CN1162466C - Early strength type compound water reducer of waste modified polystyrene - Google Patents
Early strength type compound water reducer of waste modified polystyrene Download PDFInfo
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- CN1162466C CN1162466C CNB01103534XA CN01103534A CN1162466C CN 1162466 C CN1162466 C CN 1162466C CN B01103534X A CNB01103534X A CN B01103534XA CN 01103534 A CN01103534 A CN 01103534A CN 1162466 C CN1162466 C CN 1162466C
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- water
- reducing agent
- early strength
- water reducing
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- Curing Cements, Concrete, And Artificial Stone (AREA)
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Abstract
The present invention relates to a compound early strength type modified waste polystyrene water reducing agent. Modified water polystyrene water reducing agents are used as major raw materials for preparing the water reducing agent of the present invention through being compounded with an early strength agent, namely sodium sulfate, and an ordinary water reducing agent, namely calcium lignosulfonate by compounding technology. Compared with the existing early strength type water reducing agent, the water reducing agent of the present invention 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, solves the white pollution problem partially, protects the environment, and has good application prospects in the field of concrete modification.
Description
The present invention relates to a kind of early strength type compound water reducer of waste modified 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.Owing to need, many engineerings also need to have the efficient short-term strength cement water reducer of accelerating the grout solidification.At present, the water-reducing rate of early strength 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 early strength type compound water reducer of waste modified polystyrene of excellent property, simultaneously by utilizing waste and old polystyrene plastics, the protection environment.
Early strength type compound water reducer of waste modified polystyrene provided by the invention utilizes the modified waste old polystyrene water reducer to be main raw material, pass through compounded technology, with hardening accelerator sodium sulfate, the ordinary water-reducing agent sulfonated lignin are composite forms, meter mainly comprises by weight:
Sulfonic acid group content be 20mol%～98mol% 30～100 parts of modified waste old polystyrene water reducers,
5～20 parts in sodium sulfate,
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) with waste and old polystyrol dissolving or swelling in toluene, ethylene dichloride or dimethylbenzene, weight concentration is 30%-80%:(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 hardening accelerator sodium sulfate, calcium lignin sulphonate again, stirred 1 hour, discharging promptly is mixed with early-strength type and changes the waste and old polystyrol composite water-reducing agent.
Preparation technology of the present invention is simple and easy to control, and preparation process does not have waste water, waste gas produces.The cost of the efficient early strength water-reducing agent that the present invention is re-dubbed is at 2000 yuan/ton, and water-reducing rate is greater than 20%, and 1 day intensity of cement concrete can improve more than 40%, and final strength can improve more than 30%.Now on the market similar morning strong high efficiency water reducing agent average cost all at 3800～4000 yuan/ton, the intensity of 1 day cement concrete can only improve 35%.Compare 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 6 kilograms sodium sulfate and 65 kilograms calcium lignin sulphonate, stirred 1 hour, and promptly made concentration and be 27% early strength type compound water reducer of waste modified polystyrene.When addition was 0.7% cement weight, water-reducing rate was 22%, and 1 day ultimate compression strength of cement concrete can improve 41%, and 28 days ultimate compression strength of cement concrete can improve 32%.
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 10 kilograms sodium sulfate and 55 kilograms calcium lignin sulphonate, stirred 1 hour, and promptly made concentration and be 30% early strength type compound water reducer of waste modified polystyrene.When addition was 0.6% cement weight, water-reducing rate was 21%, and 1 day ultimate compression strength of cement concrete can improve 45%, and 28 days ultimate compression strength of cement concrete can improve 31%.
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 8 kilograms sodium sulfate and 50 kilograms calcium lignin sulphonate, stirred 1 hour, and promptly made concentration and be 33% early strength type compound water reducer of waste modified polystyrene.When addition was 0.6% cement weight, water-reducing rate was 26%, and 1 day ultimate compression strength of cement concrete can improve 43%, and 28 days ultimate compression strength of cement concrete can improve 37%.
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 18 kilograms sodium sulfate and 45 kilograms calcium lignin sulphonate, stirred 1 hour, and promptly made concentration and be 29% early strength type compound water reducer of waste modified polystyrene.When addition was 0.6% cement weight, water-reducing rate was 28%, and 1 day ultimate compression strength of cement concrete can improve 48%, and 28 days ultimate compression strength of cement concrete can improve 40%.
Claims (1)
1, a kind of early strength type compound water reducer of waste modified polystyrene, it is characterized in that utilizing the modified waste old polystyrene water reducer to be main raw material, by compounded technology, with hardening accelerator sodium sulfate, the ordinary water-reducing agent calcium lignin sulphonate is composite forms, meter mainly comprises by weight:
Sulfonic acid group content be 20mol%～98mol% 30～100 parts of modified waste old polystyrenes,
5～20 parts in sodium sulfate,
40～70 parts of calcium lignin sulphonates,
300～500 parts in water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB01103534XA CN1162466C (en) | 2000-06-13 | 2001-02-28 | Early strength type compound water reducer of waste modified polystyrene |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN00117170 | 2000-06-13 | ||
| CN00117170.4 | 2000-06-13 | ||
| CNB01103534XA CN1162466C (en) | 2000-06-13 | 2001-02-28 | Early strength type compound water reducer of waste modified polystyrene |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1312324A CN1312324A (en) | 2001-09-12 |
| CN1162466C true CN1162466C (en) | 2004-08-18 |
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ID=25739455
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB01103534XA Expired - Fee Related CN1162466C (en) | 2000-06-13 | 2001-02-28 | Early strength type compound water reducer of waste modified polystyrene |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1162466C (en) |
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2001
- 2001-02-28 CN CNB01103534XA patent/CN1162466C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1312324A (en) | 2001-09-12 |
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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 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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