CN1699251A - Retardation method for alkali-activated-carbonate/slag gel material - Google Patents
Retardation method for alkali-activated-carbonate/slag gel material Download PDFInfo
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- CN1699251A CN1699251A CNA2005100343962A CN200510034396A CN1699251A CN 1699251 A CN1699251 A CN 1699251A CN A2005100343962 A CNA2005100343962 A CN A2005100343962A CN 200510034396 A CN200510034396 A CN 200510034396A CN 1699251 A CN1699251 A CN 1699251A
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention provides a retardation method for alkali-activated-carbonate/slag gel material which comprises, at normal temperature, calculated by mass portions, dissolving 4-10 portions of barium chloride or barium nitrate into 100 portions of water, thus obtaining retarder solution, then charging 200-300 parts of slag powder, agitating homogeneously, charging in turn 220-3100 parts of exciting agent, 200-3800 parts of marginal carbonate powdered ore, agitating homogeneously, finally obtaining the end product.
Description
Technical field
The present invention relates to building material technical field, be specifically related to a kind of retardation method of alkali-activated-carbonate-slag gel material.
Background technology
Alkali-activated-carbonate-slag gel material is a novel green gelling material of utilizing natural marginality carbonate mine, blast-furnace slag and sodium silicate solution directly to obtain at normal temperatures.It is deficiencies such as density at alkali-activated-carbonate gelling material hardenite is not enough, later strength is on the low side, on the basis of alkali-activated-carbonate gelling material, the by product of admixture part Iron industry---blast furnace slag and a kind of gelling material of growing up.So-called marginality carbonate mine be meant its CaO mass percentage content less than 45% and the MgO mass percentage content be 6%～20%, at silicate cement industry and all unworkable carbonatite of metallurgical industry, belong to natural waste resource.The CaO mass percentage content is greater than 45% in the silicate cement industrial requirements carbonate mine, and metallurgical industry requires MgO mass percentage content 〉=20% in the carbonate mine.Compare with traditional gelling material, this gelling material can be utilized marginality carbonate mine and blast-furnace slag in a large number, has expanded the raw material resources that gelling material is produced, and utilizes for reintegrating of natural and secondary resource and has opened up a new way; On the other hand, it is preparation under the normal temperature, and energy consumption and cost are low, and environmental pollution is little.Wherein, the part blast-furnace slag of admixture can significantly improve intensity, the anti-permeability performance of alkali-activated-carbonate gelling material, and can suppress wherein poisonous and harmful ionic stripping, but can cause its gel time (time that slurry loses flowability) sharply to shorten.This mainly is that initial reaction stage has generated due to a large amount of gelling products because blast-furnace slag speed of response under the exciting of this strongly basic medium of sodium silicate solution increases substantially.Behind the admixture blast-furnace slag, it is big that the viscosity of alkali-activated-carbonate-slag gel material becomes, mobile variation, and gel time shortens significantly.The mass percent that substitutes carbonate mine when slag reaches 10% when above, and the gel time of alkali-activated-carbonate-slag gel material is less than 1h, and the requirement that is not suitable for constructing is difficult to be applied on actual engineering.Therefore, solving the rapid hardening problem of alkali-activated-carbonate-slag gel material, is that alkali-activated-carbonate-slag gel material is realized engineering key in application place.
