CN105271890A - Pre-stressed duct grouting agent, and preparation and application methods thereof - Google Patents
Pre-stressed duct grouting agent, and preparation and application methods thereof Download PDFInfo
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Abstract
The invention provides a pre-stressed duct grouting agent which has the characteristics of high fluidity, bleeding prevention and the like. The pre-stressed duct grouting agent comprises the following components: 2 to 10 percent of a water reducing agent, 0.1 to 10 percent of a viscosity modifying agent, 0 to 1 percent of a defoaming agent, and 35 to 78 percent of a coagulation time regulating agent; the coagulation time regulating agent comprises the following components: 28 to 52 percent of clinker, 42 to 68 percent of plaster, 4 to 30 percent of fillers, and 0 to 3 percent of a coagulation accelerator. The invention further provides a preparation method and an application method of the pre-stressed duct grouting agent. The invention has the advantages that the pre-stressed duct grouting agent contains the cement coagulation time regulating agent, so that the coagulation time of a cement-based composite material can be regulated based on external temperature changes to guarantee the normal use and normal strength growth of the cement-based composite material; meanwhile, the cement-based composite material achieves micro-expansion at the later stage due to the addition of the cement coagulation time regulating agent.
Description
Technical field
The invention provides a kind of prestress hole path pressure grouting agent, particularly relate to a kind of prestress hole path pressure grouting agent being added with conditioning agent time of coagulation, also relate to preparation method and the using method of above-mentioned duct grouting agent simultaneously, belong to cement concrete building material field.
Background technology
Cement-base composite material is in use remarkable by temperature variable effect, and when construction process finds temperature lower than 0 DEG C, long, the bleeding time of coagulation seriously even disease such as frost heave appears in cement-based material; And temperature higher than 40 DEG C time, cement-based material condensation too fast causing cannot normal construction.The appearance of the problems referred to above, ensures construction quality often through a series of assist measure, and steam-cured Insulation such as grade is taked in such as prestress hole path pressure grouting construction in winter, hot weather construction need add ice cube to obtain the sufficient engineering time.
Existing portland-type cement conditioning agent time of coagulation, mostly adopt inorganic salts, organic polymer class material, there is temperature influence sensitivity, easily cause the problems such as later strength retraction, and adopt mineral modified matrix material can well solve the problem as cement setting time conditioning agent.
Commercially available prestress hole path pressure grouting agent kind is more, but mostly affects comparatively large by temperature, runs into Extreme Temperature Conditions and is difficult to use.Therefore, there is a need in the art for develop cement setting time conditioning agent basis on, prepare adjustable prestress hole path pressure grouting agent time of coagulation, to ensure that prestress hole path pressure grouting grout can condense normally under condition of different temperatures, thus ensure that the rising of intensity, make prestress wire and outer concrete anatomical connectivity closely, effective transmission of proof stress.
Summary of the invention
The invention provides and a kind of there is high workability, prestress hole path pressure grouting agent without features such as bleedings, wherein include cement setting time conditioning agent, can according to the time of coagulation of outside air temperature change adjustment cement-base composite material, ensure that cement-base composite material normally uses the normal growth with intensity, simultaneously the adding of cement setting time conditioning agent, the cement-base composite material later stage is made to produce micro-expansibility.
Realizing the technical scheme that above-mentioned purpose of the present invention adopts is:
A kind of prestress hole path pressure grouting agent, comprise following component, each component and the mass percent shared by each component are: water reducer 2 ~ 10%, viscosity modifier 0.1 ~ 10%, defoamer 0 ~ 1%, time of coagulation conditioning agent 35 ~ 78%, mineral modified component 15 ~ 50%; Described viscosity modifier is welan gum, organic bentonite, gas-phase silica, specific surface area are greater than 800m
2one or more mixture in/kg super finely ground slag; Described mineral modified component is one or more the mixture in silica powder, dicalcium powder, alum stone flour, limestone powder;
Described conditioning agent time of coagulation comprises following component, each component and in time of coagulation conditioning agent shared mass percent be: grog 28 ~ 52%; Gypsum 42 ~ 68%; Filler 4 ~ 30%; Setting accelerator 0 ~ 3%; Described grog is the blocks that bauxite ore obtains after 1300 ~ 1500 DEG C of calcinings; Described filler is one or more mixture of flyash, slag powders, SILICA FUME, silicon powder.
