CN109836101A - A kind of discarded concrete prepares the match ratio and its method of M20 dry powder and mortar - Google Patents
A kind of discarded concrete prepares the match ratio and its method of M20 dry powder and mortar Download PDFInfo
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- CN109836101A CN109836101A CN201910255557.2A CN201910255557A CN109836101A CN 109836101 A CN109836101 A CN 109836101A CN 201910255557 A CN201910255557 A CN 201910255557A CN 109836101 A CN109836101 A CN 109836101A
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- water
- dry powder
- mortar
- fine aggregate
- match ratio
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Abstract
It is recycled fine aggregate that the present invention, which announces a kind of match ratio that discarded concrete prepares M20 dry powder and mortar: cement: water: water-reducing agent: CaCl2In terms of mass parts: 1:(0.204~0.248): (0.165~0.21): (0.0001~0.00015): (0.003~0.0031), selection building waste simultaneously sorts, choose recycled concrete aggregate, it is crushed, and it sieves, recycled fine aggregate is obtained, according to cement, water-reducing agent, water, CaCl2The weight ratio of each component matches, after stirring 1~2 minute with 50% recycled fine aggregate into agitator for cement mortar, remaining recycled fine aggregate is added after 30 seconds in stirring, after stirring 2~4 minutes, dry powder and mortar is obtained, the present invention substitutes natural river sand with recycled fine aggregate, reduces building waste and destroys to natural, the pressure for alleviating natural resources shortage advances construction refuse resource and utilizes industrialization.
Description
Technical field
The present invention relates to the match ratios that a kind of construction material more particularly to a kind of discarded concrete prepare M20 dry powder and mortar
And its method.
Background technique
In recent years, due to the fast development of China's economy, building trade emerges rapidly, but one of bring consequence is just therewith
It is the increase of building castoff.Most building wastes just transport countryside or rural area to by unit in charge of construction, lead without any processing
It has caused to consume a large amount of resource while environmental pollution again.In recent years, China formulates a series of system to promote to build rubbish
The rationalization of rubbish is handled, and is accelerated China's construction refuse resource and is utilized industry development speed, enhances China's construction refuse resource
Utilize industrial technology innovation and the international competitiveness of application of result.
In building trade, the purposes of mortar is very extensive.Wherein, dry powder and mortar has bonding, liner, protection and decoration
Effect has important role in building and fitting-out work.The fast development of China's building trade leads to the natural money in China
Source growing tension, causes irrecoverability to destroy in order to prevent, it would be desirable to find the material of substitution.It is discarded in building waste
Concrete available recycled fine aggregate after crushing and screening, replaces natural river sand using this fine aggregate, as house
The raw material of construction, main meaning are: (1) can alleviate the pressure of natural resources shortage;(2) alleviate the pressure of environmental pollution
Power;(3) expense to building waste cleaning, carrying and landfill is saved;(4) cost of building is reduced.
Summary of the invention
The purpose of the embodiment of the present invention is that providing match ratio and its side that a kind of discarded concrete prepares M20 dry powder and mortar
Method, to solve the problems, such as pollution and river sand natural resources shortage of the building waste to environment.
Above-mentioned purpose can be realized by following scheme:
M20 dry powder and mortar construction waste concrete is prepared the embodiment of the invention discloses a kind of, included following raw materials according component,
Recycled fine aggregate: cement: water: water-reducing agent: CaCl2In terms of mass parts: 1:(0.204~0.248): (0.165~0.21):
(0.001~0.0015): (0.003~0.0031).
The pure concrete debris that the recycled fine aggregate generates when being concrete removal, by crushing, with the side 4.75mm
Hole sizer screening, maximum particle diameter are not more than 4.75mm, and grain composition is continuous grading.Fineness modulus is 2.5~2.8, average
Partial size is 0.4~0.5mm, is continuous grading.
The fineness modulus of discarded concrete recycled fine aggregate described in the embodiment of the present application is 2.67, average grain diameter 0.41.
Cement described in the embodiment of the present application is 325 ordinary portland cements.
Water-reducing agent described in the embodiment of the present application is polycarboxylate water-reducer, it has very strong peptizaiton for cement particle,
The various performances of concrete can be improved and improved comprehensively, can be used with other various composition of concrete admixture.
CaCl described in the embodiment of the present application2For CaCl2Analyze it is pure, effect be excite recycled fine aggregate in fine powder activity.
