CN103145382B - Dry-mixed mortar for preparing reclaimed sand and preparation method of dry-mixed mortar - Google Patents
Dry-mixed mortar for preparing reclaimed sand and preparation method of dry-mixed mortar Download PDFInfo
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- CN103145382B CN103145382B CN201310082740.XA CN201310082740A CN103145382B CN 103145382 B CN103145382 B CN 103145382B CN 201310082740 A CN201310082740 A CN 201310082740A CN 103145382 B CN103145382 B CN 103145382B
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Abstract
The invention is applicable to the field of building materials, and provides a dry-mixed mortar for preparing reclaimed sand and a preparation method of the dry-mixed mortar. The dry-mixed mortar comprises the following raw materials in percentage by weight: 20 to 50% of cement, 20 to 50% of reclaimed sand, 10 to 25% of natural sand, 0 to 20% of coal ash, 2 to 8% of waste rubber powder, 1 to 3% of polymer modifier, 1 to 3% of admixture, and 1 to 3% of anionic surfactant. According to the dry-mixed mortar for preparing the reclaimed sand, the reclaimed sand and the waste rubber powder which are the recyclable raw materials are utilized, so that the cost of the raw materials of the mortar is greatly decreased, lots of natural resources are saved at the same time, the prepared mortar is proper in strength, high in toughness and excellent in anti-penetrability performance, and thus the integrated and comprehensive utilization of the construction waste resources can be realized, the environment can be protected, and the development of the mortar is prompted toward the functional optimization.
Description
Technical field
The invention belongs to building material field, relate in particular to a kind of dry-mixed mortar of preparing with reclaimed sand and preparation method thereof.
Background technology
The recycle of brick mixed building rubbish is the direction that people make great efforts always, but prior art is mostly extensive using to the mode of its utilization, does not make full use of the potential value of building waste, and its product performance are also not satisfactory.Preparing superior performance, multi-functional construction refuse regenerated product, meet the different demands of different engineerings, is the road of the competition of building waste product.
Flooring terrace mortar and wall plastering mortar are the main applications of building mortar.Traditional building mortar need to expend a large amount of natural sand resources, and the performance of mortar is single, impervious etc., and function is poor, does not even have, and can not meet the following development trend to building trade high request.
Summary of the invention
The object of the invention is to: a kind of dry-mixed mortar of preparing with reclaimed sand is provided, is intended to solve existing mortar and need to expends the problem of a large amount of natural sand resources.
The object of the present invention is achieved like this:
A kind of dry-mixed mortar of preparing with reclaimed sand, the raw material adopting and the weight percent of every kind of raw material are cement 20～50%, reclaimed sand 20～50%, natural sand 10～25%, flyash 0～20%, waste rubber fine powder 2～8%, polymer modifiers 1～3%, admixture 1～3%, anion surfactant 1～3%.
The weight percent of each raw material is cement 30%, reclaimed sand 40%, natural sand 20%, waste rubber fine powder 5%, polymer modifiers 1%, admixture 2%, anion surfactant 2%.
The weight percent of each raw material is cement 25%, reclaimed sand 40%, natural sand 25%, waste rubber fine powder 3%, polymer modifiers 2%, admixture 2%, anion surfactant 2%.
Described reclaimed sand is the mixed reclaimed sand of the brick of particle diameter≤5mm that building waste is obtained through screening after fragmentation again; Described admixture is high performance water reducing agent of polyocarboxy acid.
Described waste rubber fine powder is to adopt the FRP thin rubber powder of particle diameter below 0.3mm.
Another object of the present invention is to: a kind of preparation method of the dry-mixed mortar of preparing with reclaimed sand is provided, and described method comprises the steps:
Screen out the bulk impurity in building waste;
The building waste sorting is washed, and dried or dry;
Bulk building waste is slightly broken for the first time;
Building waste after once slightly breaking is carried out to deironing, removal of impurities, and screen out the micro mist after fragmentation;
Broken in carrying out for the second time to building waste;
Building waste after broken in secondary is carried out to removal of impurities, washing again, and dry or dry;
Building waste is carried out to thin broken for the third time;
Reclaimed sand after three thin brokens is dried;
According to the proportioning raw materials of different varieties mortar, cement, reclaimed sand, natural sand, waste rubber fine powder, polymer modifiers, admixture, anion surfactant is batching respectively;
The various raw material stirring that measure are mixed and are prepared into dry-mixed mortar.
Described thick broken requirement construction waste crushing to the particle diameter requirement that meets broken disintegrating apparatus in lower one for the first time.
Described for the second time in broken requirement construction waste crushing to the particle diameter requirement that meets lower one thin broken disintegrating apparatus.
Described thin broken for the third time, require thin broken after maximum particle diameter be less than or equal to 5mm.
Outstanding advantages of the present invention is: the present invention is by adopting reclaimed sand and these raw materials that are recycled of waste Crumb rubber; greatly reduce the raw materials cost of mortar; a large amount of natural resource have been saved simultaneously; and the mortar strength of preparation is suitable, toughness is good, impervious function is superior; thereby realize the resource integrated comprehensive utilization of building waste; protection of the environment, impels the future development of mortar towards superiorization of function.
