CN104058661B - A kind of concrete hollow block adding waste tire rubber granule and preparation method thereof - Google Patents
A kind of concrete hollow block adding waste tire rubber granule and preparation method thereof Download PDFInfo
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- CN104058661B CN104058661B CN201410245282.1A CN201410245282A CN104058661B CN 104058661 B CN104058661 B CN 104058661B CN 201410245282 A CN201410245282 A CN 201410245282A CN 104058661 B CN104058661 B CN 104058661B
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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
The invention discloses a kind of concrete hollow block adding waste tire rubber granule and preparation method thereof, raw materials parts by weight be cement 302-375 part, in thick river sand 565.7-607.2 part, rubble and/or cobble 1180-1300 part, rubber grain 21.8-59.3 part, water reducer 2.385 parts, water 106-134 part; Preparation method is as follows: first by rubber grain immersion treatment 20min in 20%KOH solution, and rear clear water is cleaned, then through airing to saturated dry surface; By in thick river sand, cement, water reducer and rubber grain add in stirrer and mix and stir; Add rubble and/or cobble again, add water to stir and obtained mix and stir concrete grout and enter in forming machine shaping, after successively through maintenance, the demoulding, then carry out natural curing; The particle diameter of above-mentioned rubber grain is 0.1-5mm, and grating is reasonable.The holllow building block adopting method of the present invention to prepare, has the over-all propertieies such as good insulation, heat insulation, sound insulation, light weight concurrently, is suitable for use as the buildings bearing building block of different load bearing stength demand.
Description
Technical field
The present invention relates to a kind of concrete hollow block and preparation method thereof, particularly relate to a kind of concrete hollow block adding waste tire rubber granule and preparation method thereof.
Background technology
Along with the fast development of automotive industry, the recycling of increasing junked tire has become the international key subjects extremely paid close attention to.China is rubber country of consumption maximum in the world, is also tire supply country maximum in the world.2002-2012 China rubber consumption ranks first in the world for continuous 11 years, and annual discarded rubber tyre quantity is hundreds of millions of, due to cannot natural degradation, and the recycling of junked tire, and recycling becomes very urgent environmental issue already.
In recent years, China develops the utilisation technology of rubber powder/particle in other sides such as highway, railway, material of construction in succession, and achieves certain positively effect.As:
Chinese patent application CN102976686B discloses a kind of non-burning brick method being main raw material with waste old and flyash.This its fabrication cycle of non-burning brick preparation method is long, and its density non-burning brick prepared is also comparatively large, and thermal and insulating performance neither be desirable especially.
Chinese patent application CN101857399A discloses a kind of rubber reinforced cement functional composite material and preparation method thereof, its with waste old and cement or sand-cement slurry for starting material, coupling agent is adopted coupling tackiness agent to be put on waste and old rubber particle and/or powder surface, again by waste and old rubber particle and/or powder and cement or sand-cement slurry blended, then added in rubber-cement additive by water and stir, through mating formation, suppressing, the demoulding, maintenance obtain functional composite material product.It is said, this mechanics of composites intensity is high, good endurance, there is noise reduction, sound insulation, high impact properties, damping vibration attenuation, wear-resisting, the feature such as anti-electrostatic, waterproof, also there is the advantage such as heat-insulation and heat-preservation, environmental protection.
In the preparation process of this matrix material, on the one hand, carry out rubber surface modification because it needs to introduce a large amount of coupling agents (for 20 ~ 40% of rubber weight), its rubber grain pretreatment technology is complicated, cost of manufacture is also relatively high; On the other hand, this junked tire reclaims the manufacture being used for sheet material, and be directly used in compared with building structural materials with being reclaimed by junked tire, its junked tire recycles total amount comparatively speaking, room for promotion larger in addition.
At present, the 390mm × 190mm × 190mm single row of holes concrete hollow block of building by laying bricks or stones for bearing wall that China produces, its aerated density 1400kg/m
3, building block weight 17.0kg, hole ratio is 49.7%, thermal conductivity 1.0-1.04W/mK.The main not enough main manifestations that this concrete hollow block exists is: density is large, quality weight, and porosity is low, and heat insulating, soundproof effect are not desirable especially.
