CN103803832A - Formula and method for preparing post-tensioned prestress duct grouting agent - Google Patents
Formula and method for preparing post-tensioned prestress duct grouting agent Download PDFInfo
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- CN103803832A CN103803832A CN201310710748.6A CN201310710748A CN103803832A CN 103803832 A CN103803832 A CN 103803832A CN 201310710748 A CN201310710748 A CN 201310710748A CN 103803832 A CN103803832 A CN 103803832A
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Abstract
The invention discloses a formula and method for preparing a post-tensioned prestress duct grouting agent. According to the formula, the post-tensioned prestress duct grouting agent contains the following components in percentage by mass: 3-5% of carboxylic acid, 1.5-3% of defoaming agent, 3-10% of sulphoaluminate expanding agent, 10-30% of silica fume, 60-80% of mineral powder and 3-5% of magnesium oxide. The grouting agent is prepared from the carboxylic acid, defoaming agent, silica fume, mineral powder, sulphoaluminate and magnesium oxide; the grouting agent prepared by the invention is good in flowability, wide in adaptability and free of bleeding; the setting time at the temperature of 25 DEG C is 8-12h. The grouting agent prepared by the invention can be directly prepared into a grouting material together with cement and can be directly used in a construction site through adding water, so that the problems of wide component range, high application difficulty and long powder setting time in the traditional preparation formula of the grouting agent are better solved.
Description
Technical field
The invention belongs to building material technical field, relate in particular to a kind of formula and method of preparing post-stressed hole path pressure grouting agent.
Background technology
JTG/T F50-2011 standard has been carried out 2 years, and the existing grouting agent of Kai Di company all adopts the on-the-spot cement formula of now filling a prescription, and formula variation is large, and workability is poor, and cost is high, and time of coagulation is long.
Prior art one:
A kind of post-stressed concrete pore passage grouting agent and preparation method, mud jacking material are disclosed.The weight percent of described grouting agent consists of: mineral admixture 65～85%, water reducer 2～10%, swelling agent 3～20%, anti-settling agent 0.2～0.6%, defoamer 0.4～1.5%, retardant 0.1～5%, rust inhibitor 0.1～5%, and the alkalinity of described swelling agent is less than 0.5%, chloride ion content is less than 0.03%.Grouting agent is mixed to cement and water, stir and make mud jacking material.It is low that post-stressed concrete pore passage grouting agent of the present invention has water-cement ratio, good fluidity, and not bleeding, not stratified, microdilatancy, pumping is good, and formula adjustment degree of freedom is large, feature simple to operate.Especially post-stressed concrete pore passage grouting agent of the present invention meets the requirement of highway bridge and culvert construction technique normalizing (JTG/TF50-2011) completely, is specially adapted to the hole path pressure grouting of highway bridge and culvert.
Prior art two:
Relate to a kind of swelling agent, post-stressed concrete pore passage grouting agent and grouting material.Described swelling agent comprises: nitrogen type swelling agent, gypsum and magnesium oxide, and described nitrogen type swelling agent, gypsum and magnesian mass ratio are 0.3-0.6: 30: 3-15.Post-stressed concrete pore passage grouting agent comprises: water reducer 5-12 mass parts, stablizer 0.3-0.7 mass parts, mineral admixture 18-60 mass parts, hardening accelerator 0-15 mass parts and swelling agent 35-50 mass parts provided by the invention.A kind of post stressed concrete grouting material is also provided, comprises silicate cement, water and grouting agent provided by the invention, the mass ratio of wherein said grouting agent and silicate cement is 10-20: 80-90, and the scope of water-cement ratio is 0.26-0.28.In the process of grouting material slurry sclerosis, produce and continue and stable expansion effect, can fit tightly with deformed bar and structural concrete effective transmission of proof stress.
In existing technical formula, each compositional range is large, and practical application difficulty is large, and the carboxylic acid water reducer pulvis that formula adopts market to buy is long time of coagulation, and the time exceedes 24 hours sometimes.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of formula and method of preparing post-stressed hole path pressure grouting agent, and the compositional range that is intended to the preparation formula existence that solves existing grouting agent is large, and application difficulty is large, pulvis long problem time of coagulation.
