CN103553471B - Method for manufacturing water permeable brick from waste concrete, and pavement method of water permeable brick - Google Patents
Method for manufacturing water permeable brick from waste concrete, and pavement method of water permeable brick Download PDFInfo
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Abstract
The invention discloses a method for manufacturing a water permeable brick from waste concrete, and a pavement method of the water permeable brick. The method for manufacturing the water permeable brick from the waste concrete disclosed by the invention comprises the following steps: taking the waste concrete and crushing, so as to prepare regenerated fine powder and regenerated aggregate; adding the regenerated aggregate, water and cement to a blender and stirring; carrying out mechanical pressing on stirred hybrid materials, so as to prepare a green brick; manufacturing the water permeable brick after naturally maintaining. The invention also provides the pavement method of the water permeable brick. The pavement method of the water permeable brick comprises the following steps: tamping a natural soil layer; paving a mixed soil layer on the natural soil layer; paving the regenerated fine powder on the mixed soil layer as a cushion; finally paving the water permeable brick on the cushion. The water permeable brick is prepared by using the waste concrete, and is creatively paved; a lot of waste concrete can be utilized; the brick surface can absorb about 35% of surface water; underground water is evaporated in a sunny day; the ground temperature can be reduced; the content of pollutants such as particulate matters (PM2.5) in pavement air is reduced.
Description
Technical field
The present invention relates to material of construction, specifically a kind of method of discarded concrete water-permeable brick and the laying method of this water-permeable brick.
Background technology
Concrete works is the leading engineering of extensive civil construction, and concrete is a large amount of material used in material of construction, occupies extremely important status, be subject to people's attention always in construction industry.In recent years, along with socioeconomic development, the building trade like never before develop rapidly of China, new buildings is constantly built, concrete consumption increases, meanwhile, there is a lot of old buildings to need because not meeting modern Economy Development and requiring to remove, thereby produce a large amount of building wastes.According to statistics, the building waste that China produces because of demolition of buildings every year reaches more than 500,000,000 tons, and wherein the ratio of discarded concrete is the highest, huge processing costs and the environmental problem caused thus very outstanding.Current discarded concrete is except part is used as smooth, the low laying areas landfill in workyard, and major part is thrown aside in the refuse landfill in suburb, and weakly alkaline waste residue destroys large stretch of soil.Because concrete material belongs to Pyatyi material, good endurance, this rubbish can not as organism natural decomposition, therefore this pollution is permanent.
And in recent years, after there is heavy showers continuously, all there is serious waterlogging in the cities, various places such as Beijing, Wuhan, Guangzhou.Urban waterlogging problem occurs repeatedly, and has had a strong impact on resident's daily life and work.Total institute is known, and sewerage system fragility is the immediate cause that waterlogging occurs, and meanwhile, because urban construction needs, the lake, pond in a large amount of suburb is landfilled construction, the ability of balance terrace rainwater, increases the weight of the burden of urban sewage pipeline especially once rain.Many cities and small towns are emphasized attractive in appearance simply and use hardened ground in a large number (hardened ground refers to the fluid-tight building materials such as cement, grouan, marble, ornamental brick, pitch, lays city square, commercial street, walkway, parking lot, community activity place in Process of Urban Development.）。And the ground of sclerosis is just as the barrier film be laid on soil, precipitation can only trickle on it, cannot absorbed inside, thus causes urban ground to seep water ability worse and worse, once run into a large amount of rainfall, just easily forms waterlogging.
Summary of the invention
For solving the problem, the invention provides a kind of method of discarded concrete water-permeable brick and the laying method of this water-permeable brick.
