CN1260166C - Water-proof gypsum block - Google Patents

Water-proof gypsum block Download PDF

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Publication number
CN1260166C
CN1260166C CNB031028047A CN03102804A CN1260166C CN 1260166 C CN1260166 C CN 1260166C CN B031028047 A CNB031028047 A CN B031028047A CN 03102804 A CN03102804 A CN 03102804A CN 1260166 C CN1260166 C CN 1260166C
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CN
China
Prior art keywords
gypsum
water
block
cement
gypsum block
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CNB031028047A
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Chinese (zh)
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CN1425630A (en
Inventor
刘晓莉
丁宏
张莉
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INST OF BUILDING MATERIAL XINJIANG UYGUR AUTONOMOUS REGION
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INST OF BUILDING MATERIAL XINJIANG UYGUR AUTONOMOUS REGION
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Priority to CNB031028047A priority Critical patent/CN1260166C/en
Publication of CN1425630A publication Critical patent/CN1425630A/en
Application granted granted Critical
Publication of CN1260166C publication Critical patent/CN1260166C/en
Anticipated expiration legal-status Critical
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/14—Compositions 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 calcium sulfate cements
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/20—Resistance against chemical, physical or biological attack
    • C04B2111/27—Water resistance, i.e. waterproof or water-repellent materials
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

The present invention relates to an improved gypsum building product, particularly to a water-proof gypsum block. The gypsum block is made from the raw materials of gypsum, slag, cement, fly ash and silica fume by the following steps: the raw materials are crushed into fine powder, proportioned according to a formulation and uniformly stirred, material is made by adding water and stirring the mixture, the slurry is molded by casting, and the block is demoulded, sprayed with water and conserved. In the present invention, industrial waste materials, such as cement, slag, fly ash, silica fume and the like are added to the building gypsum, the waterproof properties of the gypsum block can be largely enhanced, product cost is reduced, waste is changed to valuables, and ecological environment is protected. The gypsum block not only can be widely popularized and applied in gypsum block production lines having high automation degree and strict technological parameter control, but also can be applied to gypsum block production equipment having simple process and poor equipment conditions. The gypsum block has high use value.

