This specification is formulated to make mechanical spray plastering construction technologically advanced, economically reasonable, safe and applicable, and to ensure quality. This specification is applicable to mechanical spray plastering construction of walls, ceilings, roofs and floors of industrial and civil buildings and general structures. JGJ/T 105-1996 Mechanical spray plastering construction specification JGJ/T105-96 JGJ/T105-1996 Standard download decompression password: www.bzxz.net

Engineering Construction Standard Full-text Information System
Industry Standard of the People's Republic of China
Mechanical Spray Plastering Construction Specification
The Rule for Mechanized Morterbzxz.net
Spray and Plane Construction
JGJ/T105—96
Engineering Construction Standard Full-text Information System
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Industry Standard of the People's Republic of China
Mechanical Spray Plastering Construction Specification
The Rule for Mechanized Morter
Spray and Plane Construction
JGJ/T105—96 5—96
Editor: Institute of Building Mechanization, China Academy of Building ResearchApproval: Ministry of Construction of the People's Republic of ChinaEffective Date: February
1997
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Notice on the Release of Industry Standard
"Mechanical Spray Plastering Construction Code"Construction Standard [1996] No. 408
Construction Committees (Construction Departments) of Provinces, Autonomous Regions, and Municipalities Directly under the Central Government, and Construction Committees of Cities with Independent Planning List: According to the requirements of the Ministry of Construction's Document No. Jianbiao [1993] 285, the "Mechanical Spray Plastering Construction Code" edited by China Academy of Building Research has been reviewed and approved as an industry standard, numbered JGJ/T105—96, and will be implemented from February 1, 1997. China Academy of Building Research, the Ministry of Construction's building engineering standards and technical management unit, is responsible for the unified management and specific interpretation of this code. This code is published by the Standard and Norm Research Institute of the Ministry of Construction. Ministry of Construction of the People's Republic of China
July 12, 1996
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
1 General
2 Mechanical Equipment
2.1 Equipment Selection and Configuration
2.2 Equipment Installation and Use
2.3 Equipment Repair and Maintenance
24 Pipeline..
3 Protection of Completed Projects and Facilities
3.1 Protective Measures Before Spraying 3.2 Protection during spraying 4 Mortar preparation 4.1 Material requirements 4.3 Mortar mixing 5 Spraying process Construction preparation Smoothing and calendering Quality inspection and acceptance Quality requirements Inspection and acceptance Winter plastering General provisions Mechanical equipment Engineering construction standard full text Information system
W.3
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7.4 Construction
8 Safety construction
General provisions…
Spraying operation·
Mechanical operation………
Appendix A
Appendix B
Appendix C
Appendix D
Appendix E
Appendix F
Main technical performance of mortar combined machine and mortar pump 15
Mortar combined machine Common faults and troubleshooting methods...21
Mortar mix ratio for mechanical spray plastering
Construction process flow of mechanical spray plastering
Spraying distance, angle and air volume
Terms used in this code
Additional instructions
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1.0.1 This code is formulated to make mechanical spray plastering construction technologically advanced, economically reasonable, safe and applicable, and to ensure quality.
2 This code is applicable to mechanical spray plastering construction of walls, ceilings, roofs and floors of industrial and civil houses and general structures. 1.0.3 In addition to complying with this code, mechanical spray plastering construction shall also comply with the relevant provisions of the current national standards, specifications and regulations. Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
2 Mechanical Equipment
2.1 Equipment Selection and Configuration
2.1.1 The selection of spraying equipment and its supporting equipment shall be determined according to the requirements of the construction organization design and the provisions of this specification.
2.1.2 The spraying equipment shall consist of a mortar mixer, a vibrating screen, a mortar pump, an air compressor or a mortar joint machine, a conveying pipeline assembly and a spray gun. 2.1.3 The mortar mixer shall be a forced mortar mixer, and its capacity shall not be less than 0.3m3
2.1.4 The vibrating screen shall be a flat vibrating screen or an eccentric rod vibrating screen, and the two can also be used in parallel. The mesh aperture shall be 1012.5mm. 2.1.5 The selection of spraying equipment shall be determined according to the pumping height and conveying volume, and a double-cylinder piston mortar joint machine shall be selected. Its main technical performance can be selected according to Appendix A. 2.1.6 The capacity of the air compressor should be 300L/min, and its working pressure should be 0.5MPa.
