CN105000819A - Retarder applicable to sulphate aluminum cement - Google Patents
Retarder applicable to sulphate aluminum cement Download PDFInfo
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- CN105000819A CN105000819A CN201510475045.9A CN201510475045A CN105000819A CN 105000819 A CN105000819 A CN 105000819A CN 201510475045 A CN201510475045 A CN 201510475045A CN 105000819 A CN105000819 A CN 105000819A
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Abstract
The invention discloses retarder applicable to sulphate aluminum cement. The retarder is composed of, by weight, 7-60 parts of carbamide, 3-11 parts of sodium lignin sulfonate, 2-7 parts of dinaphthyl methane disulfonic acid sodium, 2-5 parts of water reducing agent and 30-70 parts of vermiculite. By means of the retarder, the coagulation speed of the sulphate aluminum cement can be effectively reduced, the flowability of sulphate aluminum cement slurry can be remarkably improved, and the water demand in the sulphate aluminum cement mixing process can be reduced. The carbamide is added into the retarder, the coagulation time of the sulphate aluminum cement can be prolonged, nitrogen nutrient elements required by the plant growth can be further released slowly after the cement slurry is hardened, and the nitrogen nutrient elements are supplied to plants in porous plant-growing concrete for meeting the plant growth requirements.
Description
Technical field
The invention belongs to cement additive field, be specifically related to a kind of retardant being applicable to aluminosulfate cement.
Background technology
In order to extend the hydration and hardening time of cement, how in concrete, to mix retardant, making fresh concrete can keep plasticity in a long time, thus regulate the time of coagulation of fresh concrete.Aluminosulfate cement has the characteristics such as basicity is low, hydration and hardening speed is fast, intensity is high, makes it be more suitable for and prepares porous ecological concrete.But because its time of coagulation is too short, the hydration and hardening time, the too fast constructing operation that causes was difficult.In order to extend time of coagulation, the boric acid that uses extends its time of coagulation as retardant more now, and boric acid is obvious to the retarding effect of aluminosulfate cement, but has detrimentally affect to the ultimate compression strength of hardening of cement slurry.In addition, the cellular concrete skeleton using cement to prepare can not provide nutrition for plant, difficulty of topdressing after greening, and fertilizer efficiency utilization ratio is low.
Summary of the invention
The present invention is directed to the deficiencies in the prior art, provide a kind of with low cost, effectively can delay the rate of set of aluminosulfate cement, improve the degree of mobilization of aluminosulfate cement slurry, demand to water when reducing aluminosulfate cement mix, can also the retardant being applicable to aluminosulfate cement of nitrogen nutrition element needed for slow releasing plant-growth.
For achieving the above object, the present invention adopts following technical scheme:
Be applicable to a retardant for aluminosulfate cement, be made up of the raw material of following weight part: urea 7-60 part, sodium lignosulfonate 3-11 part, dinaphthylmethanedisulfonic acid sodium 2-7 part, water reducer 2-5 part, vermiculite 30-70 part.
Preferably, a kind of retardant being applicable to aluminosulfate cement, is made up of the raw material of following weight part: urea 20-40 part, sodium lignosulfonate 5-9 part, dinaphthylmethanedisulfonic acid sodium 3-5 part, water reducer 3-4 part, vermiculite 40-60 part.
Preferred, a kind of retardant being applicable to aluminosulfate cement, is made up of the raw material of following weight part: 30 parts, urea, sodium lignosulfonate 7 parts, 4 parts, dinaphthylmethanedisulfonic acid sodium, water reducer 3.5 parts, vermiculite 50 parts.
Described, vermiculite is vermiculite power, and fineness is 200 orders, tails over < 10%.
Described, sodium lignosulfonate is tawny powder, lignosulfonic acid sodium content >45%, tail over≤4%.
Described, water reducer is aliphatic high-efficiency water reducing agent.
Described, aliphatic high-efficiency water reducing agent is powder, working substance content >=92%.
In the present invention, urea is a kind of conventional fertilizer, can provide nitrogen nutrition element for plant.After urea admixture water inlet mud, because hydrolysis of urea creates carbonic acid, carbonic acid and calcium hydroxide reaction thus hinder the generation speed of part ettringite, reduce the hydration rate of aluminosulfate cement, delay the time of coagulation of cement, thus cement flows degree is improved to a certain extent.
In the present invention, vermiculite is a kind of lamella water-keeping material, wherein has a lot of passages, vermiculite is used to improve this porous material of hardening of cement slurry, make hardening of cement slurry be rich in more concrete dynamic modulus and passage, be conducive to the stripping of urea in cement, supply plant-growth needs.Vermiculite has higher ion-exchange capacity, the stripping of nutritive element is needed longer, thus reaches the slow release effect of hardening of cement slurry to fertilizer efficiency.
