CN103159441B - Reinforcing bar grouting transom sealing material and its preparation method and application - Google Patents

Reinforcing bar grouting transom sealing material and its preparation method and application Download PDF

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Publication number
CN103159441B
CN103159441B CN201310062284.2A CN201310062284A CN103159441B CN 103159441 B CN103159441 B CN 103159441B CN 201310062284 A CN201310062284 A CN 201310062284A CN 103159441 B CN103159441 B CN 103159441B
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sealing
powder
cement
agent
reinforcing bar
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CN201310062284.2A
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CN103159441A (en
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杨钱荣
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同济大学
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The present invention relates to reinforcing bar grouting transom sealing material and its preparation method and application, prepared by the raw material of following component and weight part content: cement 100, active admixture 0-80, water reducer 0.01-10, hardening accelerator 0.01-10, swelling agent 0.01-30, binding agent 0-30, plasticity-retention agent 0.01-50, starch ethers 0.01-10, powder filler 0-100, quartz sand 10-300, preparing sealing material by being uniformly mixed, may be used for the encapsulation process before reinforcing bar grouting connection.Compared with prior art, the present invention has good plasticity, adhesive power and anti-pendant slip, slurry and does not shrink, overcome with conventional cement mortar sealing easily produce cracking, seep water, the shortcoming such as come off.Sealing material has excellent workability, is applicable to caulking gun or electronic caulking machine crushing failure at high speed, injects construction, after adopting the present invention to carry out encapsulation process, can carry out bar connecting grouting construction, can increase substantially operating efficiency after 1 day.

Description

Reinforcing bar grouting transom sealing material and its preparation method and application
Technical field
The invention belongs to material of construction and technical field of building construction, especially relate to a kind of reinforcing bar grouting transom sealing material and its preparation method and application.
Background technology
Building industrialization is the inevitable development trend of construction industry.Assembled architecture is fast with construction speed, and climate conditionality is little, saves labor force and can improve the principal mode that the plurality of advantages such as construction quality also will become architectural design and construction in the near future.The structure of assembly concrete mainly adopts prefabricated components, prefabricated components bar connecting is one of gordian technique of assembled architecture design and construction, in traditional cast-in-place concrete structure, the connection of reinforcing bar adopts overlap joint to connect more, be welded to connect or the mechanical joining methods such as compression sleeve, the construction of bar connecting is comparatively complicated, and the connection of reinforcing bar must be completed before deposit concrete, can not fabricated construction be carried out.The connection of reserved steel bar in the prefabricated engineering method of developed country, general normal use reinforced bar sleeve and strength cement-based grouting material are as jointing; And at home, adopt grouting connecting reinforcement technology to be still in the exploratory stage.For the steel bushing grouting in vertical connecting direction component (wall or post) conventional be a sizing process, when prefabricated panel and post are installed, it is padded that pad is placed in below, reserve 20-40mm overhead height and be used as seat pulp layer, envelope mould process for seat slurry is a difficult point technically, current existing method: vertically member lower surrounding pastes rubber water-proof bar in advance, after lifting, due to the extruding of reinforcement member, India-rubber strip forms sealing-ring, one deck seal gum is stamped again outside sealing rod, this kind of method is adopted not only to construct loaded down with trivial details, and be easy to be shifted because of extruding at hoisting process India-rubber strip, plugging effect is very undesirable, and special sealing rod and the main dependence on import of seal gum, expensive.In addition, also have and adopt conventional cement mortar outside vertical member, to carry out shutoff process, a pulp layer space is entered owing to not allowing mortar, general employing dry sand-cement slurry, intensity due to conventional cement mortar is low and development is slow, cohesive force is also poor, and be difficult to form effective shutoff, when being in the milk, slightly running pulp phenomenon very easily occurs pressure, likely cause be in the milk connection failure, component of reinforcing bar to be scrapped, cause very large financial loss.
For assembled architecture reinforcing bar grouting connection construction present situation, research and develop a kind of excellent property, easy construction, reasonable price be suitable for grouting connection construction sealing material and construction technology be problem urgently to be resolved hurrily at present.
