CN102584089A - Formula for enhanced accelerating agent - Google Patents
Formula for enhanced accelerating agent Download PDFInfo
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- CN102584089A CN102584089A CN2012100540867A CN201210054086A CN102584089A CN 102584089 A CN102584089 A CN 102584089A CN 2012100540867 A CN2012100540867 A CN 2012100540867A CN 201210054086 A CN201210054086 A CN 201210054086A CN 102584089 A CN102584089 A CN 102584089A
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- accelerating chemicals
- accelerating agent
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- sprayed concrete
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Abstract
The invention discloses a formula for an enhanced accelerating agent. The formula is characterized in that the accelerating agent comprises the following components by weight percent: 20-30% of aluminum oxide clinker, 50-80% of active metakaolin, 10-50% of calcined lime and 1-5% of organic colloid. By using the enhanced accelerating agent prepared according to the technical scheme provided by the invention, the strength of the sprayed concrete is 30-40% higher than the strength of the sprayed concrete using the common accelerating agent and is 10-20% higher than the strength of the common concrete (poured concrete according to the same formula) without adding the accelerating agent, and C30 and C40 size sprayed concrete can be prepared.
Description
Technical field
The present invention relates to a kind of prescription of enhancement type accelerating chemicals, this accelerating chemicals is mainly used in construction of shotcrete.
Background technology
Sprayed concrete is the concrete that utilizes the injection method construction.The advantage of shotcrete construction method is that speed of application is fast; Require low to working-yard environment (ground flat degree, crag shape etc.); So this constructional method is often used the fields such as Slope Treatment at roadway support, subway supporting, tunnel and culvert supporting, railway and the highway in the operation of speedily carrying out rescue work, mine.The concrete that is injected on the crag must lose flowability very soon, otherwise will come off because of flowing, so, must in the sprayed concrete prescription, add " accelerating chemicals ".
The kind of accelerating chemicals is a lot, with the closely-related accelerating chemicals of the present invention be sodium metaaluminate class accelerating chemicals.It mainly is made up of aluminum oxide clinker and blended material.The use of domestic and international existing accelerating chemicals all can reduce the intensity of sprayed concrete.
At present, the accelerating chemicals prescription that is mainly used in sprayed concrete mainly contains following two kinds: a kind of is that the prescription of common accelerating chemicals is: aluminum oxide clinker (sodium metaaluminate): unslaked lime=4:6～6:4.
The shortcoming of this prior art one has two:
The first, reduced the intensity of sprayed concrete, with the concrete of the same prescription that does not add accelerating chemicals relatively, intensity reduces by 30%～50%.
The second, the alkalescence of unslaked lime and sodium metaaluminate is very strong, and in sprayed construction, dust is very strong to the corrodibility and the pungency of workmen's skin, particularly eyes, influences constructing operation and the workman is healthy.
The 3rd, cost is higher relatively.
The 4th, spray rebound degree than higher.
The prescription of another kind of modified version accelerating chemicals is: aluminum oxide clinker (sodium metaaluminate): boiling furnace slag or flyash=4～5:6～5.
The main drawback of this prior art two is:
This technology has reduced the cost of manufacture of accelerating chemicals, moderate reduction the alkalescence of accelerating chemicals, but still do not change the influence of accelerating chemicals to sprayed concrete strength.So the main drawback of this prescription has 2:
The first, reduced the intensity of sprayed concrete, with the concrete of the same prescription that does not add accelerating chemicals relatively, intensity reduces by 30%～50%.
The second, spray rebound degree than higher.
Summary of the invention
Technical problem to be solved by this invention provides a kind of influence that reduces accelerating chemicals to sprayed concrete strength, even improves the intensity of sprayed concrete; And reduce the enhancement type accelerating chemicals of the injection rebound degree of sprayed concrete.
In order to solve the problems of the technologies described above; The present invention provides a kind of prescription of enhancement type accelerating chemicals; It is characterized in that; This accelerating chemicals comprises following component: aluminum oxide clinker 20～30%, high-activity metakaolin 50～80%, unslaked lime 10～50%, organic colloid 1～5%, above-mentioned per-cent are mass percent.
Further, described organic colloid is a polymer dispersion powder.