And if the waste tire rubber granule that density is low, porous, thermal and insulating performance are good can be introduced in concrete hollow block, on the one hand, significantly can improve the porosity of concrete hollow block inside, effectively alleviate the weight of building block; On the other hand, the thermal conductivity of concrete hollow block can be reduced, improve the over-all properties such as heat insulating, sound insulation of concrete hollow block.
But introducing rubber grain in concrete mortar will cause the significantly reduction of concrete hollow block ultimate compression strength.How in concrete mortar, to introduce rubber grain material composition, to obtain the good heat insulating of concrete hollow block, soundproof effect, enough porositys, and effectively reduce on the basis of the aerated density of concrete hollow block, building block weight (standard block monolithic weight), reduce as far as possible because rubber grain composition introduces the reduction amplitude of caused concrete segment ultimate compression strength, become a popular problem.
Summary of the invention
One of the object of the invention is, a kind of easy construction is provided to add the concrete hollow block of waste tire rubber granule efficiently, it has the over-all propertieies such as good insulation, heat insulation, sound insulation, light weight, environmental protection concurrently, and is suitable for use as the buildings bearing building block of different load bearing stength demand.
The technical scheme that the present invention is adopted for achieving the above object is, a kind of preparation method adding the concrete hollow block of waste tire rubber granule, it is characterized in that, raw materials parts by weight be cement 302-375 part, in thick river sand 565.7-607.2 part, rubble and/or cobble 1180-1300 part, rubber grain 21.8-59.3 part, water reducer 2.385 parts, water 106-134 part;
Main performance index is as follows: hole ratio is 50-60.2%, and thermal conductivity is 0.68-0.93W/mK, and aerated density is 1173-1380kg/m
3, mean compressive strength value is 7.5-13.0MPa.
The technique effect that technique scheme is directly brought is, the concrete hollow block prepared, and it has the over-all propertieies such as good insulation, heat insulation, sound insulation, light weight, environmental protection concurrently, is suitable for use as the bearing building block of the buildings of different load bearing stength demand.
Two of the object of the invention is, provides that a kind of technique is simple, the preparation method of the concrete hollow block of the interpolation waste tire rubber granule of low cost of manufacture, easy construction.
The technical scheme that the present invention is adopted for achieving the above object is, a kind of preparation method adding the concrete hollow block of waste tire rubber granule, it is characterized in that, described preparation method comprises the steps:
(1), first by rubber grain immersion treatment 20min in 20%KOH solution, clean with clear water, then through airing to saturated dry surface;
(2), by thick river sand, cement, water reducer and rubber grain add in stirrer, mix and stir;
(3), limit add waterside stir, wrap up rubber grain completely to sand-cement slurry;
(4), add rubble and/or cobble, be stirred to evenly while add waterside, obtain and mix and stir concrete grout;
(5), concrete grout is entered in forming machine shaping, after successively through maintenance, the demoulding, then maintenance and get final product under field conditions (factors);
Above-mentioned rubber grain is that raw material adopts normal temperature crushing up to obtain with junked tire, its particle diameter is 0.1-5mm, size grading is respectively by weight: particle diameter be 0.1-0.16mm account for 5%, particle diameter be 0.16-0.315mm account for 8%, particle diameter be 0.315-0.63mm account for 15%, particle diameter be 0.63-1.25mm account for 22%, particle diameter be 1.25-2.5mm account for 30%, particle diameter be 2.5-5mm account for 20%.
In technique scheme, rubber grain is that raw material adopts normal temperature crushing up to obtain with junked tire.Described normal temperature crushing up refers at normal temperature or a little more than in the environment of normal temperature, is prepared a kind of breaking method of rubber powder by mechanical effect; Its pulverization principle is applied to extrude by machinery to rubber, mill, shears, the multiple physical reactive force such as to tear, to be cut off by the rubber of junked tire and to crush.The rubber grain that normal temperature crushing up is produced has the features such as surface-area is comparatively large, surface relief is uneven, burr is more.
