CN103332876B - Regenerated hardened cement mortar powder cementing material and preparation method thereof - Google Patents
Regenerated hardened cement mortar powder cementing material and preparation method thereof Download PDFInfo
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- CN103332876B CN103332876B CN201310241787.6A CN201310241787A CN103332876B CN 103332876 B CN103332876 B CN 103332876B CN 201310241787 A CN201310241787 A CN 201310241787A CN 103332876 B CN103332876 B CN 103332876B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/10—Production of cement, e.g. improving or optimising the production methods; Cement grinding
Abstract
The invention provides a regenerated hardened cement mortar powder cementing material and a preparation method thereof. The cementing material comprises the following components in parts by mass: 55-75 parts of waste hardened cement mortar, 25-45 parts of phosphorus slag, 1.0-3.5 parts of sodium hydroxide, 4-10 parts of water glass, 0.5-1.0 part of tartaric acid, 0.5-1.2 parts of water reducer and 25-35 parts of water. The water glass is metered on the basis of solid content in the water glass, and the water contains liquid water in the water glass. The cementing material can be prepared by directly milling mortar in waste cement concrete or waste cement mortar products, the hardened cement slurry does not need to be separated from sand in the preparation process, and thus, the method is simple and low in energy consumption; and the cementing material has the advantages of high setting speed, moderate strength, low shrinkage and favorable corrosion resistance.
Description
Technical field
The invention belongs to material of construction and solid waste resource recovery field, relate to the concrete regenerative use technology of a kind of waste cement, specifically relate to a kind of utilization regenerative gel material that from waste cement concrete prepared by isolated discarded hardened cement mortar and preparation method thereof.
Background technology
The concrete disposal of waste cement and utilization have become the problem of global concern, and waste cement concrete was made landfill disposal more in the past, land occupation, contaminate environment, waste resource.People start to pay close attention to the concrete regeneration of waste cement in recent years, are mainly to prepare regeneration aggregate to substitute natural aggregate.But owing to containing sand-cement slurry in regeneration aggregate, its intensity is low, porosity is high, water-intake rate is large, affects concrete performance, and the thinner hardened cement mortar of particle sieving out in regeneration aggregate preparation can not effectively utilize.If by the levigate hardened cement mortar raw material as produced in conventional processes cement clinker, because grindability and the burn-ability of fine aggregate are wherein low, can cause cement clinker quality to decline.Though also someone proposes the cement slurry in waste cement concrete to separate, levigate as gelling material use after thermal treatment under certain temperature, there is the problem that separating technology complexity, dust pollution and cost are higher.
Summary of the invention
the technical problem solving:the present invention is directed to the problem that above-mentioned prior art exists, propose a kind of without hardened cement paste is separated with fine aggregate, directly utilize in waste cement concrete regenerative gel material that discarded hardened cement mortar is main raw material and preparation method thereof, this gelling material intensity is high, shrink little, good endurance.
technical scheme:regeneration hardened cement mortar powder gelling material, contains following composition by mass parts: 25 ~ 35 parts, 55 ~ 75 parts, discarded hardened cement mortar, 25 ~ 45 parts of phosphorus slags, 1.0 ~ 3.5 parts, sodium hydroxide, 4 ~ 10 parts of water glass, 0.4 ~ 1.0 part, tartrate, 0.5 ~ 1.2 part of water reducer and water; The deal of described water glass is with the solid content meter in water glass, described water comprise in water glass with liquid water.
Regeneration hardened cement mortar powder gelling material described above, contains following composition by mass parts: 27 ~ 32 parts, 60 ~ 70 parts, discarded hardened cement mortar, 30 ~ 40 parts of phosphorus slags, 1.5 ~ 3.0 parts, sodium hydroxide, 5 ~ 8 parts of water glass, 0.5 ~ 0.8 part, tartrate, 0.7 ~ 1.0 part of water reducer and water; The deal of described water glass is with the solid content meter in water glass, described water comprise in water glass with liquid water.
Discarded hardened cement mortar described above be isolated from waste cement concrete or by other waste cement mortar product broken hardened cement mortar.
Original cement mortar rate >=0.4 of discarded hardened cement mortar described above.
Phosphorus slag described above is for meeting the granulation electric furnace phosphoric slag of the above technical indicator of GB/T 26751 regulation L70 level (containing).
Water glass described above is that modulus is 2.2～3.5, the sodium silicate water glass of solid content >=25%wt.
Water reducer described above is high efficiency water reducing agent or the high-performance water reducing agent that meets GB8076 technical indicator.