2.1.7 The delivery pipeline assembly should consist of a slurry delivery pipe, an air delivery pipe and a self-locking quick connector. The diameter of the slurry delivery pipe should be 50mm, and its working pressure should be 4-6MPa; the diameter of the air delivery pipe should be 13mm.
2.1.8 The spray gun type and the matching nozzle type and caliber should be selected according to the location, material and decoration requirements of the project. For spraying of internal and external walls, ceiling surfaces, mortar cushions, and ground layers, standard and angle spray guns with calibers of 18 and 20mm should be selected; for decorative spraying, decorative spray guns with calibers of 10, 12 and 14mm should be selected. 2.1.9 When transporting mortar over long distances or spraying at high places, communication equipment such as wireless intercoms should be available.
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2.2 Equipment Installation and Use
2.2.1 The layout of the equipment should be reasonably determined according to the general construction plan. The conveying radius of raw materials and mortar should be shortened, and the number of equipment movements should be reduced. 2.2.2 The installation of the mortar mixer and the flat vibrating screen should be firm, the operation should be convenient, and the loading and unloading should be unobstructed.
2.2.3 The site for installing the mortar joint machine should be solid and flat, and it should be placed on the cement floor. The wheels should be wedged firmly and placed stably. 2.2.4 The mortar joint machine should be installed at the bottom of the mortar mixer and the vibrating screen, and its feed port should be placed below the discharge port of the mortar mixer and connected to each other. The discharge height should be 350-400mm.
2.2.5 The spraying should adopt a double air valve control switch, which should be debugged after installation, easy to open and close, and reliable in remote control performance.
2.2.6 The spraying equipment should be operated and managed by a dedicated person, with clear responsibilities, and should work closely with the spraying operators to meet the construction requirements. 2.2.7 The spraying equipment should be tested with no load before formal operation, and its continuous no-load operation time should be 5 minutes. The direction of motor rotation, various working systems and safety devices should be checked, and their operation should be normal and reliable.
2.2.8 When the spraying equipment is working, the pressure change of the slurry pump should be observed frequently. When the gauge pressure exceeds the maximum pressure value, the reflux unloading valve should be opened immediately to release the pressure, and the machine should be stopped for inspection. Common faults and troubleshooting methods of mortar combined machine are shown in Appendix B. 2.2.9 According to the amount of plastering work and the working height, the pumping speed can be changed to select the appropriate mortar delivery volume. When the mortar delivery volume is large, the high speed gear can be selected. For mortar with high pumping pressure or difficult to deliver, the low speed gear can be selected: Under normal circumstances, the medium speed gear is selected. 2.2.10 When spraying mortars of different materials or different consistencies, the position of the air nozzle, the opening amount of the double air valve and the air flow rate should be adjusted to make the mortar spray speed uniform, firmly bonded to the base layer and reduce rebound dust.
2.3 Equipment repair and maintenance
2.3.1 After the spraying equipment is finished, it should be cleaned in time, and maintenance, maintenance and engineering construction standard full text information system
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repair work should be done to keep the equipment in good condition. 2.3.2 Daily maintenance of the equipment should add lubricating oil according to its use requirements, keep the piston pump oil pipe unobstructed, and check the sealing of the overload safety valve and the disassembly and assembly. 2.3.3 After one week or 50 hours of operation, check the pump body, cylinder, and leather cup of the mortar joint machine to ensure that they are in good condition, the tightness of the transmission belt, the firmness and sealing of the pipe joints, clean the pump surface, and apply thin engine oil to prevent dirt from sticking. 2.3.4 The clutch, reflux unloading valve, reducer, air compressor and other major components should be regularly inspected according to their use requirements. If there is wear or damage, they should be adjusted and replaced in time. 2.3.5 Before refueling the mortar mixer and mortar combined machine, the dirt on the oil filling nozzle and oil hole should be wiped clean.
2.4 Pipeline
2.4.1 The slurry delivery pipe should be strong and wear-resistant, safe and reliable, and should not be damaged or broken during pressure delivery. Pressure-resistant and wear-resistant rubber pipes should be used for horizontal slurry delivery pipes: pressure-resistant and wear-resistant rubber pipes or steel pipes can be used for vertical slurry delivery pipes.
