CN104556766A - Construction method for building foundation bed employing recycled concrete - Google Patents
Construction method for building foundation bed employing recycled concrete Download PDFInfo
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- CN104556766A CN104556766A CN201510041969.8A CN201510041969A CN104556766A CN 104556766 A CN104556766 A CN 104556766A CN 201510041969 A CN201510041969 A CN 201510041969A CN 104556766 A CN104556766 A CN 104556766A
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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 construction method for a building foundation bed employing recycled concrete. The method comprises the following steps: (1) producing recycled coarse aggregates by employing waste concrete; and (2) pouring a foundation bed employing recycled materials. The construction method has the beneficial effects that the dependence of engineering on natural stones is relieved; mining of natural resources is reduced; reutilization of solid wastes is achieved; the damage to environment caused by waste concrete blocks is reduced; the environmental protection purpose of the country is reflected; research and innovation of a recycled concrete application technology are facilitated; and relatively comprehensive and specified recycled concrete using standard is gradually formed.
Description
Technical field
The present invention relates to a kind of building foundation cushion construction method utilizing regeneration concrete.
Background technology
In building field, blinding layer is the middle layer of reinforced concrete foundation and foundation soil, and in order to make, surface of base is smooth to be convenient in assembling reinforcement above its Main Function, and plays the effect on protection basis.Those blinding layers need to consume certain resource, be not again very high to the requirement of concrete strength, therefore in natural resources day by day deficient today, available discarded concrete replace part course, not only can economize on resources, can be again the approach that solidification disposal of waste provides a kind of resource utilization.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of building foundation cushion construction method utilizing regeneration concrete.
The present invention is achieved through the following technical solutions.
Utilize a building foundation cushion construction method for regeneration concrete, step comprises:
(1) discarded concrete is utilized to produce regenerated coarse aggregate:
1. waste concrete stockyard: reclaim waste concrete, and by its stockyard;
2. artificial removal of impurities: first by the waste concrete block precrushing of large volume; Then alignment cutting reinforcing bar; The last impurity therefrom screening out bulk;
3. primary crushing: use jaw crusher to carry out primary crushing the waste concrete after artificial removal of impurities, obtain aggregate;
4. sieve: the waste concrete of primary crushing is sent in sieve apparatus, sifts out particle diameter and be less than differential stockyard at the bottom of the sieve of 5mm, remainingly enter next step operation;
5. secondary breaking: use cone crusher to carry out secondary breaking;
6. first time vibratory screening apparatus: by the aggregate of secondary breaking use magnetic separator carry out first time vibratory screening apparatus, sift out particle diameter and be less than differential stockyard at the bottom of the sieve of 5mm, remaining enter next operate;
7. second time vibratory screening apparatus: use magnetic separator to carry out second time vibratory screening apparatus, the aggregate being greater than 37.5mm is returned 5. secondary breaking---7. second time vibratory screening apparatus repetitive operation, is not more than 37.5mm by remaining particle diameter and the aggregate being not less than 5mm enters next operates;
8. rinse: particle diameter is not more than 37.5mm and the aggregate being not less than 5mm is washed;
9. dry: carry out drying be not more than the condition of 80 DEG C in temperature under and dry, be dried to water content and be less than 1%, obtain regenerated coarse aggregate and concentrate and preserve;
(2) twice-laid stuff is utilized to build blinding layer:
1. preparation of construction: the surface dust on cleaning foundation ditch surface, machinery is cut the earth to the above 300mm of substrate absolute altitude, then hand digging is trimmed to substrate absolute altitude;
2. building foundation bed course regeneration concrete configures:
Unit is component cube consumption kg/m
3, composition comprises: cement 260 ~ 320, water 155 ~ 165, fine aggregate 780-850, coarse aggregate 980-1040, flyash 60 ~ 90, high performance water reducing agent of polyocarboxy acid 4.0 ~ 5.0;
Wherein, cement be silicate cement, ordinary Portland cement or Portland blast furnace slag cement any one, its strength grade is not less than 32.5 grades; Fine aggregate is medium sand or coarse sand, and silt content is not more than 3%; In coarse aggregate, regenerated coarse aggregate accounts for coarse aggregate total amount and is not more than 70%, and its maximum particle diameter is not more than 2/3 of cushion thickness, and silt content is not more than 2%;
3. building foundation bed course regeneration concrete bed course build, maintenance:
Adopt fixed vehicle-mounted building foundation bed course regeneration concrete transferpump, pump truck is located at foundation ditch limit, delivery pump pipe is set up by building order when building bed course, first sprinkle water in basic unit before laying concrete cushion moistening, and brush one deck plain cement sand syrup, its water cement ratio 0.4-0.5:1, then lay from one end, can lay by piecemeal when laying area is larger, note in process of deployment leaving construction joint, before building foundation bed course regeneration concrete bed course is built, insert reinforcing bar and control stake as absolute altitude, spacing 1500mm; With spade paving, thickness, a little more than levelling heap, carries out concrete vibrating with flat-plate vibrator immediately, when thickness is more than 20cm, should adopt poker vibrator, its miles of relative movement is not more than 1.5 times of left and right radius, accomplish not leak to shake, guarantee closely knit, after concrete vibrating is closely knit, to be as the criterion inspection planeness with elevation line horizontal on wall and levelling heap, high shovel falls, recess fills, and strikes off with byatt darby, and surface is rubbed with the hands flat again with wooden float;
After building foundation bed course regeneration concrete bed course has built receipts light, be covered in concrete surface with plastic cloth, reached after 1.2Mpa until intensity, after construction completes, about 12h covers and watering maintenance, preserving period, is no less than 7d, if during winter construction operation, envrionment temperature is not less than+5 DEG C.