Described water reducer is one or both the mixture in melamine water reducing agent, polycarboxylate dehydragent, naphthalene sulfonic salt water reducer, microballon physics water reducer.
Described defoamer is one or more the mixture in silicone based, polyethers, mineral oils.
Described gypsum is the mixture without one or more in water anhydrite, dihydrate gypsum, semi-hydrated gypsum.
Described setting accelerator is one or more the mixture in Tai-Ace S 150, sodium aluminate, sodium metaaluminate, sodium carbonate, water glass.
The present invention also provides the preparation method of above-mentioned prestress hole path pressure grouting agent simultaneously, comprise the following steps: take water reducer, viscosity modifier, defoamer, mineral modified component, grog, gypsum, filler and setting accelerator according to above-mentioned mass percent, then by levigate for above each component ball mill and mix and make grouting agent; Or first by grog, gypsum, filler and setting accelerator ball mill is levigate mixes, make specific surface area and be not less than 350m
2conditioning agent time of coagulation of/kg, then to mix conditioning agent time of coagulation with all the other component dry powder blenders and makes grouting agent; The specific surface area of described grouting agent is not less than 350m
2/ kg.
Further, present invention also offers the using method of above-mentioned prestress hole path pressure grouting agent, comprise the following steps: first take grouting agent and silicate cement, mix with dry powder blender and make grouting material, in grouting material, the mass percent of grouting agent is 1 ~ 50%, the mass percent of silicate cement is 50 ~ 99%, then grouting material is taken according to water and grouting material weight ratio≤0.33, first water is added in stirrer, add grouting material again and start stirrer simultaneously, stirrer rotating speed >=500r/min, linear velocity 10 ~ 20m/s, stirring 3 ~ 8min is continued after grouting material adds, mud jacking operation is carried out after slurrying completes,
Or do not adopt dry powder blender to mix grouting agent and silicate cement, but first add water when stirring in stirrer, then add grouting agent, finally add silicate cement, silicate cement adds rear stirring 2 ~ 6min.
Compared with prior art, the substantive distinguishing features that has of the present invention or marked improvement as follows:
(1) compared with the cement setting time conditioning agents such as traditional retardant, setting accelerator, the present invention is made up of mineral material, do not affect cement-base composite material early stage and later strength after using, proof strength grows steadily, and avoids the diseases such as later strength retraction.Especially adopted alum stone flour and dicalcium powder are relative to other mineral fillers, have that cost is low, the feature of wide material sources, the more important thing is and increase cement grout toughness and intensity, particularly increase the folding strength of cement grout, being formed in cement grout can also skeleton, add the intensity of mud jacking slurries, and the surface luster of test block after improving sclerosis and planarization.
(2) the present invention has outside adjustment cement setting time, also has effect of microdilatancy, ensures that the cement-based material later stage does not shrink.
(3) welan gum is a kind of special microbial source saccharan, and its aqueous solution has very high pseudo-plasticity (shear shinning).Under the condition of static and low-shearing power, it shows a kind of very high viscosity, for adding cement grout denseness in grouting agent, mud jacking slurries is suspended, stable.The feature that welan gum is different from other viscosity modifying material mainly contains: while 1, increasing cement grout stability, can not affect the mobility of cement grout, ensures that the vertex of prestress pipe is without bleeding; 2, stability is high.Cement grout hot weather construction temperature can reach more than 50 DEG C, makes cement grout still maintain excellent stability and viscosity.3, there is very high pseudo-plasticity (shear shinning).Show a kind of very high stability in Water Under slurry liquid that is static and low-shearing power, what ensure that mud jacking constructs carries out smoothly.
(4) the microballon physics water reducer adopted in the present invention is spherical mineral micro powder composition primarily of microscopic particles, the advantage had relative to traditional chemical water reducer is: 1, viscosity reduction characteristic: " the ball effect " of global shape, remarkable reduction grout shear-stress, reduces the plastic viscosity of concrete or mortar.2, mineral diminishing characteristic: the fillibility of global shape ultra-fine grain and " ball effect ", significantly reduce the water consumption of grout, water-reducing rate reaches 15%, and has perfect additive effect with chemical water reducer.3, pumping and thixotropic behavior: the ultra-fine characteristic of global shape has splendid lubrication improvement result to prestress hole path pressure grouting, significantly reduces prestress hole path pressure grouting pressure.4, high strength: there is superfine nature with active preferably, participate in hydrated reaction of cement, improve the degree of compactness of mud jacking slurries, increase grout sclerosis later strength.