Beneficial effect of the present invention is:
1, the enhancement type accelerating chemicals of technical scheme preparation of the present invention can make sprayed concrete strength improve 30～40% than the sprayed concrete strength that uses common accelerating chemicals to make; Improve 10～20%% than the normal concrete that does not add accelerating chemicals (with the casting concrete of prescription) intensity, can prepare the sprayed concrete of C30 and C40 label.
2, under equal operational condition; (it is very big that the injection rebound degree is influenced by operation factors than the injection rebound degree reduction by 5～10% of the sprayed concrete of existing accelerating chemicals preparation for the injection rebound degree that the accelerating chemicals of technical scheme of the present invention preparation can make sprayed concrete; So, be difficult to provide a concrete numerical value, still; As long as operational condition is identical, new technology just can reduce about 5～10% than the injection rebound degree of prior art).
3. the enhancement type accelerating chemicals of technical scheme preparation of the present invention is compared with common accelerating chemicals, and the alkalescence of dust is very low, and is less to workmen's Health hazard.
4. the enhancement type accelerating chemicals of technical scheme preparation of the present invention can make the weather resistance of sprayed concrete significantly improve.
Below in conjunction with specific embodiment the present invention is described in further detail.
Embodiment
The present invention provides a kind of enhancement type accelerating chemicals prescription to be: aluminum oxide clinker (sodium metaaluminate) 20～30%, and high-activity metakaolin 50～80%, unslaked lime 10～50%, organic colloids such as polymer dispersion powder 1～5%, above-mentioned per-cent are mass percent.
The calcium hydroxide reaction that this technological enhanced mechanism produces when being aluminium sesquioxide and silicon-dioxide and the hydrated cementitious in the high-activity metakaolin generates cement stone ore things such as hydrated calcium silicate and drated calcium aluminate, the intensity of raising sprayed concrete; Simultaneously, the active aluminium sesquioxide in the highly efficient intensifying agent can in the alkalescence of accelerating chemicals, alleviating the disadvantageous effect of accelerating chemicals alkalescence to sprayed concrete strength.
The mechanism of this technology reduction rebound degree is that the high-activity metakaolin in the enhancement type accelerating chemicals is tiny platy shaped particle, and the viscosity of sprayed concrete is increased, thereby reduces the quantity of jetting material reflection resilience; Simultaneously, the cohesiveness of organic colloids such as polymer dispersion powder plays and reduces the effect of spraying rebound degree.
Embodiment 1
Enhancement type accelerating chemicals prescription provided by the invention is: aluminum oxide clinker 20%, high-activity metakaolin 50%, unslaked lime 25%, polymer dispersion powder 5%, above-mentioned per-cent are mass percent.
Embodiment 2
Enhancement type accelerating chemicals prescription provided by the invention is: aluminum oxide clinker 25%, high-activity metakaolin 60%, unslaked lime 10%, polymer dispersion powder 5%, above-mentioned per-cent are mass percent.
Embodiment 3
Enhancement type accelerating chemicals prescription provided by the invention is: aluminum oxide clinker 30%, high-activity metakaolin 54%, unslaked lime 15%, polymer dispersion powder 1%, above-mentioned per-cent are mass percent.
Embodiment 4
Enhancement type accelerating chemicals prescription provided by the invention is: aluminum oxide clinker 20%, high-activity metakaolin 50%, unslaked lime 29%, polymer dispersion powder 1%, above-mentioned per-cent are mass percent.
Embodiment 5
Enhancement type accelerating chemicals prescription provided by the invention is: aluminum oxide clinker 10%, high-activity metakaolin 80%, unslaked lime 9%, polymer dispersion powder 1%, above-mentioned per-cent are mass percent.
Embodiment 6
Enhancement type accelerating chemicals prescription provided by the invention is: aluminum oxide clinker 9%, high-activity metakaolin 40%, unslaked lime 50%, polymer dispersion powder 1%, above-mentioned per-cent are mass percent.
Protection domain of the present invention is not limited to the foregoing description, and every technological conspicuous technology distortion of doing according to know-why of the present invention all falls within protection scope of the present invention.
