CN1151201C - Setting-retarding modified composite water-reducing agent prepared from waste polystyrene - Google Patents
Setting-retarding modified composite water-reducing agent prepared from waste polystyrene Download PDFInfo
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- CN1151201C CN1151201C CNB011031921A CN01103192A CN1151201C CN 1151201 C CN1151201 C CN 1151201C CN B011031921 A CNB011031921 A CN B011031921A CN 01103192 A CN01103192 A CN 01103192A CN 1151201 C CN1151201 C CN 1151201C
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- water
- reducing agent
- water reducing
- polystyrene
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Abstract
The present invention relates to a compound retardation modified waste polystyrene water reducing agent. Modified water polystyrene water reducing agents are used as major raw materials for preparing the water reducing agent through being compounded with retardation water reducing agents of sugar calcium and ordinary water reducing agents of calcium lignosulfonate by a compounding technology. Compared with the existing retardation water reducing agent, the water reducing agent has the advantages of great cost reduction and improved performance. Because waste plastics are used as major raw materials, the present invention has low cost, partially solves the white pollution problem, protects the environment, and has good application prospects in the field of concrete modification.
Description
The present invention relates to a kind of setting-retarding modified composite water-reducing agent prepared from waste polystyrene.
Cement is one of material of consumption maximum in the construction work, and the height of the ultimate compression strength of cement concrete directly has influence on the quality of construction work, is the major issue that is related to the social people's livelihood.The ultimate compression strength of cement is inverse relation with the amount of the mixing water that the system of mixing adds during cement concrete, and requires cement slurry to have good flowing property in the building operation.In order both to improve the flowability of grout, increase substantially the ultimate compression strength of cement concrete again, in construction, must add cement water reducing agent.Because need, many engineerings also need to have the high-efficiency cement water reducer that delays the grout solidification.At present, the water-reducing rate of retardation water reducing agent and all be not really desirable on the market to the amplitude that cement concrete strength improves, and also cost is than higher.
The purpose of this invention is to provide a kind of with low cost and setting-retarding modified composite water-reducing agent prepared from waste polystyrene of excellent property, simultaneously by utilizing waste and old polystyrene plastics, the protection environment.
Setting-retarding modified composite water-reducing agent prepared from waste polystyrene provided by the invention utilizes the modified waste old polystyrene water reducer to be main raw material, pass through compounded technology, with retardation water reducing agent sugar calcium, the ordinary water-reducing agent calcium lignin sulphonate is composite forms, the proportioning of above-mentioned raw materials is counted with weight part when composite:
Sulfonic acid group content be 20mol%～98mol% 30～100 parts of modified waste old polystyrene water reducers,
30～60 parts of sugar calcium,
Calcium lignin sulphonate 40-70 part,
Water 300-500 part.
The sulfonic acid group modified waste old polystyrene that the present invention uses is by introduce sulfonic acid group on the waste and old polystyrol chain, with being neutralized into calcium salt with calcium hydroxide, calcium oxide or lime after the water dissolution, make modified waste old polystyrene have the character of the tensio-active agent of hydrophilic and oleophilic, a kind of cement water reducing agent that cement concrete is had efficient diminishing and enhancement of making.The preparation method is as follows: (1) in toluene, ethylene dichloride or dimethylbenzene, weight concentration is 30%-80% with waste and old polystyrol dissolving or swelling; (2) be that the sulfuric acid of 50%-99% is made sulphonating agent with chlorsulfonic acid or weight concentration, be heated to 80 ℃-100 ℃, reaction 3-5 hour; (3) be heated to 110 ℃-140 ℃, distillating recovering solvent 1 hour; (4) be cooled to 80 ℃, add entry, the sulfonated polystyrene is soluble in water, and making weight concentration is the sulfonated polystyrene solution of 5%-40%, is neutralized into neutrality with calcium hydroxide, calcium oxide or lime then, and the pH value is 7-8; (5) be filtered into stable cement water reducing agent solution after concentrate drying get the modified waste old polystyrene water reducer that sulfonic acid group content is 20mol%～98mol%.
In reactor, add modified waste old polystyrene water reducer and the water of the content of sulfonic acid group at 20mol%-98mol%, stir half an hour, add sugared calcium water reducer, calcium lignin sulphonate again, stirred 1 hour, discharging promptly is mixed with setting-retarding modified composite water-reducing agent prepared from waste polystyrene.
Preparation technology of the present invention is simple and easy to control, and preparation process does not have waste water, waste gas produces.Sugar calcium is general retarding water reducer, and its water-reducing rate is up to 18%, and the cement concrete final strength can only improve 23%, about 4000 yuan/ton of average costs, and the slow setting time is 130 minutes.Calcium lignin sulphonate is common poor efficiency water reducer, and water-reducing rate has only 9%, and the final strength of cement concrete does not improve basically.And the cost of the efficient retarding and water reducing agent that the present invention is re-dubbed has only 2500 yuan/ton, the slow setting time was greater than 145 minutes, water-reducing rate is greater than 20%, high water reducing rate can be up to 25%, and the cement concrete final strength can improve more than 30%, compares with like product on the present market, cost significantly reduces, and performance increases, and it is low to have price, characteristics such as excellent property.Owing to utilize waste or used plastics to be main raw material(s), not only cost is lower, also can partly solve " white pollution " problem, has protected environment, has good social value.