Existing research data shows, is the alkali slag cement of alkaline constituents with the alkalimetal silicate, and its retardation method mainly contains technological measure and admixture slow setting admixtures such as scoriaceous thermal pretreatment, the adjustment of concrete mixing time and concrete secondary stirring.Evidence, these technological measures can not prolong the gel time of alkali-activated-carbonate-slag gel material effectively; And the use of admixtures such as oxysuccinic acid, calcium hydroxide, phosphoric acid, sodium phosphate, yellow soda ash makes the gel time of alkali-activated-carbonate-slag gel material shorten on the contrary; Sucrose is to the not significantly influence of gel time of alkali-activated-carbonate/slag gel material; The use of admixtures such as zinc nitrate, lead nitrate, nitrocalcite, sodium-chlor only can make the gel time of alkali-activated-carbonate-slag gel material slightly prolong; Though the use of sodium tetraborate can prolong the gel time of alkali-activated-carbonate-slag gel material greatly, the consumption of sodium tetraborate is too big, accounts for slag quality about 12%, and has reduced the flowing property of gelling material simultaneously significantly.Above-mentioned is the retardation method of the alkali slag cement of alkaline constituents with the alkalimetal silicate, and is not suitable for the reason of alkali-activated-carbonate-slag gel material, is that the two alkaline constituents consumption difference is bigger.Generally speaking, be in the alkali slag cement of alkaline constituents with the alkalimetal silicate, it is 4%～8% that the sodium oxide that is provided by alkaline constituents accounts for scoriaceous mass percent; And in alkali-activated-carbonate-slag gel material, the mass percent that the sodium oxide that is provided by alkaline constituents accounts for solid fines (slag powders+carbonate breeze) is 10%～15%, accounts for scoriaceous mass percent more than 20%.Therefore study the slow setting technology that the gel time that can effectively prolong alkali-activated-carbonate-slag gel material can not reduce its flowing property again, for realizing that its engineering application is significant.
Summary of the invention
The objective of the invention is to overcome shortcoming of the prior art with not enough, a kind of alkali-activated-carbonate-slag gel material retardation method that can prolong gel time effectively is provided.
Purpose of the present invention is achieved through the following technical solutions: the retardation method of this alkali-activated-carbonate-slag gel material, and its processing step comprises:
The first step at normal temperatures, in mass fraction, is dissolved in 4～10 parts of bariumchlorides or nitrate of baryta in 100 parts of water, is mixed with retardant solution, adds 200～300 parts of slag powders then, stirs;
Second step added 220～3100 parts of exciting agents, 200～3800 parts of marginality carbonate breezes successively, continued to stir, and promptly made alkali-activated-carbonate-slag gel material.
Described exciting agent is that modulus is 1.4～1.8 sodium silicate solution, and its sodium oxide and siliconoxide mass percentage concentration sum are 35～55%; Described slag is a blast furnace slag; Described marginality carbonate mine is that the CaO mass percentage content is 30%～45%, the MgO mass percentage content is 6～20% carbonatite; The fineness of described marginality carbonate breeze and blast furnace slag powder reaches the fineness control requirement of GB/T 1345-1991 " the cement fineness method of inspection (80 μ m sieve sieve formula) " to ordinary Portland cement.
Principle of work of the present invention is: the aqueous solution and the slag powders of admixture bariumchloride or nitrate of baryta are stirred to evenly in advance, and the surface is electronegative when utilizing slag particle in water, makes barium ion be adsorbed on the surface of slag particle; Be adsorbed on the silicate ion reaction in the exciting agent of the barium ion on slag particle surface and follow-up adding, form the silicate thin film of insoluble, be deposited on the surface of slag particle, constitute comparatively fine and close integument, stoped direct contact the between slag powders and the exciting agent.The silicate thin film of this insoluble has semipermeability, owing to exist phenomenon of osmosis, the OH in the exciting agent of film outside
-Ion and H
2The O molecule constantly sees through film and enters inside the film, the OH that the slag particle of film the inside is come in infiltration
-Ion and H
2Under the effect of O molecule, vitreous structure disintegrates, and reaction forms hydrated product and volumetric expansion, after reaching certain pressure, film promptly breaks, and exciting agent directly contacts with slag particle, hydration reaction carries out fast, causes gelling material slurries generation gelation, sclerosis, generation intensity.Therefore, before integument broke, the reaction between slag and the exciting agent was weakened greatly, thereby made that the gel time of alkali-activated-carbonate-slag gel material is prolonged significantly.