The method of discarded concrete water-permeable brick of the present invention, is characterized in that, comprises following production stage:
(1), after getting the crushing of discarded concrete pressure testing machine or hammering fragmentation, the square hole sieve crossing aperture 26.5mm sieves, and obtains square hole sieve screen overflow and the screen underflow of aperture 26.5mm;
1. first, use jaw crusher to carry out fragmentation the square hole sieve screen overflow of aperture 26.5mm, the discharge port of jaw crusher is that 25mm is wide; And then cross the square hole sieve of aperture 4.75mm and sieve, just obtain the square hole sieve screen overflow of aperture 4.75mm, the continuous size fraction regenerated coarse aggregate of to be namely particle diameter be 5 ~ 25mm;
2. in addition, the square hole sieve of the square hole sieve screen underflow aperture 9.5mm of aperture 26.5mm is sieved, obtain square hole sieve screen overflow and the screen underflow of aperture 9.5mm; The square hole sieve screen overflow of aperture 9.5mm also uses jaw crusher to carry out second time fragmentation, and the discharge port of jaw crusher is that 10mm is wide;
3. the square hole sieve screen underflow of aperture 9.5mm sieves with the square hole sieve of the aggregate aperture 4.75mm of the broken gained of second time, obtain square hole sieve screen overflow and the screen underflow of aperture 4.75mm, the simple grain level regenerated coarse aggregate of the square hole sieve screen overflow of aperture 4.75mm to be namely particle diameter be 5 ~ 10mm;
4. the square hole sieve screen underflow of aperture 4.75mm continues to use the square hole sieve of aperture 0.15mm to sieve, obtain square hole sieve screen overflow and the screen underflow of aperture 0.15mm, the continuous size fraction recycled fine aggregate of the square hole sieve screen overflow of aperture 0.15mm to be namely particle diameter be 0.15 ~ 5mm, namely the square hole sieve screen underflow of aperture 0.15mm is the regeneration fine powder of particle diameter ﹤ 0.15mm;
By above-mentioned obtained except the regeneration fine powder of particle diameter ﹤ 0.15mm, the simple grain level regenerated coarse aggregate that the continuous size fraction regenerated coarse aggregate that particle diameter is 5 ~ 25mm, particle diameter are 5 ~ 10mm, particle diameter are that the continuous size fraction recycled fine aggregate of 0.15 ~ 5mm mixes, for subsequent use as regeneration aggregate;
The effect of this step: in above step, discarded concrete can be processed into the regenerated coarse aggregate of two kinds of grades by twice fragmentation and screening, the i.e. continuous size fraction regenerated coarse aggregate of particle diameter to be the simple grain level regenerated coarse aggregate of 5 ~ 10mm and particle diameter be 5 ~ 25mm, also create continuous size fraction recycled fine aggregate that particle diameter is 0.15 ~ 5mm and particle diameter is less than the by products such as the regeneration fine powder of 0.15mm, the various regeneration aggregate proportions obtained are as shown in the table simultaneously:
| Size | Proportion |
| 5～25mm | 64～73% |
| 5～10mm | 13～15% |
| 0.15～5mm | 12～20% |
| <0.15mm | 1～2% |
| Summation | 100% |
Show through statistics, the simple grain level regenerated coarse aggregate proportion of particle diameter to be the continuous size fraction regenerated coarse aggregate of 5 ~ 25mm and particle diameter be 5 ~ 10mm is very big, is applicable to replacing natural sand masonry to be the aggregate producing water-permeable brick;
(2) above-mentioned regeneration aggregate for subsequent use and water, cement are added in stirrer with the weight ratio of 6.5:2.5:1, under the condition of temperature 60 C, humidity 30%, stirred for 45 seconds with the horizontal rotating speed of 1000 ~ 1200rpm;
This step effect: the effect playing cement and regeneration aggregate stirring bonding to greatest extent, increases regeneration aggregate intensity, makes the voidage of brick improve and increase its water permeability;
(3) by the mixed material after stirring routinely technique brick pressing machine carry out mechanical pressing, obtained adobe, after the natural curings of 28 days, obtained water-permeable brick.This brick body resistance to compression can reach 45MPa, and coefficient of permeability reaches 4.5 × 10
-2cm/s, reaches the design requirements of water-permeable brick.