2.4.2 The layout and installation of the slurry delivery pipe should be smooth and straight, without bending, winding and pressure. The connection of the slurry delivery pipe should be locked and fastened with a self-locking quick connector, and the locking rod should be tied with wire. The connection of the pipe should be sealed and no slurry should leak or drip. When laying the slurry delivery pipe, it should be conducive to parallel cross-flow operation and reduce the number of times the pipe is disassembled during construction. 2.4.3 When the horizontal slurry delivery pipe is too long, the pipe should be laid with a certain upward slope. The vertical slurry delivery pipe must be firmly fixed on the wall or scaffolding. The connection between the horizontal slurry delivery pipe and the vertical slurry delivery pipe should be no less than 90°, and the radius of the bend should not be less than 1.2m. 2.4.4 When the delivery pipe is a steel pipe, its inner wall should be kept clean and free of adhesive. The two ends of the steel pipe should be firmly connected to the rubber pipe, and the seal should be reliable without leakage. 2.4.5 When spraying, the bending radius of the drag pipe should not be less than 1.2m. The outlet of the slurry delivery pipe shall not be inserted into the mortar.
2.4.6 A soft rubber air pipe should be selected for the air pipe, and the connection position between the air pipe and the spray gun should be correct, sealed, and leak-proof.
2.4.7 The air pipeline should be unobstructed, and the double air valve on the air pipe should have good sealing without leakage.
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3 Protection of Completed Projects and Facilities
3.1 Protective Measures Before Spraying
3.1.1 In order to prevent the pollution and damage of the completed projects during the spraying and plastering process, materials should be used to block and wrap. The tools and equipment used should not collide with the protective facilities. 3.1.2 Steel and wooden door and window frames should be shielded to prevent spraying and sticking mortar. 3.1.3 Doors and windows made of aluminum alloy, plastic, and colored galvanized steel plates should be protected by plastic tape. 3.1.4 Various pipes such as water supply and drainage, heating, and gas should be wrapped and protected with plastic sheets and other materials. Dense pipes should be installed after spraying and plastering. 3.1.5 Concealed fireproof boxes, electrical switch boxes and wire boxes, and equipment in place should be covered and protected to prevent sticking mortar.
3.1.6 All kinds of pipes and wire pipes should be kept unobstructed, and the scattered openings should be temporarily closed to prevent the mortar from entering.
3.1.7 The installed stainless steel and copper handrails, plastic handrails, high-grade wooden handrails, etc. should be wrapped with plastic tape or plastic cloth to prevent contamination. 3.1.8 When laying slurry pipes on the finished floor and roof waterproof layer, in order to prevent the joint iron parts from damaging the floor, floor surface and waterproof layer, wooden boards or thick rubber pads should be laid under the joint iron parts. Before spraying the ceiling and wall, the finished floor should be covered with plastic cloth and other materials. When the strength of the cement mortar floor is not high, it should not be covered with sand. When removing the dust on the ground, it should be prevented from damaging the floor surface. Do not use iron tools to hit the floor. 3.1.9 When spraying the leveling layer mortar, the rainwater outlet should be protected in advance to prevent the mortar from clogging the rainwater pipe.
Floor drains and reserved holes should be sealed in advance to prevent mortar from entering, and marked 3.1.10
For deformation joints on the floor, wall, and ceiling, wooden boards and other materials should be used to protect the deformation joints before spraying to prevent mortar from being sprayed into the joints. 3.2 Protection during spraying
3.2.1 When laying and moving the slurry pipe, the plastering of the positive corners of the wall, column, door and window should be protected to prevent damage.
3.2.2 The location of the sleeves of the heating, hot water pipes and other pipes through the wall and floor should meet the design requirements and prevent mortar from blocking the pipes. 3.2.3 The installed non-metallic pipes, socket pipes, suspended pipes and concealed pipes laid on the floor shall not be collided, dislocated or damaged. 3.2.4 The embedded parts of exposed equipment should be clearly marked when spraying to facilitate the subsequent construction process.
3.2.5 When spraying the ground, protective measures such as shielding should be adopted for the cement skirting boards and wall skirts that have been made.