The present invention has advantage and effect under following with respect to prior art:
(1) easy to use.Processing step of the present invention is simple, does not need slurry storehouse, can be now with the current.
(2) slow setting efficient height.By adjusting the consumption of admixture, can prolong the gel time of alkali-activated-carbonate-slag gel material effectively, and make gel time adjustable at 1～12 hour.
(3) slurry can the long period keep good flowing property.In several hours after the slurry preparation, the flowing property of alkali-activated-carbonate-slag gel material slurry is loss not, even also improves to some extent, and this is very favourable to construction.
(4) adaptability is strong.Different alkali-activated-carbonate-the slag gel material of modulus, mass percent concentration and fine slag contents that is suitable for exciting agent.
Embodiment
Below in conjunction with embodiment the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment 1
The implementation procedure of the retardation method of this alkali-activated-carbonate-slag gel material is:
In mass fraction, at normal temperatures, 10 parts of bariumchlorides are dissolved in 100 parts of water are mixed with retardant solution, again 280 parts of blast furnace slag powder are added wherein, stir; Add 360 parts of moduluses then and be 1.4, sodium oxide and siliconoxide mass percentage concentration sum are 45% exciting agent, add 280 parts of marginality carbonate breezes simultaneously, continue to stir, and promptly make alkali-activated-carbonate-slag gel material.
The gel time of this alkali-activated-carbonate-slag gel material is 6h54min.According to GB8077-2000 " Methods for testing uniformity of concrete admixture ", adopt clean slurry degree of mobilization to characterize the flowing property of slurry, the time dependent result of clean slurry degree of mobilization of this alkali-activated-carbonate-slag gel material is as follows: be 222mm during 10min, during 1h 238mm, being 253mm during 2h, is 260mm during 3h, is 255mm during 4h, being 255mm during 5h, is 190mm during 6h.
Embodiment 2
The implementation procedure of the retardation method of this alkali-activated-carbonate-slag gel material is:
In mass fraction, at normal temperatures, 4 parts of nitrate of baryta are dissolved in 100 parts of water are mixed with retardant solution, again 200 parts of blast furnace slag powder are added wherein, stir; Add 220 parts of moduluses then and be 1.6, sodium oxide and siliconoxide mass percentage concentration sum are 51% exciting agent, add 200 parts of marginality carbonate breezes simultaneously, continue to stir, and promptly make alkali-activated-carbonate-slag gel material.
The gel time of this alkali-activated-carbonate-slag gel material is 2h35min.According to GB8077-2000 " Methods for testing uniformity of concrete admixture ", adopt clean slurry degree of mobilization to characterize the flowing property of slurry, the time dependent result of clean slurry degree of mobilization of this alkali-activated-carbonate-slag gel material is as follows: be 241mm during 10min, being 247mm during 1h, is 208mm during 2h.
Embodiment 3
The implementation procedure of the retardation method of this alkali-activated-carbonate-slag gel material is:
In mass fraction, at normal temperatures, 7 parts of bariumchlorides are dissolved in 100 parts of water are mixed with retardant solution, again 200 parts of blast furnace slag powder are added wherein, stir; Add 220 parts of moduluses then and be 1.8, sodium oxide and siliconoxide mass percentage concentration sum are 51% exciting agent, add 200 parts of marginality carbonate breezes simultaneously, continue to stir, and promptly make alkali-activated-carbonate-slag gel material.
The gel time of this alkali-activated-carbonate-slag gel material is 8h50min.According to GB8077-2000 " Methods for testing uniformity of concrete admixture ", adopt clean slurry degree of mobilization to characterize the flowing property of slurry, the time dependent result of clean slurry degree of mobilization of this alkali-activated-carbonate-slag gel material is as follows: be 201mm during 10min, being 205mm during 1h, is 207mm during 2h, is 208mm during 3h, during 4h 212mm, being 215mm during 5h, is 213mm during 6h, is 189mm during 7h.
