CN103396058B - Hydraulic slightly-expansive cement gel sandstone blast hole blocking material and preparation method thereof - Google Patents
Hydraulic slightly-expansive cement gel sandstone blast hole blocking material and preparation method thereof Download PDFInfo
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- CN103396058B CN103396058B CN201310321513.8A CN201310321513A CN103396058B CN 103396058 B CN103396058 B CN 103396058B CN 201310321513 A CN201310321513 A CN 201310321513A CN 103396058 B CN103396058 B CN 103396058B
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Abstract
The invention provides a hydraulic slightly-expansive cement gel sandstone blast hole blocking material which comprises the following raw components in parts by weight: 50-80 parts of slightly-expansive cement, 20-50 parts of slag powder, 250-300 parts of sands, 1.0-1.2 parts of early strength water reducing agents, 2.5-7 parts of quick-setting agents and 30-40 parts of water. The invention provides a preparation method of the hydraulic slightly-expansive cement gel sandstone blast hole blocking material. The prepared blast hole blocking material has the characteristics of fast condensation and hardening, sufficient early strength, good impermeability, self slight expansion, high compactness, low hydration temperature rise, convenience for construction, no toxicity, environment protection, and the like.
Description
Technical field
The present invention relates to Hydraulic materials technical field, specifically material and compound method are blocked up in a kind of hydraulicity micro-expansion cement glue sandstone big gun hole.
Background technology
Multiple-row blasting is an important step in blast working, directly affects utilization ratio and the blasting effect of explosive energy.Blocking has the effect stoping detonation gas effusion too early from big gun hole, and its effect size is relevant with the physico-mechanical properties of bridge material itself.Good blocking can ensure that explosive fully reacts, and improves the thermo-efficiency of explosive, thus improves utilization ratio and the acting ability of explosive charge energy comprehensively.Therefore, the blasting quality that obtain, the multiple-row blasting material that necessary selectivity is excellent.
Tradition multiple-row blasting material often adopts the tamper such as soil, sand, gravelstone or stone flour, landwaste, fluid, although these materials are cheap, there is more problem:
1, traditional multiple-row blasting material is difficult to form strong blockage body, and especially in underground explosion, loose material and fluid are difficult to insert horizontal big gun hole, reach blocking and require very difficult.
2, traditional multiple-row blasting rigidity of material is inadequate, and blockage body can not be combined closely with big gun hole wall, and especially under high water head effect, multiple-row blasting body may slide outside hole, can increase the explosion harm that surge wave causes.Because be full of water behind weir with in gallery during explosion, the dose of underwater blasting dress is large, and defer time is longer, and like this, explosive produces powerful surge wave when explosion, if blocking improper measures, probably causes " destroying in advance " in initiation process.
3, the density of traditional multiple-row blasting material self and impermeability cannot ensure, thus pressure water can infiltrate big gun hole or coyote hole by multiple-row blasting body, causes the performance degradation of explosive and detonating material, even causes and miss-fire.
Some Novel plug material being main material with sand-cement slurry, the mode of motion in antiskid and resistance to shear, big gun hole, transmits in the effect of detonation gas pressure and the explosion energy energy of absorption and is better than traditional multiple-row blasting material, but also there is certain problem:
1, for ensureing the early strength of blockage body fast development, fast hydration after this type of material require cement chance water, simultaneously with the generation of amount of heat, result in higher internal temperature, for the explosive wire be embedded in big gun hole creates potential safety hazard;
2, relative to traditional multiple-row blasting material, the cost of this type of Novel plug material is higher.
Summary of the invention
The invention provides a kind of rapid coagulation sclerosis, impermeability is good, density strong and material and compound method are blocked up in the hydraulicity micro-expansion cement glue sandstone big gun hole of easy construction.
Material is blocked up in a kind of hydraulicity micro-expansion cement glue sandstone big gun hole, and its feed composition according to weight is: micro-expansion cement 50 ~ 80 parts, slag powders 20 ~ 50 parts, sand 250 ~ 300 parts, early strength water-reducing agent 1.0 ~ 1.2 parts, accelerating chemicals 2.5 ~ 7 parts, 30 ~ 40 parts, water.
Wherein, described micro-expansion cement is seif-citing rate silicate cement or seif-citing rate aluminate cement or expansion aluminosulfate cement.