(5) based on the prestress hole path pressure grouting agent of above-mentioned 4; work in coordination with between each component and play a role; therefore, it is possible under-10 DEG C ~+45 DEG C environment with portland-type cement with the use of; ensure that normal construction; not only there is high workability, without bleeding feature, also there is the performances such as adjustable, later stage microdilatancy time of coagulation, make prestress hole path pressure grouting full; effective protection is formed to prestress wire, ensures prestressed effective transmission.
Embodiment
Below in conjunction with specific embodiment, detailed specific description is done to the present invention, but protection scope of the present invention is not limited to following examples.
In following examples, grog is the blocks that bauxite ore obtains after 1300 ~ 1500 DEG C of calcinings.Defoamer is one or more the mixture in silicone based, polyethers, mineral oils.The specific surface area of prestress hole path pressure grouting agent prepared in following examples is not less than 350m
2/ kg.
Embodiment 1
Raw material is taken according to part by weight, be specially: polycarboxylate dehydragent 4%, microballon physics water reducer 2%, welan gum 0.4%, defoamer 0.6%, 200 order silica powders 34%, grog 19%, dihydrate gypsum 16%, without water anhydrite 16%, flyash 8%, uses that ball mill is levigate mixes, and makes grouting agent.
Take the grouting agent of 8% according to weight, 52.5 grades of ordinary Portland cements of 92%, use dry powder blender to mix and make grouting material.
Ambient air temperature 20 ± 5 DEG C, water-cement ratio 0.26, after the stirrer that adds water, open stirrer, stirrer rotating speed 1000r/min, linear velocity 15m/s, then evenly add grouting material in stirrer, and powder adds rear stirring 5min, carries out mud jacking after slurrying completes.Detect according to " highway bridge and culvert construction technique normalizing " JTG/TF50-2011 and " highway engineering prestressed pore passage grouting material (agent) " JT/T946-2014 the cement grout of preparation, specific targets are in table 1.
Embodiment 2
Take raw material according to part by weight, be specially: naphthalene water reducer 6%, microballon physics water reducer 4%, white carbon black 0.2%, defoamer 0.8%, 400 order alum stone flours 16%, grog 23%, half water anhydrite 14%, dihydrate gypsum 20%, slag powders 6%, SILICA FUME 8%, Tai-Ace S 150 2%, uses that ball mill is levigate mixes, and makes grouting agent.
Take the grouting agent of 10% according to weight, the 52.5R level silicate cement of 90%, use dry powder blender to mix and make grouting material.
Ambient air temperature-5 ± 5 DEG C, water-cement ratio 0.24, after the stirrer that adds water, open stirrer, stirrer rotating speed 1000r/min, linear velocity 15m/s, then evenly add grouting material in stirrer, and powder adds rear stirring 3min, carries out mud jacking after slurrying completes.Detect according to " highway bridge and culvert construction technique normalizing " JTG/TF50-2011 and " highway engineering prestressed pore passage grouting material (agent) " JT/T946-2014 the cement grout of preparation, specific targets are in table 1.
Embodiment 3
Take raw material according to part by weight, be specially: polycarboxylate dehydragent 3%, organic bentonite 0.4%, defoamer 0.6%, 600 order limestone powders 44%, grog 26%, without water anhydrite 23%, slag powders 3%, uses that ball mill is levigate mixes, and makes grouting agent.
Take the grouting agent of 12% according to weight, 42.5 grades of ordinary Portland cements of 88%, use dry powder blender to mix and make grouting material.
Ambient air temperature 40 ± 5 DEG C, water-cement ratio 0.28, after the stirrer that adds water, open stirrer, stirrer rotating speed 1000r/min, linear velocity 15m/s, then evenly add grouting material in stirrer, and powder adds rear stirring 5min, carries out mud jacking after slurrying completes.Carry out Performance Detection to the cement grout of preparation according to " highway bridge and culvert construction technique normalizing " JTG/TF50-2011 and " highway engineering prestressed pore passage grouting material (agent) " JT/T946-2014, specific targets are in table 1.