Summary of the invention
Object of the present invention is exactly provide a kind of reinforcing bar grouting transom sealing material with good plasticity, adhesive power and anti-pendant slip and its preparation method and application to overcome defect that above-mentioned prior art exists.
Object of the present invention can be achieved through the following technical solutions:
Reinforcing bar grouting transom sealing material, is prepared by the raw material of following component and weight part content:
Cement 100, active admixture 0-80, water reducer 0.01-10, hardening accelerator 0.01-10, swelling agent 0.01-30, binding agent 0-30, plasticity-retention agent 0.01-50, starch ethers 0.01-10, powder filler 0-100, quartz sand 10-300.
The preferred following component of raw material of sealing material and weight part content:
Cement 100, active admixture 20-60, water reducer 0.1-5, hardening accelerator 0.1-5, swelling agent 5-20, binding agent 5-20, plasticity-retention agent 0.1-20, starch ethers 0.05-5, powder filler 30-80, quartz sand 50-200.
As preferred embodiment, cement is selected from silicate cement, slag cement, trass cement, pulverized fuel ash cement, one or more in aluminosulfate cement or aluminate cement.
As preferred embodiment, active admixture is selected from one or more in flyash, slag powders, silicon ash or colliery powder.
As preferred embodiment, water reducer is selected from one or more in Beta-methyl naphthalene sulphonate (naphthalene water reducer), melamino-formaldehyde polycondensate, polycarboxylate dehydragent and sulfonated lignin.
As preferred embodiment, hardening accelerator is selected from one or more in sodium sulfate, water glass, Quilonum Retard, sodium carbonate, calcium chloride or calcium formiate.
As preferred embodiment, swelling agent is ettringite or calcium oxide expansion agents.
As preferred embodiment, binding agent is pva powder, polymer emulsion or redispersable latex powder.
As the embodiment be more preferably, polymer emulsion is selected from one or more in EVA emulsion, vinyl acetate emulsion, pure-acrylic emulsion, benzene emulsion, styrene-butadiene emulsion, the equal emulsion of vinegar;
As the embodiment be more preferably, redispersable latex powder is selected from the multipolymer of ethylene/vinyl acetate, ethene and vinylchlorid and vinyl laurate terpolymer rubber powder, vinyl acetate and ethene and higher aliphatic vinyl acetate terpolymer rubber powder, vinyl acetate and higher aliphatic vinyl acetate copolymerization rubber powder, acrylate and styrene copolymerized rubber powder, vinyl acetate and acrylate and higher aliphatic vinyl acetate terpolymer rubber powder, one or more in vinyl acetate homopolymerization rubber powder or vinylbenzene and butadiene copolymer rubber powder.
As preferred embodiment, plasticity-retention agent is selected from one or more in wilkinite, diatomite, methylcellulose gum (HPMC), methyl hydroxyethylcellulose ether (MHPC), methylhydroxypropylcellulose ether (MHPC), hydroxyethyl ether cellulose (HEC), carboxymethyl cellulose (CMC) and lignin fibre.
As preferred embodiment, starch ethers is common starch ether or treated starch ether.
As preferred embodiment, powder filler is one or more in silica powder, Paris white, sierozem power, potter's clay, talcum powder or mica powder.
As preferred embodiment, quartz sand is grating artificial sand or natural sand.
Binding agent for use is pva powder or redispersable latex powder, reinforcing bar grouting transom sealing material is when preparing, first raw material is taken by formula, quartz sand, powder filler, cement, active admixture, water reducer, hardening accelerator, swelling agent, binding agent, plasticity-retention agent, starch ethers is added successively in stirrer, stir, prepare single component powdery sealing material.
Binding agent for use is polymer emulsion, reinforcing bar grouting transom sealing material is when preparing, raw material is taken by formula, quartz sand, powder filler, cement, active admixture, water reducer, hardening accelerator, swelling agent, plasticity-retention agent, starch ethers is added successively in stirrer, stir and obtain dry powder, add the binding agent of liquid more in proportion, prepare the two-pack sealing material of liquid.
