CN102677901A - Construction method of horizontal combined member by using large-size waste concrete block - Google Patents
Construction method of horizontal combined member by using large-size waste concrete block Download PDFInfo
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- CN102677901A CN102677901A CN2012101341894A CN201210134189A CN102677901A CN 102677901 A CN102677901 A CN 102677901A CN 2012101341894 A CN2012101341894 A CN 2012101341894A CN 201210134189 A CN201210134189 A CN 201210134189A CN 102677901 A CN102677901 A CN 102677901A
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Abstract
The invention discloses a construction method of a horizontal combined member by using large-size waste concrete blocks. The construction method comprises the steps of: firstly stacking a large quantity of large-size waste concrete blocks in a cavity formed by templates and the steel sections of the horizontal combined member at one time, and then pouring and vibrating new concrete to ensure that spaces among the large-size waste concrete blocks and spaces between the large-size waste concrete blocks and the templates (or the steel sections of the horizontal combined member) are filled with the new concrete. The traditional construction method of alternately placing layers of new concrete and layers of large-size waste concrete blocks in the cavity formed by the templates and the steel sections of the horizontal combined member is changed, the construction process is greatly simplified, the construction speed is obviously improved and a high-efficiency construction method is provided for the construction application of the horizontal combined member by using the large-size waste concrete blocks.
Description
Technical field
The present invention relates to solid waste recycle utilization field, be specifically related to a kind of job practices that adopts the horizontal combination member of large scale discarded concrete block.
Background technology
At present, the discarded concrete overwhelming majority that the old building demolition of China produces all is directly to transport the countryside to stack landfill, and the concrete that new building needs adopts materials such as fresh cement, stone, river sand formulated fully.The harm that causes thus comprises: 1. discarded concrete appropriation of land, contaminated soil and water body; 2. excessively cut into a mountain for quarrying and destroy surface vegetation and original landforms, cause the soil erosion and the deterioration of the ecological environment; 3. a large amount of washing in a pan dug sand breaking-up riverbed, river and dykes and dams, jeopardizes river safety; 4. manufacture of cement consumes mass energy and causes serious environment pollution.For this reason; The discarded concrete how old building demolition of scientific utilization produces; To reduce the consumption of new building as far as possible, become whole building trade and practiced " environmental protection, energy-conservation, reduction of discharging " national strategy institute problem demanding prompt solution materials such as fresh cement, stone, river sand.For this reason, we have proposed in newly-built structure, directly to adopt the thinking of large scale discarded concrete.But in experimental study before and pilot project application; All be that the bottom that at first forms at the shaped steel of template and horizontal combination member is built one deck as placed concrete during construction, and then with large scale discarded concrete block and as placed concrete repeatedly the layering cavity inside of alternately inserting the shaped steel formation of template and horizontal combination member also constantly vibrate.Practice shows that the work progress of this job practices is comparatively loaded down with trivial details, and speed of application is comparatively slow, the construction organization relative complex.Therefore, be necessary actively to seek a kind of industrialized efficient job practices to the application of large scale discarded concrete in newly-built structure.
Summary of the invention
The object of the invention is exactly for overcoming the deficiency of prior art; A kind of job practices that adopts the horizontal combination member of large scale discarded concrete block is provided; The cavity inside that forms through the shaped steel that a large amount of large scale waste concrete block body disposables is deposited in template and horizontal combination member; And then build as placed concrete and vibrate; Thereby abandoned the repeatedly process alternately inserted of layering of large scale discarded concrete block and as placed concrete, simplified work progress greatly, obviously promoted speed of application.
The object of the invention is realized through following method:
Adopt the job practices of the horizontal combination member of large scale discarded concrete block; This method is deposited in the cavity inside that the shaped steel of template and horizontal combination member forms with large scale waste concrete block body disposable, and then build as placed concrete and through vibrate, maintenance obtains said horizontal combination member; The characteristic size of said large scale discarded concrete block is 80～300 mm, and be the horizontal combination member height 1/3～3/4.
In the job practices of the horizontal combination member of above-mentioned employing large scale discarded concrete block, saidly vibrate, maintenance can vibrate and maintenance for the routine that concrete component adopts.
In the job practices of the horizontal combination member of above-mentioned employing large scale discarded concrete block, said large scale discarded concrete block is all or part of reinforcing bar of the removal concret block afterwards that old building, structure, road, bridge or dykes and dams are removed gained.
In the job practices of the horizontal combination member of above-mentioned employing large scale discarded concrete block, said as placed concrete is natural aggregate concrete or regenerated aggregate concrete.
