CN104058661A - Concrete hollow building block with junked tire rubber granules and preparation method thereof - Google Patents

Concrete hollow building block with junked tire rubber granules and preparation method thereof Download PDF

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Publication number
CN104058661A
CN104058661A CN201410245282.1A CN201410245282A CN104058661A CN 104058661 A CN104058661 A CN 104058661A CN 201410245282 A CN201410245282 A CN 201410245282A CN 104058661 A CN104058661 A CN 104058661A
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particle diameter
cement
concrete hollow
rubber
parts
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CN201410245282.1A
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CN104058661B (en
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潘腾飞
李松辉
单景松
许妍
张同双
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Shandong University of Science and Technology
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Shandong University of Science and Technology
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    • 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 discloses a concrete hollow building block with junked tire rubber granules and a preparation method thereof. The concrete hollow building block is prepared from the following raw materials in parts by weight: 302-375 parts of cement, 565.7-607.2 parts of medium river sand, 1180-1300 parts of gravel and/or rubble, 21.8-59.3 parts of rubber granule, 2.385 parts of water reducing agent and 106-134 parts of water. The preparation method comprises the following steps: immersing the rubber granules in a 20% KOH solution for 20 minutes, cleaning with clear water, and airing to the saturated-surface dry condition; adding the medium river sand, cement, water reducing agent and rubber granules into a stirrer, and stirring; and adding the gravel and/or rubble, adding water, stirring to obtain mixed concrete grout, forming the mixed concrete grout in a forming machine, curing, stripping, and naturally curing. The granularity of the rubber granules is 0.1-5mm, and the size distribution is reasonable. The hollow building block prepared by the method has favorable thermal insulation property, heat insulation property, sound insulation property, light weight and other comprehensive properties, and is suitable to be used as a building load-bearing building block for different load-bearing strength demands.

