CN100340519C - Sandwich wall board made by straw cement composite material and mfg. process thereof - Google Patents
Sandwich wall board made by straw cement composite material and mfg. process thereof Download PDFInfo
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- CN100340519C CN100340519C CNB2005101148948A CN200510114894A CN100340519C CN 100340519 C CN100340519 C CN 100340519C CN B2005101148948 A CNB2005101148948 A CN B2005101148948A CN 200510114894 A CN200510114894 A CN 200510114894A CN 100340519 C CN100340519 C CN 100340519C
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- wall board
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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
- 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
Abstract
The present invention discloses a sandwich wall board made from a straw and cement composite material and a manufacturing process thereof. The sandwich wall board is composed of a core board at the inner layer and surface layers at both sides, wherein the core board at the inner layer is formed by orderly mixing and pressing cement, pulverized coal ash, chopped straws and water; the surface layers has the materials of cement, sand, pulverized coal ash and broken straws which form a solid material, and then the solid material is mixed with a polymer and the water and then is cast into the surface layers by a vertical mould. In the manufacturing process, the core board is put in the mould cavity of the vertical mould after being independently formed by pressing, and then the materials of the surface layers are cast for curing. The sandwich wall board is formed in a vertical casting mode, has the advantages of smooth and flat surface and no exposure of the broken straws, the noise insulation factor reaches 41.5dB, the anti-bending load reaches 115 kg/m<2>, the internal exposure index I<Ra> of the specific activity of radioactive species is 0.23, the external exposure index I<r> is 0.53, and then the sandwich wall board is a high-grade non-combustible A-level decorative board surface.
Description
Technical field
The invention belongs to building material field, be specifically related to a kind of manufacture method that contains wallboard and this wallboard of wheat straw stalk.
Background technology
The wheat straw stalk is the waste of agriculture production, and the resource utilization of utilizing wheat straw stalk manufacturing sheet material to solve waste is utilized problem again.Prior art personnel utilize the wheat straw stalk to make composite sheet, introduce as utility model patent CN244014 " the wheat straw light wall material plate of plasterboard clad can ", on two outside surfaces of wheat straw board, be provided with plasterboard, in wheat straw board, be equipped with and be the screw-shaped sleeve pipe in several, be convenient to screw and screw in the sleeve pipe, plasterboard or cement plate and wheat straw board are fixed together.Other has application for a patent for invention CN1556290 " multi-functional composite thermal-insulating sound-proof material and manufacture method thereof " to introduce, with agricultural crop straws such as straw or straws as the heat insulating pugging, wherein a kind of method is directly to be laid in stalk on the cement sand bed, not having bonding between the stalk, be loose condition (of surface), is a kind of roof cladding; Another kind method is with organic adhesive stalk to be bonded together, with the compound laminated composite plate material that is prefabricated into of cement sand bed, can a compound again layer sizing in the sheet material bottom surface as the stalk protective layer; The cement sand bed outside surface can compound again one deck waterproof layer or ornament layer or its two combination.
Panel adopts plasterboard or cement plate as protective layer in the above-mentioned utility model patent, needs to adopt mechanical system that central layer and panel are fixed together, the recombination process relative complex of panel, and material cost improves.Composition board when not having bonding between the stalk in the foregoing invention patent can only horizontal positioned be used (as roof cladding), otherwise easily causes the stalk displacement; The precoated plate made from stalk and organic binder bond can't directly be used as materials for wall.
Summary of the invention
The purpose of this invention is to provide the sandwich wall board made by straw cement composite material that a kind of overall performance is good, the moulding process science is easy.
For achieving the above object, the invention provides a kind of sandwich wall board made by straw cement composite material, form by the core plate of internal layer and the surface layer on both sides, wherein: described internal layer core plate is by the cement of 70%～85wt%, the flyash of 0～10wt%, the weak point of 15%～22wt% cuts wheat straw and water mixing back compacting forms, and the solid weight ratio of water is 0.70～0.80;
Described surface material is to pour into a mould after being mixed by following three class raw materials to form in formwork erection, wherein: the solid material, wherein cement accounts for 50%～62wt%, and sand accounts for 10%～20wt%, and flyash accounts for 20%～30wt%, and broken wheat straw accounts for 2%～4wt%; Polymkeric substance, acrylic resin, polyvinyl alcohol resin or ethane-acetic acid ethyenyl ester copolymer resins polymkeric substance, poly-solid than being 0.20%～0.60wt%; Water, the solid weight ratio 0.45～0.70: 1 of water.