Embodiment 4
Take raw material according to part by weight, be specially: the grog of 50%, 20% without water anhydrite, the dihydrate gypsum of 23%, the SILICA FUME of 7%, the setting accelerator of 0% takes raw material, uses that ball mill is levigate mixes, and prepares cement setting time conditioning agent.
Take the polycarboxylate dehydragent of 5% according to weight, the super finely ground slag of 6%, the defoamer of 0.6%, the conditioning agent above-mentioned time of coagulation of 400 order silica powders 46%, 42.4%, use dry powder blender to mix and makes grouting agent.
Ambient air temperature 20 ± 5 DEG C, water-cement ratio 0.26, grouting agent and 42.5 ordinary Portland cement weight ratios are 1:19, adding grouting agent according to first adding water afterwards, finally adding the order of portland-type cement and join in stirrer, stirrer rotating speed 1000r/min, linear velocity 15m/s, powder adds rear stirring 3min, carries out mud jacking after slurrying completes.Carry out Performance Detection to the cement grout of preparation according to " highway bridge and culvert construction technique normalizing " JTG/TF50-2011 and " highway engineering prestressed pore passage grouting material (agent) " JT/T946-2014, specific targets are in table 1.
Embodiment 5
Take raw material according to part by weight, be specially: the grog of 38%, the dihydrate gypsum of 52%, the flyash of 9%, the sodium carbonate of 1% takes raw material, uses that ball mill is levigate mixes, and prepares cement setting time conditioning agent.
Take naphthalene water reducer 4% according to weight, microballon physics water reducer 6%, white carbon black 4%, defoamer 0.8%, 800 order limestone powders 30%, conditioning agent 55.2%, used dry powder blender to mix and made grouting agent above-mentioned time of coagulation.
Ambient air temperature-5 ± 5 DEG C, water-cement ratio 0.23, grouting agent and 62.5R silicate cement weight ratio are 1:9, adding grouting agent according to first adding water afterwards, finally adding the order of cement and join in stirrer, stirrer rotating speed 1000r/min, linear velocity 15m/s, powder adds rear stirring 3min, carries out mud jacking after slurrying completes.Detect according to " highway bridge and culvert construction technique normalizing " JTG/TF50-2011 and " highway engineering prestressed pore passage grouting material (agent) " JT/T946-2014 the cement grout of preparation, specific targets are in table 1.
Embodiment 6
Take raw material according to part by weight, be specially: the grog of 29%, the dihydrate gypsum of 62%, the silica powder of 9%, the setting accelerator of 0% takes raw material, uses that ball mill is levigate mixes, and prepares cement setting time conditioning agent.
Take melamine water reducing agent 5% according to weight, white carbon black 9%, defoamer 0.8%, 400 order dicalcium powders 49%, conditioning agent 36.2%, used dry powder blender to mix and made grouting agent above-mentioned time of coagulation.Ambient air temperature 40 ± 5 DEG C, water-cement ratio 0.28, grouting agent and 42.5 grades of ordinary Portland cement weight ratios are 1:5.7, adding grouting agent according to first adding water afterwards, finally adding the order of cement and join in stirrer, stirrer rotating speed 1000r/min, linear velocity 15m/s, powder adds rear stirring 3min, carries out mud jacking after slurrying completes.Detect according to " highway bridge and culvert construction technique normalizing " JTG/TF50-2011 and " highway engineering prestressed pore passage grouting material (agent) " JT/T946-2014 the cement grout of preparation, specific targets are in table 1.
Embodiment 7
Take raw material according to part by weight, be specially: polycarboxylate dehydragent 3%, welan gum 0.4%, defoamer 0.6%, 200 order silica powders 27%, grog 16%, without water anhydrite 20%, flyash 16%, slag powders 17%, uses that ball mill is levigate mixes, and makes grouting agent.
Take the grouting agent of 7% according to weight, 42.5 grades of ordinary Portland cements of 93%, use dry powder blender to mix and make grouting material.
