CN102942338B - Low-heat asphalt for grouting plugging of large leakage quantity and high flow velocity karst and preparation method thereof - Google Patents
Low-heat asphalt for grouting plugging of large leakage quantity and high flow velocity karst and preparation method thereof Download PDFInfo
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- CN102942338B CN102942338B CN201210338041.2A CN201210338041A CN102942338B CN 102942338 B CN102942338 B CN 102942338B CN 201210338041 A CN201210338041 A CN 201210338041A CN 102942338 B CN102942338 B CN 102942338B
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Abstract
A low-heat asphalt for grouting plugging of large leakage quantity and high flow velocity karst and a preparation method thereof. The asphalt comprises the following raw materials, by weight: 100 parts of asphalt, 3-5 parts of water wax, 120 parts of water, 1-3 parts of an emulsifier and 30-80 parts of cement. The low-heat asphalt provided by the invention is an effective grouting material for large leakage quantity and high flow velocity karst or anti-seepage treatment for overhead stratum, and fills up the blank in the current grouting materials. Compared with hot asphalt grouting, under same plugging performance, the low-heat asphalt provided by the invention has low construction temperature, greatly improved construction safety, reliability and controllability, and construction cost reduced by more than 40%. The low-heat asphalt provided by the invention has characteristics of reliable construction effect, high working efficiency and low cost, and can be widely applied to seepage prevention engineering for various underwater constructions, tunnel, bridge pier cofferdam and karst.
Description
Technical field
The present invention relates to the based process technical field of geotechnical engineering, particularly a kind ofly be exclusively used in the karst of large leakage quantity, high flow rate or the grouting leak-stopping material on built on stilts stratum, and the preparation method of this material.
Background technology
Need to adopt different injection materials and technique for the grouting leak-stopping under different opening, different in flow rate.For below aperture 50cm, the 0.5m/s flow velocity can adopt cement underflow, mortar, the modes such as low grading concrete, cement-sodium silicate and rapid hardening cream slurry to carry out with the sub-surface leak stopping, but the karst leak stopping for larger opening and flow velocity does not have specific aim, effective especially injection material at present, many materials a large amount of by perfusion, form stifled body, stop that the grouting fines is not washed away by current.These materials comprise more cheap rubble or light skeletal, as saw foam, wood chip, vermiculite, cotton seed hulls, bag of cement or other fibre plate, band etc.These materials are not only cheap, and the expansion in addition had, but its shortcoming is to be difficult for construction, is difficult to form whole antiseepage body after perfusion.There is price in the polyurethanes chemical grouting material had now for engineering projects such as the leak stopping of concrete structure crack sealing, heavy construction strengthening of foundation, underpass, can not constructs in a large number, mixed poorly soluble with other material, and the problem such as concretion body strength is lower, be difficult to promote.Therefore, still there is no a set of injection material that the antiseepage processing is carried out in karst or the built on stilts stratum of large leakage quantity, high flow rate that is suitable at present.This stratum is that slurries should have good mobility and concrete castability to the requirement of material, and guaranteeing that the slurries that pour into are not all washed away by water and have suitable shock strength within a short period of time and have certain range of scatter, this is also the key of anti-seeping grouting success.
The cardinal principle of bituminous grouting is: pitch does not dissolve each other with water, when pitch is heated to form liquid state, the pitch slurries have good mobility and concrete castability, the pitch slurries enter seepage place by grout pump, meet water will be progressively cooling, solidify, and top layer by the water dilution, break up, inner pitch still has suitable mobility, be conducive to the diffusion of slurries, so pitch has good sealing characteristics.Heated bitumen is in the milk has application example in stoppage engineering at home and abroad, as early 1980s, the heated bitumen application that succeeds in the dam, lower Bake of the U.S. and Canadian Stewart Wei Er dam grouting works, 20 end of the centurys are again successively in the German application of succeeding in than lattice dam, Brazilian Ya Bulu dam and some mines, tunnel shutoff.Domestic bituminous grouting technology also successively is applied in the upstream cofferdam antiseepage of power station, Li Jia gorge, the grouting of lock gate pier expansion joint, mountain, screen-like mountain peak, Jiangsu, flower scenery with hills and waters Hydropower Station Diversion Tunnels leak stopping and seepage control for rock-earth cofferdam of Gongboxia Hydropower Station engineering, and the patent of invention 92103293.5 of Nanjing Beijing Inst. of Water Conservancy and Water and Power Science application has also related to the bituminous grouting anti-seep plugging technology.During due to pitch low temperature, mobility is very poor, can't be pumped into the position that leaks by the grouting pipeline.The working temperature of existing bitumen construction need to be at 120 ℃～200 ℃, because bituminous grouting needs heating, (Heating temperature is more than 150 ℃, the construction working temperature is more than 120 ℃), slurry material viscosity is large, temperature sensitivity is high, working procedure is many, complex process, creep properties is strong, and the poor controllability of filling process, and because grouting works easily occurs because of plugging, plug-hole causes collapse run affairs therefore, hard pitch threatens the reasons such as larger to construction safety, development and the application of bituminous grouting technology have directly been limited, current domestic bituminous grouting state of the art still rests on eighties of last century.