In the job practices of the horizontal combination member of above-mentioned employing large scale discarded concrete block, all be filled with as placed concrete between the said large scale discarded concrete block and between large scale discarded concrete block and template (or shaped steel of the horizontal combination member) inwall.
In the job practices of the horizontal combination member of above-mentioned employing large scale discarded concrete block, said large scale discarded concrete block need fully water moistening before the cavity inside that the shaped steel of putting into template and horizontal combination member forms.
In the job practices of the horizontal combination member of above-mentioned employing large scale discarded concrete block, the mass ratio of said large scale discarded concrete block and as placed concrete is 1:4～1:1.
In the job practices of the horizontal combination member of above-mentioned employing large scale discarded concrete block; Said job practices is: at first that colligation is good reinforcing bar is put into the cavity inside of the shaped steel formation of template and horizontal combination member; Then a large amount of large scale waste concrete block body disposables are deposited in the cavity inside of the shaped steel formation of template and horizontal combination member, the last cavity inside that forms at the shaped steel of template and horizontal combination member is built as placed concrete and is vibrated.
In the prior art; It is generally acknowledged that (mass ratio of large scale discarded concrete block and as placed concrete is that 1:4～1:1) large scale waste concrete block body disposable is deposited in the cavity inside of the shaped steel formation of template and horizontal combination member in a large number; Must cause the ulking thickness of large scale discarded concrete block bigger; Build as placed concrete this moment again; Even can not make as placed concrete fully flow into the bottom of cavity through vibrating, cause can not guarantee between each large scale discarded concrete block and large scale discarded concrete block and template (or shaped steel of horizontal combination member) inwall between fill up as placed concrete, also just can not guarantee its compactness.Also there is same technological prejudice in the present invention at the beginning of research and development; But after through a large amount of tests, show: the composite floor and the compound beam that adopt this job practices to process; Accomplishing the shaped steel of back through peeling off the horizontal combination member through maintenance puts down combined member the filling situation of as placed concrete has been carried out checking that conscientiously the result does not find any voids and pits or small hole with laterally pounding to cut off the water supply.Therefore, job practices disclosed by the invention can ensure that fully as placed concrete is between each large scale discarded concrete block and the density between large scale discarded concrete block and template (or shaped steel of the horizontal combination member) inwall.
The present invention has overcome the prejudice of prior art, has obtained unexpected technique effect, and has following effect:
(1) abandoned the repeatedly construction technology alternately inserted of layering of large scale discarded concrete block and as placed concrete; But a large amount of large scale waste concrete block body disposables are deposited in the cavity inside that the shaped steel of template and horizontal combination member forms; And then build as placed concrete and vibrate; Thereby simplified work progress greatly, obviously promoted speed of application
.
(2) directly adopt large scale discarded concrete block; Exempted the treatment step such as fragmentation, screening, purification of discarded concrete in the regeneration aggregate manufacturing process; Saved the mass energy that these steps consumed; And spent a large amount of cement, water, sandstone and the energy of the regenerated aggregate concrete suitable with large scale discarded concrete block volume preparation, finally be able to discarded concrete recycled with still less the energy and resource consumption.
Description of drawings
Fig. 1 is the schematic perspective view of one embodiment of the invention when adopting the composite floor construction of large scale discarded concrete block;
Fig. 2 is that Fig. 1 adopts the schematic perspective view after the composite floor of large scale discarded concrete block completes;
Fig. 3 is that the A-A of Fig. 2 composite floor of adopting large scale discarded concrete block is to generalized section;
Fig. 4 is the schematic perspective view of one embodiment of the invention when adopting the compound beam construction of large scale discarded concrete block;
Fig. 5 is that Fig. 4 adopts the schematic perspective view after the compound beam of large scale discarded concrete block completes;
Fig. 6 is that the B-B of Fig. 5 compound beam of adopting large scale discarded concrete block is to generalized section.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment practical implementation of the present invention is done further to describe, but enforcement of the present invention and protection domain are not limited thereto.
Like Fig. 1,2, shown in 3, a kind of composite floor that adopts large scale discarded concrete block comprises longitudinal reinforcement 1, shaped steel 3, distribution reinforcement 4, template 5, large scale discarded concrete block 6, as placed concrete 7.Fig. 1 is the schematic perspective view when adopting the composite floor construction of large scale discarded concrete block; Fig. 2 is that Fig. 1 adopts the schematic perspective view after the composite floor of large scale discarded concrete block completes, and Fig. 3 is that the A-A of Fig. 2 composite floor of adopting large scale discarded concrete block is to generalized section.