In order on the basis not affecting brick body compressive property, the water permeability of further enhancing brick body, can be in the above-mentioned methods, getting calcite in powder, to be broken to particle diameter be 2 ~ 4mm, getting xanthan gum and water is mixed into glue with the weight ratio of 1:20, is that the calcite particle of 2 ~ 4mm immerses in glue by particle diameter, then by the unnecessary glue of 10 mesh sieve eliminations of the calcite particle after immersion liquid, dry 1 ~ 1.5 hour in 20 ~ 35 DEG C, form the calcite micelle that outside surface is enclosed with glue-line; Then in step (2), add account for cement weight 3 ~ 5% calcite micelle in stirrer, stirred for 45 seconds with regeneration aggregate, water and the cement horizontal rotating speed jointly with 1000 ~ 1200rpm under the condition of temperature 60 C, humidity 30%; Enter step (3) again, the mixed material after stirring is carried out after mechanical pressing obtains adobe, adobe is immersed in the water, then within every 10 minutes, changes a water, 3 ~ 5 times repeatedly; After the brick bat drying after immersion, at the temperature of 850 ~ 900 DEG C, carry out decomposition calcite 20 ~ 30 minutes, last cooling down, to normal temperature (20 ~ 35 DEG C), after the natural curings of 28 days, obtains water-permeable brick.
This step effect: superscribe xanthan gum layer at each independent calcite particle outside surface, both can be used as buffer layer, makes calcite particle can not be blended easily in follow-up stirring; The cohesive force of calcite particle and other material can be increased again, make can not four be scattered by the broken end of calcite particle of rubbing simultaneously, but flocking together of also comparatively concentrating, otherwise the hole that follow-up pyrolytic decomposition produces is too small, affects water-permeable; During adobe immersion, xanthan gum major part after immersion on calcite particle top layer is dissolved and is discharged, the calcite particle be exposed resolves into calcium oxide and carbonic acid gas at the temperature of 850 ~ 900 DEG C, calcite micelle is after the dissolving of xanthan gum and the decomposition of calcite, volume-diminished is half at least, make water-permeable brick inside define multiple hole, the water-absorbent of water-permeable brick is significantly promoted, enhances the water permeable ability of water-permeable brick.
Present invention also offers the laying method of the water-permeable brick that aforesaid method is made, it is characterized in that, comprise the following steps:
(1), compacting natural earth layer thickness is more than 100cm, and compacting degree reaches more than 95%;
(2) regeneration aggregate, step (1) in the method for above-mentioned discarded concrete water-permeable brick prepared and laterite by weight proportion 8:2 carry out being mixed and made into mixed soil, then on the natural soil layer of compacting, spread the mixed soil that thickness is 30 ~ 35cm, water and compacting;
(3), on mixed soil, repave the regeneration fine powder 2 ~ 4cm of particle diameter ﹤ 0.15mm prepared by step (1) in the method for above-mentioned discarded concrete water-permeable brick as bed course, abundant compacting flattens;
(4) last on bed course, lay water-permeable brick obtained in the method for above-mentioned discarded concrete water-permeable brick, between brick and brick, space distance reaches 3 ~ 5mm, and fills this space with the sand that particle diameter is 1.3 ~ 2.5mm.
By above laying method, not only terrace water can permeate recharge of groundwater easily, and underground water can also go out ground by evaporating-osmosis, just as the ground that can breathe.Play the effect of similar dust-proof watering of sweeping the floor, these droplets got up from underground evaporation not only can prevent building and dust on the roads, more can combine with the PM2.5 in air and depend on, increase its equivalent diameter and make it to drop to ground.1m
2water-permeable brick road surface, under the solar radiation of solar temperature 30 DEG C, ascension Groundwater steam height reaches more than 6m, and haze can be made in air by capillary pressure, forms 6m
3fresh air space, make 6m
3haze disappear.
According to this laying method, every square metre of water-permeable brick road surface, can consume 0.32m
3recycled aggregate of waste concrete, recycled aggregate of waste concrete compacted density is according to 2.11*10
3kg/m
3calculate, every square metre of water-permeable brick road surface can consume discarded concrete and be about 675kg.