Beneficial effect of the present invention:
Alleviate the dependence of engineering to natural rock, decrease the exploitation to natural resources; Achieve the recycling of solid waste, decrease the destruction of waste concrete block to environment, embody the aim of national green environmental protection; Be conducive to research and the innovation of regeneration concrete utilisation technology, the regeneration concrete progressively forming specification more comprehensively uses standard.
Accompanying drawing explanation
Fig. 1 is that the present invention utilizes discarded concrete to produce the schematic flow sheet of regenerated coarse aggregate;
Fig. 2 is that the present invention utilizes twice-laid stuff to build the schematic flow sheet of blinding layer.
Embodiment
According to drawings and embodiments the present invention is described in further detail below.
Fig. 1 is that the present invention utilizes discarded concrete to produce the schematic flow sheet of regenerated coarse aggregate, Fig. 2 is that the present invention utilizes twice-laid stuff to build the schematic flow sheet of blinding layer, with reference to Fig. 1, Fig. 2, and the present invention, the building foundation cushion construction method of utilization regeneration concrete, step comprises:
(1) discarded concrete is utilized to produce regenerated coarse aggregate:
1. waste concrete stockyard: reclaim waste concrete, and by its stockyard;
2. artificial removal of impurities: first by the waste concrete block precrushing of large volume; Then alignment cutting reinforcing bar; The last impurity therefrom screening out bulk;
3. primary crushing: use jaw crusher to carry out primary crushing the waste concrete after artificial removal of impurities, obtain aggregate;
4. sieve: the waste concrete of primary crushing is sent in sieve apparatus, sifts out particle diameter and be less than differential stockyard at the bottom of the sieve of 5mm, remainingly enter next step operation;
5. secondary breaking: use cone crusher to carry out secondary breaking;
6. first time vibratory screening apparatus: by the aggregate of secondary breaking use magnetic separator carry out first time vibratory screening apparatus, sift out particle diameter and be less than differential stockyard at the bottom of the sieve of 5mm, remaining enter next operate;
7. second time vibratory screening apparatus: use magnetic separator to carry out second time vibratory screening apparatus, the aggregate being greater than 37.5mm is returned 5. secondary breaking---7. second time vibratory screening apparatus repetitive operation, is not more than 37.5mm by remaining particle diameter and the aggregate being not less than 5mm enters next operates;
8. rinse: particle diameter is not more than 37.5mm and the aggregate being not less than 5mm is washed;
9. dry: carry out drying be not more than the condition of 80 DEG C in temperature under and dry, be dried to water content and be less than 1%, obtain regenerated coarse aggregate and concentrate and preserve;
(2) twice-laid stuff is utilized to build blinding layer:
1. preparation of construction: the surface dust on cleaning foundation ditch surface, machinery is cut the earth to the above 300mm of substrate absolute altitude, then hand digging is trimmed to substrate absolute altitude;
2. building foundation bed course regeneration concrete configures:
Unit is component cube consumption kg/m
3, composition comprises: cement 260 ~ 320, water 155 ~ 165, fine aggregate 780-850, coarse aggregate 980-1040, flyash 60 ~ 90, high performance water reducing agent of polyocarboxy acid 4.0 ~ 5.0;
Wherein, cement be silicate cement, ordinary Portland cement or Portland blast furnace slag cement any one, its strength grade is not less than 32.5 grades; Fine aggregate is medium sand or coarse sand, and silt content is not more than 3%; In coarse aggregate, regenerated coarse aggregate accounts for coarse aggregate total amount and is not more than 70%, and its maximum particle diameter is not more than 2/3 of cushion thickness, and silt content is not more than 2%;
3. building foundation bed course regeneration concrete bed course build, maintenance:
Adopt fixed vehicle-mounted building foundation bed course regeneration concrete transferpump, pump truck is located at foundation ditch limit, delivery pump pipe is set up by building order when building bed course, first sprinkle water in basic unit before laying concrete cushion moistening, and brush one deck plain cement sand syrup, its water cement ratio 0.4-0.5:1, then lay from one end, can lay by piecemeal when laying area is larger, note in process of deployment leaving construction joint, before building foundation bed course regeneration concrete bed course is built, insert reinforcing bar and control stake as absolute altitude, spacing 1500mm; With spade paving, thickness, a little more than levelling heap, carries out concrete vibrating with flat-plate vibrator immediately, when thickness is more than 20cm, should adopt poker vibrator, its miles of relative movement is not more than 1.5 times of left and right radius, accomplish not leak to shake, guarantee closely knit, after concrete vibrating is closely knit, to be as the criterion inspection planeness with elevation line horizontal on wall and levelling heap, high shovel falls, recess fills, and strikes off with byatt darby, and surface is rubbed with the hands flat again with wooden float;