A compound method for material is blocked up in hydraulicity micro-expansion cement glue sandstone big gun hole, comprises the steps:
(1) by weight ratio 50 ~ 80 parts of micro-expansion cements and 20 ~ 50 parts of slag powders, 1.0 ~ 1.2 parts of early strength water-reducing agents are added in agitator kettle, with 30 ~ 40 parts of water at normal temperatures with the speed that 140 ± 5r/min rotation and 62 ± 5r/min revolve round the sun, stirring at low speed 30 ± 5s, forms slurry;
(2) stirring at low speed adds 250 ~ 300 parts of sands after terminating in slurry;
(3) with the speed that 285 ± 10r/min rotation and 125 ± 10r/min revolve round the sun, high-speed stirring 30 ± 5s;
(4) stop mixing 90s, with a rubber scraping, the material on blade and pot wall is scraped in the middle of pot in the 1st 15s, then continue the speed with 285 ± 10r/min rotation and 125 ± 10r/min revolution, high-speed stirring 60 ± 5s;
(5) before stirring terminates, in 15s, add 2.5 ~ 7 parts of accelerating chemicalss, hydraulicity micro-expansion cement glue sandstone big gun hole can be obtained and block up material.
Wherein, described micro-expansion cement is seif-citing rate silicate cement or seif-citing rate aluminate cement or expansion aluminosulfate cement.
The present invention possesses following beneficial effect:
(1) rapid coagulation sclerosis
Micro-expansion cement is one of big gun hole of the present invention main material blocking up material, and it to harden in atmosphere, can harden again in water, and sand and other raw materials can be bonded together securely, the final gelling material forming firm Shi Zhuanti.And adding of accelerating chemicals component, the rapid setting and harden of cement mortar can be made, generate compound that is stable and indissoluble with cement minerals effect, accelerate coherent structure and generate.Therefore, under drying or wet environment, big gun hole of the present invention is blocked up material and can rapid coagulation be hardened, and as final set within initial set within 1h, 2h, the concrete time is controlled.
(2) enough early strengths are impervious good
Material 5h ultimate compression strength is blocked up more than 5MPa in big gun hole of the present invention, this is because early strength water-reducing agent component can accelerate hydrated cementitious speed, promotes the development of cement mortar early strength.Therefore, can provide enough rigidity, anti-permeability performance is good.
(3) self microdilatancy, density is strong
At moist and underwater operation environment, material is blocked up in big gun hole of the present invention can produce appropriate volumetric expansion, to obtain the higher positive pressure of blockage body to big gun hole wall.This is because micro-expansion cement is a kind of hydraulic cementing materials of micro-expansibility, after aquation, self possess microdilatancy effect, and the particles filled effect of slag powders component can increase the degree of compactness of material.
(4) low aquation temperature rise
Explosive wire is all embedded in big gun hole, and its internal temperature should not higher than 60 DEG C, and therefore, suppose that hole environment temperature is 20 DEG C, then bridge material peak temperature rise is no more than 40 DEG C.In fact, non-tight adiabatic environment in hole, the heat of blockage body release can distribute at any time in air, does not reach the state of peak temperature rise.
Cement can cause temperature rise because of hydration heat, and adding of slag powders component can reduce cement consumption, reduces aquation temperature rise, and saves engineering cost.
(5) easy construction
For meeting constructing operation requirement, add water after stirring, bridge material is half slurry state, and cohesiveness is good.Especially in underground explosion, half slurry can insert horizontal big gun hole, meets blocking requirement.And mixing because of accelerating chemicals, bridge material mix loses flowability very soon, hardens completely within 2h, forms strong blockage body.
(6) asepsis environment-protecting
It is nonpoisonous and tasteless inorganic materials that material is blocked up in big gun hole of the present invention, health environment-friendly, is easy to construction, and easily obtains.
Embodiment
Below in conjunction with specific embodiment, the technical scheme in the present invention is described.
Embodiment 1
A compound method for material is blocked up in hydraulicity micro-expansion cement glue sandstone big gun hole, comprises the following steps:
(1) by weight ratio 70 parts of micro-expansion cements and 30 parts of slag powders, 1.2 parts of early strength water-reducing agents are added in agitator kettle, with 36 parts of water at normal temperatures low speed (speed that 140 ± 5r/min rotation and 62 ± 5r/min revolve round the sun) stir 30s, formed slurry;
(2) stirring at low speed adds 250 parts of sands after terminating in slurry;
(3) machine is gone at a high speed (285 ± 10r/min rotation and 125 ± 10r/min revolution) and stir 30s again;
(4) stop mixing 90s, in the 1st 15s with a rubber scraping by the material on blade and pot wall, scrape in the middle of pot.Continue to stir 60s under high speed (285 ± 10r/min rotation and 125 ± 10r/min revolution);
(5) before stirring terminates, add 7 parts of accelerating chemicalss in 15s, material is blocked up in obtained hydraulicity micro-expansion cement glue sandstone big gun hole.