Claims (2)
1. the prescription of an enhancement type accelerating chemicals is characterized in that, this accelerating chemicals comprises following component: aluminum oxide clinker 20～30%, high-activity metakaolin 50～80%, unslaked lime 10～50%, organic colloid 1～5%, above-mentioned per-cent are mass percent.
2. the prescription of enhancement type accelerating chemicals according to claim 1 is characterized in that, described organic colloid is a polymer dispersion powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100540867A CN102584089A (en) | 2012-03-05 | 2012-03-05 | Formula for enhanced accelerating agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100540867A CN102584089A (en) | 2012-03-05 | 2012-03-05 | Formula for enhanced accelerating agent |
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|---|---|
| CN102584089A true CN102584089A (en) | 2012-07-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN2012100540867A Pending CN102584089A (en) | 2012-03-05 | 2012-03-05 | Formula for enhanced accelerating agent |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103880321A (en) * | 2014-02-09 | 2014-06-25 | 黄小仙 | Method for preparing cementing material mix of taking alumina clinker as primary raw material |
| CN104891846A (en) * | 2015-05-22 | 2015-09-09 | 徐州中矿大贝克福尔科技股份有限公司 | Special accelerator for coal gangue-based sprayed concrete |
| CN105174787A (en) * | 2015-09-24 | 2015-12-23 | 滁州京安工贸有限责任公司 | Concrete and mortar accelerator |
| CN105272012A (en) * | 2015-11-02 | 2016-01-27 | 成都理工大学 | Concrete for high-ground stress and high-ground temperature tunnel excavation primary support |
Citations (3)
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| CN1900002A (en) * | 2006-07-20 | 2007-01-24 | 谭允祯 | Low resilient rate high strength spray concrete additive |
| CN101973722A (en) * | 2010-09-15 | 2011-02-16 | 山西科腾环保科技有限公司 | Accelerating agent and preparation method thereof |
| CN102219433A (en) * | 2011-05-04 | 2011-10-19 | 山西潞安环保能源开发股份有限公司 | Low-resilience high-strength sprayed concrete liquid accelerating agent and preparation method thereof |
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2012
- 2012-03-05 CN CN2012100540867A patent/CN102584089A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1900002A (en) * | 2006-07-20 | 2007-01-24 | 谭允祯 | Low resilient rate high strength spray concrete additive |
| CN101973722A (en) * | 2010-09-15 | 2011-02-16 | 山西科腾环保科技有限公司 | Accelerating agent and preparation method thereof |
| CN102219433A (en) * | 2011-05-04 | 2011-10-19 | 山西潞安环保能源开发股份有限公司 | Low-resilience high-strength sprayed concrete liquid accelerating agent and preparation method thereof |
Non-Patent Citations (1)
| Title |
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| 徐永红: "偏高岭土在煤矿喷射混凝土中的应用研究", 《中国优秀硕士学论文电子期刊网 工程科技Ⅱ辑》 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103880321A (en) * | 2014-02-09 | 2014-06-25 | 黄小仙 | Method for preparing cementing material mix of taking alumina clinker as primary raw material |
| CN104773966A (en) * | 2014-02-09 | 2015-07-15 | 黄小仙 | Preparation method of binding material mix |
| CN103880321B (en) * | 2014-02-09 | 2016-01-20 | 河南中州路桥建设有限公司 | A kind of take aluminum oxide clinker as the preparation method of the gelling material mixed material of main raw material |
| CN104773966B (en) * | 2014-02-09 | 2017-02-22 | 南通科达建材股份有限公司 | Preparation method of binding material mix |
| CN104891846A (en) * | 2015-05-22 | 2015-09-09 | 徐州中矿大贝克福尔科技股份有限公司 | Special accelerator for coal gangue-based sprayed concrete |
| CN105174787A (en) * | 2015-09-24 | 2015-12-23 | 滁州京安工贸有限责任公司 | Concrete and mortar accelerator |
| CN105174787B (en) * | 2015-09-24 | 2017-11-17 | 滁州京安工贸有限责任公司 | A kind of concrete and mortar accelerator |
| CN105272012A (en) * | 2015-11-02 | 2016-01-27 | 成都理工大学 | Concrete for high-ground stress and high-ground temperature tunnel excavation primary support |
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Application publication date: 20120718 |