Accompanying drawing explanation
Fig. 1 is the preparation method's of the dry-mixed mortar of preparing with reclaimed sand that provides of the embodiment of the present invention schema.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The raw material that the dry-mixed mortar of preparing with reclaimed sand provided by the invention adopts and the weight percent of every kind of raw material are as follows: cement 20～50%, reclaimed sand 20～50%, natural sand 10～25%, flyash 0～20%, waste rubber fine powder 2～8%, polymer modifiers 1～3%, admixture 1～3%, anion surfactant 1～3%.
Described reclaimed sand is the mixed reclaimed sand of the brick of particle diameter≤5mm that building waste is obtained through screening after fragmentation again.Described admixture is high performance water reducing agent of polyocarboxy acid.
Described polymer modifiers is that employing import building specialty polymer latex is main raw material, be equipped with the refining water-proof emulsion forming of multiple auxiliary agent, it is introduced in mortar (or concrete) and can improve the cohesive force of sand-cement slurry, and there is the performances such as good impermeability, splitting resistance, shock resistance, freeze-thaw resistance.
Described waste rubber fine powder is to adopt particle diameter below 0.3mm, the i.e. thin rubber powder of FRP more than 47 orders, while preparing mortar, in the time that the volume of fine powder is less than 10%, sand-cement slurry early anti pressured intension is not almost affected, when identical volume, rubber powder is thinner, and mortar strength is higher, use rubber powder can make the physicals of mortar obviously improve, the mortar that has therefore mixed waste rubber fine powder is applicable to cracking resistance, antidetonation, wear-resistant and antifatigue etc. to have the architectural environment of particular requirement.
Described anion surfactant is a kind of electronegative tensio-active agent of part that plays surface-active action in water after ionization, uses this promoting agent to play and improves mortar viscosity and the effect of foaming in right amount.
In one embodiment of the invention, can be used as the weight percent of raw material of the dry-mixed mortar of ground motar as follows: cement 30%, reclaimed sand 40%, natural sand 20%, waste rubber fine powder 5%, polymer modifiers 1%, admixture 2%, anion surfactant 2%.
The performance test results of the dry-mixed mortar that the embodiment of the present invention is provided is as shown in table 1:
Table 1
| Test item | Detected result | Current standards requirement |
| Unit surface abrasion loss (kg/m2) | ≤3.0 | ≤5.0 |
| Impervious pressure (MPa) | ≥1.0 | ≥0.50 |
| Water-retentivity (%) | ≥92 | ≥88 |
| Cohesive strength (Mpa) | ≥0.5 | ≥0.25 |
| 28 ultimate compression strength (Mpa) | ≥10 | ≥2.00 |
| Degree of mobilization (mm) | ≥120 | ≥90 |
Wherein, wear resistance is undertaken by JC-T421 " test method of cement mortar wear resistance "; Impermeability, water-retentivity, cohesive strength, 28 ultimate compression strength, degree of mobilization carry out with reference to JCJ/T70-2009 " building mortar basic performance tests method standard ".
The dry-mixed mortar that the embodiment of the present invention provides is mainly used in room, the reception room of house, and the terrace of public and civil building etc. is plastered.
In another embodiment of the present invention, can be used as the weight percent of raw material of the dry-mixed mortar of heat insulating and anti-cracking plastering mortar as follows: cement 25%, reclaimed sand 40%, natural sand 25%, waste rubber fine powder 3%, polymer modifiers 2%, admixture 2%, anion surfactant 2%.
The performance test results of the dry-mixed mortar that the embodiment of the present invention is provided is as shown in table 2:
Table 2
Wherein, former intensity is the 7d intensity of normal temperature maintenance, and water-fast intensity is the 7d of normal temperature maintenance, the 48 hours intensity of soaking; Freeze-thawing resistant refers to submergence 8h in (20 ± 3) ℃ water, (20 ± 3) ℃ freezing 24 hours, the so intensity after totally 10 times; Intensity when ultimate compression strength/folding strength refers to the 28 days length of time.
The dry-mixed mortar that the embodiment of the present invention provides is mainly applicable to newly-built, the transformation of China's severe cold, cold, Xia Redong cold-peace hot summer and warm winter region, public building and the covil construction of enlarging.
By the detection to indices, visible mortar provided by the invention can meet its separately purposes and also effect better.
Fig. 1 shows the preparation method's of the dry-mixed mortar of preparing with reclaimed sand that the embodiment of the present invention provides flow process, and details are as follows:
In step S101, first screen out the bulk impurity in building waste, by machinery or manual type, the impurity such as the bulk reinforcing bar in building waste, bulk wood, plastics are sorted out.
In step S103, utilize the mode of washing equipment or directly water flushing to wash the building waste having sorted, remove the impurity such as building waste surface earth.
In step S105, after flushing, building waste dried or dry.
In step S107, bulk building waste slightly to be broken for the first time, requirement is by construction waste crushing to the particle diameter requirement that meets broken disintegrating apparatus in lower one, and this step can adopt jaw crusher to realize.