3.2.6 When spraying on the loose insulation layer, in order to ensure the uniform thickness of the insulation layer, a wooden pad should be placed under the slurry pipe to prevent the slurry pipe from being pulled directly on the insulation layer. 3.2.7 When applying a plastering protective layer on the waterproof layer, the iron parts of the slurry pipe joints should be prevented from scratching the waterproof layer; the outlet on the exhaust pipe should be temporarily closed to avoid mortar blockage, and the exhaust pipe should not be collided or damaged.
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Mortar Preparation
4.1 Material Requirements
4.1.1 The selection of material varieties and specifications shall comply with the design requirements and current material standards. 4.1.2 Portland cement, ordinary Portland cement and slag Portland cement shall be used, and the grade shall not be less than 325. Expired or damp cement shall not be used. 4.1.3 Sand shall be clean and free of impurities, and the mud content shall be less than 3%. Medium sand shall be used and must be sieved before use. The maximum particle size of sand: when used for the base layer, it shall not be greater than 2.5mm; when used for the surface layer, it shall not be greater than 1.2mm. Extra fine sand shall not be used. 4.1.4 Lime paste shall be fine and white, and shall not contain unripened particles and impurities. Dry, weathered and frozen lime paste shall not be used. When lime paste is made by pouring block quicklime, it should be filtered with a sieve with a pore size of no more than 3mm×3mm. The lime aging time should not be less than 15d at room temperature. When used for surface plastering, the aging period should not be less than 30d. When using ground lime powder instead of lime paste, decorative lime powder should be used, and its fineness should pass through a sieve with 4900 holes/cm2; the aging time should not be less than 3d. 4.1.5 When adding fly ash, its technical indicators should meet the requirements of Class III ash in the current national standard "Technical Regulations for the Application of Fly Ash in Concrete and Mortar" JGJ28-86. 4.1.6 The admixtures added to mortar should have product certificates and should comply with the provisions of the relevant current admixture standards.
4.1.7 Drinking water should be used for mortar mixing. When other water sources are used, the water quality should meet the provisions of the current national standard "Standard for Water for Concrete Mixing" JGJ63-89. 4.1.8 When spraying white lime mortar, the hemp used should be tough, dry and free of impurities. It should be evenly fluffed before use, and its fiber length should not exceed 30mm. When using paper fiber ash, the paper fiber should be soaked, pounded, clean and especially rotten; the surface paper fiber should be machine-milled. Engineering Construction Standard Full Text Information System
W.bzsosO.coI 74 For various pipes such as water supply and drainage, heating, and gas, plastic sheets and other materials should be used for protection. Dense pipes should be installed after spraying and plastering. 3.1.5 Concealed fireproof boxes, electrical switch boxes, and wire boxes, and equipment in place should be covered and protected to prevent mortar from sticking.
3.1.6 Various pipes and wire tubes should be kept unobstructed, and the loose openings should be temporarily closed to prevent mortar from entering.
3.1.7 Installed stainless steel and copper handrails, plastic handrails, high-grade wooden handrails, etc. should be wrapped and protected with plastic tape or plastic sheets to prevent sticking. 3.1.8 When laying slurry pipes on the finished floor and roof waterproof layers, in order to prevent the joint iron parts from damaging the floor and ground surface and waterproof layers, wooden boards or thick rubber pads should be laid under the joint iron parts. Before spraying the ceiling and walls, the finished floor should be covered with plastic sheets and other materials. When the strength of cement mortar floor is not high, sand should not be used to cover it. When removing the dust on the floor, damage to the floor surface should be avoided. Iron tools should not be used to hit the floor. 3.1.9 When spraying the leveling layer mortar, the rainwater outlet should be protected in advance to prevent the mortar from clogging the rainwater pipe.
The floor drain and reserved holes should be sealed in advance to prevent the mortar from entering, and marked 3.1.10
The deformation joints on the floor, wall and ceiling should be protected with wooden boards and other materials before spraying to prevent the mortar from being sprayed into the joints. 3.2 Protection during spraying
3.2.1 When the mortar delivery pipe is laid and moved, the plastering of the positive corners of the wall, column, door and window should be protected to prevent damage.