The present invention provides match ratio and its method that a kind of discarded concrete prepares M20 dry powder and mortar, the method packets
Include following steps:
(1) building waste is selected；
(2) building waste of recycling is sorted, chooses recycled concrete aggregate；
(3) recycled concrete aggregate is crushed, is sieved with 4.75mm square hole screen, select the work that partial size is not more than 4.75mm
For recycled fine aggregate；
(4) cement, water-reducing agent, water, CaCl are matched according to the weight ratio of each component2Afterwards, after hand operated mixing 1~2 minute with 50% again
Raw fine aggregate is added in agitator for cement mortar together；
(5) blender is started, remaining 50% recycled fine aggregate is added after blender stirs 30 seconds and is obtained after stirring 2~4 minutes
To the dry powder and mortar test block.
Beneficial effects of the present invention: fine aggregate all uses discarded concrete recycled fine aggregate, can effectively alleviate and build
Pollution of the building refuse to environment, while river sand resource has been saved again.
Specific embodiment
In order to preferably be explained to the present invention, above scheme will be explained by specific example below.
Embodiment 1
Raw material components in terms of mass parts,
Recycled fine aggregate: cement: water: water-reducing agent: CaCl2=1:0.248:0.165:0.0015:0.0031。
Embodiment 2
Raw material components in terms of mass parts,
Recycled fine aggregate: cement: water: water-reducing agent: CaCl2=1:0.248:0.21:0.001:0.0031。
Embodiment 3
Raw material components in terms of mass parts,
Recycled fine aggregate: cement: water: water-reducing agent: CaCl2=1:0.204:0.165:0.001:0.003。
Embodiment 4
Raw material components in terms of mass parts,
Recycled fine aggregate: cement: water: water-reducing agent: CaCl2=1:0.248:0.178:0.0013:0.0031。
The experimental program of embodiment are as follows: on the basis of 1. research recycled fine aggregates all replace natural river sand, it is suitable to be added
Exciting agent, suitable cement type, with meet replace M20 dry powder and mortar intensity requirement.
2. being directed to water-cement ratio problem, water-reducing agent is added and optimizes.
3. the match ratio that appropriate materials are selected in research.
4. the experimental procedure of the present embodiment is；
A. it arrives construction site and recycles recycled concrete aggregate；
B. broken to recycled concrete aggregate, it is sieved with 4.75mm square hole screen, selects conduct of the partial size no more than 4.75mm again
Raw fine aggregate；
C. the grain composition (sieve method) of recycled fine aggregate is measured
(1) sample is weighed；
(2) by standard screen by hole size it is descending successively arrange from top to bottom, sample is poured into the sieve of top layer, cover
After be put into screening machine screening 10min；
(3) data are recorded, fineness modulus, the average grain diameter of building concrete waste material are measured；
D. cement, water-reducing agent, water, CaCl are matched according to the weight ratio of one to four each component of embodiment2Afterwards, hand operated mixing 1~
2min is sufficiently mixed water-reducing agent with cement slurry, is then added in agitator for cement mortar together with 50% recycled fine aggregate；
E. agitator for cement mortar is started, remaining 50% recycled fine aggregate is added after blender stirs 30 seconds, stirs 2~4 points
Zhong Hou stops stirring, removes sample；
F. consumptive use of water normal consistence is tested；
G. die-filling, demoulding, maintenance；
(1) mold, brush oil are set up；
(2) mortar specimen is packed into die trial；
(3) die trial is placed on plate vibration instrument 15 seconds；
(4) it smoothes out, after being placed at room temperature for 24 hours, demoulding is labelled, is put into insulating box；
H. test intensity is examined:
By the analysis of experiment it follows that the mortar strength and basic performance that this method is designed can satisfy specification and want
It asks, and compared with common river sand, it is possible to reduce 10% or so cement consumption, can effectively replace M20 dry powder and mortar.The present invention
Use the problem of effectively alleviating pollution and river sand shortage of resources of the building waste to environment.
The above, only the invention patent preferred embodiment, the scope of protection of the patent of the present invention is not limited to this, appoints
What those familiar with the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its sends out
Bright design is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (7)
1. the match ratio that a kind of discarded concrete prepares M20 dry powder and mortar, which is characterized in that the M20 dry powder and mortar include with
Lower component, recycled fine aggregate: cement: water: water-reducing agent: CaCl2In terms of mass parts: 1:(0.204~0.248): (0.165~
0.21): (0.0001~0.00015): (0.003~0.0031).