Description

Water-proof plaster block
Technical field: the present invention is the improvement of gypsum building products, particularly water-proof plaster block.
Background technology: gypsum block is to use materials for wall more widely at building field, and production technology, operating technique comparative maturity all.Gypsum block is subjected to people's attention and likes with distinguishing features such as its lightweight, heat insulating, sound insulation, easy constructions.
But the important factor that limits its development is the quality of product, is embodied on self air hardening characteristic of gypsum, i.e. poor water resistance.Manufacturing enterprise's product coefficient of softening index has limited its widespread use aspect the construction work body of wall generally below 0.5, also is the great difficult problem that manufacturing enterprise needs to be resolved hurrily.Because the poor water resistance of gypsum material, gypsum block show higher air-setting, and when its water-intake rate was in state of saturation, its loss of strength can reach 60% when drying regime, even bigger.
Summary of the invention: the object of the present invention is to provide a kind of water-proof plaster block, in plaster of Paris, mix cement and industrial waste and can improve the water resistance of gypsum block greatly, and reduce product cost, turn waste into wealth, preserve the ecological environment.
Solution of the present invention is: a kind of water-proof plaster block comprises plaster of Paris, slag, flyash, silicon ash, cement.The composition range of this water-proof plaster block is (weight percent):
Plaster of Paris 60-90%, slag 3-20%, cement 3-15%, flyash 0-15%, silicon ash 0-15%, flyash and silicon ash are not zero simultaneously.
The composition range of the preferential selection of water-proof plaster block is (weight percent):
Plaster of Paris 60-80%, slag 5-15%, cement 5-8%, flyash 0-10%, silicon ash 0-10%, flyash and silicon ash are not zero simultaneously.
The optimum composition of water-proof plaster block is (weight percent):
Plaster of Paris 60%, slag 15%, cement 5%, flyash 10%, silicon ash 10%.
Raw-material selection:
1, plaster of Paris is a beta-type semi-hydrated gypsum, and powdery density is 1100Kg/m 3, fineness 3.2%, presetting period 20min, final setting time 25min, ultimate compression strength 10.5MPa, folding strength 4.4MPa.
2, cement is No. 425 ordinary Portland cements, and fineness 4900 hole sizers tail over less than 10% specific surface area 320m 2About/Kg.
3, flyash is industrial solid castoff, its density 2.16g/cm 3, aerated density 820g/m 3, fineness 4900 hole sizers tail over 8%.Its chemical ingredients is: LOSS-2.34%, SiO 2-61.49%, Al 2O 3-22.12%, Fe 2O 3-6.41%, CaO-1.63%, MgO-1.91%, SO 3-0.38%, K 2O-2.59%, Na 2O-0.62%.
4, slag is an industrial solid castoff, and its density is 1200Kg/m 3, fineness requirement 4900 hole sizer screen over-sizes are less than 10%.Its chemical ingredients is: LOSS-1.36%, SiO 2-34.80%, Al 2O 3-9.67%, Fe 2O 3-1.78%, CaO-40.69%, MgO-8.64%.
5, the silicon ash is an industrial solid castoff, its dry capacity 300Kg/m 3, specific surface area 490m 2/ Kg.Its chemical ingredients is: SiO 2-94.00%, Al 2O 3-0.40%, Fe 2O 3-0.15%, CaO-0.30%, MgO-0.90%.
The production method of water-proof plaster block:
1, prepares burden by prescription of the present invention, stir then;
2, in the dry mix that stirs, add water and stir, form uniform slip;
3, casting is poured into a mould slip in the holllow building block mould of belt carcass, be 5-8min from being poured into the excellent time that begins to loose core, and makes the building block stripping forming;
4, maintenance: adopt on-the-spot open-air maintenance, stripping forming began the maintenance of sprinkling water after 24 hours, kept certain humidity, and maintenance is after 3 days, with segment palletizing.
Have cement and industrial residue in the prescription of water-proof plaster block of the present invention: slag, flyash, silicon ash.Except that gypsum self aquation produces the crystal formation certain intensity, mainly be hydrated product CaSO 42H 2O and hydrated cementitious product C a (OH) 2With the active SiO in the industrial residue 2, Al 2O 3Reaction, generation has the hydrated calcium silicate and the drated calcium aluminate of certain intensity and the xln-ettringite that generates a kind of super-strength effect.The intensity of this hydrated product is all much bigger than the crystalline texture net of dihydrate gypsum with stability, can improve the water resistance of gypsum material largely.Its hydration reaction equation is as follows: 。
Owing to be added with industrial waste in the prescription of the present invention, make dead meal obtain utilizing, reduced production cost, protected ecotope.
Table 1 is the physical performance index synopsis of water-proof plaster block of the present invention and gypsum block
Table 1
Sample number into spectrum The prescription of gypsum block Coefficient of softening Ultimate compression strength MPa Folding strength MPa Water-intake rate (%)
11-16 Pure gypsum 0.36 11.60 4.2 34.0
11-8 All the other are plaster of Paris for 425# cement 5% slag 15% silicon ash 10% 0.93 10.7 3.4 6.0
11-10 All the other are plaster of Paris for 425# cement 5% flyash 10% silicon ash 10% slag 15% 0.81 10.7 2.8 8.0
11-13 All the other are plaster of Paris for 425# cement 10% flyash 10% slag 20% 0.96 15.2 1.6 9.0
From the experimental result of table 1 as can be seen, after adding cement, flyash, slag, silicon ash in the prescription of the present invention, performance impact to gypsum material is bigger, can improve the coefficient of softening 108%-167% of gypsum material, reduce water-intake rate 35-82%, ultimate compression strength remains unchanged substantially, and the ultimate compression strength of 11-13 sample increases by 30%.
Table 2 is water-proof plaster block of the present invention and gypsum block unit weight synopsis
Table 2
Sample number into spectrum The prescription of gypsum block Unit weight (Kg/m 3)
11-16 Pure gypsum 1130
11-8 Cement 5%, slag 15%, silicon ash 10%, all the other are plaster of Paris 1480
11-10 Cement 5%, flyash 10%, silicon ash 10%, slag 15%, all the other are plaster of Paris 1440
11-13 Cement 10%, flyash 10%, slag 20%, all the other are plaster of Paris 1560
It is about 30% that the unit weight of the pure gypsum block of volume to weight ratio of gypsum block of the present invention has improved, and along with the increase of cement mixed weight and the different unit weights of industrial waste have certain variation.
The product performance test
The pilot scale water-proof plaster block is detected by Xinjiang building materials non-metallic products quality monitoring testing station, and its every performance index are better than domestic like product, see table 3 for details
Table 3
Sample number into spectrum of the present invention Mass area ratio (kg/m 2) Crushing load (N) Coefficient of softening Resistance to impact shock
Drying regime Full water state
11-10 60.4 2417 1980 0.82 Qualified
11-13 63.2 3702 3138 0.85 Qualified
The construction application situation
Interim test product 1000m of the present invention 2, carried out the engineering pilot at the academic complex building of Xinjiang College of Education and used, received good effect.This pilot product is installed on the toilet internal partition wall of complex building, and its planeness, size deviation and physical and mechanical property all can satisfy on-the-spot installation, and its water resistance is subjected to the favorable comment of unit in charge of construction.
The present invention not only can apply on the strict gypsum block production line of level of automation height, processing parameter control, and can be simple in technology, use on the gypsum block production unit of appointed condition difference, have very high use value.
Embodiment:
The prescription of water-proof plaster block embodiment 1 is (weight percent):
Plaster of Paris 60%, slag 15%, cement 5%, flyash 10%, silicon ash 10%.
The prescription of water-proof plaster block embodiment 2 is (weight percent):
Slag 15%, cement 5%, silicon ash 10%, all the other are plaster of Paris.
The prescription of water-proof plaster block embodiment 3 is (weight percent):
Slag 15%, cement 5%, flyash 10%, silicon ash 10%, all the other are plaster of Paris.
The prescription of water-proof plaster block embodiment 4 is (weight percent):
Slag 20%, cement 10%, flyash 10%, all the other are plaster of Paris.
Production method is as follows:
1,, stirs in the adding stirrer by the prescription batching;
2, in compound, add water and stir, form uniform slip;
3, casting is poured into a mould slip in the holllow building block mould of belt carcass, be 6min from being poured into the excellent time that begins to loose core, and makes the building block stripping forming;
4, maintenance, curing temperature are between 18-30 ℃, and after 24 hours, watering keeps certain humidity from moulding, and the watering maintenance is after 3 days, and segment palletizing is total to maintenance 14 days, the secondary of sprinkling water every day.This experimental period is summer, and moisture evaporation is very fast, and is too fast for preventing moisture evaporation, adopts local covering curing.

