CN108358572A - A kind of preparation method of the enhanced sulphoaluminate cement base material of alkali-activated carbonatite - Google Patents
A kind of preparation method of the enhanced sulphoaluminate cement base material of alkali-activated carbonatite Download PDFInfo
- Publication number
- CN108358572A CN108358572A CN201810403246.1A CN201810403246A CN108358572A CN 108358572 A CN108358572 A CN 108358572A CN 201810403246 A CN201810403246 A CN 201810403246A CN 108358572 A CN108358572 A CN 108358572A
- Authority
- CN
- China
- Prior art keywords
- calcium hydroxide
- cement
- flyash
- sulphate aluminium
- alkali
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/06—Aluminous cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2201/00—Mortars, concrete or artificial stone characterised by specific physical values
- C04B2201/50—Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention discloses a kind of preparation methods of the enhanced sulphoaluminate cement base material of alkali-activated carbonatite, and one includes the following steps：(1) sulphate aluminium cement and flyash are mixed and is used as cementitious material；(2) calcium hydroxide aqueous solution is made by calcium hydroxide is soluble in water；(3) cementitious material is added in calcium hydroxide aqueous solution and is stirred to obtain the final product.Include various ingredients in the present invention, using sulphate aluminium cement as base-material, flyash is as modifying agent, and calcium hydroxide solution is as modified conditioning agent, to make modified sulphate aluminium cement.Sulphoaluminate cement base material prepared by the present invention can effectively shorten initial set and the final setting time of cement, significantly facilitate the generation of hydrated product entringite, significantly facilitate the secondary reaction of hydration of flyash, effectively improve the problem of sulphate aluminium cement later strength increasess slowly, economic cost is reduced, it is with good economic efficiency.
Description
Technical field
The invention belongs to building material technical fields, and in particular to a kind of enhanced sulphoaluminate cement base material of alkali-activated carbonatite
Preparation method.
Background technology
Sulphate aluminium cement has the characteristics that early strong, high-strength, freeze proof, low alkali, excellent durability, is widely applied to quickly
The special engineerings such as repairing, ocean engineering, but its later stage strength development is slow, hydration heat collection moderate defect limits the extensive of it
Using.Therefore, how to improve sulphate aluminium cement performance makes it extensively using as one of current main direction of studying.Additive
It is one of important component indispensable in modern cement concrete, incorporation additive is to improve cement and concrete performance must not
A kind of method that can lack.The incorporation of appropriate flyash can not only substantially reduce hydration heat of cement, solve later strength (after 28d)
The problem of developing slowly, and there is good economy and environmental effect.But incorporation flyash can reduce sulphate aluminium cement powder
The total degree of hydration of coal ash, has weakening to early strength；When especially doping quantity of fly ash is excessive, later strength can drastically reduce, this
It is because the lateral reactivity of flyash does not eject.Therefore, the incorporation of flyash is restricted, and the amount of being typically incorporating exists
10%~15%, incorporation is relatively low.Alkali-activator has good stimulation effect to flyash, and in the water of sulphate aluminium cement
During change, only minimal amount of calcium hydroxide generates, and can not effectively excite the lateral reactivity of flyash.
Invention content
In order to solve the above technical problem, the present invention provides be designed to provide it is a kind of simple for process, low-cost
The preparation method of sulphate aluminium cement aquation, it is intended to while ensureing cement performance, improve the incorporation of flyash, shorten cement
The first of slurry, final setting time.