In the present invention, use the dispersion agent of sodium lignosulfonate and dinaphthylmethanedisulfonic acid sodium compound can fully disperse cement and vermiculite, vermiculite and cement are better mixed, guarantees the integrity of passage in hardening of cement slurry, promote the stripping of urea, improve the utilization ratio of fertilizer.On the other hand, after cement and vermiculite granule disperse, the water of particle encapsulation is discharged, and vermiculite can absorb moisture better, and slurry degree of mobilization improves further.
Beneficial effect of the present invention:
1. retardant of the present invention effectively can delay the rate of set of aluminosulfate cement, and initial set and final setting time all can extend more than 20min.
2. retardant of the present invention can significantly improve the degree of mobilization of aluminosulfate cement slurry, and paste flowing degree improves more than 8%.
3. the demand to water when retardant of the present invention significantly can reduce aluminosulfate cement mix.
4. admixture urea in retardant of the present invention, not only can extend the time of coagulation of aluminosulfate cement, nitrogen nutrition element after cement slurry sclerosis needed for all right slow releasing plant-growth, the growth needs of plant in supply porous concrete for plant growth, after tested, 28 days accumulation nitrogen nutrition Element release amount 9-67mg/cm
3, preparation can reach 22-89%.
Embodiment
Below in conjunction with specific embodiment, the present invention is described in detail.
embodiment 1
Be applicable to a retardant for aluminosulfate cement, be made up of the raw material of following weight part: 7 parts, urea, sodium lignosulfonate 11 parts, 2 parts, dinaphthylmethanedisulfonic acid sodium, water reducer 2 parts, vermiculite 70 parts.
Described, vermiculite is vermiculite power, and fineness is 200 orders, tails over < 10%.
Described, sodium lignosulfonate is tawny powder, lignosulfonic acid sodium content >45%, tail over≤4%.
Described, water reducer is aliphatic high-efficiency water reducing agent.
Described, aliphatic high-efficiency water reducing agent is powder, working substance content >=92%.
Using method: mixed by above each raw material, add in mixing water, abundant stirring and dissolving and dispersion, according to 5.9% addition content of aluminosulfate cement weight, with cement mix.
embodiment 2
Be applicable to a retardant for aluminosulfate cement, be made up of the raw material of following weight part: 20 parts, urea, sodium lignosulfonate 9 parts, 5 parts, dinaphthylmethanedisulfonic acid sodium, water reducer 3 parts, vermiculite 60 parts.
All the other are with embodiment 1.
embodiment 3
Be applicable to a retardant for aluminosulfate cement, be made up of the raw material of following weight part: 30 parts, urea, sodium lignosulfonate 7 parts, 4 parts, dinaphthylmethanedisulfonic acid sodium, water reducer 3.5 parts, vermiculite 50 parts.
All the other are with embodiment 1.
embodiment 4
Be applicable to a retardant for aluminosulfate cement, be made up of the raw material of following weight part: 40 parts, urea, sodium lignosulfonate 5 parts, 3 parts, dinaphthylmethanedisulfonic acid sodium, water reducer 4 parts, vermiculite 40 parts.
All the other are with embodiment 1.
embodiment 5
Be applicable to a retardant for aluminosulfate cement, be made up of the raw material of following weight part: 60 parts, urea, sodium lignosulfonate 3 parts, 2 parts, dinaphthylmethanedisulfonic acid sodium, water reducer 5 parts, vermiculite 30 parts.
All the other are with embodiment 1.
performance test
Not add the aluminosulfate cement of any retardant for comparative example, respectively to add the aluminosulfate cement of the retardant that embodiment 1-5 obtains for experimental example 1-5.With reference to GBT8077-2000 " concrete admixture homogeneity test method ", under 0.45 water cement ratio condition, measure the paste flowing degree of comparative example and experimental example 1-5; With reference to GB/T1346-2011 " cement normal consistency water consumption, time of coagulation, the stability method of inspection ", under 0.27 water cement ratio condition, adopt Vicat apparatus measure comparative example and experimental example 1-5 time of coagulation and 28 days only starch ultimate compression strength; Under 0.27 water cement ratio condition, get two 2 × 2 × 2cm of experimental example 1-5 respectively
3clean slurry test block is placed in 200ml water in 20 DEG C of maintaining box maintenances, water is changed when curing age is 1,3,7,14,28 day, take out solution and be settled to 250ml, measure total nitrogen content in the aqueous solution with reference to HJ 11894-89 " the mensuration alkaline chitinase of water quality total nitrogen clears up ultraviolet spectrophotometry ".Detected result is as shown in table 1.
Table 1 the performance test results
Although embodiment of the present invention are open as above, but it is not restricted to listed in specification sheets and embodiment utilization, it can be applied to various applicable the field of the invention completely, for those skilled in the art, can easily realize other amendment, therefore do not deviating under the universal that claim and equivalency range limit, the present invention is not limited to specific details and illustrates here and the legend described.
Claims (7)
1. be applicable to a retardant for aluminosulfate cement, it is characterized in that, be made up of the raw material of following weight part: urea 7-60 part, sodium lignosulfonate 3-11 part, dinaphthylmethanedisulfonic acid sodium 2-7 part, water reducer 2-5 part, vermiculite 30-70 part.