The preparation method of regeneration hardened cement paste gelling material described above, the preparation process of the method is as follows:
The first step: will discard hardened cement mortar particle and dry 40 ~ 100min at 200～550 DEG C, and then obtain specific surface area>=380 m with phosphorus slag intergrinding
2the discarded petrifying water mortar powder of/kg and the composite powder of phosphorus slag powder;
Second step: by sodium hydroxide, water glass and water mix and blend, sodium hydroxide is dissolved completely, be prepared into dilution water glass;
The 3rd step: composite powder and the dilution water glass of discarded petrifying water mortar powder and phosphorus slag powder are poured into after stirrer mix and blend 30 s, pour water reducer and tartrate into stirrer again, continue to stir, the hardened cement mortar powder gelling material that obtains regenerating also can add required cementing sandstone aggregate to stir together use simultaneously.
Hardened cement mortar powder of the present invention mainly contains hydrolysis product of cement and quartzy fine sand powder.Hydrolysis product of cement drying and dewatering after product under the alkaline excitation of sodium hydroxide and water glass again aquation form gelling product; Quartz sand fine powder can regulate the time of coagulation of gelling material, also can to a certain degree form gelling hydrated product with sodium hydroxide, water glass and calcium hydroxide reaction, can play the effect of micro-aggregate, reduce gelling material and shrink, improve the splitting resistance of gelling material simultaneously; Water glass had both had strong alkalescence, rise alkali excitation, contemporaneously silica anion radical also can with hardened cement mortar powder reaction gel product; Granulation electric furnace phosphoric slag powder has very high and activity alkali reaction, can with sodium hydroxide, water glass and the calcium hydroxide reaction discharging from hardened cement paste, form the very strong hydrated product of gelling; Water reducer can reduce regenerative gel material moulding water requirement, improves its consolidation strength of material; Tartrate can delay condensing of regenerative gel material, improves its workability.
beneficial effect:
The direct entirety of the present invention utilize in waste cement concrete, separate hardened cement mortar prepare regenerative gel material as main raw material, do not need hardened cement paste to separate with fine aggregate, both can realize the utilization of discarded concrete maximum resource, reduce discarded concrete landfill to appropriation of land, can reduce again the dust pollution that hardened cement paste and fine aggregate sepn process produce, simplify gelling material preparation technology;
2. regeneration hardened cement mortar powder gelling material moderate strength of the present invention, shrinks lowly, and solidity to corrosion is good, can directly use as gelling material, and its composition and performance are adjustable flexibly, are easy to control, and suitability is good.
Embodiment
Below by the mode of embodiment, technical solution of the present invention is elaborated, but protection scope of the present invention is not limited to described embodiment.Described in each embodiment, granulation electric furnace phosphoric slag is L75 level, and the mass parts of described water glass is with the solid content meter in water glass, described water comprise in water glass with liquid water; Regenerative gel material time of coagulation, cement mortar strength and resistance to sulphate attack are all measured by the corresponding touchstone method of general cement.
embodiment 1
Discarded hardened cement mortar is taken from waste cement mortar, original cement mortar rate 1:2, and water reducer is FDN-I, the modulus of water glass is 2.5.Each components in mass portion is: 70 parts, discarded hardened cement mortar, 30 parts of granulation electric furnace phosphoric slags, 1.5 parts, sodium hydroxide, 7 parts of water glass, 0.5 part, tartrate, 0.5 part of water reducer, 32 parts, water.
The preparation method of regenerating waste hardened cement mortar powder gelling material of the present invention is: will discard hardened cement mortar particle and dry 100min at 200 DEG C, then obtaining specific surface area with phosphorus slag intergrinding 100 min is 450 m
2the discarded hardened cement mortar powder of/kg and the composite powder of phosphorus slag powder; By sodium hydroxide, water glass and water mix and blend, sodium hydroxide is dissolved completely, be prepared into dilution water glass; Composite powder and the dilution water glass of discarded hardened cement mortar powder and phosphorus slag powder are poured into after stirrer mix and blend 30 s, then poured water reducer and tartrate into stirrer, continue to stir, hardened cement mortar powder gelling material obtains regenerating.
embodiment 2
Discarded hardened cement mortar is taken from waste cement concrete, original cement mortar rate 1:1.5, and water reducer is high-efficiency water-reducing agent of poly-carboxylic acid, the modulus of water glass is 3.2.Each components in mass portion is: 70 parts, discarded hardened cement mortar, 30 parts of granulation electric furnace phosphoric slags, 2 parts, sodium hydroxide, 8 parts of water glass, 0.6 part, tartrate, 0.7 part of water reducer, 30 parts, water.
