CN1566012A - Anchoring cement - Google Patents
Anchoring cement Download PDFInfo
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- CN1566012A CN1566012A CN 03134376 CN03134376A CN1566012A CN 1566012 A CN1566012 A CN 1566012A CN 03134376 CN03134376 CN 03134376 CN 03134376 A CN03134376 A CN 03134376A CN 1566012 A CN1566012 A CN 1566012A
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Abstract
The invention discloses an anchoring cement, which is prepared from ferrum aluminates as principal raw material as well as lime stone, anhydrous gypsum, calcium chloride as hydrating promoter, methylcellulose propylene glycol ether as organic polymer through grinding by a ball mill. The invention solves the problem of weak resistance to abrasion of the present supporting materials.
Description
Technical field
The invention belongs to a kind of cement building material.
Technical background
Railway, highway, tunnel, mine well base and underground works complexity, special in the tunnel in mining area since adopt dark, tectonic structure is complicated, existing support material resistance to corrosion is poor, support strength reduces gradually, accident potential lies dormant.For life and the national wealth safety that ensures the miner, develop and apply the bolt supporting supporting technology and seem very necessary, wherein develop the high strength anchor bar support material and be the key point in the Application and Development bolt supporting supporting technology.
The high strength anchor bar support material mainly contains mining steel band, anchor pole, anchoring cement etc.At present the anchoring cement that uses of user mainly is based on ordinary Portland cement, mixes multiple admixture outward and mix.In whipping process because each composition is difficult to mix, influence anchoring cement quality, coagulate soon, early by force, its excellent properties can't be guaranteed.Chinese patent discloses a kind of " special anchoring cement " (patent No.: 94111661.1), have fast coagulate, characteristics such as strong, fast hard early.But owing to have sulfate resistance, the reason of anti-double salt erosional competency difference, thereby influenced anchoring effect and weather resistance, cause the generation of shortcomings such as quality instability.
Summary of the invention
At the deficiency of the said products, it is reliable to the objective of the invention is to develop a kind of steady quality, the intensity height, and time of coagulation is controlled, and anti-permeability performance is good, and double salt erosional competencyes such as sulfuric-resisting are strong, are convenient to the novel anchoring cement of large-scale production.
The object of the present invention is achieved like this
A kind of anchoring cement is after Walocel MT 20.000PV by the calcium chloride of the dehydrated gyp-of the Wingdale of the ferro-aluminate cement grog of content 65-87%, 5-10%, 5-10%, 3-10%, 1-5% mixes, to form through the ball mill grinding.
Wherein, the high-quality ferro-aluminate cement grog that the ferro-aluminate cement grog adopts Jingtai, Gansu Province scape to produce along special cement factory, this cement have and advantage such as coagulate, strong, microdilatancy early, resistance to cleavage be good, and erosion resistance is strong soon;
Wingdale adopts Jingtai, Gansu Province scape to produce the raw material of Portland cement along special cement factory;
Dehydrated gyp-adopts the raw material of Jingtai, Gansu Province scape along the ferro-aluminate cement of special cement factory production, requires SO
3Content is greater than 38%;
Calcium chloride can promote time of coagulation of ferro-aluminate cement, accelerates hydrated cementitious, improves the early strength of cement.
Walocel MT 20.000PV is a kind of organic polymer, can improve the anchor force of cohesive strength, anti-shearing force and the anchor pole of cement.
A large amount of anhydrous calciumsulphate (3CaO3Al is arranged in the ferro-aluminate cement grog in the anchoring cement
2O
3CaSO
4) be the main mine phase of ferro-aluminate cement, in anchoring cement, play the backbone effect.Utilize its high-early-strength, microdilatancy characteristics to make antiseepage, leak stopping anchoring cement.The basicity of anchoring cement is more much lower than the basicity in the silicate cement, studies show that, anhydrous calciumsulphate is a big sosoloid, along with solid solution ionic difference, can develop the special cement with property.
Mineral anhydrous calciumsulphate in the anchoring cement is under the effect of aquation promotor, and fast hydration generates the C-S-H structure, and absorb a large amount of moisture, in losing the space of water, the crystalline of C-S-H forms in a large number, interlaced, form hard skeleton and produced early strength.Along with the aquation of anhydrous calcium sulphoaluminate, driven the aquation of other mineral such as Dicalcium Phosphate (Feed Grade), for the growth of the later strength of cement provides condition.