Above-mentioned sandwich wall board made by straw cement composite material, described broken wheat straw maximum length 12mm, it is 20mm～40mm that weak point is cut wheat straw length.
The specification of above-mentioned sandwich wall board made by straw cement composite material is 2500mm～3000mm * 600mm * 90mm, core board size 2500 or 2460mm～3000 or 2960mm * 560mm * 60mm, the sandwich wall board oise insulation factor is 41.5dB, counter-bending load 115kg/m
2
In the above-mentioned sandwich wall board made by straw cement composite material, described polymkeric substance is one or more compound that is selected from acrylic resin, polyvinyl alcohol resin or the ethane-acetic acid ethyenyl ester copolymer resins.
Another object of the present invention is to provide the manufacture method of above-mentioned sandwich wall board.
This method may further comprise the steps:
Step 1: the core board raw material is mixed compression moulding separately;
Step 2: formwork erection is in place, the central layer that obtains is put among the formwork erection die cavity, and positioned;
Step 3:, stir with the water of cement described in the surface material, sand, flyash, 80% dosage and the mixed with polymers of 50% dosage;
Step 4: add broken wheat straw gradually, continuously stirring;
Step 5: secondary adds remainder water and polymkeric substance, stirs, and forms compound;
Step 6: compound is injected formwork erection, the cast surface layer;
Step 7: maintenance 6～8h in the mould, the demoulding, later stage natural curing obtains the finished product sandwich wall board.
In the manufacture method of the above sandwich wall board made by straw cement composite material, the formwork erection of described step 6 is a battery mould; The formwork erection cavity dimension is 2500～3000mm * 600mm * 90mm.
According to technique scheme, the present invention wherein central layer is with cement matrix the wheat straw stalk to be bonded together, and possesses certain intensity, can guarantee the technological operation requirement; Adopt the formwork erection technology to pour into a mould broken wheat straw cement surface material, capstock combines by physical action and chemical action with central layer, helps the raising of wallboard overall performance.Still mix the wheat straw bar in the surface layer compound, can make full use of waste resource, and surface layer adding polymkeric substance, material flowability is good, can be by the mode moulding of cast; The sandwich wall board any surface finish of formwork erection technology manufacturing is smooth, nothing exposes broken wheat straw, and oise insulation factor reaches 41.5dB, and counter-bending load reaches 115kg/m
2, radionuclide specific activity internal radiation index I
RaBe 0.23, external radiation exposure index I
rBe 0.53, for high quality does not fire A level finishing plate face.
Description of drawings
Fig. 1 is a sandwich wall board cross-sectional structure synoptic diagram of the present invention of the present invention.
Embodiment
Sandwich wall board made by straw cement composite material provided by the invention comprises three layers from structure, i.e. the core plate of internal layer and the surface layer that is clipped in the internal layer two sides.
Internal layer core plate mainly cuts wheat straw by cement, flyash, weak point and water mixing back compacting forms, and wherein cement accounts for 70%～85wt% of solid material total amount, and flyash accounts for 0～10wt% of solid material total amount, and weak point is cut 15%～22wt% that wheat straw accounts for solid material total amount; Water-solid ratio 0.70～0.85: 1 (ratio of weight and number).
Surface material is to pour into a mould after being mixed by three class raw materials to form in formwork erection, wherein:
The solid material, wherein cement accounts for 50%～62wt%, and sand accounts for 10%～20wt%, and flyash accounts for 20%～30wt%, and broken wheat straw accounts for 2%～4wt%;
Polymkeric substance, acrylic resin, polyvinyl alcohol resin or ethane-acetic acid ethyenyl ester copolymer resins polymkeric substance, poly-admittedly than 0.20%～0.60wt% (polymkeric substance accounts for the weight percentage of solid material);
Water, water-solid ratio 0.45～0.70: 1 weight part.