Summary of the invention
The invention provides a kind of low heated bitumen for large leakage quantity, high flow rate karst grouting leak-stopping and preparation method thereof, solving the karst of large leakage quantity, high flow rate or built on stilts stratum carries out impervious leakage-stopping and there is no special-purpose injection material problem, and working temperature is high in the grouting leak-stopping construction, temperature sensitivity is high, slurry material viscosity is large to solve heated bitumen, and the filling process poor controllability, preparation of construction and personal security are threatened to large technical problem.
The technical solution adopted for the present invention to solve the technical problems is:
This low heated bitumen for large leakage quantity, high flow rate karst grouting leak-stopping, its raw material composition and weight part proportioning are as follows:
100 parts of pitches;
3～5 parts, paraffin;
120 parts, water;
1～3 part of emulsifying agent;
30～80 parts of cement.
Described pitch is petroleum pitch or hydraulic asphalt, and its softening temperature is between 40～45 ℃; Penetration degree is 60～120, take 0.1mm as unit.
Described emulsifying agent is to split asphalt emulsifier in positively charged ion.
Described cement is ordinary Portland cement, and grade of cement is not less than P.O42.5, and the particle fineness D95 of cement is less than 80 μ m.
The preparation method of this low heated bitumen for large leakage quantity, high flow rate karst grouting leak-stopping, preparation process is as follows:
Step 1, weigh each raw material by weight ratio;
Step 2 by asphalt heating to 120 ℃, after adding paraffin and stirring, pumps in stirrer in the asphalt heating machine;
Step 3 heats water to 80 ℃ in heating water tank, after adding emulsifying agent and stirring, pumps in stirrer;
Step 4, by stirrer stirring at low speed 1～3min, make material form oil-in-water shape emulsified bitumen;
Step 5 adds cement in stirrer, controls temperature at 60～80 ℃, and stirring at low speed 3～5min, make oil-in-water shape emulsified bitumen part breakdown of emulsion, forms the low heated bitumen of water-in-oil shape;
Step 6, the low heated bitumen that step 5 is obtained is incubated in container can be used for large leakage quantity, high flow rate karst grouting leak-stopping.
Described low heated bitumen apparent viscosity in the time of 60 ℃ is less than 1Pa.s.
The density of described low heated bitumen is greater than 1.1g/cm
3.
The construction temperature of described low heated bitumen, below 80 ℃, is met water cooling and is solidified, do not released by the water punching.
28 days unconfined compression strengths of described low heated bitumen are greater than 3MPa.
Principle of the present invention is as follows:
Emulsified bitumen is " oil-in-water " state when low temperature (room temperature), embodiment be the fluid properties of water, can not directly carry out impervious leakage-stopping; Utilize the thermodynamic phase of emulsified bitumen, after breakdown of emulsion, pitch will separate out from milk sap, form the oily water separation state, embody the character of pitch, meet water-setting solid, do not rush and release, but mobility is very poor during its low temperature, can't be pumped into the position that leaks by the grouting pipeline.The present invention makes the emulsified bitumen breakdown of emulsion insufficient by adding suitable emulsion splitter, pitch has pitch chance water-setting and consolidates, do not rush the character of releasing after partly separating out, moisture is wrapped among pitch particle simultaneously, form " water-in-oil " state, after breakdown of emulsion, pitch has certain flowing property, for further improving its mobility, the breakdown of emulsion process of " water-in-oil " low heated bitumen is put in 60～80 ℃ and carries out, the safety puzzlement that can avoid construction at high temperature to cause equipment, personnel etc.