When adopting the composite floor making of large scale discarded concrete block; (this moment, shaped steel was profiled sheet to a good template earlier; Can bring into play the effect of soffit formwork and part side template); The reinforcing bar that colligation is good is put into the cavity inside of the shaped steel formation of template and horizontal combination member; Then large scale waste concrete block body disposable is deposited in the cavity inside of the shaped steel formation of template and horizontal combination member; At last build as placed concrete and vibrate at the cavity inside of the shaped steel formation of template and horizontal combination member, make between each large scale discarded concrete block and large scale discarded concrete block and template (or shaped steel of horizontal combination member) inwall between all be filled with as placed concrete.
Like Fig. 4,5, shown in 6, a kind of compound beam that adopts large scale discarded concrete block comprises longitudinal reinforcement 1, angle steel tension member 2, shaped steel 3, distribution reinforcement 4, template 5, large scale discarded concrete block 6, as placed concrete 7.Fig. 4 is the schematic perspective view when adopting the compound beam construction of large scale discarded concrete block; Fig. 5 is that Fig. 4 adopts the schematic perspective view after the compound beam of large scale discarded concrete block completes, and Fig. 6 is that the B-B of Fig. 5 compound beam of adopting large scale discarded concrete block is to generalized section.
When adopting the compound beam making of large scale discarded concrete block; (this moment, shaped steel was U type encased steel to a good template earlier; Can bring into play the effect of soffit formwork and part side template); The reinforcing bar that colligation is good is put into the cavity inside of template and shaped steel formation; Then large scale waste concrete block body disposable is deposited in the cavity inside that the shaped steel of template and horizontal combination member forms, builds as placed concrete and vibrate at the cavity inside of the shaped steel formation of template and horizontal combination member at last, make between each large scale discarded concrete block and large scale discarded concrete block and template (or shaped steel of horizontal combination member) inwall between all be filled with as placed concrete.
Embodiment 1: like Fig. 1,2, shown in 3, adopt the profiled sheet-regenerative mixed floor of large scale discarded concrete block.The length overall of test specimen is 2900 mm, and calculated length is 2700 mm, and total floor thickness is 140 mm; Test specimen two end bearings are in and respectively weld a billet under the profiled sheet, thick 10 mm, wide 100 mm, long 600 mm; Peg diameter 16 mm or 13 mm, long 120 mm penetrate profiled sheet and weld on billet in the recessed rib of bearing place profiled sheet; Top, compoboard cross section is provided with two-way φ 8200 reinforced mesh; Profiled sheet thickness is 1 mm; Discarded concrete replacement rate is 30% (the large scale discarded concrete block of being stacked and the mass ratio of as placed concrete are 3:7), and the characteristic size of large scale discarded concrete block is 80 ~ 100 mm.
Before the test specimen formwork; Make two pegs at each groove of plate end, peg passes profiled sheet and billet welding, lays the bidirectional configuration reinforcing bar of φ 8200 at the top of plate; Be welded on the profiled sheet as supporting and putting at the bar dowel of burn-oning on the steel mesh reinforcement, the clean protective layer thickness of distributing bar is 20 mm.
During the test specimen formwork,, install the side wooden form, notice that simultaneously the bottom levels up to guarantee the sample dimensions rule according to physical length, width and the thickness of test specimen with the bed die of profiled sheet as test specimen.
When test specimen is built; Large scale waste concrete block body disposable is deposited in the cavity inside that the shaped steel of template and horizontal combination member forms, builds as placed concrete and adopt artificial internal vibration rod vibrate (also can adopt alternate manner to vibrate) at the cavity inside of the shaped steel formation of template and horizontal combination member at last.Carry out water seasoning every day, maintenance is 28 days altogether.
After maintenance is accomplished, the shaped steel through peeling off the horizontal combination member with laterally pound the flat combined member of cutting off the water supply the filling situation of as placed concrete carried out checking that conscientiously the result does not find any voids and pits or small hole.
Embodiment 2: like Fig. 4,5, shown in 6, adopt the U type encased steel-regenerative mixed beam of large scale discarded concrete block.The strength grade of cast-in-situ concrete, discarded concrete is C30; Discarded concrete replacement rate is 40% (the large scale discarded concrete block of being stacked and the mass ratio of as placed concrete are 4:6), and the characteristic size of large scale discarded concrete block is 150 ~ 180 mm; Steel adopt Q235, steel plate thickness 2 mm, 4 mm; The bottom longitudinal reinforcement adopts HRB400, yield strength f
y=450 N/mm
2Deck-siding b=200 mm, beam height overall h=450 mm, beam span is 5400 mm; Concrete thickness of slab 90 mm, wide 800 mm of plate, the concrete slab distributing bar is φ 6200.