Though sulphate aluminium cement has many advantages, such as the problem of early strong, high-strength, its heat of hydration is excessive and later strength retraction
It is urgently to be resolved hurrily.By mixing flyash, the early hydration heat release of sulphate aluminium cement, but the incorporation of flyash can be effectively reduced
The intensity of cement briquette can be greatly reduced.The present invention improves aluminium sulfate hydrated environment by mixing calcium hydroxide solution
Basicity, alkaline environment can promote Al in clinker3+Dissolving, so that the generating rate of Al-O octahedron nucleus is increased, promote aquation
The formation of product entringite, to accelerate the heat evolution velocity of sulphate aluminium cement, and aquation initial stage entringite quantity increases；And
Calcium hydroxide can be very well with the aluminosilicate glass precursor reactant in flyash, and the quantity for generating C-S-H gelinites increases, and fills petrifying water
Harmful hole of slurry body makes slurry become dense to improve and be effectively guaranteed cement examination so as to improve cement slurry pore structure
Block later strength sustainable growth.
Scheme provided by the invention is as follows.
A kind of preparation method of the enhanced sulphoaluminate cement base material of alkali-activated carbonatite, which is characterized in that include the following steps：
(1) sulphate aluminium cement and flyash are mixed and is used as cementitious material；
(2) calcium hydroxide aqueous solution is configured to by calcium hydroxide is soluble in water；
(3) cementitious material is added in calcium hydroxide aqueous solution and is stirred to obtain the final product.
Sulphate aluminium cement accounts for the 75%-85% of cementitious material gross mass in above-mentioned steps (1), and surplus is flyash.
Flyash described in above-mentioned steps (1) is I grade of flyash, and activity index is not less than 85%.
The ratio of water and cementitious material is 0.6 in above-mentioned steps (2).
The dosage of calcium hydroxide is the 0.5%-2% of cementitious material in above-mentioned steps (2).
Beneficial effects of the present invention：
(1) incorporation of calcium hydroxide can be obviously shortened the setting time of sulphate aluminium cement-flyash composite gelled material；
(2) incorporation of calcium hydroxide can promote the formation of hydrated product entringite, to accelerate the water of sulphate aluminium cement
Change process, and aquation initial stage entringite quantity increases；
(3) the problem of sulphate aluminium cement later strength increasess slowly is effectively improved, economic cost is reduced, is had good
Economic benefit.
(4) incorporation for improving flyash, reaches as high as 25%, is effectively improved later strength (after 28d) development
Speed；
(5) by using the technique of rear incorporation calcium hydroxide, the stimulation effect of alkali-activator is considerably increased so that i.e.
Keep the early strength of cement under the premise of flyash larger incorporation still higher.
Description of the drawings
Fig. 1 is influence of the different calcium hydroxide contents to sulphate aluminium cement-flyash composite gelled material setting time；
Fig. 2 is the relation curve of calcium hydroxide content and sulphate aluminium cement-flyash composite gelled material compression strength.
Specific implementation mode
The present invention is further described With reference to embodiment, and present disclosure is completely without being limited thereto.
Embodiment 1
Prepare the enhanced sulphate aluminium cement of alkali-activated carbonatite
(1) 480g sulphate aluminium cements and 120g fly ash gel materials are mixed；
(2) calcium hydroxide of 3g is dissolved in 360g water and is configured to calcium hydroxide aqueous solution；
(3) cementitious material is added in calcium hydroxide aqueous solution to be placed on the net slurry blender that mixes cement and stirs four minutes slowly
To obtain the final product.
Embodiment 2
Prepare the enhanced sulphate aluminium cement of alkali-activated carbonatite
(1) 450g sulphate aluminium cements and 150g flyash cementitious material is accounted for mix；
(2) calcium hydroxide of 6g is dissolved in 360g water and is configured to calcium hydroxide aqueous solution；
(3) cementitious material is added in calcium hydroxide aqueous solution to be placed on the net slurry blender that mixes cement and stirs four minutes slowly
To obtain the final product.
Embodiment 3
Prepare the enhanced sulphate aluminium cement of alkali-activated carbonatite
(1) 510g sulphate aluminium cements and 90g flyash cementitious material is accounted for mix；
(2) calcium hydroxide of 12g is dissolved in 360g water and is configured to calcium hydroxide aqueous solution；
(3) cementitious material is added in calcium hydroxide aqueous solution to be placed on the net slurry blender that mixes cement and stirs four minutes slowly
To obtain the final product.