The application of reinforcing bar grouting transom sealing material, sealing material be applicable to carry out bar connecting grouting or other connect for reinforcing bar grouting before encapsulation process, be also applicable to the encapsulation process of other cement based sealing material, comprise the following steps:
(1) before sealing 6 ~ 12 hours, to sprinkle water surface of base fully, comprehensively moistening.Seal first 1 hour, blow off with pressurized air and swim, also with things such as cotton, staple, sponges, water can be wiped, blot only.
(2) by ratio requirement, take sealing material and water respectively, the water yield added is the 12-20% of sealing material weight, cement based sealing material is put into agitation vat and is added water (two component sealing material also must add liquid-containing binder), handheld stirring machine is adopted to stir 3-5 minute, obtained uniform seal sand slurry slurry.
(3) for improving cohesive force, within the scope of the 20mm of sideline, criticizing one deck 2-3mm seal sand slurry with little scraper make interface processing in post, body of wall lower end surrounding.
(4) special caulking gun head is inserted in sealing material, by pull of vacuum, sealing material is sucked in caulking gun, also can directly sealing material be poured in special electric caulking machine stand-by.Caulking gun is handle type manual compression filling gun, and caulking machine is the special electric screw rod conveyor with feed bin.
(5) sliding for preventing seal sand slurry from falling, in post, wall bottom shelf dead level, put into a L-type steel bar (also can substitute with moulding rod or batten), the long limit of steel bar is used as the backer of seal sand slurry, and length is advisable with 10-50cm, minor face is used as the handle of movement, and length is advisable with 5-20cm.The height of the L-type steel bar put into is slightly less than Stilt layer, and be advisable can freely fill in, the long limit of steel bar is parallel to post, wall base, apart from post, wall outer side about 20mm outside steel bar.
(6) start electronic caulking machine or manually promote caulking gun handle, evenly extrude sealing material pointing as stressing and enter Stilt layer, in Stilt layer, inject seal sand slurry toward opposite side from side along pillar, wall outer side lower end frame dead level, and strike off mortar with spatula.If do not adopt caulking gun or caulking machine, also with spatula, seal sand slurry can be pressed in space.
(7) partially sealed complete after, gently twitch steel bar move along post, wall base to the other end, repeating step (5), (6), until post, wall the other end Stilt layer are also sealed, pinch steel bar minor face rotational angle and extract out gently.
(8) sealing of inspection post, wall surrounding, locally falls sliding phenomenon if find that there is or hole should be repaired by timely seal sand slurry.
Count when self-watering stirs, encapsulation process should complete in 40 minutes.
After encapsulation process completes, 12 hours summers, 24 hours winters, bar connecting grouting treatment can be carried out.
Compared with prior art, the present invention has the following advantages:
(1) adjustment time of coagulation can be carried out according to requirement of engineering: early strength is high, later strength continues to increase.After adopting this material seal process, can bar connecting grouting construction be carried out after 1 day, can operating efficiency be increased substantially.
(2) this material fresh paste has good plasticity, adhesive power and anti-pendant slip, can not subside and cause grouting running pulp phenomenon.
(3) this material slurry does not shrink, and non-deformability is strong.Overcome with conventional cement mortar sealing easily produce cracking, seep water, the shortcoming such as come off.
(4) this material has good workability, easy and simple to handle, and operable time is long.The stirring that adds water of this material can use, and can adopt caulking gun or caulking machine injection fillers gap, and construction rapidly and efficiently.
(5) this material is major gelled material with cement, make use of a large amount of industrial residue as complementary gelling material, has obvious cost advantage compared with macromolecule product.
(6) high molecule sealing materials is overcome not ageing-resistant, the shortcoming of single component glue package stability difference.
(7) this material is not containing hazardous solvent, radioactive substance, harmless, free from environmental pollution, belongs to ep-type material.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
Reinforcing bar grouting transom sealing material, is prepared by the raw material of following component and weight part content:
Cement 100, active admixture 0-80, water reducer 0.01-10, hardening accelerator 0.01-10, swelling agent 0.01-30, binding agent 0-30, plasticity-retention agent 0.01-50, starch ethers 0.01-10, powder filler 0-100, quartz sand 10-300.