The embodiment of the present invention is to realize like this, a kind of formula of preparing post-stressed hole path pressure grouting agent, this formula of preparing post-stressed hole path pressure grouting agent is by mass percentage: carboxylic acid 3%～5%, defoamer 1.5%～3%, aluminium sulfate expanding agent 3%～10%, silicon ash 10%～30%, breeze 60%～80%, magnesium oxide 3%～5%.
Further, this formula the best of preparing post-stressed hole path pressure grouting agent is specially by mass percentage: carboxylic acid 4%, defoamer 2%, silicon ash 20%, breeze 68%, sulplo-aluminate 3%, magnesium oxide 3%.
Further, the preparation formula of defoamer is: the weight percent of breeze and silicone antifoam agent is 1: 0.17.
Further, the preparation method of defoamer is: 1kg breeze mixes with 0.17kg silicone antifoam agent, and crushed after being dried is sieved.
Another object of the embodiment of the present invention is to provide a kind of method of preparing post-stressed hole path pressure grouting agent, and this method of preparing post-stressed hole path pressure grouting agent comprises the following steps:
Step 1: by even in ratio mix in stirrer of 0.17kg silicone antifoam agent and 1kg breeze to silicone antifoam agent and breeze, then through super-dry, pulverizing, make the powdery defoamer that granularity is less than 0.08mm;
Step 2: by mud jacking agent prescription be by mass percentage again: carboxylic acid 3%～5%, defoamer 1.5%～3%, aluminium sulfate expanding agent 3%～10%, silicon ash 10%～30%, breeze 60%～80%, magnesium oxide 3%～5%, stirs at replicating machine after the material metering of requirement;
Step 3: metering packing.
Further, all methods of post-stressed hole path pressure grouting agent are:
By mixing 10% volume in grouting agent, take cement and grouting agent, take mixing water consumption by water-cement ratio 0.26～0.28,80% mixing water and grouting agent are put into the agitator kettle of stirrer, under low rate mixing, slowly add cement, low rate mixing 2min, after stirring, rapid stirring 3min～5min, stop, remaining mixing water is all poured into, then low rate mixing 1min, form slurries, then carry out mud jacking operation according to hole path pressure grouting technique.
Formula and the method for the post-stressed hole path pressure grouting agent of preparation provided by the invention, by adopting carboxylic acid, defoamer, silicon ash, breeze, sulplo-aluminate, magnesium oxide, prepare grouting agent; Grouting agent good fluidity prepared by the present invention, wide adaptability, not bleeding, in the time of 25 ℃, be 8 hours～12 hours time of coagulation.The grouting agent of the present invention preparation can directly be mixed with grouting material with cement, and uses that directly add water in building site better solved the compositional range that the preparation formula of existing grouting agent exists large, and application difficulty is large, the problem of pulvis length time of coagulation.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of the post-stressed hole path pressure grouting agent of preparation that provides of the embodiment of the present invention;
Fig. 2 is the schematic diagram that affects that carboxylic acid that the embodiment of the present invention provides adds breeze flow performance;
Fig. 3 is the schematic diagram that affects that carboxylic acid that the embodiment of the present invention provides adds pit coal ore deposit flow performance;
Fig. 4 is the schematic diagram that affects of the defoamer flow performance that provides of the embodiment of the present invention;
Fig. 5 is the affect schematic diagram of the silicon ash that provides of the embodiment of the present invention on fluidity of slurry;
Fig. 6 is the schematic diagram that affects of the sulplo-aluminate flow that provides of the embodiment of the present invention;
Fig. 7 is the schematic diagram that affects of the swelling agent flow that provides of the embodiment of the present invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Below in conjunction with drawings and the specific embodiments, application principle of the present invention is further described.
The formula of the post-stressed hole path pressure grouting agent of preparation of the embodiment of the present invention is by mass percentage: carboxylic acid 3%～5%, defoamer 1.5%～3%, aluminium sulfate expanding agent 3%～10%, silicon ash 10%～30%, breeze 60%～80%, magnesium oxide 3%～5%.
The preparation formula of defoamer is: 1kg breeze mixes with 0.17kg silicone antifoam agent, and crushed after being dried is sieved.