Embodiment 2
A compound method for material is blocked up in hydraulicity micro-expansion cement glue sandstone big gun hole, comprises the following steps:
(1) by weight ratio 50 parts of micro-expansion cements and 50 parts of slag powders, 1.2 parts of early strength water-reducing agents are added in agitator kettle, with 30 parts of water at normal temperatures low speed (speed that 140 ± 5r/min rotation and 62 ± 5r/min revolve round the sun) stir 30s, formed slurry;
(2) stirring at low speed adds 250 parts of sands after terminating in slurry;
(3) machine is gone at a high speed (285 ± 10r/min rotation and 125 ± 10r/min revolution) and stir 35s again;
(4) stop mixing 90s, in the 1st 15s with a rubber scraping by the material on blade and pot wall, scrape in the middle of pot.Continue to stir 65s under high speed (285 ± 10r/min rotation and 125 ± 10r/min revolution).
(5) before stirring terminates, add 5 parts of accelerating chemicalss in 15s, material is blocked up in obtained hydraulicity micro-expansion cement glue sandstone big gun hole.
Embodiment 3
A compound method for material is blocked up in hydraulicity micro-expansion cement glue sandstone big gun hole, comprises the following steps:
(1) by weight ratio 80 parts of micro-expansion cements and 20 parts of slag powders, 1.2 parts of early strength water-reducing agents are added in agitator kettle, with 40 parts of water at normal temperatures low speed (speed that 140 ± 5r/min rotation and 62 ± 5r/min revolve round the sun) stir 30s, formed slurry;
(2) stirring at low speed terminates in slurry, to add 300 parts of sands after rear stirring at low speed terminates;
(3) machine is gone to high speed and stir 35s again.
(4) stop mixing 90s, in the 1st 15s with a rubber scraping by the material on blade and pot wall, scrape in the middle of pot.Continue to stir 65s under high speed (285 ± 10r/min rotation and 125 ± 10r/min revolution);
(5) before stirring terminates, add 5 parts of accelerating chemicalss in 15s, material is blocked up in obtained hydraulicity micro-expansion cement glue sandstone big gun hole.
Embodiment 4
A preparation method for material is blocked up in hydraulicity micro-expansion cement glue sandstone big gun hole, comprises the following steps:
(1) by weight ratio 70 parts of micro-expansion cements and 30 parts of slag powders, 1.2 parts of early strength water-reducing agents are added in agitator kettle, with 36 parts of water at normal temperatures low speed (speed that 140 ± 5r/min rotation and 62 ± 5r/min revolve round the sun) stir 30s, formed slurry;
(2) stirring at low speed adds 250 parts of sands after terminating in slurry;
(3) machine is gone at a high speed (285 ± 10r/min rotation and 125 ± 10r/min revolution) and stir 30s again;
(4) stop mixing 90s, in the 1st 15s with a rubber scraping by the material on blade and pot wall, scrape in the middle of pot.Continue to stir 60s under high speed (285 ± 10r/min rotation and 125 ± 10r/min revolution).
(5) before stirring terminates, add 2.5 parts of accelerating chemicalss in 15s, material is blocked up in obtained hydraulicity micro-expansion cement glue sandstone big gun hole.
In above-described embodiment, described micro-expansion cement is seif-citing rate silicate cement or seif-citing rate aluminate cement or expansion aluminosulfate cement.
Seif-citing rate silicate cement: be called seif-citing rate silicate cement with the expansile hydraulic cementing materials that the silicate cement of suitable proportion or ordinary Portland cement, high-alumina cement and natural dihydrate gypsum grind.
Seif-citing rate aluminate cement: seif-citing rate aluminate cement is the large rate of expansion gelling material with a certain amount of high aluminium cement clinker and dihydrate gypsum grinding.3.0,4.5 and 6.0 three ranks are divided into by 1:2 standard mortar 28d self-stress value.
Expansion aluminosulfate cement: all with the raw material of proper composition, through calcining be able to anhydrous calcium sulphoaluminate and Dicalcium Phosphate (Feed Grade) is the grog of main mineral constituent, add the levigate hydraulic cementing materials with adjustable expanding performance made of appropriate dihydrate gypsum, be called expansion aluminosulfate cement.
Early strength water-reducing agent can adopt how serial powdery water-reducing agent, concrete, adopts Jiangsu Botexin Materials Co., Ltd to produce
type (super hardening) concrete high-efficiency toughener, has large diminishing (water-reducing rate reaches 18 ~ 22%) and high early strong (1d can improve concrete strength 110 ~ 230%, 3d and can improve 60 ~ 130%, 7d and can improve 50 ~ 90%.) feature;
Accelerating chemicals adopts Jiangsu Botexin Materials Co., Ltd to produce
liquid accelerator, main component is Na [Al (OH)]
4, solid content 50%, significantly can accelerate sand-cement slurry or concrete setting and harden;
The hydraulicity micro-expansion cement glue sandstone big gun hole obtained to above-described embodiment is blocked up after material tests, and obtains test result shown in following table:
Material the performance test results is blocked up in table 1 hydraulicity micro-expansion cement glue sandstone big gun hole
The above; be only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, anyly belongs to those skilled in the art in the technical scope that the present invention discloses; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim.