3.2.2 The location of the sleeves of heating, hot water pipes and other pipes through the wall and floor shall meet the design requirements and prevent mortar from blocking the pipes. 3.2.3 Installed non-metallic pipes, socket pipes, suspended pipes and concealed pipes laid on the floor shall not be collided, dislocated or damaged. 3.2.4 The embedded parts of exposed equipment shall be clearly marked when spraying to facilitate the construction of subsequent processes.
3.2.5 When spraying the ground, protective measures such as shielding shall be adopted for the finished cement skirting boards and wall skirts.
3.2.6 When spraying on the loose insulation layer, in order to ensure the uniform thickness of the insulation layer, wooden pads shall be placed under the slurry pipe to prevent the slurry pipe from being pulled directly on the insulation layer. 3.2.7 When applying the protective plastering layer on the waterproof layer, the iron parts of the slurry pipe joints should be prevented from scratching the waterproof layer; the outlet of the exhaust pipe should be temporarily closed to avoid mortar blockage, and the exhaust pipe should not be collided or damaged.
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Mortar Preparation
4.1 Material Requirements
4.1.1 The selection of material varieties and specifications should comply with the design requirements and current material standards. 4.1.2 Cement should preferably be silicate cement, ordinary silicate cement and slag silicate cement, and its grade should not be less than 325. Expired or damp cement shall not be used. 4.1.3 Sand should be clean and free of impurities, and the mud content should be less than 3%. Medium sand should be used and must be sieved before use. Maximum particle size of sand: when used for base ash, it should be no larger than 2.5mm; when used for surface layer, it should be no larger than 1.2mm. Extra fine sand shall not be used. 4.1.4 Lime paste shall be fine and white, and shall not contain unripened particles and impurities. Dry, weathered, and frozen lime paste shall not be used. When lime paste is made by pouring block quicklime, it shall be filtered by a sieve with a pore size of no more than 3mm×3mm. The aging time of lime shall not be less than 15d at room temperature. When used for surface plastering, the aging period shall not be less than 30d. When using ground lime powder instead of lime paste, decoration lime powder shall be used, and its fineness shall pass through a sieve with 4900 holes/cm2; the aging time shall not be less than 3d. 4.1.5 When fly ash is added, its technical indicators shall meet the requirements of Grade III ash in the current national standard "Technical Code for the Application of Fly Ash in Concrete and Mortar" JGJ28-86. 4.1.6 The admixtures used in mortar should have product certificates and comply with the provisions of the current admixture standards.
4.1.7 Drinking water should be used for mortar mixing. When other water sources are used, the water quality should comply with the provisions of the current national standard "Standard for Water for Concrete Mixing" JGJ63-89. 4.1.8 When spraying white lime mortar, the hemp used should be tough, dry and free of impurities. It should be evenly loosened before use, and its fiber length should not exceed 30mm. When using paper fiber ash, the paper fiber should be soaked, pounded, clean, and especially rotten; the surface paper fiber should be machine-milled. Engineering Construction Standard Full Text Information System
W.bzsosO.coI 74 For various pipes such as water supply and drainage, heating, and gas, plastic sheets and other materials should be used for protection. Dense pipes should be installed after spraying and plastering. 3.1.5 Concealed fireproof boxes, electrical switch boxes, and wire boxes, and equipment in place should be covered and protected to prevent mortar from sticking.
3.1.6 Various pipes and wire tubes should be kept unobstructed, and the loose openings should be temporarily closed to prevent mortar from entering.
3.1.7 Installed stainless steel and copper handrails, plastic handrails, high-grade wooden handrails, etc. should be wrapped and protected with plastic tape or plastic sheets to prevent sticking. 3.1.8 When laying slurry pipes on the finished floor and roof waterproof layers, in order to prevent the joint iron parts from damaging the floor and ground surface and waterproof layers, wooden boards or thick rubber pads should be laid under the joint iron parts. Before spraying the ceiling and walls, the finished floor should be covered with plastic sheets and other materials. When the strength of cement mortar floor is not high, sand should not be used to cover it. When removing the dust on the floor, damage to the floor surface should be avoided. Iron tools should not be used to hit the floor. 3.1.9 When spraying the leveling layer mortar, the rainwater outlet should be protected in advance to prevent the mortar from clogging the rainwater pipe.