Comparative example 1
Comparative example is prepared, aluminium sulfate and flyash are mixed with cement slurry
(1) 480g sulphate aluminium cements and 120g flyash cementitious material is accounted for mix；
(2) cementitious material is added in 360g water to be placed on the net slurry blender that mixes cement and stirs four minutes slowly to obtain the final product.
Embodiment 4
The setting time of water-setting slurry and compression strength prepared by testing example 1-3 and comparative example 1.
Setting time is measured according to GB/T 1346-2011, but the water-cement ratio of cement slurry is fixed as 0.6, and surveys
Determine not overturn die trial when final setting time.
Compression strength is measured according to GB/T 17671-1999, and cement briquette size is 40mm × 40mm × 40mm, water
Glue ratio is 0.6, is placed in temperature maintenance in (20 ± 1) DEG C, standard curing box of the relative humidity more than 90% and demoulds afterwards for 24 hours, takes off
In (20 ± 1) DEG C curing in water to providing age after mould.Initial set, final setting time and the cement slurry of cement slurry are tested at 28 days
Compression strength in age.
Test result is as follows：
The initial set of 1 cement slurry of embodiment and final setting time are respectively 60min and 90min；1 day, 3 days, 7 days and 28 simultaneously
The compression strength of its age is respectively 14.9MPa, 16.2MPa, 18MPa and 19MPa.
The initial set of 2 cement slurry of embodiment and final setting time are respectively 138min and 162min；Simultaneously 1 day, 3 days, 7 days and
The compression strength of 28 day age is respectively 12.8MPa, 13.4MPa, 13.9MPa and 14.5MPa.
The initial set of 3 cement slurry of embodiment and final setting time are respectively 65min and 78min；1 day, 3 days, 7 days and 28 simultaneously
The compression strength of its age is respectively 15.7MPa, 20.3MPa, 21.6MPa and 25.9MPa.
The initial set of 1 cement slurry of comparative example and final setting time are respectively 195min and 225min；Simultaneously 1 day, 3 days, 7 days and
The compression strength of 28 day age is respectively 13MPa, 13.5MPa, 14MPa and 14.7MPa.
Embodiment 1-3 and the analysis of 1 performance comparison of comparative example.
Wherein A1 represents 1 volume of embodiment, and A2 represents 2 volume of embodiment, and A3 represents 3 volume of embodiment, and C1 represents comparison
1 volume of example.
Fig. 1 shows the comparison diagram of setting time.It can be seen from the figure that when calcium hydroxide volume is 0.5% (A1),
The initial set of cement slurry and final setting time are obviously shortened, and 69% and 60% are shortened respectively compared to blank group；When calcium hydroxide is mixed
When amount is 1% (A2), 34% and 33% has been respectively shortened compared to the first of blank group, final setting time in cement slurry；Work as calcium hydroxide
When volume is 2% (A3), 64% and 62% has been respectively shortened compared to the first of blank group, final setting time in cement slurry.
Fig. 2 shows the comparison diagrams of compression strength.It can be seen from the figure that when calcium hydroxide volume is 0.5% (A1),
The compression strength of 3 days and 28 day age significantly increase, and 20% and 29.3% are increased respectively compared to blank group.When calcium hydroxide is mixed
When amount is 1% (A2), compares blank group with the compression strength of 28 day age within 3 days and increase 9% and 4% respectively.Work as calcium hydroxide
When volume is 2% (A3), compares blank group with the compression strength of 28 day age within 3 days and increase 43% and 53% respectively.
In conclusion the setting time of the cement slurry prepared using this method is obviously shortened, the presetting period is at most reachable
69%, final setting time is at most up to 60%；Compression strength is also greatly improved, and the compression strength of 3 days and 28 day age are most
43% and 53% has been respectively increased.Thus this method is a kind of with practical value, low-cost cement slurry production work
Skill.