In technique scheme, rubber grain by laying the multilayer screen cloth that screen-aperture is of a size of 5mm, 2.5mm, 1.25mm, 0.63mm, 0.315mm, 0.160mm, 0.100mm respectively on Centrifugal vibration sifting bed, carry out Centrifugal vibration screening, to carry out rational grating proportioning.
Due in tire production process, all be added with in rubber and double as the Zinic stearas that matchmaker's activator is urged in lubricant, release agent and sulfuration, and Zinic stearas is powdery and have soapy feeling, if effectively do not removed rubber particle surface attachment or residual Zinic stearas composition, the cohesive force between rubber grain and sand-cement slurry directly will be affected.Therefore, the KOH solution of 20% is adopted to carry out immersion treatment to the rubber grain after normal temperature fragmentation in technique scheme.Concrete immersion process is as follows:
(1) configure the KOH solution of 20%, half is placed in bucket, and second half waits until follow-up interpolation;
(2) in KOH solution bucket, rubber grain is added, Keep agitation;
(3) constantly add the solution of waiting until interpolation in whipping process, and constantly vibrate;
(4) immersion treatment is after 20 minutes, leaches rubber grain, cleans airing again do to saturation plane with clear water.
Through the rubber grain of the KOH solution immersion treatment of 20%, on the one hand, its surface attachment or residual Zinic stearas can effectively be removed;
On the other hand, rubber grain soaks the physical and mechanical property that not only can not change rubber grain in 20%KOH solution, microcosmic and the macro property of modified concrete can also be improved: the rubber grain that the KOH solution immersion treatment through 20% is crossed, cohesive force between sand-cement slurry and rubber grain has and strengthens significantly, and the intensity of modified concrete holllow building block can improve more than 30%.
Namely, rubber grain immersion treatment 20 minutes in the KOH solution of 20%, there is obvious modified effect: contrast and experiment shows, admixture utilizes 20%K0H solution to the sand-cement slurry of the rubber grain after the modifying surface of rubber grain, than the sand-cement slurry of direct admixture without the rubber grain of KOH solution modification, slump increase rate is at least 26%.
In immersion treatment process, the following chemical reaction of main generation:
Zn(C
17H
35COO)
2+KOH＝2K(C
17H
35COO)+K
2(Zn(OH)
4)
Product due to above-mentioned chemical reaction: K (C
17h
35and K COO)
2(Zn (OH)
4, all soluble in water, therefore follow-up clear water rinse step, can remove the K (C being attached to rubber particle surface fully effectively
17h
35cOO), K
2(Zn (OH)
4with residual KOH solution.
To sum up, can find out, the technique effect that technique scheme is directly brought is,
1, significantly improve the binding ability between waste tire rubber granule and sand-cement slurry and binding strength;
2, simple, the raw material of whole preparation technology is easy to obtain and cheap for manufacturing cost;
3, the concrete hollow block prepared, has higher ultimate compression strength, may be used for building by laying bricks or stones of the buildings bearing wall of different load bearing stength demand.
Be preferably, above-mentioned cement is P.O42.5R cement; In the apparent density of thick river sand be 2590kg/m
3; The particle diameter of rubble and/or cobble is continuous, and apparent density is 2710kg/m
3.
