CN101538139B - Dry-mixed mortar with waste stone dust in stone mining and processing plant as aggregate and filler - Google Patents

Dry-mixed mortar with waste stone dust in stone mining and processing plant as aggregate and filler Download PDF

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Publication number
CN101538139B
CN101538139B CN2009100494246A CN200910049424A CN101538139B CN 101538139 B CN101538139 B CN 101538139B CN 2009100494246 A CN2009100494246 A CN 2009100494246A CN 200910049424 A CN200910049424 A CN 200910049424A CN 101538139 B CN101538139 B CN 101538139B
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CN
China
Prior art keywords
dry
stone dust
waste
waste stone
stone
Prior art date
Application number
CN2009100494246A
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Chinese (zh)
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CN101538139A (en
Inventor
孙振平
肖建庄
陈柯柯
庞敏
郑金飚
罗琼
Original Assignee
同济大学
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Priority to CN2009100494246A priority Critical patent/CN101538139B/en
Publication of CN101538139A publication Critical patent/CN101538139A/en
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Publication of CN101538139B publication Critical patent/CN101538139B/en

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/04Portland cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2103/00Function or property of ingredients for mortars, concrete or artificial stone
    • C04B2103/46Water-loss or fluid-loss reducers, hygroscopic or hydrophilic agents, water retention agents
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00017Aspects relating to the protection of the environment
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/34Non-shrinking or non-cracking materials
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02WCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00Technologies for solid waste management
    • Y02W30/50Reuse, recycling or recovery technologies
    • Y02W30/91Use of waste materials as fillers for mortars or concrete

Abstract

The invention belongs to the technical field of civil engineering material, specifically relates to a dry-mixed mortar with waste stone dust in stone mining and processing plant as aggregate and filler. The dry-mixed mortar is composed of 0.08-5mm of waste stone dust, 0-0.08 mm of waste stone dust, cement, fly ash, metakaolin, calcium hydroxide and water holding thickening agent; with the dry-mixed mortar of the invention adopted, the waste stone dust accounting for 55-75% of the weight of the mortar product can be recycled, thus being environmentally friendly and ecologically friendly. The dry-mixed mortar of the invention not only makes good use of waste material but also features good environmental protection; in addition, the mortar features good water retention rate, fine Constructability, high index of strength and durability, low shrinkage factor and certain crack-resistant property. With all the advantages, the product of the invention can be widely applied to plastering, masonry and land disposal of civil engineering projects of all types.