Claims (2)
1. a compound method for material is blocked up in hydraulicity micro-expansion cement glue sandstone big gun hole, it is characterized in that comprising the steps:
(1) by weight ratio 50 ~ 80 parts of micro-expansion cements and 20 ~ 50 parts of slag powders, 1.0 ~ 1.2 parts of early strength water-reducing agents are added in agitator kettle, with 30 ~ 40 parts of water at normal temperatures with the speed that 140 ± 5r/min rotation and 62 ± 5r/min revolve round the sun, stirring at low speed 30 ± 5s, forms slurry;
(2) stirring at low speed adds 250 ~ 300 parts of sands after terminating in slurry;
(3) with the speed that 285 ± 10r/min rotation and 125 ± 10r/min revolve round the sun, high-speed stirring 30 ± 5s;
(4) stop mixing 90s, with a rubber scraping, the material on blade and pot wall is scraped in the middle of pot in the 1st 15s, then continue the speed with 285 ± 10r/min rotation and 125 ± 10r/min revolution, high-speed stirring 60 ± 5s;
(5) before stirring terminates, in 15s, add 2.5 ~ 7 parts of accelerating chemicalss, hydraulicity micro-expansion cement glue sandstone big gun hole can be obtained and block up material.
2. the compound method of material is blocked up in hydraulicity micro-expansion cement glue sandstone big gun hole as claimed in claim 1, it is characterized in that: described micro-expansion cement is seif-citing rate silicate cement or seif-citing rate aluminate cement or expansion aluminosulfate cement.
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| CN104692727B (en) * | 2015-02-13 | 2016-08-31 | 中国长江三峡集团公司 | A kind of blast hole blocking gelling material possessing the micro-swollen characteristic of quick setting early strength |
| CN106478014A (en) * | 2016-09-28 | 2017-03-08 | 贵州大学 | Special stemming and preparation method are removed in a kind of structure demolition |
| CN114353610B (en) * | 2021-12-21 | 2023-04-25 | 湖北工业大学 | Structure and construction method for sectional charging in horizontal or gently inclined blind blasthole |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318802A (en) * | 2008-07-04 | 2008-12-10 | 武汉理工大学 | Hole sealing agent for seismic exploration and method of manufacturing the same |
| CN101538136A (en) * | 2009-04-29 | 2009-09-23 | 华南理工大学 | Premixing mortar with high moisture retention and production method thereof |
| CN103086673A (en) * | 2011-11-01 | 2013-05-08 | 梁开华 | Soundless cracking agent composition |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101318802A (en) * | 2008-07-04 | 2008-12-10 | 武汉理工大学 | Hole sealing agent for seismic exploration and method of manufacturing the same |
| CN101538136A (en) * | 2009-04-29 | 2009-09-23 | 华南理工大学 | Premixing mortar with high moisture retention and production method thereof |
| CN103086673A (en) * | 2011-11-01 | 2013-05-08 | 梁开华 | Soundless cracking agent composition |
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Inventor after: Yang Huaquan Inventor after: Xiao Kaitao Inventor after: Lu Jian Inventor after: Lin Yuqiang Inventor after: Chen Xia Inventor after: Li Xiang Inventor after: Zhang Liang Inventor after: Wang Lei Inventor after: Gao Zhiyang Inventor after: Zhang Jianfeng Inventor after: Ruan Bo Inventor after: Wang Shuyin Inventor after: Huang Li Inventor after: Li Jiazheng Inventor after: Shi Yan Inventor after: Dong Yun Inventor after: Yan Jianjun Inventor after: Peng Shangshi Inventor after: Wu Xinxia Inventor after: Zhou Shihua Inventor before: Yang Huaquan Inventor before: Xiao Kaitao Inventor before: Lin Yuqiang Inventor before: Chen Xia Inventor before: Li Xiang Inventor before: Zhang Liang Inventor before: Wang Lei Inventor before: Gao Zhiyang Inventor before: Zhang Jianfeng Inventor before: Ruan Bo Inventor before: Huang Li Inventor before: Wang Shuyin Inventor before: Li Jiazheng Inventor before: Shi Yan Inventor before: Dong Yun Inventor before: Yan Jianjun Inventor before: Peng Shangshi Inventor before: Wu Xinxia Inventor before: Zhou Shihua |
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Granted publication date: 20150114 Termination date: 20170729 |