The present invention compared with prior art, the advantage that has and the beneficial effect of generation are
1, anchoring cement is a kind of complex cement of giving full play to the characteristic of each composition.Great number tested data shows: cement has the presetting period less than 5min, final setting time is less than 10min, 0.5 hour ultimate compression strength surpass 12Mpa, ultimate compression strength surpassed 22Mpa in 1 hour, the middle and later periods gain in strength is stable, and every performance of cement all reaches MT219-90 " cement grouted bolt rolling anchoring agent " standard-required;
2, the resistance to corrosion of anchoring cement is strong.Because ferro-aluminate cement has the effect of anti-permeability performance, sulfate resistance, anti-double salt, solved the problem of current support material anti-corrosion capability difference, in tunnel, mine working, show great practicality;
3, anchoring cement is a kind of novel support engineering material, with regard to its technology and starting material, can utilize former cement production enterprise equipment, need not increase under the situation of extra mechanical devices, can carry out scale production.Compare with Portland cement, input and output is more remarkable than particularly, can obtain considerable economy return;
4, raw material abundance, easy construction, market is widely used.
Embodiment
Embodiment 1, and a kind of anchoring cement is after being mixed by 81% ferro-aluminate cement grog, 7% Wingdale, 6% dehydrated gyp-, 5% calcium chloride, 1% Walocel MT 20.000PV, a kind of complex cement that forms through the ball mill grinding.
(1) time of coagulation
Test apparatus adopts the instrument and the utensil of defined among the GB1346 " cement normal consistency water consumption, time of coagulation, the stability method of inspection ".
The 300g anchoring cement poured into mix and stir in the pot, add the 90g tap water, stir rapidly, and put into round mould immediately, vibration scrapes off unnecessary thick slurry for several times, and after drying, the mensuration presetting period is 1min, and final setting time is 2min;
(2) ultimate compression strength
Test method with reference to MT219-90 " cement grouted bolt rolling anchoring agent ", anchoring cement 2000g poured into mix and stir in the pot, add 600g water, stir rapidly, pour 4 * 4 * 16cm cement mortar specimen immediately into, with tamper compacting 20 times, and die trial shaken 15 times on the ground, the demoulding behind the 5min, 20 ℃ of maintaining box envrionment temperatures, relative humidity is to carry out maintenance under 75% condition, and carries out ultimate compression strength in the following length of time and detect, 0.5 hour ultimate compression strength be 13.5Mpa, 1 hour ultimate compression strength is 22.2Mpa.
(3) anchor force
With reference to the test method of MT219-90 " cement grouted bolt, rolling anchoring agent ", 0.5 hour measures anchor force is 85.4KN.
(4) expansion character
Anchoring cement is carried out with JC313 " expansive cement swelling rate test method ", and the examination system is done back 15min form removal survey and is read radix, measures the length in each length of time then, calculates rate of expansion.0.5 hour rate of expansion is that 0.029%, 1 hour rate of expansion is 0.041%.
Embodiment 2, and a kind of anchoring cement is after being mixed by 72% ferro-aluminate cement grog, 10% Wingdale, 10% dehydrated gyp-, 3% calcium chloride, 5% Walocel MT 20.000PV, to form through the ball mill grinding.
Its test method, instrument and utensil and embodiment 1 are together.
Measure by test:
(1) presetting period 4min, final setting time 8min.
(2) ultimate compression strength 0.5 hour was 10.2MPa, and 1 hour is 18.8Mpa.
(3) anchor force is 74KN
(4) rate of expansion 0.5 hour be 0.029%, 1 hour be 0.041%.
Claims (1)
1, a kind of anchoring cement, contain:
Ferro-aluminate cement grog 65-87%
Wingdale 4-10%
Dehydrated gyp-5-10%
Calcium chloride 3-10%
Walocel MT 20.000PV 1-5%
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03134376 CN1235824C (en) | 2003-06-13 | 2003-06-13 | Anchoring cement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03134376 CN1235824C (en) | 2003-06-13 | 2003-06-13 | Anchoring cement |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1566012A true CN1566012A (en) | 2005-01-19 |
| CN1235824C CN1235824C (en) | 2006-01-11 |
Family
ID=34470178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03134376 Expired - Fee Related CN1235824C (en) | 2003-06-13 | 2003-06-13 | Anchoring cement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1235824C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941828A (en) * | 2010-08-31 | 2011-01-12 | 中铁四局集团有限公司 | Slurry curing agent |
| CN108033752A (en) * | 2017-12-12 | 2018-05-15 | 甘肃智通科技工程检测咨询有限公司 | A kind of superpower compound Anchor Agent |
-
2003
- 2003-06-13 CN CN 03134376 patent/CN1235824C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941828A (en) * | 2010-08-31 | 2011-01-12 | 中铁四局集团有限公司 | Slurry curing agent |
| CN101941828B (en) * | 2010-08-31 | 2014-02-12 | 中铁四局集团有限公司 | Slurry curing agent |
| CN108033752A (en) * | 2017-12-12 | 2018-05-15 | 甘肃智通科技工程检测咨询有限公司 | A kind of superpower compound Anchor Agent |
| CN108033752B (en) * | 2017-12-12 | 2020-07-28 | 甘肃智通科技工程检测咨询有限公司 | Superstrong composite anchoring agent |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1235824C (en) | 2006-01-11 |
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