For the sealing material that can obtain better sealing effectiveness, raw material can also adopt following component and weight part content further:
Cement 100, active admixture 20-60, water reducer 0.1-5, hardening accelerator 0.1-5, swelling agent 5-20, binding agent 5-20, plasticity-retention agent 0.1-20, starch ethers 0.05-5, powder filler 30-80, quartz sand 50-200.
In above-mentioned raw materials, cement is selected from silicate cement, slag cement, trass cement, pulverized fuel ash cement, one or more in aluminosulfate cement or aluminate cement.
Active admixture is selected from one or more in flyash, slag powders, silicon ash or colliery powder.
Water reducer is selected from one or more in Beta-methyl naphthalene sulphonate (naphthalene water reducer), melamino-formaldehyde polycondensate, polycarboxylate dehydragent and sulfonated lignin.
Hardening accelerator is selected from one or more in sodium sulfate, water glass, Quilonum Retard, sodium carbonate, calcium chloride or calcium formiate.
Swelling agent is ettringite or calcium oxide expansion agents.
Binding agent can adopt the binding agent of two kinds of different shapes, is respectively powder binder and liquid adhesive, and wherein, powder binder is pva powder or redispersable latex powder, and liquid adhesive is polymer emulsion.
Redispersable latex powder is selected from the multipolymer of ethylene/vinyl acetate, ethene and vinylchlorid and vinyl laurate terpolymer rubber powder, vinyl acetate and ethene and higher aliphatic vinyl acetate terpolymer rubber powder, vinyl acetate and higher aliphatic vinyl acetate copolymerization rubber powder, acrylate and styrene copolymerized rubber powder (A/S), vinyl acetate and acrylate and higher aliphatic vinyl acetate terpolymer rubber powder, one or more in vinyl acetate homopolymerization rubber powder or vinylbenzene and butadiene copolymer rubber powder.
Polymer emulsion is selected from one or more in emulsion in EVA emulsion, vinyl acetate emulsion, pure-acrylic emulsion, benzene, styrene-butadiene emulsion, the equal emulsion of vinegar.
Plasticity-retention agent is selected from one or more in wilkinite, diatomite, methylcellulose gum (HPMC), methyl hydroxyethylcellulose ether (MHPC), methylhydroxypropylcellulose ether (MHPC), hydroxyethyl ether cellulose (HEC), carboxymethyl cellulose (CMC) and lignin fibre.
Starch ethers is common starch ether or treated starch ether.
Powder filler is one or more in silica powder, Paris white, sierozem power, potter's clay, talcum powder or mica powder.
Quartz sand is grating artificial sand or natural sand.
Owing to having selected the binding agent of two kinds of different shapes, therefore sealing material is in the preparation, also has two kinds of diverse ways:
Binding agent for use is pva powder or redispersable latex powder, reinforcing bar grouting transom sealing material is when preparing, first raw material is taken by formula, quartz sand, powder filler, cement, active admixture, water reducer, hardening accelerator, swelling agent, binding agent, plasticity-retention agent, starch ethers is added successively in stirrer, stir, prepare single component powdery sealing material.
Binding agent for use is polymer emulsion, reinforcing bar grouting transom sealing material is when preparing, raw material is taken by formula, quartz sand, powder filler, cement, active admixture, water reducer, hardening accelerator, swelling agent, plasticity-retention agent, starch ethers is added successively in stirrer, stir and obtain power-product, take liquid-containing binder by weight and obtain liquid product.
Utilize the sealing material prepared, the encapsulation process before bar connecting grouting can be carried out, comprise the following steps:
(1) before sealing 6 ~ 12 hours, to sprinkle water surface of base fully, comprehensively moistening.Seal first 1 hour, blow off with pressurized air and swim, also with things such as cotton, staple, sponges, water can be wiped, blot only.
(2) for single-component by sealing material: take dry powder seal material and put into agitation vat, take water in proportion and pour in agitation vat, adopt handheld stirring machine stir within 3-5 minute, obtain uniform seal sand slurry; For two component sealing material: take dry powder seal material and put into agitation vat, take liquid-containing binder and water in proportion, pour into after binding agent and water mix in agitation vat, adopt handheld stirring machine to stir and obtain uniform seal sand slurry in 3-5 minute;
(3) for improving cohesive force, within the scope of the 20mm of sideline, criticizing one deck 2-3mm seal sand slurry with little scraper make interface processing in post, body of wall lower end surrounding.