What these raw materials were brought into play in the present invention act as:
Cement: the main ingredient that gelling property and intensity are provided.Can select the cement of the silicate cement of the aluminosulfate cement of strength grade 42.5 or strength grade 42.5R for use.
Sand, flyash: adjust the mixture process performance.The maximum particle diameter of sand is no more than 3mm, natural grading; Flyash is the II level.
Broken wheat straw: maximum length 12mm, natural grading.Mainly play filling effect, also can improve the shock resistance of hardened material.
Short wheat straw: the 20mm～40mm that cuts through anticipating, mainly plays the skeleton filling effect, is used for the wallboard inner core and can improves its sound insulation property and heat-proof quality.
Polymkeric substance: improve the compound workability with mobile, improve the adhesive property of broken wheat straw and cement matrix material.Available polymkeric substance has acrylic resin, polyvinyl alcohol resin or ethane-acetic acid ethyenyl ester copolymer resins.
Among the present invention, the moulding at first separately of core plate, and then put into formwork erection neutral plane layer material and together be shaped to sandwich board.
Core sheet metal forming process: the weak point that (1) will handle is cut wheat straw, cement, flyash and water and is mixed in proportion, and stacks standby; (2) with mixture laying to around have in the model of frame (flat-die); (3) the compound pressurization to paving smooth according to compression ratio of setting and dead load keeps pressurization 2～3 hours; (4) demoulding obtains the core plate and then after placing 2h.
The sandwich board moulding process:
Step 1: formwork erection is in place, the central layer that obtains is put among the formwork erection die cavity, and positioned;
Step 2:, stir with the water of cement described in the surface material, sand, flyash, 80% dosage and the mixed with polymers of 50% dosage;
Step 3: add broken wheat straw gradually, continuously stirring;
Step 4: secondary adds surplus water and polymkeric substance, stirs, and forms compound;
Step 5: the compound that step 4 is obtained injects formwork erection, the cast surface layer;
Step 6: maintenance 6～8h in the mould, the demoulding, later stage natural curing obtains the finished product sandwich wall board.
Below with specific embodiment the present invention is described.
Embodiment one:
The central layer batching: cement 77%, flyash 6%, weak point is cut wheat straw 30mm and is accounted for 17%; Water-solid ratio 0.78.
Surface layer batching: cement 58%, sand 18%, flyash 20%, broken wheat straw 4%; Poly-admittedly than 0.35%; Water-solid ratio 0.65.
Manufacturing processed:
1, central layer moulding: the weak point that the central layer batching was anticipated is cut 17 kilograms of wheat straws, 77 kilograms of cement, 6 kilograms in flyash and 78 kilograms of mixing of water, stir, paving has in the flat-die of the 2880mm * 560mm * 60mm of frame all around, to compound pressurization 0.2MPa, keep pressurization 2～3 hours, and then place that the demoulding obtains the core plate after 2 hours.
2, sandwich board moulding: with surface layer prepare burden 58 kilograms of cement, 18 kilograms of sands, 20 kilograms in flyash, 52 kilograms in water, 0.18 kilogram in polymkeric substance one (polyvinyl alcohol resin), stir, add 4 kilograms of broken wheat straws then gradually, continuously stirring again, and then adding one 0.17 kilograms in 13 kilograms in water and polymkeric substance, the formation compound stirs; Get the formwork erection that is of a size of 2920mm * 600mm * 90mm, place the formwork erection central position to fix the core plate, the surface layer compound is poured into core plate both sides, leave standstill moulding, the demoulding behind maintenance 6～8h in mould, later stage natural curing obtained sandwich board in 14 days.
The sandwich board cross section that obtains is referring to Fig. 1, and visible middle one deck is a central layer, and wherein visible weak point is cut wheat straw, and periphery is a surface layer, and wheat straw is more broken.And the sandwich board surface layer that obtains is smooth bright and clean, does not expose wheat straw, can be directly as indoor partition panel.
Embodiment two:
Central layer batching: cement 85%, the short wheat straw 40mm 15% that cuts; Water-solid ratio 0.70.
Panel batching: cement 60%, sand 15%, flyash 22%, broken wheat straw 3%; Poly-admittedly than 0.40%; Water-solid ratio 0.60.