Embodiment 4
The implementation procedure of the retardation method of this alkali-activated-carbonate-slag gel material is:
In mass fraction, at normal temperatures, 6 parts of nitrate of baryta are dissolved in 100 parts of water are mixed with retardant solution, again 300 parts of blast furnace slag powder are added wherein, stir; Add 260 parts of moduluses then and be 1.6, sodium oxide and siliconoxide mass percentage concentration sum are 48% exciting agent, add 430 parts of marginality carbonate breezes simultaneously, continue to stir, and promptly make alkali-activated-carbonate-slag gel material.
The gel time of this alkali-activated-carbonate-slag gel material is 1h28min.According to GB8077-2000 " Methods for testing uniformity of concrete admixture ", adopt clean slurry degree of mobilization to characterize the flowing property of slurry, the time dependent result of clean slurry degree of mobilization of this alkali-activated-carbonate-slag gel material is as follows: being 209mm during 10min, is 187mm during 1h.
Embodiment 5
The implementation procedure of the retardation method of this alkali-activated-carbonate-slag gel material is:
In mass fraction, at normal temperatures, 9 parts of bariumchlorides are dissolved in 100 parts of water are prepared into retardant solution, again 200 parts of blast furnace slag powder are added wherein, stir; Add 300 parts of moduluses then and be 1.4, sodium oxide and siliconoxide mass percentage concentration sum are 46% exciting agent, add 300 parts of marginality carbonate breezes simultaneously, continue to stir, and promptly make alkali-activated-carbonate-slag gel material.
The gel time of this alkali-activated-carbonate-slag gel material is 8h51min.According to GB8077-2000 " Methods for testing uniformity of concrete admixture ", adopt clean slurry degree of mobilization to characterize the flowing property of slurry, the time dependent result of clean slurry degree of mobilization of this alkali-activated-carbonate-slag gel material is as follows: being 212mm during 10min, is 241mm during 1h, is 241mm during 2h, during 3h 257mm, being 257mm during 4h, is 272mm during 5h, is 283mm during 6h, being 245mm during 7h, is 161mm during 8h.
Embodiment 6
The implementation procedure of the retardation method of this alkali-activated-carbonate-slag gel material is:
In mass fraction, at normal temperatures, 10 parts of bariumchlorides are dissolved in 100 parts of water are prepared into retardant solution, again 200 parts of blast furnace slag powder are added wherein, stir; Add 430 parts of moduluses then and be 1.8, sodium oxide and siliconoxide mass percentage concentration sum are 55% exciting agent, add 470 parts of marginality carbonate breezes simultaneously, continue to stir, and promptly make alkali-activated-carbonate-slag gel material.
The gel time of this alkali-activated-carbonate-slag gel material is 7h24min.According to GB8077-2000 " coagulation scholar admixture homogeneity test method ", adopt clean slurry degree of mobilization to characterize the flowing property of slurry, the time dependent result of clean slurry degree of mobilization of this alkali-activated-carbonate-slag gel material is as follows: be 269mm during 10min, being 292mm during 1h, is 295mm during 2h, is 301mm during 3h, during 4h 295mm, being 271mm during 5h, is 207mm during 6h, is 117mm during 7h.
Embodiment 7
The implementation procedure of the retardation method of this alkali-activated-carbonate-slag gel material is:
In mass fraction, at normal temperatures, 7 parts of bariumchlorides are dissolved in 100 parts of water are prepared into retardant solution, again 200 parts of blast furnace slag powder are added wherein, stir; Add 230 parts of moduluses then and be 1.4, sodium oxide and siliconoxide mass percentage concentration sum are 50% exciting agent, add 470 parts of marginality carbonate breezes simultaneously, continue to stir, and promptly make alkali-activated-carbonate-slag gel material.