(4) special caulking gun head is inserted in sealing material, by pull of vacuum, sealing material is sucked in caulking gun, also can directly sealing material be poured in special electric caulking machine stand-by.
(5) sliding for preventing seal sand slurry from falling, in post, wall bottom shelf dead level, put into a L-type steel bar (also can substitute with moulding rod or batten), the long limit of steel bar is used as the backer of seal sand slurry, and length is advisable with 10-50cm, minor face is used as the handle of movement, and length is advisable with 5-20cm.The height of the L-type steel bar put into is slightly less than Stilt layer, and be advisable can freely fill in, the long limit of steel bar is parallel to post, wall base, apart from post, wall outer side about 20mm outside steel bar.
(6) carry out seal construction with caulking gun or caulking machine with injection system, in Stilt layer, inject seal sand slurry toward opposite side from side along pillar, wall outer side lower end frame dead level, and strike off mortar with spatula.If do not adopt caulking gun or caulking machine, also with spatula, seal sand slurry can be pressed in space.
(7) partially sealed complete after, gently twitch steel bar move along post, wall base to the other end, repeating step (5), (6), until post, wall the other end Stilt layer are also sealed, pinch steel bar minor face rotational angle and extract out gently.
(8) sealing of inspection post, wall surrounding, locally falls sliding phenomenon if find that there is or hole should be repaired by timely seal sand slurry.
Count when self-watering stirs, encapsulation process should complete in 40 minutes.
After encapsulation process completes, 12 hours summers, 24 hours winters, bar connecting grouting treatment can be carried out.
Embodiment 1
Preparation method: take various starting material by formula, quartz sand, fleut (sierozem power), cement (P.O 42.5 ordinary Portland cement), active admixture (flyash), water reducer (naphthalene series high-efficiency water-reducing agent) is added successively in stirrer, hardening accelerator (calcium formiate), swelling agent (UEA swelling agent), binding agent (ethylene/vinyl acetate latex powder), plasticity-retention agent (wilkinite, methyl hydroxyethylcellulose ether), starch ethers, stir, packaging forms product.
As previously mentioned, the water yield wherein added is 15% of sealing material weight to constructional method.
The sealing material that said components prepares by previous process, have operable time long, intensity is high, the feature that cohesive force is strong, plasticity is good, is applicable to hot weather construction.
Embodiment 2
Preparation method: take various starting material by formula, quartz sand, powder filler (Paris white), cement (silicate cement), active admixture (silicon ash), water reducer (polycarboxylate water-reducer), hardening accelerator (anhydrous sodium sulphate), swelling agent (UEA swelling agent), binding agent (polyvinyl alcohol), plasticity-retention agent (wilkinite, methylcellulose gum), treated starch ether is added successively in stirrer, stir, packaging forms product.
As previously mentioned, the water yield wherein added is 20% of sealing material weight to constructional method.
The sealing material that said components prepares by previous process, have time of coagulation moderate, intensity is higher, the feature that cohesive force is strong, plasticity is good, is applicable to spring and autumn construction.
Embodiment 3
Preparation method: take various starting material by formula, quartz sand, fleut (talcum powder), cement (aluminate cement), active admixture (silicon ash, slag micropowder), water reducer (melamine water reducing agent) is added successively in stirrer, hardening accelerator (calcium formiate), swelling agent (ZY swelling agent), binding agent (vinyl acetate homopolymerization rubber powder), plasticity-retention agent (diatomite, carboxymethyl cellulose), starch ethers, stir, packaging forms product.
As previously mentioned, the water yield wherein added is 16% of sealing material weight to constructional method.
The sealing material that said components prepares by previous process, have time of coagulation short, early strength is high, the feature that cohesive force is strong, plasticity is good, is suitable for winter construction and reinforcing bar grouting connection construction cycle shorter occasion.