As shown in Figure 1, the method for the post-stressed hole path pressure grouting agent of the preparation of the embodiment of the present invention comprises the following steps:
S101: by even in ratio mix in stirrer of 0.17kg silicone antifoam agent and 1kg breeze to silicone antifoam agent and breeze, then through super-dry, pulverizing, make the powdery defoamer that granularity is less than 0.08mm;
S102: by mud jacking agent prescription be by mass percentage again: carboxylic acid 3%～5%, defoamer 1.5%～3%, aluminium sulfate expanding agent 3%～10%, silicon ash 10%～30%, breeze 60%～80%, magnesium oxide 3%～5%, stirs at replicating machine after the material metering of requirement;
S103: metering packing.
The using method of the method for the post-stressed hole path pressure grouting agent of preparation of the embodiment of the present invention is:
Equipment performance should meet following provisions: the rotating speed of (1) stirrer should be not less than 1000r/min, the shape of paddle should match with rotating speed, the linear velocity of its blade should not be less than 10m/s, maximum linear velocity should be limited in 20m/s, and can meet the requirement stirring in specific time.(2) also should there is agitating function for the material-storage jar of interim storage slurries, and the filtering net that size of mesh opening is not more than 3mm should be set.(3) pneumatic mortar machine should adopt the mudjack that piston-type can be worked continuously, and its manometric minimum division value should be not more than 0.1MPa, and maximum range should make awp in its range ability of 25%～75%.Must not adopt wind pressure type mudjack to carry out hole path pressure grouting.(4) vacuum pump adopting in vacuum aid grouting technology should be able to reach the negative pressure of 0.10MPa.
Stirring means: by mixing 10% volume in grouting agent, take cement and grouting agent, take mixing water consumption by water-cement ratio 0.26～0.28.The agitator kettle of 80% mixing water and grouting agent being put into stirrer slowly adds cement under low rate mixing, low rate mixing 2min, and after stirring, rapid stirring 3min～5min, stops, remaining mixing water is all poured into, then low rate mixing 1min.Form slurries.
Then carry out mud jacking operation according to hole path pressure grouting technique.
The present invention is described further with experiment with the following Examples:
By mass percentage, optimum proportion is the formula of the post-stressed hole path pressure grouting agent of embodiment of the present invention foundation: carboxylic acid 4%, defoamer 2%, silicon ash 20%, breeze 68%, sulplo-aluminate 3%, magnesium oxide 3%;
Experimental technique:
Grouting agent 300g is put into agitator kettle, pour 80% mixing water into, stir 1min, under stirring at low speed, slowly pour 2.7kg cement into, add rapid stirring 3min after cement, stop, remaining water is poured into, low rate mixing 1min, then measures initial flow degree, places 0.5h and 1h and again measures degree of mobilization;
Experimental result is as shown in the table:
In conjunction with as Fig. 2-Fig. 7, result of use of the present invention being described further:
In order further to understand the impact of each component on grouting agent degree of mobilization, Fig. 2, Fig. 3 are respectively the impact of carboxylic acid different addition quantity on flow velocity, show to adopt different carriers, and after carboxylic acid doping level is greater than 3%, carboxylic acid consumption is little to flow rate effect, consider cost, should select 3%～5%.Fig. 4 represents the impact of different defoamer consumptions on flow velocity, shows that defoamer flow rate effect to grouting agent in 1%～3% amount ranges is little, therefore select 2% consumption.Fig. 5 represents the impact of silicon ash consumption on flow velocity, shows that silicon ash is little to the flow rate effect of grouting agent, but large on the bleeding impact of grouting agent, when silicon ash is larger, slurries bleeding is less, therefore should select 20% consumption.Fig. 6 and Fig. 7 represent respectively swelling agent and the impact of sulplo-aluminate on flow velocity, and while showing the swelling agent consumption increase of two types, grouting agent flow velocity obviously reduces, and considers the expansile requirement of grouting agent, therefore select the consumption of sulplo-aluminate 3%.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (6)
1. prepare the formula of post-stressed hole path pressure grouting agent for one kind, it is characterized in that, this formula of preparing post-stressed hole path pressure grouting agent is by mass percentage: carboxylic acid 3%～5%, defoamer 1.5%～3%, aluminium sulfate expanding agent 3%～10%, silicon ash 10%～30%, breeze 60%～80%, magnesium oxide 3%～5%.