2. preparing the match ratio of M20 dry powder and mortar according to discarded concrete described in claim 1, which is characterized in that it is described again
The pure concrete debris that raw fine aggregate generates when being concrete removal, maximum particle diameter are not more than 4.75mm, grain composition
For continuous grading.
3. preparing the match ratio of M20 dry powder and mortar according to discarded concrete described in claim 1, which is characterized in that the water
Mud is 325 ordinary portland cements.
4. preparing the match ratio of M20 dry powder and mortar according to discarded concrete described in claim 1, which is characterized in that the water
For tap water.
5. preparing the match ratio of M20 dry powder and mortar according to discarded concrete described in claim 1, which is characterized in that described to subtract
Aqua is polycarboxylate water-reducer.
6. preparing the match ratio of M20 dry powder and mortar according to the described in any item discarded concretes of claim 1-5, feature exists
In the CaCl2For CaCl2It analyzes pure.
7. preparing the match ratio and its method of M20 dry powder and mortar according to discarded concrete described in claim 1, feature exists
In, comprising the following steps:
(1) building waste is selected；
(2) building waste of recycling is sorted, chooses recycled concrete aggregate；
(3) broken to recycled concrete aggregate, it is sieved with 4.75mm square hole screen, selects conduct of the partial size no more than 4.75mm again
Raw fine aggregate；
(4) cement, water-reducing agent, water, CaCl are matched according to the weight ratio of each component2Afterwards, after hand operated mixing 1~2 minute with 50% again
Raw fine aggregate is added in agitator for cement mortar together；
(5) blender is started, remaining 50% recycled fine aggregate is added after blender stirs 30 seconds and is obtained after stirring 2~4 minutes
To the dry powder and mortar.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910255557.2A CN109836101A (en) | 2019-04-01 | 2019-04-01 | A kind of discarded concrete prepares the match ratio and its method of M20 dry powder and mortar |
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| CN201910255557.2A CN109836101A (en) | 2019-04-01 | 2019-04-01 | A kind of discarded concrete prepares the match ratio and its method of M20 dry powder and mortar |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115124296A (en) * | 2021-03-24 | 2022-09-30 | 长沙理工大学 | Modified recycled brick aggregate mortar and preparation method thereof |
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| CN101857397A (en) * | 2009-04-10 | 2010-10-13 | 同济大学 | Method for preparing dry-mixed mortar from construction waste fine aggregate |
| CN105924053A (en) * | 2016-04-13 | 2016-09-07 | 苏州思创源博电子科技有限公司 | Preparation method of regenerated concrete |
| CN106007562A (en) * | 2016-05-19 | 2016-10-12 | 四川震强绿舍建材有限公司 | Dry-mixed mortar prepared from construction waste recycled aggregate and preparation method of dry-mixed mortar |
| RU2605110C1 (en) * | 2015-09-02 | 2016-12-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Петрозаводский государственный университет" | Wood-cement mixture for making building blocks |
| CN108046706A (en) * | 2017-12-25 | 2018-05-18 | 北京首钢资源综合利用科技开发公司 | A kind of external wall plastering dry mixed color mortar prepared using building waste |
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2019
- 2019-04-01 CN CN201910255557.2A patent/CN109836101A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857397A (en) * | 2009-04-10 | 2010-10-13 | 同济大学 | Method for preparing dry-mixed mortar from construction waste fine aggregate |
| RU2605110C1 (en) * | 2015-09-02 | 2016-12-20 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Петрозаводский государственный университет" | Wood-cement mixture for making building blocks |
| CN105924053A (en) * | 2016-04-13 | 2016-09-07 | 苏州思创源博电子科技有限公司 | Preparation method of regenerated concrete |
| CN106007562A (en) * | 2016-05-19 | 2016-10-12 | 四川震强绿舍建材有限公司 | Dry-mixed mortar prepared from construction waste recycled aggregate and preparation method of dry-mixed mortar |
| CN108046706A (en) * | 2017-12-25 | 2018-05-18 | 北京首钢资源综合利用科技开发公司 | A kind of external wall plastering dry mixed color mortar prepared using building waste |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115124296A (en) * | 2021-03-24 | 2022-09-30 | 长沙理工大学 | Modified recycled brick aggregate mortar and preparation method thereof |
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