After building foundation bed course regeneration concrete bed course has built receipts light, be covered in concrete surface with plastic cloth, reached after 1.2Mpa until intensity, after construction completes, about 12h covers and watering maintenance, preserving period, is no less than 7d, if during winter construction operation, envrionment temperature is not less than+5 DEG C.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to allow the personage being familiar with this art can understand content of the present invention and be implemented, can not limit the scope of the invention with this.All equivalences done according to spirit of the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (1)
1. utilize the building foundation cushion construction method with regeneration concrete, it is characterized in that, step comprises:
(1) discarded concrete is utilized to produce regenerated coarse aggregate:
1. waste concrete stockyard: reclaim waste concrete, and by its stockyard;
2. artificial removal of impurities: first by the waste concrete block precrushing of large volume; Then alignment cutting reinforcing bar; The last impurity therefrom screening out bulk;
3. primary crushing: use jaw crusher to carry out primary crushing the waste concrete after artificial removal of impurities, obtain aggregate;
4. sieve: the waste concrete of primary crushing is sent in sieve apparatus, sifts out particle diameter and be less than differential stockyard at the bottom of the sieve of 5mm, remainingly enter next step operation;
5. secondary breaking: use cone crusher to carry out secondary breaking;
6. first time vibratory screening apparatus: by the aggregate of secondary breaking use magnetic separator carry out first time vibratory screening apparatus, sift out particle diameter and be less than differential stockyard at the bottom of the sieve of 5mm, remaining enter next operate;
7. second time vibratory screening apparatus: use magnetic separator to carry out second time vibratory screening apparatus, the aggregate being greater than 37.5mm is returned 5. secondary breaking---7. second time vibratory screening apparatus repetitive operation, is not more than 37.5mm by remaining particle diameter and the aggregate being not less than 5mm enters next operates;
8. rinse: particle diameter is not more than 37.5mm and the aggregate being not less than 5mm is washed;
9. dry: carry out drying be not more than the condition of 80 DEG C in temperature under and dry, be dried to water content and be less than 1%, obtain regenerated coarse aggregate and concentrate and preserve;
(2) twice-laid stuff is utilized to build blinding layer:
1. preparation of construction: the surface dust on cleaning foundation ditch surface, machinery is cut the earth to the above 300mm of substrate absolute altitude, then hand digging is trimmed to substrate absolute altitude;
2. building foundation bed course regeneration concrete configures:
Unit is component cube consumption kg/m
3, composition comprises: cement 260 ~ 320, water 155 ~ 165, fine aggregate 780-850, coarse aggregate 980-1040, flyash 60 ~ 90, high performance water reducing agent of polyocarboxy acid 4.0 ~ 5.0;
Wherein, cement be silicate cement, ordinary Portland cement or Portland blast furnace slag cement any one, its strength grade is not less than 32.5 grades; Fine aggregate is medium sand or coarse sand, and silt content is not more than 3%; In coarse aggregate, regenerated coarse aggregate accounts for coarse aggregate total amount and is not more than 70%, and its maximum particle diameter is not more than 2/3 of cushion thickness, and silt content is not more than 2%;
3. building foundation bed course regeneration concrete bed course build, maintenance:
Adopt fixed vehicle-mounted building foundation bed course regeneration concrete transferpump, pump truck is located at foundation ditch limit, delivery pump pipe is set up by building order when building bed course, first sprinkle water in basic unit before laying concrete cushion moistening, and brush one deck plain cement sand syrup, its water cement ratio 0.4-0.5:1, then lay from one end, can lay by piecemeal when laying area is larger, note in process of deployment leaving construction joint, before building foundation bed course regeneration concrete bed course is built, insert reinforcing bar and control stake as absolute altitude, spacing 1500mm; With spade paving, thickness, a little more than levelling heap, carries out concrete vibrating with flat-plate vibrator immediately, when thickness is more than 20cm, should adopt poker vibrator, its miles of relative movement is not more than 1.5 times of left and right radius, accomplish not leak to shake, guarantee closely knit, after concrete vibrating is closely knit, to be as the criterion inspection planeness with elevation line horizontal on wall and levelling heap, high shovel falls, recess fills, and strikes off with byatt darby, and surface is rubbed with the hands flat again with wooden float;
After building foundation bed course regeneration concrete bed course has built receipts light, be covered in concrete surface with plastic cloth, reached after 1.2Mpa until intensity, after construction completes, about 12h covers and watering maintenance, preserving period, is no less than 7d, if during winter construction operation, envrionment temperature is not less than+5 DEG C.
