CN1142472A - Rice-hull cement concrete - Google Patents
Rice-hull cement concrete Download PDFInfo
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- CN1142472A CN1142472A CN96104816A CN96104816A CN1142472A CN 1142472 A CN1142472 A CN 1142472A CN 96104816 A CN96104816 A CN 96104816A CN 96104816 A CN96104816 A CN 96104816A CN 1142472 A CN1142472 A CN 1142472A
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- cement
- rice husk
- concrete
- glue
- rice
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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
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Abstract
A rice husk cement concrete as insulation material uses rice husk as aggregate and architectural adhesive 107 as reinforcing agent. It features high insulation and anticorrosion performance, low cost, no need of pretreatment to aggregate, and easy construction.
Description
The present invention relates to a kind of light concrete and preparation method thereof.
The advantage of cement concrete mainly is abundant, the low price of raw material sources, and easy construction, corrosion resistance is strong, intensity is high, all is the main material of construction of irreplaceable indoor and outdoor in many aspects therefore.
Along with the development of all our undertakings, the consumption of cement concrete also rapidly increases, for adopting sandstone to do the concrete of aggregate, because it is from great, so the load of whole building is also big, so many people are being devoted to light concrete research always.
Though light concrete intensity is lower, its deadweight is little, therefore, the non-bearing member not high to requirement of strength, if can adopt light concrete, the deadweight of whole building is greatly reduced, can not only make bearing carrier can adopt less cross section, and key dimension also can correspondingly reduce, thereby the reduction construction cost, but because existing light concrete price height, aggregate all need carry out pre-treatment generally speaking, up to the present therefore the also corresponding raising of its difficulty of construction also fail to be used widely.
Use vegetable fibre and particle thereof and cement mixing extrusion forming to make sheet material, had history decades at home and abroad, but up to now, that realizes suitability for industrialized production all is to use wood fibre, as cement-bonded wood chipboard,, more and more be tending towards stagnating though it has come out more than 60 year, major cause is that timber is more and more in short supply, and the cost of its product also is to be difficult to accept.And the precipitate of common vegetable fibre cement is produced anticoagulation also is one of reason that they can not promotion and implementation.
Rice husk is the shell of paddy rice fruit, and paddy rice is one of human main foods, has 1/3rd go into based on food rice at present in the world at least.The main place of production of paddy rice concentrates on the Asia, and wherein China produces about 200,000,000 tons of paddy per year, is converted to about 40,000,000 tons of rice husk annual production, accounts for more than 30% of Gross World Product, ranks first in the world.Except that making fuel, almost become refuse has entirely wasted the past rice husk in China rural area.Along with progress of science and technology, the development and use of rice husk have also obtained development rapidly at home and abroad, but compare with its annual production, and its utilization ratio is still very low.
Prior art, all belong to composite plant fiber-cement board and preparation method thereof as ZL92104363.5, ZL88105291.4, though wherein also mention with rice husk as raw material and cement mixing, but just at the subsidiary rice husk of mentioning aspect the vegetable fibre from its content, characteristics, performance, the one-tenth of the rice husk aspect that grades itself is lacked deep analysis and research, thereby can not grasp its characteristic aspect the batching operating procedure, the result, in the end the intensity aspect of finished product can not reach the ideal level, and does not propose the intensity index that concrete enforcement parameter and member reach.
The inventor has experienced test for many years, analysis, has carried out continuous research, practice and improvement, has proposed sophisticated embodiment.
Purpose of the present invention promptly is at above-mentioned the deficiencies in the prior art, the precipitate that comprises common vegetable fibre produces anticoagulation to cement, when influence applies and adopts rice husk to be raw material, because materials proportioning and operating procedure aspect existing problems make product can not reach the ideal strength level, and, provide a kind of rice-hull cement concrete of practicable, excellent property according to the experience that the inventor puts into practice for many years.