Claims (5)

1, a kind of water-proof plaster block is characterized in that its material composition scope is (weight percent):
Plaster of Paris 60-90%, slag 3-20%, cement 3-15%, flyash 0-15%, silicon ash 0-15%, flyash and silicon ash are not zero simultaneously.
2, water-proof plaster block according to claim 1, it is characterized in that wherein the weight percent of each raw material is: plaster of Paris 60-80%, slag 5-15%, cement 5-8%, flyash 0-10%, silicon ash 0-10%, flyash and silicon ash are not zero simultaneously.
3, water-proof plaster block according to claim 1 is characterized in that wherein the weight percent of each raw material is: plaster of Paris 60%, slag 15%, cement 5%, flyash 10%, silicon ash 10%.
4, water-proof plaster block according to claim 1 is characterized in that wherein the weight percent of each raw material is: plaster of Paris 70%, slag 15%, cement 5%, silicon ash 10%.
5, water-proof plaster block according to claim 1 is characterized in that wherein the weight percent of each raw material is: plaster of Paris 60%, slag 20%, cement 10%, flyash 10%.
CNB031028047A 2003-01-14 2003-01-14 Water-proof gypsum block Expired - Fee Related CN1260166C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNB031028047A CN1260166C (en) 2003-01-14 2003-01-14 Water-proof gypsum block

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNB031028047A CN1260166C (en) 2003-01-14 2003-01-14 Water-proof gypsum block

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CN1425630A CN1425630A (en) 2003-06-25
CN1260166C true CN1260166C (en) 2006-06-21

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102180647A (en) * 2011-01-28 2011-09-14 内蒙古科技大学 Desulfurized building gypsum water-proof building block
CN106365580B (en) * 2016-09-26 2018-08-24 王远国 Composite modified gypsum block and preparation method thereof
CN111268984A (en) * 2019-12-11 2020-06-12 湖北田鑫建材有限公司 Phosphogypsum building block and preparation method thereof
CN111533523A (en) * 2020-05-08 2020-08-14 张延年 High-strength desulfurized gypsum block and preparation method thereof

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Granted publication date: 20060621

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