2. the formula of the post-stressed hole path pressure grouting agent of preparation as claimed in claim 1, it is characterized in that, this formula the best of preparing post-stressed hole path pressure grouting agent is specially by mass percentage: carboxylic acid 4%, defoamer 2%, silicon ash 20%, breeze 68%, sulplo-aluminate 3%, magnesium oxide 3%.
3. the formula of the post-stressed hole path pressure grouting agent of preparation as claimed in claim 1, is characterized in that, the preparation formula of defoamer is: the weight percent of breeze and silicone antifoam agent is 1: 0.17.
4. the formula of the post-stressed hole path pressure grouting agent of preparation as claimed in claim 3, is characterized in that, the preparation method of defoamer is: 1kg breeze mixes with 0.17kg silicone antifoam agent, and crushed after being dried is sieved.
5. a method of preparing post-stressed hole path pressure grouting agent, is characterized in that, this method of preparing post-stressed hole path pressure grouting agent comprises the following steps:
Step 1: by even in ratio mix in stirrer of 0.17kg silicone antifoam agent and 1kg breeze to silicone antifoam agent and breeze, then through super-dry, pulverizing, make the powdery defoamer that granularity is less than 0.08mm;
Step 2: by mud jacking agent prescription be by mass percentage again: carboxylic acid 3%～5%, defoamer 1.5%～3%, aluminium sulfate expanding agent 3%～10%, silicon ash 10%～30%, breeze 60%～80%, magnesium oxide 3%～5%, stirs at replicating machine after the material metering of requirement;
Step 3: metering packing.
6. the method for the post-stressed hole path pressure grouting agent of preparation as claimed in claim 5, is characterized in that, all methods of post-stressed hole path pressure grouting agent are:
By mixing 10% volume in grouting agent, take cement and grouting agent, take mixing water consumption by water-cement ratio 0.26～0.28,80% mixing water and grouting agent are put into the agitator kettle of stirrer, under low rate mixing, slowly add cement, low rate mixing 2min, after stirring, rapid stirring 3min～5min, stop, remaining mixing water is all poured into, then low rate mixing 1min, form slurries, then carry out mud jacking operation according to hole path pressure grouting technique.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10265251A (en) * | 1997-03-27 | 1998-10-06 | Mitsubishi Materials Corp | Simple powder type polymer-cement composition for semiflexible paving |
| CN102531502A (en) * | 2012-03-02 | 2012-07-04 | 河南省交通科学技术研究院有限公司 | Post-tensioning prestressed concrete porelike grouting agent and preparation method thereof, and grouting material |
| CN103030321A (en) * | 2012-12-26 | 2013-04-10 | 交通运输部公路科学研究所 | Expanding agent, post-tensioning prestressed concrete porelike grouting agent and grouting material |
| CN103193414A (en) * | 2013-03-08 | 2013-07-10 | 蒋成飞 | Post-tensioning prestressed concrete beam pore high-strength grouting agent |
| CN103435301A (en) * | 2013-08-16 | 2013-12-11 | 武汉格瑞林建材科技股份有限公司 | Upper-flow-regime micro-expanding post-tensioning prestressed porelike grouting agent and preparation method thereof |
-
2013
- 2013-12-23 CN CN201310710748.6A patent/CN103803832A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10265251A (en) * | 1997-03-27 | 1998-10-06 | Mitsubishi Materials Corp | Simple powder type polymer-cement composition for semiflexible paving |
| CN102531502A (en) * | 2012-03-02 | 2012-07-04 | 河南省交通科学技术研究院有限公司 | Post-tensioning prestressed concrete porelike grouting agent and preparation method thereof, and grouting material |
| CN103030321A (en) * | 2012-12-26 | 2013-04-10 | 交通运输部公路科学研究所 | Expanding agent, post-tensioning prestressed concrete porelike grouting agent and grouting material |
| CN103193414A (en) * | 2013-03-08 | 2013-07-10 | 蒋成飞 | Post-tensioning prestressed concrete beam pore high-strength grouting agent |
| CN103435301A (en) * | 2013-08-16 | 2013-12-11 | 武汉格瑞林建材科技股份有限公司 | Upper-flow-regime micro-expanding post-tensioning prestressed porelike grouting agent and preparation method thereof |
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Application publication date: 20140521 |