Embodiment 4
Preparation method: take various starting material by formula, quartz sand, fleut (mica powder), cement (aluminosulfate cement), active admixture (silicon ash, flyash), water reducer (melamine water reducing agent) is added successively in stirrer, hardening accelerator (water glass), swelling agent (calcium oxide), plasticity-retention agent (wilkinite, methylhydroxypropylcellulose ether), starch ethers, stir, packaging forms power-product.Take binding agent (styrene-butadiene emulsion) in proportion, packaging forms liquid product.
As previously mentioned, the water yield wherein added is 12% of powder sealing material weight to constructional method.
Above-mentioned is two component sealing materials, and the sealing material prepared by previous process, has time of coagulation short, and early strength is high, the feature that cohesive force is strong, plasticity is good, is suitable for winter construction and reinforcing bar grouting connection construction cycle shorter occasion.
Embodiment 5
Reinforcing bar grouting transom sealing material, is prepared by the raw material of following component and weight part content:
Silicate cement 100, water reducer 0.01, hardening accelerator 0.01, swelling agent 0.01, plasticity-retention agent 0.01, common starch ether 0.01, quartz sand 10.Wherein, water reducer is Beta-methyl naphthalene sulphonate (naphthalene water reducer), and hardening accelerator is calcium formiate, and swelling agent is calcium oxide expansion agents, and plasticity-retention agent is hydroxyethyl ether cellulose, and quartz sand is grating artificial sand.Reinforcing bar grouting transom sealing material is when preparing, first raw material is taken by formula, in stirrer, add quartz sand, cement, water reducer, hardening accelerator, swelling agent, binding agent, plasticity-retention agent, starch ethers successively, stir, prepare single component powdery sealing material.
Utilize the sealing material prepared, the encapsulation process before bar connecting grouting can be carried out, comprise the following steps:
(1) before sealing 6 ~ 12 hours, to sprinkle water surface of base fully, comprehensively moistening.Seal first 1 hour, blow off with pressurized air and swim, also with things such as cotton, staple, sponges, water can be wiped, blot only.
(2) by ratio requirement, take sealing material and water respectively, the water yield added is 13% of sealing material weight, adopts handheld stirring machine to stir 3-5 minute, obtained uniform seal sand slurry slurry.
(3) for improving cohesive force, within the scope of the 20mm of sideline, criticizing one deck 2-3mm seal sand slurry with little scraper make interface processing in post, body of wall lower end surrounding.
(4) special caulking gun head is inserted in sealing material, by pull of vacuum, sealing material is sucked in caulking gun, also can directly sealing material be poured in special electric caulking machine stand-by.
(5) sliding for preventing seal sand slurry from falling, in post, wall bottom shelf dead level, put into a L-type steel bar (also can substitute with moulding rod or batten), the long limit of steel bar is used as the backer of seal sand slurry, and length is advisable with 10-50cm, minor face is used as the handle of movement, and length is advisable with 5-20cm.The height of the L-type steel bar put into is slightly less than Stilt layer, and be advisable can freely fill in, the long limit of steel bar is parallel to post, wall base, apart from post, wall outer side about 20mm outside steel bar.
(6) carry out seal construction with caulking gun or caulking machine with injection system, in Stilt layer, inject seal sand slurry from left to right along pillar, wall outer side lower end frame dead level, and strike off mortar with spatula.If do not adopt caulking gun or caulking machine, also with spatula, seal sand slurry can be pressed in space.
(7) partially sealed complete after, gently twitch steel bar move along post, wall base to the other end, repeating step (5), (6), until post, wall the other end Stilt layer are also sealed, pinch steel bar minor face rotational angle and extract out gently.
(8) sealing of inspection post, wall surrounding, locally falls sliding phenomenon if find that there is or hole should be repaired with seal sand slurry in time, and count during self-watering stirring, encapsulation process should complete in 40 minutes.After encapsulation process completes, 12 hours summers, 24 hours winters, bar connecting grouting treatment can be carried out.