2. retardant according to claim 1, is characterized in that, is made up of the raw material of following weight part: urea 20-40 part, sodium lignosulfonate 5-9 part, dinaphthylmethanedisulfonic acid sodium 3-5 part, water reducer 3-4 part, vermiculite 40-60 part.
3. retardant according to claim 2, is characterized in that, is made up of the raw material of following weight part: 30 parts, urea, sodium lignosulfonate 7 parts, 4 parts, dinaphthylmethanedisulfonic acid sodium, water reducer 3.5 parts, vermiculite 50 parts.
4. the retardant according to any one of claim 1-3, is characterized in that, described vermiculite is vermiculite power, and fineness is 200 orders, tails over < 10%.
5. the retardant according to any one of claim 1-3, is characterized in that, described sodium lignosulfonate is tawny powder, lignosulfonic acid sodium content >45%, tail over≤4%.
6. the retardant according to any one of claim 1-3, is characterized in that, described water reducer is aliphatic high-efficiency water reducing agent.
7. retardant according to claim 6, is characterized in that, described aliphatic high-efficiency water reducing agent is powder, working substance content >=92%.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510475045.9A CN105000819B (en) | 2015-08-06 | 2015-08-06 | A kind of retarder suitable for sulphate aluminium cement |
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| CN201510475045.9A CN105000819B (en) | 2015-08-06 | 2015-08-06 | A kind of retarder suitable for sulphate aluminium cement |
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| CN105000819B CN105000819B (en) | 2017-03-29 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007596A (en) * | 2016-05-30 | 2016-10-12 | 济南大学 | Fertilizer effect slow-release type cement-based gelling material, and preparation method thereof |
| CN106746894A (en) * | 2017-01-23 | 2017-05-31 | 济南大学 | A kind of retarder and its application method suitable for sulphate aluminium cement |
| CN107162458A (en) * | 2017-05-31 | 2017-09-15 | 徐州铸建建材科技有限公司 | A kind of super-retarder and its application method for extending concrete coagulating time |
| CN108083674A (en) * | 2017-12-27 | 2018-05-29 | 济南大学 | A kind of retarder suitable for sulphate aluminium cement |
| CN108101408A (en) * | 2017-12-18 | 2018-06-01 | 常州达奥新材料科技有限公司 | A kind of preparation method of cement retarder |
| CN109626918A (en) * | 2019-01-01 | 2019-04-16 | 中国人民解放军63653部队 | Retardation setting type low alkalinity composite gelled material and preparation method thereof |
| CN112645627A (en) * | 2020-12-18 | 2021-04-13 | 马鞍山市国林建材有限公司 | Preparation method of modified aluminate cement retarder for Z-shaped concrete hollow block production |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101462851A (en) * | 2008-04-18 | 2009-06-24 | 中国石油化工股份有限公司河南油田分公司石油工程技术研究院 | Retardation cement mortar |
-
2015
- 2015-08-06 CN CN201510475045.9A patent/CN105000819B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101462851A (en) * | 2008-04-18 | 2009-06-24 | 中国石油化工股份有限公司河南油田分公司石油工程技术研究院 | Retardation cement mortar |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106007596A (en) * | 2016-05-30 | 2016-10-12 | 济南大学 | Fertilizer effect slow-release type cement-based gelling material, and preparation method thereof |
| CN106007596B (en) * | 2016-05-30 | 2018-08-17 | 济南大学 | A kind of efficiency slow release type cement-based gelling material and preparation method thereof |
| CN106746894A (en) * | 2017-01-23 | 2017-05-31 | 济南大学 | A kind of retarder and its application method suitable for sulphate aluminium cement |
| CN107162458A (en) * | 2017-05-31 | 2017-09-15 | 徐州铸建建材科技有限公司 | A kind of super-retarder and its application method for extending concrete coagulating time |
| CN108101408A (en) * | 2017-12-18 | 2018-06-01 | 常州达奥新材料科技有限公司 | A kind of preparation method of cement retarder |
| CN108083674A (en) * | 2017-12-27 | 2018-05-29 | 济南大学 | A kind of retarder suitable for sulphate aluminium cement |
| CN108083674B (en) * | 2017-12-27 | 2020-07-21 | 济南大学 | Retarder suitable for sulphoaluminate cement |
| CN109626918A (en) * | 2019-01-01 | 2019-04-16 | 中国人民解放军63653部队 | Retardation setting type low alkalinity composite gelled material and preparation method thereof |
| CN109626918B (en) * | 2019-01-01 | 2021-12-31 | 中国人民解放军63653部队 | Retarding type low-alkalinity composite cementing material and preparation method thereof |
| CN112645627A (en) * | 2020-12-18 | 2021-04-13 | 马鞍山市国林建材有限公司 | Preparation method of modified aluminate cement retarder for Z-shaped concrete hollow block production |
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| CN105000819B (en) | 2017-03-29 |
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