Description

A kind of is the dry-mixed mortar with filler of gathering materials with waste stone dust in stone mining and processing plant
Technical field
The invention belongs to civil engineering material technical field, being specifically related to a kind of is the dry-mixed mortar with filler of gathering materials with waste stone dust in stone mining and processing plant.
Background technology
There is a large amount of exploitation of stone processing enterprises on ground such as China Fujian, Guangdong, Zhejiang, Shaanxi, Shanxi, Guangxi, Shandong, Xinjiang; These enterprises processed for national economic development exploitation be used for the stone material of structure load-bearing and decoration in a large number after; Destroyed massif; Leave over down simultaneously the waste solid that is difficult to dispose, promptly a large amount of stone flours.Competent authorities of country and local government call on urgently and must find practical measures, the stone flour that effectively utilizes these to do great damage over against environment.
The waste stone dust that produces by exploitation of stone processing; Its particle diameter is generally 0-50mm; Wherein the above particle of 5mm can be used for concrete coarse aggregate; And the fine aggregate below the 5mm is when being used for concrete, and often to the concrete performance deleterious impact, concrete production enterprise would rather adopt natural sand as fine aggregate.Therefore, the comprehensive utilization of resources of the following stone flour of 5mm remains a great problem.In fact, building mortar can suitably reduce for the specification of quality of sand.
For accelerating the energy-saving and emission-reduction of Building Trade in China; Promote the construction of harmonious society; On June 6th, 2007, six ministries and commissions such as China Department of Commerce, the Ministry of Public Security, the Ministry of Construction, State Administration of Quality Supervision, Inspection and Quarantine and Environmental Protection Administration unite and issued " about in the part city time limit forbid the on-the-spot notice that stirs mortar working " (merchant sends elsewhere [2007] No. 205), use the time in 3 years; Promote the general goods mortar step by step in 127 cities, the whole nation; That is to say that the building mortar in these cities will be the same with concrete, carry out centralized production and supply.
Summary of the invention
The object of the present invention is to provide a kind of is to gather materials and the starching in mulling of filler with waste stone dust in stone mining and processing plant.
What the present invention proposed is the dry-mixed mortar with filler of gathering materials with waste stone dust in stone mining and processing plant, is made up of 0.08m-5mm waste stone dust, 0-0.08mm waste stone dust, cement, flyash, metakaolin, calcium hydroxide and water-retaining admixture, and the weight ratio of each component is:
0.08mm-5mm waste stone dust 100
0-0.08mm waste stone dust 2-17
Cement 20-50
Flyash 8-15
Metakaolin 5-12
Calcium hydroxide 1.5-4.5
Water-retaining admixture 1-9.
The preferable weight ratio of each component is:
0.08mm-5mm waste stone dust 100
0-0.08mm waste stone dust 3-12
Cement 25-50
Flyash 9-14
Metakaolin 6-10
Calcium hydroxide 2-4
Water-retaining admixture 1-7.
Among the present invention, said water-retaining admixture is that wilkinite, sepiolite, zeyssatite, smectite or ether of cellulose are to several kinds in the batch production product formed of starting material, and it is grey to beige powder .
Preparing method of the present invention is: by aforementioned each part by weight weighing each component; 0.08-5mm waste stone dust, 0-0.08mm waste stone dust, cement, flyash, metakaolin, calcium hydroxide and water-retaining admixture added in the mixing machine successively stir, the time is 5-7min.Obtain the product of inventing.
Among the present invention, the 0.08mm-5mm waste stone dust obtains after adopting the waste stone dust of exploitation of stone source mill to sieve, and its silt content is controlled in 3%.0.08mm-5mm waste stone dust is an inert particle, it is to play the skeleton function that gathers materials in the mulling slurry.0-0.08mm waste stone dust obtains after adopting the waste stone dust of exploitation of stone source mill to sieve, its silt content is controlled in 5%.0-0.08mm waste stone dust is an inert particle, it plays the effect that filling concrete, flyash and metakaolin are piled up the space, back in dry-mixed mortar, helps to reduce the shrinking percentage and its weather resistance of enhancing of dry-mixed mortar.Cement adopts a kind of in 42.5 grades of ordinary Portland cements or the 32.5 grades of ordinary Portland cements.Cement is a kind of as gelling material, will issue the unboiled water reflection in the situation that mixing water exists with flyash, metakaolin, forms hydraulicity hydrated product, and will gather materials bonds together, and is formed with the integral body of intensity.Flyash adopts a kind of in II level F class and the C class, requires its loss on ignition to be not more than 8%.It is active that flyash has good secondary pozzolanic reaction; It is in mortar adds 7-28 days after water is smeared (building); Can a large amount of hydration reactions take place with the calcium hydroxide that uses in calcium hydroxide in the hydrated cementitious product and the present invention's prescription; Form hydrated calcium silicate gel and ettringite, improve the intensity of mortar.Metakaolin is the product of kaolin after calcining under the 600-900 ℃ of condition, and its main chemical compositions is the SiO that has chemical reactivity at normal temperatures and pressures 2And Al 2O 3Its effect in product of the present invention is similar with flyash on the one hand; And on the other hand; Because it has vesicular structure, helps to improve the cohesiveness and the water-retentivity of mortar mixture, because its existence; The consumption of water-retaining admixture can suitably reduce in the formula for a product of the present invention, and the benefit of bringing is mortar strength and the cost that reduces mortar of influencing within reason.Calcium hydroxide is technical grade product, requires quicklime and Natural manganese dioxide total content greater than 65%, and volume stability is qualified, and 0.125mm tails over and is not more than 3%.The existence of calcium hydroxide can improve the early strength of product of the present invention to exciting the active very helpful of flyash and metakaolin, and opposing is cracking in early days.The effect of water-retaining admixture is the cohesiveness that the effect of and Van der Waals force strong through bridge improves cement-flyash-metakaolin slurry system; Guarantee that the mortar mixture does not produce layering, segregation and bleeding in depositing process; And guarantee mortar smear in the process smooth property with smear after anti-tenesmus property, the existence of water-retaining admixture also helps to improve the cohesive strength between mortar and the basic unit.
The present invention catches the city to produce and apply the good chance of commodity mortar; Adopt waste stone dust in stone mining and processing plant for gathering materials and filler, develop workability and water-retentivity is good, intensity, contract with dry rate, the satisfactory dry-mixed mortar of durability index; Not only gather materials in this mortar and all adopt waste stone dust; But also utilize part barren rock powder as filler, dry-mixed mortar recycling 750-550Kg waste stone dust per ton is an example with an enterprise that produces 300000 tons of dry-mixed mortars per year; Ten thousand tons of waste stone dust of annual recycling 22.5-16.5, its economy, environment and social benefit are quite obvious.
The present invention for a kind of be the dry-mixed mortar with filler of gathering materials with waste stone dust in stone mining and processing plant owing to utilized the waste stone dust that accounts for mortar product weight 55%-75%, have the good feature of environmental protection and ecological property.The not only sharp wasted energy power of this dry-mixed mortar is strong, and the feature of environmental protection is excellent, and its water retention is good, but application property is strong, intensity, durability index height.The shrinking percentage of this mortar is low, has certain splitting resistance.Product application scope of the present invention is wide, generally is applicable to plastering, build by laying bricks or stones and floor treatment of various civil engineering works.
Embodiment
Further specify the present invention through embodiment below.
Embodiment 1, a kind ofly is the dry-mixed mortar with filler of gathering materials with waste stone dust in stone mining and processing plant, and is formulated by following weight ratio: 0.08mm-5mm waste stone dust 100; 0-0.08mm waste stone dust 3; 42.5 level ordinary Portland cement 25, F class flyash 14, metakaolin 10; Calcium hydroxide 4, water-retaining admixture 1.Behind this mortar blunge, denseness is 50mm, water retention 88%, and 7d intensity 26.8MPa, 28d intensity is 35.0MPa, and impervious grade is greater than S12, and the 28d cohesive strength is 0.6MPa, and shrinking percentage is 0.041%.
Embodiment 2, a kind ofly are the dry-mixed mortar with filler of gathering materials with waste stone dust in stone mining and processing plant, and is formulated by following weight ratio: 0.08mm-5mm waste stone dust 100; 0-0.08mm waste stone dust 12; 32.5 level ordinary Portland cement 50, C class flyash 9, metakaolin 6; Calcium hydroxide 2, water-retaining admixture 6.Behind this mortar blunge, denseness is 110mm, water retention 90%, and 7d intensity 17.6MPa, 28d intensity is 24.0MPa, and impervious grade is greater than S10, and the 28d cohesive strength is 0.5MPa, and shrinking percentage is 0.052%.
Embodiment 3, a kind ofly are the dry-mixed mortar with filler of gathering materials with waste stone dust in stone mining and processing plant, and is formulated by following weight ratio: 0.08mm-5mm waste stone dust 100; 0-0.08mm waste stone dust 8; 32.5 level ordinary Portland cement 40, C class flyash 9, metakaolin 10; Calcium hydroxide 3, water-retaining admixture 5.Behind this mortar blunge, denseness is 95mm, water retention 91%, and 7d intensity 12.0MPa, 28d intensity is 19.5MPa, and impervious grade is greater than S10, and the 28d cohesive strength is 0.5MPa, and shrinking percentage is 0.048%.
Embodiment 4, a kind ofly are the dry-mixed mortar with filler of gathering materials with waste stone dust in stone mining and processing plant, and is formulated by following weight ratio: 0.08mm-5mm waste stone dust 100; 0-0.08mm waste stone dust 9; 42.5 level ordinary Portland cement 45, F class flyash 10, metakaolin 8; Calcium hydroxide 3, water-retaining admixture 6.Behind this mortar blunge, denseness is 70mm, water retention 94%, and 7d intensity 15.0MPa, 28d intensity is 23.0MPa, and impervious grade is greater than S12, and the 28d cohesive strength is 0.7MPa, and shrinking percentage is 0.040%.