The foregoing is only a preferred embodiment of the present invention, but the scope of protection of the invention be not limited thereto,
Any modification that any one skilled in the art is made in the technical scope disclosed by the present invention, equivalent replacement and
Improve etc., it should be included within the protection domain of invention.
Claims (5)
1. a kind of preparation method of the enhanced sulphoaluminate cement base material of alkali-activated carbonatite, which is characterized in that include the following steps：
(1) sulphate aluminium cement and flyash are mixed and is used as cementitious material；
(2) calcium hydroxide aqueous solution is made by calcium hydroxide is soluble in water；
(3) cementitious material is added in calcium hydroxide aqueous solution and is stirred to obtain the final product.
2. a kind of preparation method of the enhanced sulphoaluminate cement base material of alkali-activated carbonatite according to claim 1, feature
It is：Sulphate aluminium cement accounts for the 75%-85% of cementitious material gross mass in the step (1), and surplus is flyash.
3. enhanced sulphoaluminate cement base material of a kind of alkali-activated carbonatite according to claim 1 and preparation method thereof, special
Sign is：Flyash described in the step (1) is I grade of flyash, and activity index is not less than 85%.
4. a kind of preparation method of the enhanced sulphoaluminate cement base material of alkali-activated carbonatite according to claim 1, feature
It is：Water and the mass ratio of cementitious material in step (1) are 3 in the step (2):5.
5. a kind of preparation method of the enhanced sulphoaluminate cement base material of alkali-activated carbonatite according to claim 1, feature
It is：The dosage of calcium hydroxide is the 0.5%-2% of cementitious material in the step (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810403246.1A CN108358572A (en) | 2018-04-28 | 2018-04-28 | A kind of preparation method of the enhanced sulphoaluminate cement base material of alkali-activated carbonatite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810403246.1A CN108358572A (en) | 2018-04-28 | 2018-04-28 | A kind of preparation method of the enhanced sulphoaluminate cement base material of alkali-activated carbonatite |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108358572A true CN108358572A (en) | 2018-08-03 |
Family
ID=63009572
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810403246.1A Pending CN108358572A (en) | 2018-04-28 | 2018-04-28 | A kind of preparation method of the enhanced sulphoaluminate cement base material of alkali-activated carbonatite |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108358572A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109650755A (en) * | 2019-01-18 | 2019-04-19 | 中国建筑材料科学研究总院有限公司 | High alkalinity sulphate aluminium cement of sulfur acid calcium and preparation method thereof |
| CN111606632A (en) * | 2020-05-20 | 2020-09-01 | 武汉理工大学 | Low-shrinkage fast-setting gangue-based alkali-activated fast repairing material and preparation method thereof |
| CN112877234A (en) * | 2021-01-26 | 2021-06-01 | 太原理工大学 | Paenibacillus mucilaginosus, microorganism-excited circulating fluidized bed fly ash cementing material, method and application |
| CN113480277A (en) * | 2021-07-02 | 2021-10-08 | 华新超可隆新型建材科技(黄石)有限公司 | Super early strength type super high performance concrete and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2235857C1 (en) * | 2003-02-04 | 2004-09-10 | Дочернее общество с ограниченной ответственностью "Буровая компания открытого акционерного общества "ГАЗПРОМ" | Backfilling material |
| CN104446048A (en) * | 2014-12-01 | 2015-03-25 | 中国建筑材料科学研究总院 | High-calcium sulfoaluminate series cement |
-
2018
- 2018-04-28 CN CN201810403246.1A patent/CN108358572A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2235857C1 (en) * | 2003-02-04 | 2004-09-10 | Дочернее общество с ограниченной ответственностью "Буровая компания открытого акционерного общества "ГАЗПРОМ" | Backfilling material |