Low heated bitumen of the present invention has following features and beneficial effect:
(1), the breakdown of emulsion time suitable (<5min), mixture after breakdown of emulsion forms " water-in-oil " state, relatively stable after breakdown of emulsion, has controllability preferably.
(2), there is good mobility (60 ℃ time apparent viscosity be less than 1Pa.s) during low temperature, there is good pumpability.
(3), the density of low heated bitumen is at 1.1g/cm
3, than water weight, be conducive to the underwater diffusion of low-heat pitch slurries.
(4), low-heat bituminous grouting blocking construction temperature is below 80 ℃; meeting water cooling solidifies, is not released by the water punching; low heated bitumen has good the water resistant stream punching property released and sealing characteristics; construction temperature is lower simultaneously; be conducive to use, the maintenance of grouting equipment; reduce the failure rate of grouting equipment, be conducive to workmen's safeguard protection simultaneously, prevent from scalding, spattering wound.
(5), there is the mechanical properties such as enough ultimate compression strength (unconfined compression strength was greater than 3MPa in 28 days).
The karst that low heated bitumen of the present invention is large leakage quantity, high flow rate or built on stilts stratum are carried out antiseepage and are processed effective a kind of injection material, have filled up the blank in current grouting series material.With heated bitumen grouting, compare, in the situation that the leak stopping performance is suitable, the construction temperature of low heated bitumen of the present invention is lower, and working security, reliability and controllability all greatly improve, and construction cost reduces more than 40%.
Low heated bitumen of the present invention has the characteristics such as construction effect is reliable, work efficiency is high, cost is low, can be widely used in the impervious leakage-stopping engineerings such as various submerged structures and basis, tunnel, bridge pier and cofferdam, karst.
embodiment
Embodiment mono-, this low heated bitumen for large leakage quantity, high flow rate karst grouting leak-stopping, and its raw material composition and weight part proportioning are as follows:
100 parts of pitches;
5 parts, paraffin;
100 parts, water;
3 parts of cationic emulsifiers;
40 parts of cement.
Embodiment bis-, this low heated bitumen for large leakage quantity, high flow rate karst grouting leak-stopping, and its raw material composition and weight part proportioning are as follows:
100 parts of pitches;
3 parts, paraffin;
100 parts, water;
1 part of cationic emulsifier;
30 parts of cement.
Embodiment tri-, this low heated bitumen for large leakage quantity, high flow rate karst grouting leak-stopping, and its raw material composition and weight part proportioning are as follows:
100 parts of pitches;
4 parts, paraffin;
120 parts, water;
2 parts of cationic emulsifiers;
60 parts of cement.
Embodiment tetra-, this low heated bitumen for large leakage quantity, high flow rate karst grouting leak-stopping, and its raw material composition and weight part proportioning are as follows:
100 parts of pitches;
5 parts, paraffin;
120 parts, water;
3 parts of cationic emulsifiers;
80 parts of cement.
Embodiment five, this low heated bitumen for large leakage quantity, high flow rate karst grouting leak-stopping, and its raw material composition and weight part proportioning are as follows:
100 parts of pitches;
3 parts, paraffin;
120 parts, water;
2 parts of cationic emulsifiers;
50 parts of cement.
In above-described embodiment one to five, described pitch is petroleum pitch or hydraulic asphalt, and its softening temperature is between 40～45 ℃; Penetration degree is 60～120, take 0.1mm as unit.Emulsifying agent is to split asphalt emulsifier in positively charged ion.Cement is ordinary Portland cement, and grade of cement is not less than P.O42.5, and the particle fineness D95 of cement is less than 80 μ m.
The preparation method of this low heated bitumen for large leakage quantity, high flow rate karst grouting leak-stopping, preparation process is as follows:
Step 1, weigh each raw material by weight ratio;
Step 2 by asphalt heating to 120 ℃, after adding paraffin and stirring, pumps in stirrer in the asphalt heating machine;
Step 3 heats water to 80 ℃ in heating water tank, after adding emulsifying agent and stirring, pumps in stirrer;
Step 4, by stirrer stirring at low speed 1～3min, make material form oil-in-water shape emulsified bitumen;
Step 5 adds cement in stirrer, controls temperature at 60～80 ℃, and stirring at low speed 3～5min, make oil-in-water shape emulsified bitumen part breakdown of emulsion, forms the low heated bitumen of water-in-oil shape;
Step 6, the low heated bitumen that step 5 is obtained is incubated in container can be used for large leakage quantity, high flow rate karst grouting leak-stopping.