The objective of the invention is to be achieved through the following technical solutions:
A kind of is the rice-hull cement concrete of aggregate with the rice husk, and materials are by weight ratio:
Rice husk: cement=(18～27): 100
Water: cement=(40～50): 100
107 glue: rice husk=(28～33): 100
The preparation method who with the rice husk is the rice-hull cement concrete of aggregate comprises following program:
(1) takes by weighing in a certain amount of air-dry rice husk ground agitator.
(2), take by weighing 107 required glue, and be diluted with water to 1: 1 and pour in the agitator stirring 10 minutes by 107 glue and rice husk amount ratio.(3) take by weighing a certain amount of cement by rice husk/cement ratio, pour in the agitator, stirred 10 minutes.
(4) take by weighing a certain amount of water and deduction dilution 107 glue institute water consumption by water and cement consumption ratio, pour in the agitator, stirred 8～10 minutes.
(5) go into mould, vibrate and hit reality.
The present invention has the following advantages and effect:
The ㈠ salient features
1. in light weight
This concrete can be at 0.8kg/m according to its unit weight of requirement of strength
3～1.3kg/m
3Between the change.
2. good heat insulating
Because it is aggregate that this concrete adopts the very high rice husk of porosity, so its good heat insulating, thermal conductivity only are about 0.23w/mk.
3. intensity is higher
This concrete is higher as its intensity of lagging material, and can select different cement and rice husk consumption as required for use, and the methods such as degree of compactness that improve compound, reaches the purpose of further its intensity of raising.This concrete common intensity is:
Ultimate compression strength 8MPa～15MPa
Folding strength 2MPa～6MPa
Especially its folding strength is higher relatively, and general ultimate compression strength is 2～3 with the ratio of folding strength, is higher than the concrete that sandstone is done aggregate.
4. good frost resistance
This concrete antifreezing performance is good, at-25 ℃ of equal no changes of its test specimen after 25 freeze thawing, and selects three groups of test specimens to measure the intensity level such as the table 2 of its freeze thawing front and back.
Table 2
| Test piece number | -25 ℃ of 25 intensity of freeze thawing (PMa) | To specific tenacity (MPa) | ||
| Anti-folding | Resistance to compression | Anti-folding | Resistance to compression | |
| ????1 | ????3.9 | ????11.6 | ????6.1 | ????11.6 |
| ????2 | ????3.5 | ????12.1 | ????4.6 | ????11.7 |
| ????3 | ????3.0 | ????11.5 | ????4.5 | ????14.0 |
(2) abundant, the low price of raw material sources
Cement and 107 glue all are that material of construction, the especially rice husk used always almost spread all over the country, and price is about 0.1 yuan/kilogram at present.
(3) easy construction, purposes are wide
This concrete aggregate does not need to carry out any pre-treatment, and it has identical construction technology with the concrete of making aggregate of sandstone, and therefore being convenient to the scene mixes and stirs construction.This concrete has stronger bonding force with metal, therefore can add wire netting or reinforcing bar, thereby improve its bulk strength greatly.Again owing to be to be aggregate with a large amount of rice husks, and in the rice husk except netted SiO
2Outward, mainly be xylogen and Mierocrystalline cellulose, so this concrete is similar to timber, nailability is fine, can be directly with iron nail or screw ailing, ailing place flawless.Also available handsaw saw and saw face are very level and smooth.
Owing to be cement concrete, so its surface can select multiple material coating for use, thereby can improve its resistance to corrosion and attractive in appearance, and can carry out bonding and joint filling with the very cheap sand-cement slurry of price.
This concrete purposes is wide, is a kind of more cheap indoor and outdoor light concrete lagging material.
Be described in further detail below in conjunction with embodiment:
One, raw material selects for use and performance characteristics
The ㈠ rice husk accounts for 20% of paddy weight, and paddy includes decomposable nutrient seldom, and its main component is SiO
2, xylogen, Mierocrystalline cellulose etc., from microtexture, rice husk is with netted high purity SiO
2Be skeleton, wrap up the Mierocrystalline cellulose of one deck densification again.Therefore big, in light weight, the good heat insulating of rice husk porosity, corrosion resistance are strong.It not only has extraordinary toughness, but also has certain intensity.The rice husk uniform particles, granularity is moderate, and the moistening back of rice husk volume does not expand, and is easy to compacting, the degree of compactness that this helps uniform mixing and improves compound.Rice husk contains small amount of potassium in addition, so the aqueous solution of rice hull ash is weakly alkaline, and cement and 107 glue are the weakly alkaline material, therefore selects for use rice husk and cement and 107 glue to mix and stir, and the chemical property of its compound is more stable.
