibrating plate seam concrete, should immediately use wood trowel compaction and erased. The surface must not have loose concrete.
3.5 concrete curing: concrete pouring out within 12 h, deal with concrete cover and water conservation. When the room temperature water for at least two times a day, curing time shall not be less than 1 d.
3.6 fill in concrete construction record, making concrete block.
4 quality standards
4.1 ensure project;
4.1 l must conform to the cement, sand, stone, admixture construction standards and the provisions of the relevant standards have the factory certificate, test report.
4.1.2 concrete mix proportion, mixing, maintenance and construction joint treatment, to meet the norms.
4.1.3 of concrete according to the standard of sampling, production, maintenance and testing, evaluation of coagulation on the strength and meets the design requirements.
4.2 the basic items:
Concrete should be vibrating close-grained, honeycomb, holes can not have, cracks, slag inclusion.
4.3 allowable deviation projects, see table 4-31.
Allowable deviation (mm)
Brick mixed multilayer big mold
1 constructional column centerline 10 10
2 the reduction layer mismatch between 8 8
3 level (the height) plus or minus 10 + 10 level or amount of feet
4 section size + 8-5 + 5-2 feet quantity check
Each layer of 10 10 in 2 m line board check
5 verticality under 10 m 15 15
More than 10 m 20 20
6 surface roughness 8 4 in 2 m by feet and wedge feeler check
5 finished product protection
5.1 when pouring concrete, brick wall surface shall not be contaminated water.
5.2 ofnon-vibrating concrete, shall not touch moving steel, built-in parts, and prevents shifting.
5.3 reinforcement on bending, shift or tripping, adjust, repair.
5.4 scattered on the template of concrete should be cleaned in time.
6 should pay attention to quality problems
Concrete material measurement are not allowed to be 6.1: influence of concrete strength, before construction to check, calibration scale, truck weighing, add water must be strictly controlled.
Honeycomb, holes, concrete appearance is 6.2, slag defects such as: concrete vibratory untrue, leakage, lack of protective layer reinforced cushion block, especially within the plate seam reinforcement position, should be carefully check, found that the problem handled in time.
7 quality records
This technology standard should have the following quality records:
7.1 materials (cement, sand, stone, admixture, additive, etc.) factory qualified certificate, test report.
7.2 concrete block test report.
7.3 kinds of construction quality inspection evaluation form.
7.4 inspection and engineering records.
7.5 winter construction records.
7.6 design change records and negotiations.
7.7 other technical documents.
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