During the test specimen formwork,, install the side wooden form, notice that simultaneously the bottom levels up to guarantee the sample dimensions rule according to physical length, width and the thickness of test specimen with the bed die of U type encased steel as test specimen.The reinforcing bar that colligation is good is put into the cavity inside of the shaped steel formation of template and horizontal combination member.
When test specimen is built; Large scale waste concrete block body disposable is deposited in the cavity inside that the shaped steel of template and horizontal combination member forms, builds as placed concrete and adopt artificial internal vibration rod vibrate (also can adopt alternate manner to vibrate) at the cavity inside of the shaped steel formation of template and horizontal combination member at last.Carry out water seasoning every day, maintenance is 28 days altogether.
After maintenance is accomplished, the shaped steel through peeling off the horizontal combination member with laterally pound the flat combined member of cutting off the water supply the filling situation of as placed concrete carried out checking that conscientiously the result does not find any voids and pits or small hole.
Claims (8)
1. adopt the job practices of the horizontal combination member of large scale discarded concrete block; It is characterized in that large scale waste concrete block body disposable is deposited in the cavity inside that the shaped steel of template and horizontal combination member forms, and then build as placed concrete and through vibrate, maintenance obtains said horizontal combination member; The characteristic size of said large scale discarded concrete block is 80～300 mm, and be the horizontal combination member height 1/3～3/4.
2. the job practices of the horizontal combination member of employing large scale discarded concrete block according to claim 1, the large scale discarded concrete block that it is characterized in that being stacked and the mass ratio of as placed concrete are not more than 1:1.
3. the job practices of the horizontal combination member of employing large scale discarded concrete block according to claim 1 is characterized in that said large scale discarded concrete block is all or part of reinforcing bar of the removal concret block afterwards that old building, structure, road, bridge or dykes and dams are removed gained.
4. the job practices of the horizontal combination member of employing large scale discarded concrete block according to claim 1 is characterized in that said as placed concrete is natural aggregate concrete or regenerated aggregate concrete.
5. the job practices of the horizontal combination member of employing large scale discarded concrete block according to claim 1 is characterized in that making between each large scale discarded concrete block and between large scale discarded concrete block and the template inwall or between the shaped steel inwall of large scale discarded concrete block and horizontal combination member through vibrating all being filled with as placed concrete.
6. the job practices of the horizontal combination member of employing large scale discarded concrete block according to claim 1, it is moistening to it is characterized in that said large scale discarded concrete block watered before the cavity inside that the shaped steel of putting into template and horizontal combination member forms.
7. the job practices of the horizontal combination member of employing large scale discarded concrete block according to claim 1, the large scale discarded concrete block that it is characterized in that being stacked and the mass ratio of as placed concrete are 1:4～1:1.
8. the job practices of the horizontal combination member of employing large scale discarded concrete block according to claim 1 is characterized in that comprising the steps:
The reinforcing bar that the first step is good with colligation is put into the cavity inside of the shaped steel formation of template and horizontal combination member, and the reinforcing bar configuration mode is identical with conventional levels combined member configuration mode;
Second step was deposited in large scale waste concrete block body disposable the cavity inside of the shaped steel formation of template and horizontal combination member;
The 3rd step built as placed concrete and vibrates at the cavity inside of the shaped steel of template and horizontal combination member formation, made between each large scale discarded concrete block and between large scale discarded concrete block and the template inwall or between the shaped steel inwall of large scale discarded concrete block and horizontal combination member and all was filled with as placed concrete.
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| CN107972173A (en) * | 2017-12-01 | 2018-05-01 | 沈阳建筑大学 | Regeneration concrete precast floor slab structure and production method |
| CN109469242A (en) * | 2018-10-30 | 2019-03-15 | 浙江中南建设集团有限公司 | A kind of profiled sheet-regeneration concrete composite floor and its construction method |
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| CN111270769A (en) * | 2020-02-10 | 2020-06-12 | 湖南理工学院 | Basalt fiber concrete section steel composite structure and manufacturing method thereof |
| CN112282213A (en) * | 2020-09-09 | 2021-01-29 | 华南理工大学 | Steel bar regenerated block/aggregate concrete prefabricated column and construction method thereof |
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