The floor drain and reserved holes should be sealed in advance to prevent the mortar from entering, and marked 3.1.10
The deformation joints on the floor, wall and ceiling should be protected with wooden boards and other materials before spraying to prevent the mortar from being sprayed into the joints. 3.2 Protection during spraying
3.2.1 When the mortar delivery pipe is laid and moved, the plastering of the positive corners of the wall, column, door and window should be protected to prevent damage.
3.2.2 The location of the sleeves of heating, hot water pipes and other pipes through the wall and floor shall meet the design requirements and prevent mortar from blocking the pipes. 3.2.3 Installed non-metallic pipes, socket pipes, suspended pipes and concealed pipes laid on the floor shall not be collided, dislocated or damaged. 3.2.4 The embedded parts of exposed equipment shall be clearly marked when spraying to facilitate the construction of subsequent processes.
3.2.5 When spraying the ground, protective measures such as shielding shall be adopted for the finished cement skirting boards and wall skirts.
3.2.6 When spraying on the loose insulation layer, in order to ensure the uniform thickness of the insulation layer, wooden pads shall be placed under the slurry pipe to prevent the slurry pipe from being pulled directly on the insulation layer. 3.2.7 When applying the protective plastering layer on the waterproof layer, the iron parts of the slurry pipe joints should be prevented from scratching the waterproof layer; the outlet of the exhaust pipe should be temporarily closed to avoid mortar blockage, and the exhaust pipe should not be collided or damaged.
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Mortar Preparation
4.1 Material Requirements
4.1.1 The selection of material varieties and specifications should comply with the design requirements and current material standards. 4.1.2 Cement should preferably be silicate cement, ordinary silicate cement and slag silicate cement, and its grade should not be less than 325. Expired or damp cement shall not be used. 4.1.3 Sand should be clean and free of impurities, and the mud content should be less than 3%. Medium sand should be used and must be sieved before use. Maximum particle size of sand: when used for base ash, it should be no larger than 2.5mm; when used for surface layer, it should be no larger than 1.2mm. Extra fine sand shall not be used. 4.1.4 Lime paste shall be fine and white, and shall not contain unripened particles and impurities. Dry, weathered, and frozen lime paste shall not be used. When lime paste is made by pouring block quicklime, it shall be filtered by a sieve with a pore size of no more than 3mm×3mm. The aging time of lime shall not be less than 15d at room temperature. When used for surface plastering, the aging period shall not be less than 30d. When using ground lime powder instead of lime paste, decoration lime powder shall be used, and its fineness shall pass through a sieve with 4900 holes/cm2; the aging time shall not be less than 3d. 4.1.5 When fly ash is added, its technical indicators shall meet the requirements of Grade III ash in the current national standard "Technical Code for the Application of Fly Ash in Concrete and Mortar" JGJ28-86. 4.1.6 The admixtures used in mortar should have product certificates and comply with the provisions of the current admixture standards.
4.1.7 Drinking water should be used for mortar mixing. When other water sources are used, the water quality should comply with the provisions of the current national standard "Standard for Water for Concrete Mixing" JGJ63-89. 4.1.8 When spraying white lime mortar, the hemp used should be tough, dry and free of impurities. It should be evenly loosened before use, and its fiber length should not exceed 30mm. When using paper fiber ash, the paper fiber should be soaked, pounded, clean, and especially rotten; the surface paper fiber should be machine-milled. Engineering Construction Standard Full Text Information System
W.bzsosO.coI 78 When spraying white lime mortar, the hemp used should be tough, dry and free of impurities. It should be evenly fluffed before use, and its fiber length should not exceed 30mm. When using paper tendon ash, the paper tendons should be soaked, pounded, clean and especially rotten; the surface paper tendons should be machine-milled. Engineering Construction Standard Full Text Information System
W.bzsosO.coI 78 When spraying white lime mortar, the hemp used should be tough, dry and free of impurities. It should be evenly fluffed before use, and its fiber length should not exceed 30mm. When using paper tendon ash, the paper tendons should be soaked, pounded, clean and especially rotten; the surface paper tendons should be machine-milled. Engineering Construction Standard Full Text Information System
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