Embodiment 1
40 kilograms modified waste old polystyrene water reducers are joined in the reactor of 500 liters, the water that adds 300 kilograms, stir half an hour, add 35 kilograms sugared calcium and 45 kilograms calcium lignin sulphonate, stirred 1 hour, and promptly made concentration and be 29% retardation setting high efficiency compound water reducer of waste modified polystyrene.When addition was 0.7% cement weight, water-reducing rate was 22%, and 28 days ultimate compression strength of cement concrete can improve 32%, and the presetting period of cement concrete is 148 minutes.
Embodiment 2
65 kilograms modified waste old polystyrene water reducers are joined in the reactor of 500 liters, the water that adds 300 kilograms, stir half an hour, add 45 kilograms sugared calcium and 40 kilograms calcium lignin sulphonate, stirred 1 hour, and promptly made concentration and be 33% retardation setting high efficiency compound water reducer of waste modified polystyrene.When addition was 0.6% cement weight, water-reducing rate was 21%, and 28 days ultimate compression strength of cement concrete can improve 31%, and the presetting period of cement concrete is 150 minutes.
Embodiment 3
90 kilograms modified waste old polystyrene water reducers are joined in the reactor of 500 liters, the water that adds 300 kilograms, stir half an hour, add 55 kilograms sugared calcium and 50 kilograms calcium lignin sulphonate, stirred 1 hour, and promptly made concentration and be 39% retardation setting high efficiency compound water reducer of waste modified polystyrene.When addition was 0.6% cement weight, water-reducing rate was 26%, and 28 days ultimate compression strength of cement concrete can improve 37%, and the presetting period of cement concrete is 146 minutes.
Embodiment 4
The modified waste old polystyrene water reducer of double centner is joined in the reactor of 600 liters, the water that adds 400 kilograms, stir half an hour, add 45 kilograms sugared calcium and 65 kilograms calcium lignin sulphonate, stirred 1 hour, and promptly made concentration and be 34% retardation setting high efficiency compound water reducer of waste modified polystyrene.When addition was 0.6% cement weight, water-reducing rate was 25%, and 28 days ultimate compression strength of cement concrete can improve 40%, and the presetting period of cement concrete is 153 minutes.
Claims (1)
1, a kind of setting-retarding modified composite water-reducing agent prepared from waste polystyrene, it is characterized in that utilizing the modified waste old polystyrene water reducer to be main raw material, pass through compounded technology, with retardation water reducing agent sugar calcium, the ordinary water-reducing agent calcium lignin sulphonate is composite forms, the proportioning of above-mentioned raw materials is counted with weight part when composite:
Sulfonic acid group content be 20mol%～98mol% 30～100 parts of modified waste old polystyrene water reducers,
30～60 parts of sugar calcium,
40～70 parts of calcium lignin sulphonates,
300～500 parts in water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB011031921A CN1151201C (en) | 2000-06-13 | 2001-02-28 | Setting-retarding modified composite water-reducing agent prepared from waste polystyrene |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00117171 | 2000-06-13 | ||
| CN00117171.2 | 2000-06-13 | ||
| CNB011031921A CN1151201C (en) | 2000-06-13 | 2001-02-28 | Setting-retarding modified composite water-reducing agent prepared from waste polystyrene |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1313359A CN1313359A (en) | 2001-09-19 |
| CN1151201C true CN1151201C (en) | 2004-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB011031921A Expired - Fee Related CN1151201C (en) | 2000-06-13 | 2001-02-28 | Setting-retarding modified composite water-reducing agent prepared from waste polystyrene |
Country Status (1)
| Country | Link |
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| CN (1) | CN1151201C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MX2014001196A (en) * | 2011-08-30 | 2014-05-13 | Sika Technology Ag | Mid-range water reducers (mrwr) for concrets. |
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2001
- 2001-02-28 CN CNB011031921A patent/CN1151201C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1313359A (en) | 2001-09-19 |
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Owner name: HANBANG CHEMICAL CO., LTD., GUANGZHOU CITY Free format text: FORMER OWNER: GUANGZHOU INST OF CHEMISTRY, CHINESE ACADEMY OF SCIENCES Effective date: 20030425 |
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Effective date of registration: 20030425 Address after: Guangdong city of Guangzhou province Wushan 510650 box 1122 Applicant after: Guangzhou Inst. of Chemistry, Chinses Academy of Sceiences Address before: Guangdong city of Guangzhou province Wushan 510650 box 1122 Applicant before: Guangzhou Inst. of Chemistry, Chinese Academy of Sciences |
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