The present invention makes water-permeable brick by using discarded concrete, and carries out creativeness laying, can use discarded concrete in a large number.When running into rainfall, brick face can absorb surface water and reach about 35%, every 1m
2water-permeable brick road surface pavement, 0.15-0.25 m can be absorbed
3the surface water.Rainwater drops to brick face, and the soil under brick face constantly as sponge can drink up the rain and store, and is formed " sponge effect ", can effectively reduce municipal sewage system waterlogging, reaches original lake, pond be landfilled and keeps the isorrheic ability of terrace rain.Simultaneously recharge of groundwater position, fine day evaporation underground water, can reduce surface temperature, the pollutant load such as PM2.5 in the nitride in decomposing automobile exhaust and sulfide, minimizing road surface air.
Accompanying drawing explanation
Fig. 1 is in the method steps (1) of discarded concrete water-permeable brick of the present invention, carries out the schema sieved after getting the crushing of discarded concrete pressure testing machine or hammering fragmentation.
Embodiment
Embodiment 1: as shown in Figure 1, the method for discarded concrete water-permeable brick, is characterized in that, comprises following production stage:
(1), after getting the crushing of discarded concrete pressure testing machine or hammering fragmentation, the square hole sieve crossing aperture 26.5mm sieves, and obtains square hole sieve screen overflow and the screen underflow of aperture 26.5mm;
1. first, use jaw crusher to carry out fragmentation the square hole sieve screen overflow of aperture 26.5mm, the discharge port of jaw crusher is that 25mm is wide; And then cross the square hole sieve of aperture 4.75mm and sieve, just obtain the square hole sieve screen overflow of aperture 4.75mm, the continuous size fraction regenerated coarse aggregate of to be namely particle diameter be 5 ~ 25mm;
2. in addition, the square hole sieve of the square hole sieve screen underflow aperture 9.5mm of aperture 26.5mm is sieved, obtain square hole sieve screen overflow and the screen underflow of aperture 9.5mm; The square hole sieve screen overflow of aperture 9.5mm also uses jaw crusher to carry out second time fragmentation, and the discharge port of jaw crusher is that 10mm is wide;
3. the square hole sieve screen underflow of aperture 9.5mm sieves with the square hole sieve of the aggregate aperture 4.75mm of the broken gained of second time, obtain square hole sieve screen overflow and the screen underflow of aperture 4.75mm, the simple grain level regenerated coarse aggregate of the square hole sieve screen overflow of aperture 4.75mm to be namely particle diameter be 5 ~ 10mm;
4. the square hole sieve screen underflow of aperture 4.75mm continues to use the square hole sieve of aperture 0.15mm to sieve, obtain square hole sieve screen overflow and the screen underflow of aperture 0.15mm, the continuous size fraction recycled fine aggregate of the square hole sieve screen overflow of aperture 0.15mm to be namely particle diameter be 0.15 ~ 5mm, namely the square hole sieve screen underflow of aperture 0.15mm is the regeneration fine powder of particle diameter ﹤ 0.15mm;
By above-mentioned obtained except the regeneration fine powder of particle diameter ﹤ 0.15mm, the simple grain level regenerated coarse aggregate that the continuous size fraction regenerated coarse aggregate that particle diameter is 5 ~ 25mm, particle diameter are 5 ~ 10mm, particle diameter are that the continuous size fraction recycled fine aggregate of 0.15 ~ 5mm mixes, for subsequent use as regeneration aggregate;
(2) above-mentioned regeneration aggregate for subsequent use and water, cement are added in stirrer with the weight ratio of 6.5:2.5:1, under the condition of temperature 60 C, humidity 30%, stirred for 45 seconds with the horizontal rotating speed of 1100rpm;
(3) by the mixed material after stirring routinely technique brick pressing machine carry out mechanical pressing, obtained adobe, after the natural curings of 28 days, the water-permeable brick of obtained embodiment 1.