The preparation method of regenerating waste hardened cement mortar powder gelling material of the present invention is: will discard hardened cement mortar particle and dry 50min at 500 DEG C, then obtaining specific surface area with phosphorus slag intergrinding 90 min is 425 m
2the discarded hardened cement mortar powder of/kg and the composite powder of phosphorus slag powder; By sodium hydroxide, water glass and water mix and blend, sodium hydroxide is dissolved completely, be prepared into dilution water glass; Composite powder and the dilution water glass of discarded hardened cement mortar powder and phosphorus slag powder are poured into after stirrer mix and blend 30 s, then poured water reducer and tartrate into stirrer, continue to stir, hardened cement mortar powder gelling material obtains regenerating.
embodiment 3
Discarded hardened cement paste is taken from waste cement concrete, original cement mortar rate 1:1.5, and water reducer is melamine high-efficiency water-reducing agent, the modulus of water glass is 2.8.Each components in mass portion is: 65 parts, discarded hardened cement mortar, 35 parts of granulation electric furnace phosphoric slags, 2.5 parts, sodium hydroxide, 6 parts of water glass, 0.8 part, tartrate, 0.6 part of water reducer, 28 parts, water.
The preparation method of regenerating waste hardened cement mortar powder gelling material of the present invention is: will discard hardened cement mortar particle and at 350 DEG C, dry 80 min, then obtaining specific surface area with phosphorus slag intergrinding 60 min is 385 m
2the discarded hardened cement mortar powder of/kg and the composite powder of phosphorus slag powder; By sodium hydroxide, water glass and water mix and blend, sodium hydroxide is dissolved completely, be prepared into dilution water glass; Composite powder and the dilution water glass of discarded hardened cement mortar powder and phosphorus slag powder are poured into after stirrer mix and blend 30 s, then poured water reducer and tartrate into stirrer, continue to stir, hardened cement mortar powder gelling material obtains regenerating.
embodiment 4
Discarded hardened cement paste is taken from waste cement concrete, original cement mortar rate 1:2, and water reducer is melamine high-efficiency water-reducing agent, the modulus of water glass is 2.7.Each components in mass portion is: 65 parts, discarded hardened cement mortar, 35 parts of granulation electric furnace phosphoric slags, 3 parts, sodium hydroxide, 5 parts of water glass, 0.7 part, tartrate, 0.9 part of water reducer, 28 parts, water.
The preparation method of regenerating waste hardened cement mortar powder gelling material of the present invention is: will discard hardened cement mortar particle and at 400 DEG C, dry 60 min, then obtaining specific surface area with phosphorus slag intergrinding 70 min is 405 m
2the discarded hardened cement mortar powder of/kg and the composite powder of phosphorus slag powder; By sodium hydroxide, water glass and water mix and blend, sodium hydroxide is dissolved completely, be prepared into dilution water glass; Composite powder and the dilution water glass of discarded hardened cement mortar powder and phosphorus slag powder are poured into after stirrer mix and blend 30 s, then poured water reducer and tartrate into stirrer, continue to stir, hardened cement mortar powder gelling material obtains regenerating.
embodiment 5
Discarded hardened cement paste is taken from waste cement mortar product, original cement mortar rate 1:2.5, and water reducer is high-efficiency water-reducing agent of poly-carboxylic acid, the modulus of water glass is 3.2.Each components in mass portion is: 60 parts, discarded hardened cement mortar, 40 parts of granulation electric furnace phosphoric slags, 2.5 parts, sodium hydroxide, 7 parts of water glass, 0.6 part, tartrate, 0.8 part of water reducer, 29 parts, water.
The preparation method of regenerating waste hardened cement mortar powder gelling material of the present invention is: will discard hardened cement mortar particle and dry 50 min at 550 DEG C, then obtaining specific surface area with phosphorus slag intergrinding 80 min is 420 m
2the discarded hardened cement mortar powder of/kg and the composite powder of phosphorus slag powder; By sodium hydroxide, water glass and water mix and blend, sodium hydroxide is dissolved completely, be prepared into dilution water glass; Composite powder and the dilution water glass of discarded hardened cement mortar powder and phosphorus slag powder are poured into after stirrer mix and blend 30 s, then poured water reducer and tartrate into stirrer, continue to stir, hardened cement mortar powder gelling material obtains regenerating.
embodiment 6
Discarded hardened cement paste is taken from waste cement concrete, original cement mortar rate 1:1.5, and water reducer is high-efficiency water-reducing agent of poly-carboxylic acid, the modulus of water glass is 3.0.Each components in mass portion is: 60 parts, discarded hardened cement mortar, 40 parts of granulation electric furnace phosphoric slags, 3 parts, sodium hydroxide, 8 parts of water glass, 0.8 part, tartrate, 0.6 part of water reducer, 27 parts, water.