Ambient air temperature 40 ± 5 DEG C, water-cement ratio 0.32, after the stirrer that adds water, open stirrer, stirrer rotating speed 1000r/min, linear velocity 15m/s, then evenly add grouting material in stirrer, and powder adds rear stirring 5min, carries out mud jacking after slurrying completes.Carry out Performance Detection to the cement grout of preparation according to " railway post stressed concrete beam pipe mudjacking technical qualification " TB/T3192-2008, specific targets are in table 1.
Embodiment 8
Take raw material according to part by weight, be specially: the grog of 38%, the dihydrate gypsum of 52%, the flyash of 9%, the sodium carbonate of 1% takes raw material, uses that ball mill is levigate mixes, and prepares cement setting time conditioning agent.
Take naphthalene water reducer 8% according to weight, microballon physics water reducer 2%, white carbon black 2%, welan gum 2%, defoamer 0.4%, 600 order dicalcium powders 33%, conditioning agent 52.6%, used dry powder blender to mix and made grouting agent above-mentioned time of coagulation.
Ambient air temperature-5 ± 5 DEG C, water-cement ratio 0.30, grouting agent and 52.5R silicate cement weight ratio are 1:9, adding grouting agent according to first adding water afterwards, finally adding the order of cement and join in stirrer, stirrer rotating speed 1000r/min, linear velocity 15m/s, powder adds rear stirring 6min, carries out mud jacking after slurrying completes.Carry out Performance Detection to the cement grout of preparation according to " railway post stressed concrete beam pipe mudjacking technical qualification " TB/T3192-2008, specific targets are in table 1.
As can be seen from Table 1, each embodiment is under differing temps envrionment conditions, and technical indicator all can meet the requirement of associated specifications, for construction provides strong guarantee.
The present invention is not limited to above-described embodiment, only with above-described embodiment, feasibility of the present invention is described, is not intended to limit.To the amendment that above-described embodiment carries out, or to wherein partly or entirely technical characteristic carry out equivalent replacement, corresponding technical scheme can not be made to depart from the scope of various embodiments of the present invention technical scheme.
Claims (7)
1. a prestress hole path pressure grouting agent, is characterized in that comprising following component, and each component and the mass percent shared by each component are: water reducer 2 ~ 10%, viscosity modifier 0.1 ~ 10%, defoamer 0 ~ 1%, time of coagulation conditioning agent 35 ~ 78%, mineral modified component 15 ~ 50%; Described viscosity modifier is welan gum, organic bentonite, gas-phase silica, specific surface area are greater than 800m
2one or more mixture in/kg super finely ground slag; Described mineral modified component is one or more the mixture in silica powder, dicalcium powder, alum stone flour, limestone powder;
Described conditioning agent time of coagulation comprises following component, each component and in time of coagulation conditioning agent shared mass percent be: grog 28 ~ 52%; Gypsum 42 ~ 68%; Filler 4 ~ 30%; Setting accelerator 0 ~ 3%; Described grog is the blocks that bauxite ore obtains after 1300 ~ 1500 DEG C of calcinings; Described filler is one or more mixture of flyash, slag powders, SILICA FUME, silicon powder.
2. prestress hole path pressure grouting agent according to claim 1, is characterized in that: described water reducer is one or both the mixture in melamine water reducing agent, polycarboxylate dehydragent, naphthalene sulfonic salt water reducer, microballon physics water reducer.
3. prestress hole path pressure grouting agent according to claim 1, is characterized in that: described defoamer is one or more the mixture in silicone based, polyethers, mineral oils.
4. prestress hole path pressure grouting agent according to claim 1, is characterized in that: described gypsum is the mixture without one or more in water anhydrite, dihydrate gypsum, semi-hydrated gypsum.
5. prestress hole path pressure grouting agent according to claim 1, is characterized in that: described setting accelerator is one or more the mixture in Tai-Ace S 150, sodium aluminate, sodium metaaluminate, sodium carbonate, water glass.