Manufacturing processed:
1, central layer moulding: central layer batching weak point is cut 15 kilograms of wheat straws, 85 kilograms of cement and 70 kilograms of mixing of water, stir, paving has in the flat-die of the 2920mm * 560mm * 60mm of frame all around, to compound pressurization 0.2MPa, keep pressurization 2～3 hours, and then place that the demoulding obtains the core plate after 2 hours.
2, sandwich board moulding: with 60 kilograms of cement, 15 kilograms of sands, 22 kilograms in flyash, 48 kilograms in water, 0.20 kilogram in polymkeric substance two (acrylic resin), stir, add 3 kilograms of broken wheat straws then gradually, continuously stirring again, and then adding 2 0.20 kilograms in 12 kilograms in water and polymkeric substance, the formation compound stirs; Get the formwork erection that is of a size of 2920 * 600mm * 90mm, place the formwork erection central position to fix the core plate, the surface layer compound is poured into core plate both sides, both ends of the surface do not coat, leave standstill moulding, the demoulding behind natural curing 6～8h in mould, later stage natural curing obtained sandwich board in 14 days.
Embodiment three:
The central layer batching: cement 72%, flyash 8%, weak point is cut wheat straw 40mm and is accounted for 20%; Water-solid ratio 0.80.
Surface layer batching: cement 57%, sand 15%, flyash 25%, broken wheat straw 3%; Poly-admittedly than 0.50%; Water-solid ratio 0.55.
Manufacturing processed:
1, central layer moulding: central layer batching weak point is cut 20 kilograms of wheat straws, 72 kilograms of cement, 8 kilograms in flyash and 80 kilograms of mixing of water, stir, paving has in the flat-die of the 2880mm * 560mm * 60mm of frame all around, to compound pressurization 0.2MPa, keep pressurization 2～3 hours, and then the demoulding obtains the core plate after placing 2h.
2, sandwich board moulding: with surface layer prepare burden 57 kilograms of cement, 15 kilograms of sands, 25 kilograms in flyash, 44 kilograms in water, 0.25 kilogram in polymkeric substance three (ethane-acetic acid ethyenyl ester copolymer resins), stir, add 3 kilograms of broken wheat straws then gradually, continuously stirring again, and then adding 3 0.25 kilograms in 11 kilograms in water and polymkeric substance, the formation compound stirs; Get the battery mould that is of a size of 2920 * 600mm * 90mm, place each formwork erection central position to fix respectively the core plate, the surface layer compound is poured into core plate both sides, six full coatings, vibration makes it closely knit a little, the demoulding behind natural curing 6～8h in mould, later stage natural curing obtained the polylith sandwich board in 14 days.
The wallboard performance test
Oise insulation factor: adopt GBJ75 " Code for measurement of building sound insulation " standard test
Counter-bending load: adopt JG/T169-2005 " light lath for building partition wall " standard test
Uninflammability: adopt GB8624-1997 " Classification on burning behaviour for building materials " standard test
Radioactivity: adopt GB6566-2001 " the radioactive material nucleic is limited the quantity of " standard test
Test result:
Sandwich wall board specification: 2920mm * 600mm * 90mm, central layer thickness 60mm wherein, each 15mm of two surface thicknesses, oise insulation factor is 41.5dB, counter-bending load 115kg/m
2Surface layer is not for firing A level material.
Radionuclide specific activity internal radiation index I
RaBe 0.23, external radiation exposure index I
rBe 0.53, synthetic determination is the category-A material of construction.
Adopt method of the present invention to have following characteristics: stalk large usage quantity in (1) central layer of the present invention, can improve wallboard Sound insulation property and heat-proof quality; The stalk consumption is relatively less in the capstock, can guarantee narrow dark slit (600mm on the one hand Deeply, 15mm is wide) smooth cast, can guarantee on the other hand presentation quality and the mechanical property of wallboard. (2) surface layer is mixed Close the material good fluidity, can by the mode moulding (cast degree of depth 600mm, width 15mm) of cast, can obtain bright and clean Smooth, nothing exposes the high-quality template face of broken wheat straw.