Claims (9)

1. one kind is to gather materials dry-mixed mortar with filler with waste stone dust in stone mining and processing plant; It is characterized in that being made up of 0.08mm-5mm waste stone dust, 0-0.08mm waste stone dust, cement, flyash, metakaolin, calcium hydroxide and water-retaining admixture, the weight ratio of each component is:
2. according to claim 1 is the dry-mixed mortar with filler of gathering materials with waste stone dust in stone mining and processing plant, it is characterized in that the each component weight ratio is:
3. according to claim 1 is the dry-mixed mortar with filler of gathering materials with waste stone dust in stone mining and processing plant, it is characterized in that obtaining after said 0.08mm-5mm waste stone dust adopts the waste stone dust screening of exploitation of stone source mill, and its silt content is controlled in 3%.
4. according to claim 1 is the dry-mixed mortar with filler of gathering materials with waste stone dust in stone mining and processing plant, it is characterized in that obtaining after the 0-0.08mm waste stone dust adopts the waste stone dust screening of exploitation of stone source mill, and its silt content is controlled in 5%.
5. according to claim 1 is the dry-mixed mortar with filler of gathering materials with waste stone dust in stone mining and processing plant, it is characterized in that cement adopts in 42.5 grades of ordinary Portland cements or the 32.5 grades of ordinary Portland cements any.
6. according to claim 1 is the dry-mixed mortar with filler of gathering materials with waste stone dust in stone mining and processing plant, it is characterized in that said flyash adopts in II level F class or the C class any, and its loss on ignition is not more than 8%.
7. according to claim 1 is the dry-mixed mortar with filler of gathering materials with waste stone dust in stone mining and processing plant, it is characterized in that said metakaolin is the product of kaolin after calcining under the 600-900 ℃ of condition.
8. according to claim 1 is the dry-mixed mortar with filler of gathering materials with waste stone dust in stone mining and processing plant; It is characterized in that said calcium hydroxide is technical grade product; Quicklime and Natural manganese dioxide total content are greater than 65%, and volume stability is qualified, and 0.125mm tails over and is not more than 3%.
9. according to claim 1 is the dry-mixed mortar with filler of gathering materials with waste stone dust in stone mining and processing plant, it is characterized in that said water-retaining admixture is in wilkinite, sepiolite, zeyssatite, smectite or the ether of cellulose one to several kinds.
CN2009100494246A 2009-04-16 2009-04-16 Dry-mixed mortar with waste stone dust in stone mining and processing plant as aggregate and filler CN101538139B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN101538139B true CN101538139B (en) 2012-01-25

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