6. the preparation method of prestress hole path pressure grouting agent according to claim 1, it is characterized in that comprising the following steps: take water reducer, viscosity modifier, defoamer, mineral modified component, grog, gypsum, filler and setting accelerator according to mass percent according to claim 1, then by levigate for above each component ball mill and mix and make grouting agent; Or first by grog, gypsum, filler and setting accelerator ball mill is levigate mixes, make specific surface area and be not less than 350m
2conditioning agent time of coagulation of/kg, then to mix conditioning agent time of coagulation with all the other component dry powder blenders and makes grouting agent; The specific surface area of described grouting agent is not less than 350m
2/ kg.
7. the using method of prestress hole path pressure grouting agent according to claim 1, it is characterized in that comprising the following steps: first take grouting agent and silicate cement, mix with dry powder blender and make grouting material, in grouting material, the mass percent of grouting agent is 1 ~ 50%, the mass percent of silicate cement is 50 ~ 99%, then grouting material is taken according to water and grouting material weight ratio≤0.33, first water is added in stirrer, add grouting material again and start stirrer simultaneously, stirrer rotating speed >=500r/min, linear velocity 10 ~ 20m/s, stirring 3 ~ 8min is continued after grouting material adds, mud jacking operation is carried out after slurrying completes,
Or do not adopt dry powder blender to mix grouting agent and silicate cement, but first add water when stirring in stirrer, then add grouting agent, finally add silicate cement, silicate cement adds rear stirring 2 ~ 6min.
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| CN105776944A (en) * | 2016-03-08 | 2016-07-20 | 上海英杉新材料科技有限公司 | Cement base rheological stabilizing agent and preparation method and application thereof |
| CN105967591A (en) * | 2016-05-05 | 2016-09-28 | 武汉华中科大土木工程检测中心 | High-fluidity duct grouting material suitable for ultra-long pre-stressed ducts, and preparation method thereof |
| CN106365501A (en) * | 2016-09-09 | 2017-02-01 | 山西科腾环保科技股份有限公司 | Porelike grouting agent and preparation method and use method thereof |
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| CN106892595A (en) * | 2017-02-21 | 2017-06-27 | 湖北工业大学 | The preparation method of early strength prestressed hole path pressure grouting material |
| CN110981277A (en) * | 2019-12-17 | 2020-04-10 | 武汉品泰特种建材科技有限公司 | High-strength prestressed duct grouting agent |
| CN111484269A (en) * | 2019-01-28 | 2020-08-04 | 西南科技大学 | Viscosity regulator for cement-based grouting material and preparation method thereof |
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| CN105776944A (en) * | 2016-03-08 | 2016-07-20 | 上海英杉新材料科技有限公司 | Cement base rheological stabilizing agent and preparation method and application thereof |
| CN105967591A (en) * | 2016-05-05 | 2016-09-28 | 武汉华中科大土木工程检测中心 | High-fluidity duct grouting material suitable for ultra-long pre-stressed ducts, and preparation method thereof |
| CN106365501A (en) * | 2016-09-09 | 2017-02-01 | 山西科腾环保科技股份有限公司 | Porelike grouting agent and preparation method and use method thereof |
| CN106431047A (en) * | 2016-10-13 | 2017-02-22 | 中建商品混凝土眉山新材料有限公司 | Thixotropic agent for polycarboxylate superplasticizer, thixotropic type polycarboxylate superplasticizer and application of thixotropic agent |
| CN106431047B (en) * | 2016-10-13 | 2019-03-26 | 中建商品混凝土眉山新材料有限公司 | Polycarboxylate water-reducer thixotropic agent, thixotropic polycarboxylate water-reducer and its application |
| CN106892595A (en) * | 2017-02-21 | 2017-06-27 | 湖北工业大学 | The preparation method of early strength prestressed hole path pressure grouting material |
| CN106892595B (en) * | 2017-02-21 | 2019-03-26 | 湖北工业大学 | The preparation method of early strength prestressed hole path pressure grouting material |
| CN111484269A (en) * | 2019-01-28 | 2020-08-04 | 西南科技大学 | Viscosity regulator for cement-based grouting material and preparation method thereof |
| CN111484269B (en) * | 2019-01-28 | 2022-11-25 | 西南科技大学 | Viscosity regulator for cement-based grouting material and preparation method thereof |
| CN110981277A (en) * | 2019-12-17 | 2020-04-10 | 武汉品泰特种建材科技有限公司 | High-strength prestressed duct grouting agent |
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