The laying method of the water-permeable brick of embodiment 1, is characterized in that, comprises the following steps:
(1), compacting natural earth layer thickness is 110cm, and compacting degree reaches 97%;
(2), by the method for the discarded concrete water-permeable brick of embodiment 1, regeneration aggregate prepared by step (1) and laterite by weight proportion 8:2 carry out being mixed and made into mixed soil, then on the natural soil layer of compacting, spread the mixed soil that thickness is 32cm, water and compacting;
(3), on mixed soil, repave in the method for discarded concrete water-permeable brick of embodiment 1, the regeneration fine powder 2 ~ 4cm of particle diameter ﹤ 0.15mm prepared by step (1) is as bed course, and abundant compacting flattens;
(4) last on bed course, lay the water-permeable brick that embodiment 1 is obtained, between brick and brick, space distance reaches 4mm, and fills this space with the sand that particle diameter is 1.5mm.
Embodiment 2: as different from Example 1, in the method for discarded concrete water-permeable brick, getting calcite in powder, to be broken to particle diameter be 3mm, get xanthan gum and water is mixed into glue with the weight ratio of 1:20, be in the calcite particle immersion glue of 3mm by particle diameter, then by the unnecessary glue of 10 mesh sieve eliminations of the calcite particle after immersion liquid, dry 1.2 hours in 25 DEG C, form the calcite micelle that outside surface is enclosed with glue-line; Then in step (2), add account for cement weight 4% calcite micelle in stirrer, stirred for 45 seconds with regeneration aggregate, water and the cement horizontal rotating speed jointly with 1100rpm under the condition of temperature 60 C, humidity 30%; Enter step (3) again, the mixed material after stirring is carried out after mechanical pressing obtains adobe, adobe is immersed in the water, then within every 10 minutes, changes a water, 4 times repeatedly; After the brick bat drying after immersion, at the temperature of 880 DEG C, carry out decomposition calcite 25 minutes, last cooling down to 25 DEG C, after the natural curings of 28 days, the water-permeable brick of obtained embodiment 2.
The laying method of the water-permeable brick of embodiment 2 and the identical of embodiment 1.
Claims (2)
1. the method for discarded concrete water-permeable brick, is characterized in that, comprises following production stage:
(1), after getting the crushing of discarded concrete pressure testing machine or hammering fragmentation, the square hole sieve crossing aperture 26.5mm sieves, and obtains square hole sieve screen overflow and the screen underflow of aperture 26.5mm;
1. first, use jaw crusher to carry out fragmentation the square hole sieve screen overflow of aperture 26.5mm, the discharge port of jaw crusher is that 25mm is wide; And then cross the square hole sieve of aperture 4.75mm and sieve, just obtain the square hole sieve screen overflow of aperture 4.75mm, the continuous size fraction regenerated coarse aggregate of to be namely particle diameter be 5 ~ 25mm;
2. in addition, the square hole sieve of the square hole sieve screen underflow aperture 9.5mm of aperture 26.5mm is sieved, obtain square hole sieve screen overflow and the screen underflow of aperture 9.5mm; The square hole sieve screen overflow of aperture 9.5mm also uses jaw crusher to carry out second time fragmentation, and the discharge port of jaw crusher is that 10mm is wide;
3. the square hole sieve screen underflow of aperture 9.5mm sieves with the square hole sieve of the aggregate aperture 4.75mm of the broken gained of second time, obtain square hole sieve screen overflow and the screen underflow of aperture 4.75mm, the simple grain level regenerated coarse aggregate of the square hole sieve screen overflow of aperture 4.75mm to be namely particle diameter be 5 ~ 10mm;
4. the square hole sieve screen underflow of aperture 4.75mm continues to use the square hole sieve of aperture 0.15mm to sieve, obtain square hole sieve screen overflow and the screen underflow of aperture 0.15mm, the continuous size fraction recycled fine aggregate of the square hole sieve screen overflow of aperture 0.15mm to be namely particle diameter be 0.15 ~ 5mm, namely the square hole sieve screen underflow of aperture 0.15mm is the regeneration fine powder of particle diameter ﹤ 0.15mm;