The technique effect that this optimal technical scheme is directly brought is, the object adopting P.O42.5R cement to shorten the cycle of the demoulding and maintenance further;
Employing apparent density is 2590kg/m
3in thick river sand, and particle diameter continuously, apparent density is 2710kg/m
3rubble and/or cobble, its objective is, can be 0.1-5mm with particle diameter better, size grading is respectively by weight: particle diameter be 0.1-0.16mm account for 5%, particle diameter be 0.16-0.315mm account for 8%, particle diameter be 0.315-0.63mm account for 15%, particle diameter be 0.63-1.25mm account for 22%, particle diameter be 1.25-2.5mm account for 30%, particle diameter be 2.5-5mm account for 20% rubber grain, form organic assembling between three, be beneficial to better rubber grain and in thick river sand be uniformly dispersed in whole concrete sand slurry system;
And the tiny rubber grain of particle diameter and the tiny river sand of particle diameter, the space between concrete mortar gathers materials effectively can be filled, ensure the sufficient closely knit effect of concrete mortar further, improve the ultimate compression strength of end article concrete hollow block.
In sum, the concrete hollow block preparation method of interpolation waste tire rubber granule of the present invention and the concrete hollow block prepared thereof, relative to prior art, have following beneficial effect:
1, production unit and technique are simple, manufacturing cost is lower;
2, prepared concrete hollow block, has the over-all propertieies such as good insulation, heat insulation, sound insulation, light weight, environmental protection concurrently;
3, significantly improve the binding ability between waste tire rubber granule and sand-cement slurry and binding strength, the concrete hollow block adopting the inventive method to prepare, is suitable for use as the bearing building block of the buildings of different load bearing stength demand.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
Embodiment 1
Take successively/measure P.O42.5R cement 375kg, water 134kg, in thick river sand 607.2kg, rubble and/or cobble 1180kg; The rubber grain 21.8kg of continuous grading, water reducer 2.385kg;
First by rubber grain through 20%KOH solution soaking 20min, rear clear water clean, airing to saturation plane do;
By in thick river sand, cement, water reducer and rubber grain add in stirrer to add water and stir;
Add rubble and/or cobble again, be stirred to obtain and mix and stir concrete grout; After concrete grout is entered in forming machine shaping, after successively through maintenance, the demoulding, more namely the maintenance carried out under natural condition obtains concrete hollow block.
Detected result: monolithic concrete hollow block ultimate compression strength minimum value >=11MPa, 5 block concrete holllow building block ultimate compression strength mean value >=13MPa, meet the resistance to compression standard of strength grade MU10 bearing building block;
The hole ratio mean value of concrete hollow block is 50%, and thermal conductivity is less than or equal to 0.93W/mK, and aerated density is about 1380kg/m
3.
Embodiment 2
Take successively by weight label be 42.5 ordinary Portland cement 360kg, water 129kg, in thick river sand 601.3kg, rubble and/or cobble 1210kg; The rubber grain 23.7kg of continuous grading, water reducer 2.385kg;
All the other steps are with embodiment 1.
Detected result: monolithic concrete hollow block ultimate compression strength minimum value >=10.2MPa, 5 block concrete holllow building block ultimate compression strength mean value >=12.4MPa, meet the resistance to compression standard of strength grade MU10.0 bearing building block;
The hole ratio mean value of concrete hollow block is 52%, and thermal conductivity is less than or equal to 0.90W/mK, and aerated density is about 1358kg/m
3.
Embodiment 3
Take successively by weight P.O42.5R cement 342kg, water 122kg, in thick river sand 595.4kg, rubble and/or cobble 1270kg; The rubber grain 29.6kg of continuous grading, water reducer 2.385kg;
All the other steps are with embodiment 1.
Detected result: monolithic concrete hollow block ultimate compression strength minimum value >=9.8MPa, 5 block concrete holllow building block ultimate compression strength mean value >=11.8MPa, meet the resistance to compression standard of strength grade MU10.0 bearing building block;
The hole ratio mean value of concrete hollow block is 53.3%, and thermal conductivity is less than or equal to 0.85W/mK, and aerated density is about 1320kg/m
3.
Embodiment 4
Take successively by weight P.O42.5R cement 330kg, water 118kg, in thick river sand 589.4kg, rubble and/or cobble 1270kg; The rubber grain 35.6kg of continuous grading, water reducer 2.385kg;
All the other steps are with embodiment 1.