Embodiment 6
Reinforcing bar grouting transom sealing material, is prepared by the raw material of following component and weight part content:
Trass cement 100, active admixture 80, water reducer 3, hardening accelerator 10, swelling agent 30, binding agent 30, plasticity-retention agent 50, starch ethers 1, powder filler 100, quartz sand 300.Wherein, active admixture is the mixture of flyash and slag powders, and water reducer is melamino-formaldehyde polycondensate, and hardening accelerator is the mixture of sodium sulfate, water glass.Swelling agent is ettringite class swelling agent.
Binding agent can adopt the binding agent of two kinds of different shapes, is respectively powder binder and liquid adhesive, and wherein, powder binder is redispersable latex powder, and liquid adhesive is polymer emulsion.Redispersable latex powder is selected from the multipolymer of ethylene/vinyl acetate, and polymer emulsion is selected from benzene emulsion.
Plasticity-retention agent adopts methylcellulose gum and diatomaceous mixture, and starch ethers is treated starch ether, and powder filler is the mixture of silica powder, Paris white, sierozem power, and quartz sand is natural sand.
Owing to having selected the binding agent of two kinds of different shapes, therefore sealing material is in the preparation, also has two kinds of diverse ways:
Binding agent for use is pva powder or redispersable latex powder, reinforcing bar grouting transom sealing material is when preparing, first raw material is taken by formula, quartz sand, powder filler, cement, active admixture, water reducer, hardening accelerator, swelling agent, binding agent, plasticity-retention agent, starch ethers is added successively in stirrer, stir, prepare single component powdery sealing material.
Binding agent for use is polymer emulsion, reinforcing bar grouting transom sealing material is when preparing, raw material is taken by formula, quartz sand, powder filler, cement, active admixture, water reducer, hardening accelerator, swelling agent, plasticity-retention agent, starch ethers is added successively in stirrer, stir and obtain power-product, by taking binding agent, packaging forms liquid product.
Utilize the sealing material prepared, the encapsulation process before bar connecting grouting can be carried out, comprise the following steps:
(1) before sealing 6 ~ 12 hours, to sprinkle water surface of base fully, comprehensively moistening.Seal first 1 hour, blow off with pressurized air and swim, also with things such as cotton, staple, sponges, water can be wiped, blot only.
(2) for single-component by sealing material: take dry powder seal material and put into agitation vat, take water in proportion and pour in agitation vat, adopt handheld stirring machine stir within 3-5 minute, obtain uniform seal sand slurry; For two component sealing material: take dry powder seal material and put into agitation vat, take liquid-containing binder and water in proportion, pour into after binding agent and water mix in agitation vat, adopt handheld stirring machine to stir and obtain uniform seal sand slurry in 3-5 minute;
(3) for improving cohesive force, within the scope of the 20mm of sideline, criticizing one deck 2-3mm seal sand slurry with little scraper make interface processing in post, body of wall lower end surrounding.
(4) special caulking gun head is inserted in sealing material, by pull of vacuum, sealing material is sucked in caulking gun, also can directly sealing material be poured in special caulking machine stand-by.
(5) sliding for preventing seal sand slurry from falling, in post, wall bottom shelf dead level, put into a L-type steel bar (also can substitute with moulding rod or batten), the long limit of steel bar is used as the backer of seal sand slurry, and length is advisable with 10-50cm, minor face is used as the handle of movement, and length is advisable with 5-20cm.The height of the L-type steel bar put into is slightly less than Stilt layer, and be advisable can freely fill in, the long limit of steel bar is parallel to post, wall base, apart from post, wall outer side about 20mm outside steel bar.
(6) carry out seal construction with caulking gun or caulking machine with injection system, in Stilt layer, inject seal sand slurry from left to right along pillar, wall outer side lower end frame dead level, and strike off mortar with spatula.If do not adopt caulking gun or caulking machine, also with spatula, seal sand slurry can be pressed in space.
(7) partially sealed complete after, gently twitch steel bar move along post, wall base to the other end, repeating step (5), (6), until post, wall the other end Stilt layer are also sealed, pinch steel bar minor face rotational angle and extract out gently.
(8) sealing of inspection post, wall surrounding, locally falls sliding phenomenon if find that there is or hole should be repaired by timely seal sand slurry.Count when self-watering stirs, encapsulation process should complete in 40 minutes, after encapsulation process completes, 12 hours summers, 24 hours winters, can carry out bar connecting grouting treatment.