Description

A kind of concrete hollow block that adds waste tire rubber granule and preparation method thereof
Technical field
The present invention relates to a kind of concrete hollow block and preparation method thereof, relate in particular to a kind of concrete hollow block that adds 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 of very paying close attention to.China is maximum in the world rubber country of consumption, is also maximum in the world tire supply country.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 rubber powder/particle in succession in the utilisation technology of the other sides such as highway, railway, material of construction, and has obtained certain positively effect.As:
Chinese patent application CN102976686B discloses a kind of non-burning brick method that waste old and flyash is main raw material of take.This its fabrication cycle of non-burning brick preparation method is long, and non-burning brick its density of preparing is also larger, 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, it take waste old and cement or sand-cement slurry as starting material, adopt coupling agent that coupling tackiness agent is put on to 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 blend, then water is added in rubber-cement additive and stirred, through mating formation, compacting, the demoulding, maintenance make functional composite material product.It is said, this mechanics of composites intensity is high, good endurance, has the features such as noise reduction, sound insulation, high impact properties, damping vibration attenuation, wear-resisting, anti-electrostatic, waterproof, also has the advantages such as heat-insulation and heat-preservation, environmental protection.
In the preparation process of this matrix material, on the one hand, due to its need to introduce a large amount of coupling agents (for rubber weight 20~40%) carry out rubber surface modification, its rubber grain pretreatment technology is complicated, cost of manufacture is also relatively high; On the other hand, this junked tire reclaims the manufacture for sheet material, is directly used in building structural materials and compares with junked tire is reclaimed, and its junked tire is recycled total amount comparatively speaking, also has larger room for promotion.
At present, the 390mm * 190mm building by laying bricks or stones for bearing wall * 190mm single row of holes concrete hollow block 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 can in concrete hollow block, introduce that density is low, porous, the good waste tire rubber granule of thermal and insulating performance, on the one hand, can significantly improve the porosity of concrete hollow block inside, effectively alleviate the weight of building block; On the other hand, can reduce the thermal conductivity of concrete hollow block, the over-all propertieies such as the heat insulating of raising concrete hollow block, sound insulation.
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 good heat insulating, the soundproof effect of concrete hollow block, enough porositys, and effectively reduce the aerated density of concrete hollow block, on the basis of building block weight (standard block monolithic weight), reduce as far as possible due to rubber grain composition introduce due to the reduction amplitude of concrete segment ultimate compression strength, become a popular problem.
Summary of the invention
One of the object of the invention is, provide a kind of easy construction to add efficiently the concrete hollow block of waste tire rubber granule, 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 demands.
The technical scheme that the present invention adopted is for achieving the above object, a kind of preparation method who adds 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, 2.385 parts of water reducers, 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 of preparing, 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 demands.
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 adopted is for achieving the above object that a kind of preparation method who adds the concrete hollow block of waste tire rubber granule, is characterized in that, described preparation method comprises the steps:
(1), first by rubber grain immersion treatment 20min in 20%KOH solution, with clear water, clean, then through airing to saturated dry surface;
(2), will in thick river sand, cement, water reducer and rubber grain add in stirrer, mix and stir;
(3), limit adds waterside and stirs, and wraps up rubber grain completely to sand-cement slurry;
(4), adding rubble and/or cobble, limit to add waterside is stirred to evenly, makes and mix and stir concrete grout;
(5), concrete grout is entered to moulding in forming machine, after successively through maintenance, the demoulding, then maintenance and get final product under field conditions (factors);
Above-mentioned rubber grain be take junked tire and is made as raw material adopts normal temperature crushing up, its particle diameter is that 0.1-5mm, size grading are respectively by weight: what particle diameter was 0.1-0.16mm accounts 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%, what particle diameter was 2.5-5mm accounts for 20%.
In technique scheme, rubber grain be take junked tire and is made as raw material adopts normal temperature crushing up.Described normal temperature crushing up refers in normal temperature or the environment a little more than normal temperature, prepares a kind of breaking method of rubber powder by mechanical effect; Its pulverization principle is by machinery, rubber to be applied extruding, the multiple physical force such as mills, shears, tears, so that the rubber of junked tire is cut off and to be crushed.The rubber grain that normal temperature crushing up is produced has the features such as surface-area is large, surface is rough and uneven in surface, burr is more.
In technique scheme, rubber grain by laying respectively 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 on Centrifugal vibration sifting bed, carry out Centrifugal vibration screening, to carry out rational grating proportioning.
In tire production process, in rubber, be all added with 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 rubber particle surface is not adhered to or residual Zinic stearas composition is effectively removed, will directly affect the cohesive force between rubber grain and sand-cement slurry.Therefore, in technique scheme, adopt 20% KOH solution to carry out immersion treatment to the rubber grain after normal temperature fragmentation.Concrete immersion process is as follows:
(1) the KOH solution of configuration 20%, half is placed in bucket, and second half waits until follow-up interpolation;
(2) in KOH solution tank, add rubber grain, continue to stir;
(3) in whipping process, constantly add the solution of waiting until interpolation, and constantly vibrate;
(4) immersion treatment, after 20 minutes, leaches rubber grain, cleans airing more dry to saturation plane with clear water.
The rubber grain that KOH solution soaking through 20% is processed, on the one hand, can remove its surface attachment or residual Zinic stearas effectively;
On the other hand, rubber grain soaks and not only can not change the physical and mechanical property of rubber grain in 20%KOH solution, can also improve microcosmic and the macro property of modified concrete: the rubber grain of processing through 20% KOH solution soaking, cohesive force between sand-cement slurry and rubber grain has enhancing significantly, and the intensity of modified concrete holllow building block can improve more than 30%.
; rubber grain immersion treatment 20 minutes in 20% KOH solution; there is obvious modified effect: contrast and experiment shows; the sand-cement slurry of the rubber grain after admixture utilizes 20%K0H solution to the modifying surface of rubber grain; sand-cement slurry than direct admixture without the rubber grain of KOH solution modification, slump increase rate is at least 26%.
In immersion treatment process, mainly there is following chemical reaction:
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 35cOO) and K 2(Zn (OH) 4, all soluble in water, therefore follow-up clear water rinse step, can remove the K (C that is 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 improved binding ability and the binding strength between waste tire rubber granule and sand-cement slurry;
2, whole preparation technology is simple, raw material is easy to obtain and cheap for manufacturing cost;
3, the concrete hollow block of preparing, has higher ultimate compression strength, can building by laying bricks or stones for the buildings bearing wall of different load bearing stength demands.
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 that adopting the object of P.O42.5R cement is further to shorten the cycle of the demoulding and maintenance;
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 that 0.1-5mm, size grading are respectively by weight with particle diameter better: what particle diameter was 0.1-0.16mm accounts 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 is 20% the rubber grain of accounting for of 2.5-5mm, between three, form organic assembling, be beneficial to better rubber grain and in thick river sand in whole concrete sand slurry system, be uniformly dispersed;
And the river sand that the rubber grain that particle diameter is tiny and particle diameter are tiny, effectively fill in the space between can gathering materials to concrete mortar, further guarantees the sufficient closely knit effect of concrete mortar, improves 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 of preparing thereof, with respect 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 improved binding ability and the binding strength between waste tire rubber granule and sand-cement slurry, the concrete hollow block that adopts the inventive method to prepare, is suitable for use as the bearing building block of the buildings of different load bearing stength demands.
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 with clear water clean, airing is dry to saturation plane;
Will in thick river sand, cement, water reducer and rubber grain add and in stirrer, add water and stir;
Add again rubble and/or cobble, be stirred to make and mix and stir concrete grout; After concrete grout is entered to moulding in forming machine, after successively through maintenance, the demoulding, more the maintenance of carrying 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 and 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 55% left and right, 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 and 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 56.8% left and right, 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 57.4% left and right, 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 58.9% left and right, 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 60.2% left and right, 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 that 0.1-5mm, size grading are respectively by weight: what particle diameter was 0.1-0.16mm accounts 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%, what particle diameter was 1.25-2.5mm accounts for 30%, particle diameter is 2.5-5mm accounts for 20% rubber grain.Above-mentioned " rubber grain " is all to take junked tire by normal temperature crush method, to make as raw material.