The gel time of this alkali-activated-carbonate-slag gel material is 3h19min.According to GB8077-2000 " Methods for testing uniformity of concrete admixture ", adopt clean slurry degree of mobilization to characterize the flowing property of slurry, the time dependent result of clean slurry degree of mobilization of this alkali-activated-carbonate-slag gel material is as follows: be 218mm during 10min, during 1h 258mm, being 240mm during 2h, is 146mm during 3h.
Embodiment 8
The implementation procedure of the retardation method of this alkali-activated-carbonate-slag gel material is:
In mass fraction, at normal temperatures, 10 parts of bariumchlorides are dissolved in 100 parts of water are prepared into retardant solution, again 200 parts of blast furnace slag powder are added wherein, stir; Add 970 parts of moduluses then and be 1.6, sodium oxide and siliconoxide mass percentage concentration sum are 50% exciting agent, add 1130 parts of marginality carbonate breezes simultaneously, continue to stir, and promptly make alkali-activated-carbonate-slag gel material.
The gel time of this alkali-activated-carbonate-slag gel material is 9h06min.According to GB8077-2000 " Methods for testing uniformity of concrete admixture ", adopt clean slurry degree of mobilization to characterize the flowing property of slurry, the time dependent result of clean slurry degree of mobilization of this alkali-activated-carbonate-slag gel material is as follows: being 232mm during 10min, is 258mm during 1h, is 275mm during 2h, during 3h 290mm, being 276mm during 4h, is 266mm during 5h, is 225mm during 6h, being 196mm during 7h, is 136mm during 8h.
Embodiment 9
The implementation procedure of the retardation method of this alkali-activated-carbonate-slag gel material is:
In mass fraction, at normal temperatures, 10 parts of bariumchlorides are dissolved in 100 parts of water are prepared into retardant solution, again 200 parts of blast furnace slag powder are added wherein, stir; Add 970 parts of moduluses then and be 1.8, sodium oxide and siliconoxide mass percentage concentration sum are 44% exciting agent, add 1130 parts of marginality carbonate breezes simultaneously, continue to stir, and promptly make alkali-activated-carbonate-slag gel material.
The gel time of this alkali-activated-carbonate-slag gel material is 5h18min.According to GB8077-2000 " Methods for testing uniformity of concrete admixture ", adopt clean slurry degree of mobilization to characterize the flowing property of slurry, the time dependent result of clean slurry degree of mobilization of this alkali-activated-carbonate-slag gel material is as follows: be 231mm during 10min, during 1h 261mm, during 2h 267mm, being 262mm during 3h, is 212mm during 4h.
Embodiment 10
The implementation procedure of the retardation method of this alkali-activated-carbonate-slag gel material is:
In mass fraction, at normal temperatures, 10 parts of bariumchlorides are dissolved in 100 parts of water are prepared into retardant solution, again 200 parts of blast furnace slag powder are added wherein, stir; Add 3100 parts of moduluses then and be 1.6, sodium oxide and siliconoxide mass percentage concentration sum are 35% exciting agent, add 3800 parts of marginality carbonate breezes simultaneously, continue to stir, and promptly make alkali-activated-carbonate-slag gel material.
The gel time of this alkali-activated-carbonate-slag gel material is 11h45min.According to GB8077-2000 " Methods for testing uniformity of concrete admixture ", adopt clean slurry degree of mobilization to characterize the flowing property of slurry, the time dependent result of clean slurry degree of mobilization of this alkali-activated-carbonate-slag gel material is as follows: being 224mm during 10min, is 289mm during 1h, is 311mm during 2h, during 3h 314mm, being 309mm during 4h, is 265mm during 5h, is 233mm during 6h, being 207mm during 7h, is 179mm during 8h.
Claims (4)
1, a kind of retardation method of alkali-activated-carbonate/slag gel material is characterized in that, comprises the steps and processing condition:
The first step at normal temperatures, in mass fraction, is dissolved in 4～10 parts of bariumchlorides or nitrate of baryta in 100 parts of water, is mixed with retardant solution, adds 200～300 parts of slag powders then, stirs;
Second step added 220～3100 parts of exciting agents, 200～3800 parts of marginality carbonate breezes successively, continued to stir, and promptly made alkali-activated-carbonate/slag gel material.