Claims (6)

1. reinforcing bar grouting transom sealing material, it is characterized in that, sealing material is prepared by the raw material of following component and weight part content:
Cement 100, active admixture 0-80, water reducer 0.01-10, hardening accelerator 0.01-10, swelling agent 0.01-30, binding agent 0-30, plasticity-retention agent 0.01-50, starch ethers 0.01-10, powder filler 0-100, quartz sand 10-300;
Described cement is selected from silicate cement, slag cement, trass cement, pulverized fuel ash cement, one or more in aluminosulfate cement or aluminate cement;
Described active admixture is selected from one or more in slag powders, silicon ash or colliery powder;
Described water reducer is selected from one or more in Beta-methyl naphthalene sulphonate, melamino-formaldehyde polycondensate, polycarboxylate dehydragent and sulfonated lignin;
Described hardening accelerator is selected from one or more in sodium sulfate, water glass, Quilonum Retard, sodium carbonate, calcium chloride or calcium formiate;
Described swelling agent is ettringite or calcium oxide expansion agents;
Described binding agent is polymer emulsion or redispersable latex powder;
Described plasticity-retention agent is selected from one or more in wilkinite, diatomite, methylcellulose gum, methyl hydroxyethylcellulose ether, methylhydroxypropylcellulose ether, hydroxyethyl ether cellulose, carboxymethyl cellulose and lignin fibre.
2. reinforcing bar grouting transom sealing material according to claim 1, is characterized in that, the preferred following component of raw material of described sealing material and weight part content:
Cement 100, active admixture 20-60, water reducer 0.1-5, hardening accelerator 0.1-5, swelling agent 5-20, binding agent 5-20, plasticity-retention agent 0.1-20, starch ethers 0.05-5, powder filler 30-80, quartz sand 50-200.
3. reinforcing bar grouting transom sealing material according to claim 1, is characterized in that,
Described polymer emulsion is selected from one or more in EVA emulsion, vinyl acetate emulsion, pure-acrylic emulsion, benzene emulsion, styrene-butadiene emulsion, the equal emulsion of vinegar;
Described redispersable latex powder is selected from the multipolymer of ethylene/vinyl acetate, ethene and vinylchlorid and vinyl laurate terpolymer rubber powder, vinyl acetate and ethene and higher aliphatic vinyl acetate terpolymer rubber powder, vinyl acetate and higher aliphatic vinyl acetate copolymerization rubber powder, acrylate and styrene copolymerized rubber powder, vinyl acetate and acrylate and higher aliphatic vinyl acetate terpolymer rubber powder, one or more in vinyl acetate homopolymerization rubber powder or vinylbenzene and butadiene copolymer rubber powder.
4. reinforcing bar grouting transom sealing material according to claim 1 and 2, is characterized in that,
Described starch ethers is common starch ether or treated starch ether;
Described powder filler is one or more in silica powder, Paris white, sierozem power, potter's clay, talcum powder or mica powder;
Described quartz sand is grating artificial sand or natural sand.
5. the preparation method of reinforcing bar grouting transom sealing material according to any one of claim 1-4, it is characterized in that, the method takes raw material by formula, quartz sand, powder filler, cement, active admixture, water reducer, hardening accelerator, swelling agent, binding agent, plasticity-retention agent, starch ethers is added successively in stirrer, stir, prepare single component powdery sealing material, wherein, the binding agent of use is pva powder or redispersable latex powder.
6. the preparation method of reinforcing bar grouting transom sealing material according to any one of claim 1-4, it is characterized in that, the method takes raw material by formula, quartz sand, powder filler, cement, active admixture, water reducer, hardening accelerator, swelling agent, plasticity-retention agent, starch ethers is added successively in stirrer, stir and obtain power-product, take binding agent by weight, packaging forms liquid product, and the binding agent wherein used is polymer emulsion.
CN201310062284.2A 2013-02-27 2013-02-27 Reinforcing bar grouting transom sealing material and its preparation method and application CN103159441B (en)

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