Claims (3)

1. a concrete hollow block that adds 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, 2.385 parts of water reducers, 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.
2. the preparation method of the concrete hollow block of interpolation waste tire rubber granule as claimed in claim 1, is characterized in that, comprises the steps:
(1), first by rubber grain immersion treatment 20min in 20%KOH solution, with clear water, clean, then through airing to saturated dry surface;
(2), will in thick river sand, cement, water reducer and rubber grain add in stirrer, mix and stir;
(3), limit adds waterside and stirs, and wraps up rubber grain completely to sand-cement slurry;
(4), adding rubble and/or cobble, limit to add waterside is stirred to evenly, makes and mix and stir concrete grout;
(5), concrete grout is entered to moulding in forming machine, after successively through maintenance, the demoulding, then maintenance and get final product under field conditions (factors);
Above-mentioned rubber grain be take junked tire and is made as raw material adopts normal temperature crushing up, its particle diameter is that 0.1-5mm, size grading are respectively by weight: what particle diameter was 0.1-0.16mm accounts 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%, what particle diameter was 2.5-5mm accounts for 20%.
3. the preparation method of the concrete hollow block of interpolation waste tire rubber granule according to claim 2, 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.
CN201410245282.1A 2014-06-05 2014-06-05 A kind of concrete hollow block adding waste tire rubber granule and preparation method thereof Expired - Fee Related CN104058661B (en)

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CN108264254A (en) * 2018-02-01 2018-07-10 佛山科学技术学院 A kind of preparation process of modified rubber particle for 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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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
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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
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108264254A (en) * 2018-02-01 2018-07-10 佛山科学技术学院 A kind of preparation process of modified rubber particle for rubber concrete
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

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