According to the retardation method of the described a kind of alkali-activated-carbonate/slag gel material of claim 1, it is characterized in that 2, described exciting agent is the sodium silicate solution of modulus 1.4～1.8, sodium oxide and siliconoxide mass percentage concentration sum are 35～55%.
According to the retardation method of the described a kind of alkali-activated-carbonate/slag gel material of claim 1, it is characterized in that 3, described slag is a blast furnace slag.
According to the retardation method of the described a kind of alkali-activated-carbonate/slag gel material of claim 1, it is characterized in that 4, described marginality carbonate mine is that the CaO mass percentage content is 30～45%, the MgO mass percentage content is 6～20% carbonatite.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102093021A (en) * | 2010-12-28 | 2011-06-15 | 济南高新区工业废弃物利用研发中心 | Slag micro-powder dry mixed mortar |
| CN104150803A (en) * | 2014-08-26 | 2014-11-19 | 重庆大学 | Alkali slag concrete water reducing agent |
| CN111439948A (en) * | 2020-03-04 | 2020-07-24 | 湖南大学 | Retarder, alkali-activated slag-fly ash mortar and cementing material thereof |
| CN112299764A (en) * | 2020-11-03 | 2021-02-02 | 中冶建工集团有限公司 | Steel bar sleeve grouting material containing copper tailing sand and proportion setting method thereof |
| CN113429134A (en) * | 2021-07-21 | 2021-09-24 | 西安建筑科技大学 | Method for adjusting fluidity and setting time of chemically-activated cementing material system |
| CN115321858A (en) * | 2022-08-15 | 2022-11-11 | 中晶环境科技股份有限公司 | Cementitious material, method for its preparation and use of composition |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1040529C (en) * | 1991-10-09 | 1998-11-04 | 重庆建筑工程学院 | Retardant for alkali slag cement |
| CN1118436C (en) * | 1999-09-10 | 2003-08-20 | 华南理工大学 | Method for making calcium metasilicate type binding material at normal temp. by using boundary limestone quarry |
-
2005
- 2005-04-29 CN CN2005100343962A patent/CN1699251B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102093021A (en) * | 2010-12-28 | 2011-06-15 | 济南高新区工业废弃物利用研发中心 | Slag micro-powder dry mixed mortar |
| CN102093021B (en) * | 2010-12-28 | 2013-05-22 | 济南丞华环保科技发展中心 | Slag micro-powder dry mixed mortar |
| CN104150803A (en) * | 2014-08-26 | 2014-11-19 | 重庆大学 | Alkali slag concrete water reducing agent |
| CN111439948A (en) * | 2020-03-04 | 2020-07-24 | 湖南大学 | Retarder, alkali-activated slag-fly ash mortar and cementing material thereof |
| CN111439948B (en) * | 2020-03-04 | 2022-03-29 | 湖南大学 | Retarder, alkali-activated slag-fly ash mortar and cementing material thereof |
| CN112299764A (en) * | 2020-11-03 | 2021-02-02 | 中冶建工集团有限公司 | Steel bar sleeve grouting material containing copper tailing sand and proportion setting method thereof |
| CN112299764B (en) * | 2020-11-03 | 2022-03-01 | 中冶建工集团有限公司 | Steel bar sleeve grouting material containing copper tailing sand and proportion setting method thereof |
| CN113429134A (en) * | 2021-07-21 | 2021-09-24 | 西安建筑科技大学 | Method for adjusting fluidity and setting time of chemically-activated cementing material system |
| CN115321858A (en) * | 2022-08-15 | 2022-11-11 | 中晶环境科技股份有限公司 | Cementitious material, method for its preparation and use of composition |
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