Claims (8)
1. the preparation method for the low heated bitumen of large leakage quantity, high flow rate karst grouting leak-stopping is characterized in that preparation process is as follows:
Step 1, weigh each raw material by weight ratio, the described low heated bitumen for large leakage quantity, high flow rate karst grouting leak-stopping, and its raw material composition and weight part proportioning are as follows:
100 parts of pitches;
3～5 parts, paraffin;
120 parts, water;
1～3 part of emulsifying agent;
30～80 parts of cement;
Step 2 by asphalt heating to 120 ℃, after adding paraffin and stirring, pumps in stirrer in the asphalt heating machine;
Step 3 heats water to 80 ℃ in heating water tank, after adding emulsifying agent and stirring, pumps in stirrer;
Step 4, by stirrer stirring at low speed 1～3min, make material form oil-in-water shape emulsified bitumen;
Step 5 adds cement in stirrer, controls temperature at 60～80 ℃, and stirring at low speed 3～5min, make oil-in-water shape emulsified bitumen part breakdown of emulsion, forms the low heated bitumen of water-in-oil shape;
Step 6, the low heated bitumen that step 5 is obtained is incubated in container can be used for large leakage quantity, high flow rate karst grouting leak-stopping.
2. the preparation method of the low heated bitumen for large leakage quantity, high flow rate karst grouting leak-stopping according to claim 1, it is characterized in that: described low heated bitumen apparent viscosity in the time of 60 ℃ is less than 1Pas.
3. the preparation method of the low heated bitumen for large leakage quantity, high flow rate karst grouting leak-stopping according to claim 1, it is characterized in that: the density of described low heated bitumen is greater than 1.1g/cm
3.
4. the preparation method of the low heated bitumen for large leakage quantity, high flow rate karst grouting leak-stopping according to claim 1, it is characterized in that: the construction temperature of described low heated bitumen, below 80 ℃, is met water cooling and is solidified, do not released by the water punching.
5. the preparation method of the low heated bitumen for large leakage quantity, high flow rate karst grouting leak-stopping according to claim 1, it is characterized in that: 28 days unconfined compression strengths of described low heated bitumen are greater than 3MPa.
6. the preparation method of the low heated bitumen for large leakage quantity, high flow rate karst grouting leak-stopping according to claim 1, it is characterized in that: described pitch is petroleum pitch or hydraulic asphalt, and its softening temperature is between 40～45 ℃; Penetration degree is 60～120, take 0.1mm as unit.
7. the preparation method of the low heated bitumen for large leakage quantity, high flow rate karst grouting leak-stopping according to claim 1, it is characterized in that: described emulsifying agent is to split asphalt emulsifier in positively charged ion.
8. the preparation method of the low heated bitumen for large leakage quantity, high flow rate karst grouting leak-stopping according to claim 1, it is characterized in that: described cement is ordinary Portland cement, and grade of cement is not less than P.O42.5, the particle fineness D95 of cement is less than 80 μ m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210338041.2A CN102942338B (en) | 2012-09-13 | 2012-09-13 | Low-heat asphalt for grouting plugging of large leakage quantity and high flow velocity karst and preparation method thereof |
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|---|---|---|---|
| CN201210338041.2A CN102942338B (en) | 2012-09-13 | 2012-09-13 | Low-heat asphalt for grouting plugging of large leakage quantity and high flow velocity karst and preparation method thereof |
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| CN102942338B true CN102942338B (en) | 2014-01-08 |
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| CN103643680A (en) * | 2013-12-10 | 2014-03-19 | 浙江工业大学 | Emulsified asphalt grouting process |
| CN109930606A (en) * | 2019-03-08 | 2019-06-25 | 中国水电建设集团十五工程局有限公司 | Fast blockage impervious grouting construction method |
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| JPS60180949A (en) * | 1984-02-29 | 1985-09-14 | 日瀝化学工業株式会社 | Cement bitumen formed matter for pavement |
| CN100577595C (en) * | 2007-09-14 | 2010-01-06 | 陈宪宏 | Environmental protection inorganic powder material and polymer composite modified emulsification asphalt grouting material |
| CN101948623A (en) * | 2010-09-14 | 2011-01-19 | 江苏省苏安能节能建材科技有限公司 | Rubber powder modified emulsified asphalt and preparation method thereof and CA mortar prepared by emulsified asphalt |
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Granted publication date: 20140108 Termination date: 20170913 |