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| CN201510041969.8A CN104556766A (en) | 2015-01-27 | 2015-01-27 | Construction method for building foundation bed employing recycled concrete |
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| CN201510041969.8A CN104556766A (en) | 2015-01-27 | 2015-01-27 | Construction method for building foundation bed employing recycled concrete |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285135A (en) * | 2016-08-09 | 2017-01-04 | 中化（舟山）兴海建设有限公司 | A kind of method that Machine-made Sand is used for petrochemical industry storage tank cushion cap sand bedding course |
| CN108188150A (en) * | 2017-12-29 | 2018-06-22 | 连城县丰海竹木业有限公司 | A kind of bamboo and wood processing industry organic solid castoff sorting disposing system |
| CN108532833A (en) * | 2018-05-15 | 2018-09-14 | 长江大学 | A kind of regeneration concrete coupled column and preparation method thereof |
| CN109534758A (en) * | 2018-12-29 | 2019-03-29 | 浙江春天建设有限公司 | A kind of cement concrete reproduction construction method |
| CN110206139A (en) * | 2019-06-05 | 2019-09-06 | 贵州百胜工程建设咨询有限公司 | A kind of mass concrete construction method |
| CN110563420A (en) * | 2019-09-19 | 2019-12-13 | 中地国际工程有限公司 | construction method of pool |
| CN111423173A (en) * | 2020-01-13 | 2020-07-17 | 武汉长江航道救助打捞局 | D-shaped soft raft of recycled concrete unit blocks and manufacturing method thereof |
| CN112776126A (en) * | 2020-12-31 | 2021-05-11 | 广州市市政工程试验检测有限公司 | Static load test pile-load concrete test block manufacturing method |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106285135A (en) * | 2016-08-09 | 2017-01-04 | 中化（舟山）兴海建设有限公司 | A kind of method that Machine-made Sand is used for petrochemical industry storage tank cushion cap sand bedding course |
| CN108188150A (en) * | 2017-12-29 | 2018-06-22 | 连城县丰海竹木业有限公司 | A kind of bamboo and wood processing industry organic solid castoff sorting disposing system |
| CN108532833A (en) * | 2018-05-15 | 2018-09-14 | 长江大学 | A kind of regeneration concrete coupled column and preparation method thereof |
| CN108532833B (en) * | 2018-05-15 | 2020-04-07 | 长江大学 | Recycled concrete combined column and preparation method thereof |
| CN109534758A (en) * | 2018-12-29 | 2019-03-29 | 浙江春天建设有限公司 | A kind of cement concrete reproduction construction method |
| CN110206139A (en) * | 2019-06-05 | 2019-09-06 | 贵州百胜工程建设咨询有限公司 | A kind of mass concrete construction method |
| CN110563420A (en) * | 2019-09-19 | 2019-12-13 | 中地国际工程有限公司 | construction method of pool |
| CN110563420B (en) * | 2019-09-19 | 2021-10-29 | 中地国际工程有限公司 | Construction method of pool |
| CN111423173A (en) * | 2020-01-13 | 2020-07-17 | 武汉长江航道救助打捞局 | D-shaped soft raft of recycled concrete unit blocks and manufacturing method thereof |
| CN111423173B (en) * | 2020-01-13 | 2021-11-26 | 武汉长江航道救助打捞局 | Method for manufacturing D-shaped soft raft of recycled concrete unit block |
| CN112776126A (en) * | 2020-12-31 | 2021-05-11 | 广州市市政工程试验检测有限公司 | Static load test pile-load concrete test block manufacturing method |
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Application publication date: 20150429 |
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