The preparation method of regenerating waste hardened cement mortar powder gelling material of the present invention is: will discard hardened cement mortar particle and dry 40 min at 550 DEG C, then obtaining specific surface area with phosphorus slag intergrinding 70 min is 395 m
2the discarded hardened cement mortar powder of/kg and the composite powder of phosphorus slag powder; By sodium hydroxide, water glass and water mix and blend, sodium hydroxide is dissolved completely, be prepared into dilution water glass; Composite powder and the dilution water glass of discarded hardened cement mortar powder and phosphorus slag powder are poured into after stirrer mix and blend 30 s, then poured water reducer and tartrate into stirrer, continue to stir, hardened cement mortar powder gelling material obtains regenerating.
The time of coagulation, glue sand test specimen intensity, the coefficient of resistance to sulphate attack and the 56 days shrinking percentages that record embodiment 1 ~ 6 regeneration hardened cement mortar powder gelling material by general cement respective standard test method, the results are shown in following table.
Regeneration hardened cement mortar powder gelling material performance measurement result
Claims (5)
1. regeneration hardened cement mortar powder gelling material, is characterized in that containing following composition by mass parts: 25 ~ 35 parts, 55 ~ 75 parts, discarded hardened cement mortar, 25 ~ 45 parts of phosphorus slags, 1.0 ~ 3.5 parts, sodium hydroxide, 4 ~ 10 parts of water glass, 0.4 ~ 1.0 part, tartrate, 0.5 ~ 1.2 part of water reducer and water; The deal of described water glass is with the solid content meter in water glass, described water comprise in water glass with liquid water; Described discarded hardened cement mortar be isolated from waste cement concrete or by other waste cement mortar product broken hardened cement mortar; Original cement mortar rate >=0.4 of described discarded hardened cement mortar; Described phosphorus slag is for meeting the granulation electric furnace phosphoric slag of the above technical indicator of GB/T 26751 regulation L70 level (containing).
2. regeneration hardened cement mortar powder gelling material according to claim 1, is characterized in that containing following composition by mass parts: 27 ~ 32 parts, 60 ~ 70 parts, discarded hardened cement mortar, 30 ~ 40 parts of phosphorus slags, 1.5 ~ 3.0 parts, sodium hydroxide, 5 ~ 8 parts of water glass, 0.5 ~ 0.8 part, tartrate, 0.7 ~ 1.0 part of water reducer and water; The deal of described water glass is with the solid content meter in water glass, described water comprise in water glass with liquid water.
3. regeneration hardened cement mortar powder gelling material according to claim 1, is characterized in that described modulus of water glass is 2.2～3.5, the sodium silicate water glass of solid content >=25%wt.
4. regeneration hardened cement mortar powder gelling material according to claim 1, is characterized in that described water reducer is high efficiency water reducing agent or the high-performance water reducing agent that meets GB8076 technical indicator.
5. the preparation method of regeneration hardened cement mortar powder gelling material as claimed in claim 1, is characterized in that the preparation process of the method is as follows:
The first step: will discard hardened cement mortar particle and dry 40 ~ 100min at 200～550 DEG C, and then obtain specific surface area>=380 m with phosphorus slag intergrinding
2the discarded petrifying water mortar powder of/kg and the composite powder of phosphorus slag powder;
Second step: by sodium hydroxide, water glass and water mix and blend, sodium hydroxide is dissolved completely, be prepared into dilution water glass;
The 3rd step: composite powder and the dilution water glass of discarded petrifying water mortar powder and phosphorus slag powder are poured into after stirrer mix and blend 30 s, then poured water reducer and tartrate into stirrer, continue to stir, hardened cement mortar powder gelling material obtains regenerating.
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| CN106431037B (en) * | 2016-09-19 | 2018-07-06 | 哈尔滨工业大学 | A kind of method for improving alkali--activated slag cement and shrinking |
| CN109678371A (en) * | 2019-01-04 | 2019-04-26 | 铜陵上峰水泥股份有限公司 | A kind of phosphoric slag cement and its production technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101891448A (en) * | 2010-05-07 | 2010-11-24 | 武汉理工大学 | Cement-base quick repairing material and preparation method thereof |
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| CN101891448A (en) * | 2010-05-07 | 2010-11-24 | 武汉理工大学 | Cement-base quick repairing material and preparation method thereof |
Non-Patent Citations (2)
| Title |
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| "磷渣掺合料对水泥混凝土性能影响的试验研究";冷发光等;《湖北水利发电》;19881231(第3期);第43-47页 * |
| 冷发光等."磷渣掺合料对水泥混凝土性能影响的试验研究".《湖北水利发电》.1988,(第3期),第43-47页. * |
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