(2) 107 glue
107 glue are the colourless aqueous solution, solid content is 12～10%, proportion is 1.05, it is to carry out part by polyvinyl alcohol and formaldehyde to contract and react, and the water-soluble poval formal glue stick that makes, this product is a weakly alkaline, its pH value 7～8, it adds and can improve intensity, toughness, the adhesivity of cementitious coating behind the cement and prevent cracking and come off etc. except that having stronger tackiness.Because therefore easy to use, the low price of 107 glue has now become the main caking agent in wood fibre and the construction industry.It contains the material of a large amount of wood fibres to this class of rice husk, has good bonding force, and cement is had enhancement, adds cementability, toughness and the intensity thereof that can improve behind 107 glue between cement and rice husk.Main is because 107 glue solubleness in water is very high, adds the workability that can improve compound in the cement greatly, helps the scene to mix and stir construction.
107 glue have played the effect of bonding rice husk and cement
Two, principle
Rice-hull cement concrete is to be aggregate with the rice husk, and 107 building glue are the dose of wrapping up in abdomen agent and cement of rice husk.Cement has adhesion and cohesion matter, can make rice husk be bonded to closely knit integral body.
Because the voidage of rice husk is big, and its surface has the Mierocrystalline cellulose of one deck densification can adsorb 107 glue fully, thereby improve the workability of compound greatly, rice husk is easy to compacting after moistening in addition, and dry back volume does not expand, thus this concrete with have the composite soil of doing aggregate with sandstone now and have identical construction technology, again because this concrete has cementability preferably with metal, thereby can add wire netting or reinforcing bar, make prefabricated section, thereby improved its bulk strength greatly.
The selected material of this compound all is weakly alkaline, so its chemical property is more stable, and resistance to corrosion is strong.Rice husk does not all have anything to pollute from process for processing to the whole process of transportation, and its epigranular, is of moderate size, and therefore doing aggregate with it does not need to carry out any pre-treatment, can mix and stir construction in the scene.
Three, materials proportioning
This concrete is under the situation of given volume, and its weight and intensity depend primarily on the ratio of cement and rice husk consumption, and the degree of compactness of compound is a key factor of intensity height certainly.The consumption of this concrete rice husk and cement can be generally by weight according to the requirement of intensity and weight is selected:
Rice husk: cement=(18～27): 100
Water: cement=(40～50): 100
107 glue: rice husk=(28～33): 100
Four, operation
Take by weighing a certain amount of air-dry rice husk in agitator, by 107 glue and rice husk amount ratio, take by weighing 107 required glue, and be diluted with water to 1: 1 and pour in the agitator and stirred 10 minutes, taking by weighing a certain amount of cement again pours in the agitator, restir 10 minutes, again by water and cement consumption than taking by weighing certain water yield, and the used water yield of deduction dilution 107 glue, remainder water is all poured in the agitator, and restir 8～10 minutes can be gone into mould, going into should vibrate behind the mould as much as possible hits reality, to improve its degree of compactness.
Because the rice husk porosity is big, water retention property is good, so generally during health only need add a cover plastic cloth, test specimen need not be immersed in the water, if test specimen is difficult for being covered completely by plastic cloth, can suitably spill some water after a couple of days, makes it to keep certain humidity to get final product.