In step S109, once, after thick breaking, utilize magnetic separator or manual type that iron is removed, utilize machinery or manual type to remove other impurity simultaneously, recycling sifted is except the micro mist after fragmentation.
In step S111, broken in carrying out for the second time to building waste, require construction waste crushing to the particle diameter requirement that meets lower one thin broken disintegrating apparatus, this step can adopt the realization of horizontal axis hammer mill.
In step S113, after breaking in secondary, utilize machinery or manual type to remove impurity, then wash.
In step S115, building waste is dried or dry.
In step S117, building waste is carried out to thin broken for the third time, require thin broken after maximum particle diameter be less than or equal to 5mm, obtain reclaimed sand, this step can adopt the disintegrating apparatus such as sand machine processed to realize.
In step S119, the reclaimed sand after three thin brokens to be dried, the reclaimed sand after oven dry can first be transported to feed bin and be in store for.
In step S121, need to prepare mortar time, according to the proportioning raw materials of different varieties mortar, cement, reclaimed sand, natural sand, waste rubber fine powder, polymer modifiers, admixture, anion surfactant is batching respectively.
In step S123, utilize stirrer that the various raw material stirring that measure are mixed and are prepared into dry-mixed mortar.
Dry-mixed mortar provided by the invention has adopted reclaimed sand and these raw materials that are recycled of waste Crumb rubber; greatly reduce the raw materials cost of mortar; a large amount of natural resource have been saved simultaneously; and the mortar strength of preparation is suitable, toughness is good, impervious function is superior; thereby realize the resource integrated comprehensive utilization of building waste; protection of the environment, impels the future development of mortar towards superiorization of function.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (1)
1. a preparation method for the dry-mixed mortar of preparing with reclaimed sand, is characterized in that, described method comprises the steps:
Screen out the bulk impurity in building waste;
The building waste sorting is washed, and dried or dry;
Bulk building waste is slightly broken for the first time, by construction waste crushing to meet lower together in the particle diameter requirement of broken disintegrating apparatus;
Building waste after once slightly breaking is carried out to deironing, removal of impurities, and screen out the micro mist after fragmentation;
Broken in carrying out for the second time to building waste, by construction waste crushing to the particle diameter requirement that meets lower one thin broken disintegrating apparatus;
Building waste after broken in secondary is carried out to removal of impurities, washing again, and dry or dry;
Building waste is carried out to thin broken for the third time, and after thin broken, maximum particle diameter is less than or equal to 5mm;
Reclaimed sand after three thin brokens is dried;
According to the proportioning raw materials of different varieties mortar, cement, reclaimed sand, natural sand, waste rubber fine powder, polymer modifiers, admixture, anion surfactant is batching respectively;
The various raw material stirring that measure are mixed and are prepared into dry-mixed mortar;
The weight percent of the each raw material of described dry-mixed mortar is cement 30%, reclaimed sand 40%, natural sand 20%, waste rubber fine powder 5%, polymer modifiers 1%, admixture 2%, anion surfactant 2%, or be cement 25%, reclaimed sand 40%, natural sand 25%, waste rubber fine powder 3%, polymer modifiers 2%, admixture 2%, anion surfactant 2%;
Described reclaimed sand is the mixed reclaimed sand of the brick of particle diameter≤5mm that building waste is obtained through screening after fragmentation again; Described admixture is high performance water reducing agent of polyocarboxy acid;
Described waste rubber fine powder is to adopt the FRP thin rubber powder of particle diameter below 0.3mm.
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105837134B (en) * | 2016-05-26 | 2018-04-06 | 甘肃德龙生态建材有限公司 | A kind of ecological dry-mixed mortar |
| CN110054426A (en) * | 2018-01-17 | 2019-07-26 | 兴磊资源回收股份有限公司 | Brick sand recovery method and its application structure |
| CN110090712B (en) * | 2018-01-31 | 2021-03-19 | 咸阳东大洋混凝土有限公司 | Sorting device for treating construction waste and construction waste recycling system and method |
| CN110451888A (en) * | 2019-08-26 | 2019-11-15 | 梁剑 | A kind of water proof anti-seepage cement mortar and preparation method thereof |
| CN117105611B (en) * | 2023-10-24 | 2024-01-30 | 北京建筑大学 | Crack-resistant base material of rubber powder modified high-brick-concrete construction waste and preparation method thereof |
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Denomination of invention: Dry-mixed mortar for preparing reclaimed sand and preparation method of dry-mixed mortar Effective date of registration: 20140718 Granted publication date: 20140702 Pledgee: China Cinda Asset Management Corp Beijing branch Pledgor: BEIJING CHINA ACM CONCRETE GROUP CO.,LTD. Registration number: 2014990000586 |
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Correction item: Patentee|Address Correct: ENN ECO BUILDING MATERIALS CO., LTD.|100076, No. 34, South District, old town Industrial Park, Beijing, Daxing District False: BEIJING YUANTAIDA ENVIRONMENTAL PROTECTION BUILDING MATERIAL TECHNOLOGY CO., LTD.|102200 Beijing City, Changping District Yang Fang Zhen Shi Jia Qiao Cun four history Road No. 603 Number: 53 Volume: 30 |
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