| CN104446048A (en) * | 2014-12-01 | 2015-03-25 | 中国建筑材料科学研究总院 | High-calcium sulfoaluminate series cement |
Non-Patent Citations (1)
| Title |
|---|
| 范建军等: "碱激发粉煤灰水泥的试验研究", 《混凝土世界》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109650755A (en) * | 2019-01-18 | 2019-04-19 | 中国建筑材料科学研究总院有限公司 | High alkalinity sulphate aluminium cement of sulfur acid calcium and preparation method thereof |
| CN109650755B (en) * | 2019-01-18 | 2023-01-06 | 中国建筑材料科学研究总院有限公司 | High-alkalinity sulphate aluminium cement containing calcium sulphate and preparation method thereof |
| CN111606632A (en) * | 2020-05-20 | 2020-09-01 | 武汉理工大学 | Low-shrinkage fast-setting gangue-based alkali-activated fast repairing material and preparation method thereof |
| CN111606632B (en) * | 2020-05-20 | 2021-07-06 | 武汉理工大学 | Low-shrinkage fast-setting gangue-based alkali-activated fast repairing material and preparation method thereof |
| CN112877234A (en) * | 2021-01-26 | 2021-06-01 | 太原理工大学 | Paenibacillus mucilaginosus, microorganism-excited circulating fluidized bed fly ash cementing material, method and application |
| CN113480277A (en) * | 2021-07-02 | 2021-10-08 | 华新超可隆新型建材科技(黄石)有限公司 | Super early strength type super high performance concrete and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108358572A (en) | A kind of preparation method of the enhanced sulphoaluminate cement base material of alkali-activated carbonatite | |
| CN110510906B (en) | Alkali-free liquid accelerator and preparation method thereof | |
| CN108585587B (en) | Normal-temperature synthesized early-strength liquid alkali-free accelerator and preparation method thereof | |
| CN112125543B (en) | Composite gel material prepared from bulk solid wastes and preparation method thereof | |
| CN107522453A (en) | Air entrained concrete and preparation method thereof | |
| CN103570259A (en) | Geopolymer dry powder material as well as preparation method thereof | |
| CN111439948B (en) | Retarder, alkali-activated slag-fly ash mortar and cementing material thereof | |
| CN106630725B (en) | Liquid accelerator for sprayed concrete and preparation method thereof | |
| CN115572086B (en) | Spontaneous combustion coal gangue base polymer cementing material and preparation method thereof | |
| CN115925306A (en) | Dicalcium silicate activator and preparation method and application thereof | |
| CN115417632A (en) | Preparation method of phosphogypsum precast concrete | |
| EA036829B1 (en) | Accelerator for hydraulic composition | |
| CN109503022A (en) | A kind of concrete accelerator of environment-friendly and green | |
| CN111689747B (en) | 3D printed color decoration mortar | |
| CN111003964B (en) | Alkali-free liquid accelerator and production process thereof | |
| CN101343161A (en) | Cement-slag powder gel system with desulfurized gypsum as excitant | |
| CN110372309B (en) | Titanium gypsum-based material for goaf filling and preparation method thereof | |
| CN103588409B (en) | Desulphurization building gypsum retardant and preparation method thereof | |
| CN115594450B (en) | Geopolymer ceramsite lightweight concrete and preparation method thereof | |
| CN110713354A (en) | Phosphorus slag silicon-aluminum-based cementing material and preparation method thereof | |
| CN104058707B (en) | A kind of resistance to water gypsum base body of wall material for repairing | |
| CN107759126B (en) | Water reducing agent for sprayed concrete and preparation method thereof | |
| CN114702255A (en) | Super-sulfate cement prepared from low-activity acidic slag and preparation method thereof | |
| CN114180895A (en) | Production process of inorganic composite grouting material | |
| CN108218280A (en) | Cement hardener and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180803 |
|
| RJ01 | Rejection of invention patent application after publication |