Detected result: monolithic concrete hollow block ultimate compression strength minimum value >=9.1MPa, 5 block concrete holllow building block ultimate compression strength mean value >=11.0MPa, meet the resistance to compression standard of strength grade MU10.0 bearing building block;
The voidage of concrete hollow block is about 55%, and thermal conductivity is less than or equal to 0.82W/mK, and aerated density is about 1290kg/m
3.
Embodiment 5
Take successively by weight label be 42.5 ordinary Portland cement 325kg, water 108kg, in thick river sand 583.5kg, rubble and/or cobble 1300kg; The rubber grain 41.5kg of continuous grading, water reducer 2.385kg;
All the other steps are with embodiment 1.
Detected result: monolithic concrete hollow block ultimate compression strength minimum value >=8.6MPa, 5 block concrete holllow building block ultimate compression strength mean value >=10.3MPa, meet the resistance to compression standard of strength grade MU10.0 bearing building block;
The voidage of concrete hollow block is about 56.8%, and thermal conductivity is less than or equal to 0.78W/mK, and aerated density is about 1263kg/m
3.
Embodiment 6
Take successively by weight P.O42.5R cement 318kg, water 106kg, in thick river sand 577.6kg, rubble and/or cobble 1300kg; The rubber grain 47.4kg of continuous grading, water reducer 2.385kg;
All the other steps are with embodiment 1.
Detected result: monolithic concrete hollow block ultimate compression strength minimum value >=7.9MPa, 5 block concrete holllow building block ultimate compression strength mean value >=9.2MPa, meet the resistance to compression standard of strength grade MU7.5 bearing building block;
The voidage of concrete hollow block is about 57.4%, and thermal conductivity is less than or equal to 0.75W/mK, and aerated density is about 1238kg/m
3.
Embodiment 7
Take successively by weight P.O42.5R cement 310kg, water 111kg, in thick river sand 571.7kg, rubble and/or cobble 1250kg; The rubber grain 53.3kg of continuous grading, water reducer 2.385kg;
All the other steps are with embodiment 1.
Detected result: monolithic concrete hollow block ultimate compression strength minimum value >=6.5MPa, 5 block concrete holllow building block ultimate compression strength mean value >=8.0MPa, meet the resistance to compression standard of strength grade MU7.5 bearing building block;
The voidage of concrete hollow block is about 58.9%, and thermal conductivity is less than or equal to 0.71W/mK, and aerated density is about 1206kg/m
3.
Embodiment 8
Take successively by weight P.O42.5R cement 302kg, water 108kg, in thick river sand 565.7kg, rubble and/or cobble 1250kg; The rubber grain 59.3kg of continuous grading, water reducer 2.385kg;
All the other steps are with embodiment 1.
Detected result: monolithic concrete hollow block ultimate compression strength minimum value >=6.0MPa, 5 block concrete holllow building block ultimate compression strength mean value >=7.5MPa, meet the resistance to compression standard of strength grade MU7.5 bearing building block;
The voidage of concrete hollow block is about 60.2%, and thermal conductivity is less than or equal to 0.75W/mK, and aerated density is about 1173kg/m
3.
It should be noted that, in above-described embodiment 1-embodiment 8, " rubber grain of continuous grading " addressed all refers to: particle diameter is 0.1-5mm, size grading is respectively by weight: particle diameter be 0.1-0.16mm account for 5%, particle diameter be 0.16-0.315mm account for 8%, particle diameter be 0.315-0.63mm account for 15%, particle diameter be 0.63-1.25mm account for 22%, particle diameter be 1.25-2.5mm account for 30%, particle diameter be 2.5-5mm account for 20% rubber grain.Above-mentioned " rubber grain " is all be that raw material is obtained by normal temperature crush method with junked tire.