By above-mentioned obtained except the regeneration fine powder of particle diameter ﹤ 0.15mm, the simple grain level regenerated coarse aggregate that the continuous size fraction regenerated coarse aggregate that particle diameter is 5 ~ 25mm, particle diameter are 5 ~ 10mm, particle diameter are that the continuous size fraction recycled fine aggregate of 0.15 ~ 5mm mixes, for subsequent use as regeneration aggregate;
Getting calcite in powder, to be broken to particle diameter be 2 ~ 4mm, get xanthan gum and water is mixed into glue with the weight ratio of 1:20, be in the calcite particle immersion glue of 2 ~ 4mm by particle diameter, then by the unnecessary glue of 10 mesh sieve eliminations of the calcite particle after immersion liquid, dry 1 ~ 1.5 hour in 20 ~ 35 DEG C, form the calcite micelle that outside surface is enclosed with glue-line;
(2) above-mentioned regeneration aggregate for subsequent use and water, cement are added in stirrer with the weight ratio of 6.5:2.5:1, and add account for cement weight 3 ~ 5% calcite micelle in stirrer, under the condition of temperature 60 C, humidity 30%, stirred for 45 seconds with the horizontal rotating speed of 1000 ~ 1200rpm;
(3) by the mixed material after stirring routinely technique brick pressing machine carry out mechanical pressing, after obtained adobe, adobe is immersed in the water, then within every 10 minutes, changes a water, 3 ~ 5 times repeatedly; After the brick bat drying after immersion, at the temperature of 850 ~ 900 DEG C, carry out decomposition calcite 20 ~ 30 minutes, last cooling down, to normal temperature, after the natural curings of 28 days, obtains water-permeable brick.
2. the laying method of the water-permeable brick that the method for discarded concrete water-permeable brick is made described in claim 1, is characterized in that, comprise the following steps:
(1), compacting natural earth layer thickness is more than 100cm, and compacting degree reaches more than 95%;
(2) regeneration aggregate, step (1) in the method for discarded concrete water-permeable brick described in claim 1 prepared and laterite by weight proportion 8:2 carry out being mixed and made into mixed soil, then on the natural soil layer of compacting, spread the mixed soil that thickness is 30 ~ 35cm, water and compacting;
(3), on mixed soil, repave the regeneration fine powder 2 ~ 4cm of particle diameter ﹤ 0.15mm prepared by step (1) in the method for discarded concrete water-permeable brick described in claim 1 as bed course, abundant compacting flattens;
(4) last on bed course, lay water-permeable brick obtained in the method for discarded concrete water-permeable brick described in claim 1, between brick and brick, space distance reaches 3 ~ 5mm, and fills this space with the sand that particle diameter is 1.3 ~ 2.5mm.
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|---|---|---|---|---|
| CN106430602A (en) * | 2016-10-28 | 2017-02-22 | 沈阳建筑大学 | Constructed wetland insulating structure |
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| CN105819765A (en) * | 2016-03-16 | 2016-08-03 | 广州世正环保科技发展有限公司 | Water retaining and water permeable brick prepared from construction wastes and manufacturing method thereof |
| CN107814519A (en) * | 2017-11-11 | 2018-03-20 | 黄志鹏 | A kind of method for substituting granite artificial stone with ceramic discarded object |
| CN108249831A (en) * | 2018-01-30 | 2018-07-06 | 黄志鹏 | A kind of method that environment friendly pervious brick is manufactured with building, cardboard, plastic refuse |
| CN109206037A (en) * | 2018-09-28 | 2019-01-15 | 镇江苏博特新材料有限公司 | The surface treatment method and cement base water-permeable brick surface layer of clay brick recycled fine aggregate |
| CN109796172A (en) * | 2019-02-20 | 2019-05-24 | 陕西朗正环保科技有限公司 | It is a kind of using waterworks sludge as brick of raw material and the preparation method and application thereof |
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