Embodiment one:
(1) takes by weighing air-dry rice husk 140g
(2) take by weighing 1 07 glue 44ml
(3) measure tap water 325ml (supposing water proportion 1)
(4) take by weighing 425 silicate cement 760g
(5) three cement mortar tryouts
Rice husk is poured in the agitator, pour 107 glue into, and from the 325ml water of having measured, get 44ml and pour in the agitator, fully stirred 10 minutes, remainder water was poured into restir 8～10 minutes again, the compound that mixes and stirs is divided pour die trial for three times into and vibrate and hit reality, and the demoulding in 24 hours, test specimen after the demoulding carefully covers completely with plastic cloth, and notes keeping humidity, and its intensity such as table 1 are measured in health after 28 days.
Table 1
| Intensity (MPa) | ||||
| Anti-folding | Resistance to compression | |||
| Folding strength | Intensity is average | Resistance to compression load (KN) | Intensity is average | |
| ????6.00 | ????4.90 | ????31.75 | ????31.75 | ????12.60 |
| ????4.70 | ????30.00 | ????32.00 | ||
| ????5.12??? | ????29.75 | ????33.50 | ||
Claims (2)
1, a kind of is the rice-hull cement concrete of aggregate with the rice husk, it is characterized in that: said concrete materials are by weight ratio:
Rice husk: cement=(18～27): 100
Water: cement=(40～50): 100
107 glue: rice husk=(28～33): 100
Said concrete preparation manipulation process is:
(1) taking by weighing a certain amount of air-dry rice husk places in the agitator.
(2), take by weighing 107 required glue, and be diluted with water to 1: 1 and pour in the agitator stirring 10 minutes by 107 glue and rice husk amount ratio.
(3) take by weighing a certain amount of cement by rice husk and cement consumption ratio, pour in the agitator, stirred 10 minutes.
(4) take by weighing a certain amount of water and deduction dilution 107 glue institute water consumption by water and cement consumption ratio, pour in the agitator, stirred 8～10 minutes.
(5) go into mould, vibrate and hit reality.
2, rice-hull cement concrete according to claim 1 is characterized in that: said concrete materials optimum value by weight ratio is: rice husk: cement=18.5: 100; Water: cement=43: 100; 107 glue: rice husk=31: 100
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96104816A CN1142472A (en) | 1996-04-30 | 1996-04-30 | Rice-hull cement concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN96104816A CN1142472A (en) | 1996-04-30 | 1996-04-30 | Rice-hull cement concrete |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1142472A true CN1142472A (en) | 1997-02-12 |
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ID=5118557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96104816A Pending CN1142472A (en) | 1996-04-30 | 1996-04-30 | Rice-hull cement concrete |
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| Country | Link |
|---|---|
| CN (1) | CN1142472A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002006182A1 (en) * | 2000-07-14 | 2002-01-24 | Davco Construction Materials Pty Limited | Mortar composition and method |
| CN102503265A (en) * | 2011-10-24 | 2012-06-20 | 珠海保税区台商科技开发区有限公司 | Environmentally-friendly cement mortar containing rice husk |
| CN107858888A (en) * | 2017-10-20 | 2018-03-30 | 四川大学 | A kind of hollow layer-stepping lightweight shell concrete plants raw component and its construction method |
| CN115557761A (en) * | 2022-10-11 | 2023-01-03 | 浙江帝耐美环保科技有限公司 | Anti-crack ground structure and preparation method thereof |
-
1996
- 1996-04-30 CN CN96104816A patent/CN1142472A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002006182A1 (en) * | 2000-07-14 | 2002-01-24 | Davco Construction Materials Pty Limited | Mortar composition and method |
| CN102503265A (en) * | 2011-10-24 | 2012-06-20 | 珠海保税区台商科技开发区有限公司 | Environmentally-friendly cement mortar containing rice husk |
| CN107858888A (en) * | 2017-10-20 | 2018-03-30 | 四川大学 | A kind of hollow layer-stepping lightweight shell concrete plants raw component and its construction method |
| CN115557761A (en) * | 2022-10-11 | 2023-01-03 | 浙江帝耐美环保科技有限公司 | Anti-crack ground structure and preparation method thereof |
| CN115557761B (en) * | 2022-10-11 | 2023-11-21 | 浙江帝耐美环保科技有限公司 | Crack-resistant ground structure and preparation method thereof |
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