Claims (6)
1, a kind of sandwich wall board made by straw cement composite material is characterized in that: forms by the core plate of internal layer and the surface layer on both sides, wherein:
Described internal layer core plate is by the cement of 70%～85wt%, and the flyash of 0～10wt%, the weak point of 15%～22wt% cut wheat straw and water mixing back compacting forms, and the solid weight ratio of water is 0.70～0.80;
Described surface material is to pour into a mould after being mixed by following three class raw materials to form in formwork erection, wherein:
The solid material, wherein cement accounts for 50%～62wt%, and sand accounts for 10%～20wt%, and flyash accounts for 20%～30wt%, and broken wheat straw accounts for 2%～4wt%;
Polymkeric substance, acrylic resin, polyvinyl alcohol resin or ethane-acetic acid ethyenyl ester copolymer resins polymkeric substance, poly-solid than being 0.20%～0.60wt%;
Water, the solid weight ratio 0.45～0.70: 1 of water.
2, sandwich wall board made by straw cement composite material according to claim 1 is characterized in that: described broken wheat straw maximum length 12mm, it is 20mm～40mm that weak point is cut wheat straw length.
3, require 1 or 2 described sandwich wall board made by straw cement composite material according to profit, it is characterized in that: described sandwich wall board specification: 2500mm～3000mm * 600mm * 90mm, core board size 2460mm～2960mm * 560mm * 60mm, the sandwich wall board oise insulation factor is 41.5dB, counter-bending load 115kg/m
2
4, the manufacture method of the arbitrary described sandwich wall board made by straw cement composite material of claim 1 to 3 may further comprise the steps:
Step 1: the core board raw material is mixed compression moulding separately;
Step 2: formwork erection is in place, the central layer that obtains is put among the formwork erection die cavity, and positioned;
Step 3:, stir with the water of cement described in the surface material, sand, flyash, 80% dosage and the mixed with polymers of 50% dosage;
Step 4: add broken wheat straw gradually, continuously stirring;
Step 5: secondary adds remainder water and polymkeric substance, stirs, and forms compound;
Step 6: compound is injected formwork erection, the cast surface layer;
Step 7: maintenance 6～8h in the mould, the demoulding, later stage natural curing obtains the finished product sandwich wall board.
5, according to the manufacture method of the described sandwich wall board made by straw cement composite material of claim 4, it is characterized in that: the formwork erection of described step 6 is a battery mould.
6, according to the manufacture method of the described sandwich wall board made by straw cement composite material of claim 4, it is characterized in that: the formwork erection cavity dimension of described step 6 is 2500～3000mm * 600mm * 90mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101148948A CN100340519C (en) | 2005-11-17 | 2005-11-17 | Sandwich wall board made by straw cement composite material and mfg. process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101148948A CN100340519C (en) | 2005-11-17 | 2005-11-17 | Sandwich wall board made by straw cement composite material and mfg. process thereof |
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| CN1792969A CN1792969A (en) | 2006-06-28 |
| CN100340519C true CN100340519C (en) | 2007-10-03 |
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| CN100393490C (en) * | 2006-11-10 | 2008-06-11 | 沈阳建筑大学 | Method for producing artificial concrete-based woodboards |
| CN101830672B (en) * | 2010-03-31 | 2012-08-22 | 孙平 | Building material |
| CN102452832B (en) * | 2010-10-28 | 2013-07-24 | 中国建筑材料科学研究总院 | Straw cement-based microporous building material and preparation method thereof |
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| CN106401055A (en) * | 2016-09-13 | 2017-02-15 | 西南科技大学 | Prefabricated light partition board |
| CN106946535A (en) * | 2017-03-18 | 2017-07-14 | 黄河科技学院 | A kind of vacuum heat-insulating plate core material for building |
| CN107473645B (en) * | 2017-09-15 | 2020-07-07 | 长安大学 | High-damping concrete based on internal structure design and preparation method thereof |
| CN107520946A (en) * | 2017-10-19 | 2017-12-29 | 洛阳市易安环保科技有限公司 | A kind of composite partition plate forming device and forming method |
| CN108546047A (en) * | 2018-05-30 | 2018-09-18 | 广西亿赛建设工程有限公司 | A kind of cement plant fiber acoustic board of solid waste regeneration and preparation method thereof |
| CN112266214B (en) * | 2020-10-31 | 2022-06-21 | 娄底市新越鼎建材科技有限公司 | Sandwich integrated external wall insulation board and preparation method thereof |
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