Claims (2)
1. one kind is added the preparation method of the concrete hollow block of waste tire rubber granule, it is characterized in that, raw materials parts by weight be cement 302-375 part, in thick river sand 565.7-607.2 part, rubble and/or cobble 1180-1300 part, rubber grain 21.8-59.3 part, water reducer 2.385 parts, water 106-134 part;
The main performance index of holllow building block is as follows: hole ratio is 50-60.2%, and thermal conductivity is 0.68-0.93W/mK, and aerated density is 1173-1380kg/m
3, mean compressive strength value is 7.5-13.0MPa;
Preparation method comprises the steps:
(1), first by rubber grain immersion treatment 20min in 20%KOH solution, clean with clear water, then through airing to saturated dry surface;
(2), by thick river sand, cement, water reducer and rubber grain add in stirrer, mix and stir;
(3), limit add waterside stir, wrap up rubber grain completely to sand-cement slurry;
(4), add rubble and/or cobble, be stirred to evenly while add waterside, obtain and mix and stir concrete grout;
(5), concrete grout is entered in forming machine shaping, after successively through maintenance, the demoulding, then maintenance and get final product under field conditions (factors);
Above-mentioned rubber grain is that raw material adopts normal temperature crushing up to obtain with junked tire, its particle diameter is 0.1-5mm, size grading is respectively by weight: particle diameter be 0.1-0.16mm account for 5%, particle diameter be 0.16-0.315mm account for 8%, particle diameter be 0.315-0.63mm account for 15%, particle diameter be 0.63-1.25mm account for 22%, particle diameter be 1.25-2.5mm account for 30%, particle diameter be 2.5-5mm account for 20%.
2. the preparation method of the concrete hollow block of interpolation waste tire rubber granule according to claim 1, is characterized in that, described cement is P.O42.5R cement;
In described, the apparent density of thick river sand is 2590kg/m
3;
The particle diameter continuous distribution of described rubble and/or cobble, apparent density is 2710kg/m
3.
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Cited By (1)
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| CN107555825A (en) * | 2017-10-11 | 2018-01-09 | 内蒙古农业大学 | The method of modifying of rubber grain and its application in the preparation of natural pumice concrete |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108264254B (en) * | 2018-02-01 | 2020-12-08 | 佛山科学技术学院 | Preparation process of modified rubber particles for rubber concrete |
| CN111454077A (en) * | 2020-05-12 | 2020-07-28 | 长春建筑学院 | Method for accurately controlling concrete porosity and application thereof |
| CN113929376B (en) * | 2020-06-29 | 2022-09-09 | 比亚迪股份有限公司 | Rubber concrete, preparation method thereof and bridge |
| CN113788705B (en) * | 2021-09-01 | 2022-07-22 | 孙志远 | Composite heat-insulating building block for building |
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| CN102649633A (en) * | 2012-05-04 | 2012-08-29 | 中国十七冶集团有限公司 | Novel post-cast strip concrete |
| CN103265245A (en) * | 2013-06-09 | 2013-08-28 | 浙江方远建材科技有限公司 | Rubber noise-reduction wear-resistant road brick and preparation method thereof |
| CN103787605A (en) * | 2014-02-25 | 2014-05-14 | 河南省水利科学研究院 | Modification method of rubber particles and modified rubber concrete |
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| US8002890B2 (en) * | 2002-10-11 | 2011-08-23 | Advanced Technology Co., Ltd. | Mortar composition |
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|---|---|---|---|---|
| CN102557555A (en) * | 2011-12-28 | 2012-07-11 | 河南大学 | Mineral fiber-modified flexible rubber concrete |
| CN102649633A (en) * | 2012-05-04 | 2012-08-29 | 中国十七冶集团有限公司 | Novel post-cast strip concrete |
| CN103265245A (en) * | 2013-06-09 | 2013-08-28 | 浙江方远建材科技有限公司 | Rubber noise-reduction wear-resistant road brick and preparation method thereof |
| CN103787605A (en) * | 2014-02-25 | 2014-05-14 | 河南省水利科学研究院 | Modification method of rubber particles and modified rubber concrete |
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| CN107555825A (en) * | 2017-10-11 | 2018-01-09 | 内蒙古农业大学 | The method of modifying of rubber grain and its application in the preparation of natural pumice concrete |
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