CN109206034B - Method for blending fineness modulus of machine-made sand - Google Patents
Method for blending fineness modulus of machine-made sand Download PDFInfo
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- CN109206034B CN109206034B CN201810954223.XA CN201810954223A CN109206034B CN 109206034 B CN109206034 B CN 109206034B CN 201810954223 A CN201810954223 A CN 201810954223A CN 109206034 B CN109206034 B CN 109206034B
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B40/00—Processes, in general, for influencing or modifying the properties of mortars, concrete or artificial stone compositions, e.g. their setting or hardening ability
- C04B40/0028—Aspects relating to the mixing step of the mortar preparation
- C04B40/0039—Premixtures of ingredients
- C04B40/0042—Powdery mixtures
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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
Abstract
The invention relates to a blending method of fineness modulus of machine-made sand, which mixes the machine-made sand and blending materials, wherein the blending materials comprise fine sand with fineness modulus of 1.6-2.2, superfine sand with fineness modulus of 0.7-1.5, and silt or original-state fly ash with fineness modulus of 0.2-0.6, the mass percent of the fine sand is 28-32%, the mass percent of the superfine sand is 22-28%, and the mass percent of the silt or the original-state fly ash is 17-23%. The invention improves the compactness of the machine-made sand concrete, the workability, the cohesiveness and the water retention of the mixture of the machine-made sand concrete and the construction performance during pouring, and has low construction cost and high efficiency.
Description
Technical Field
The invention relates to the technical field of concrete construction, in particular to a method for blending fineness modulus of machine-made sand.
Background
In the current industrial and civil construction of China, the supply of building materials is more and more tense, and the reasons are that: the country and the place forbid the exploitation of river sand or river sand for the protection of rivers. In order to ensure the construction requirement, people begin to carry out secondary screening and washing on the crushed stone waste, namely the rock salt (powder), and screen out the crushed stone particles larger than 5.0mm to form machine-made (artificial) sand. The machine-made sand has the advantages of clear edge angles, rough surface, high strength and the like, but the fineness modulus of the machine-made sand is usually larger and is generally more than 3.6, and the machine-made sand belongs to the range of ultra-coarse sand. Because of the scarcity of natural sand, machine-made sand has found widespread use in plastic concrete mixes in the national construction market.
The slump of the conventional plastic concrete is generally 50mm-70mm, and the slump of the conventional plastic concrete is usually blocked and cannot be pulled (vibrated) flat by a vibrating rod in the application of pumping concrete with the slump of 180 +/-20 mm, the concrete at an outlet is accumulated into piles, cement paste is lost, the fluidity of the concrete disappears, and the phenomenon that the concrete is vibrated one by the vibrating rod even occurs during vibration. Although the strength of the machine-made sand concrete can meet the design requirement, the machine-made sand concrete can cause the problems of poor water retention and cohesiveness of concrete mixture, more gaps in a building structure, low impermeability and anti-carbonization performance, rough structure surface due to failure of light collection, more surface cellular pitted surfaces and the like.
In order to overcome the problems, the prior Chinese invention patent (CN 107651899A) discloses a grading method of machine-made sand for dry-mixed mortar and the prepared dry-mixed mortar: screening the machine-made sand part with the particle size of less than 4.75mm and the fineness modulus of 2.3-3.0 into three kinds of sand, namely coarse sand, medium sand and fine sand, wherein the fineness modulus of the coarse sand is 4.3-4.6, the fineness modulus of the medium sand is 3.7-4.0, and the fineness modulus of the fine sand is 1.4-1.7. Although the quality of the mortar is guaranteed, the time is consumed and the cost is greatly increased when screening is added once, so that the mortar is not beneficial to popularization and application.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the problems of high cost and low efficiency of machine-made sand preparation in the prior art, so as to provide a method for preparing the fineness modulus of the machine-made sand, which reduces the cost and improves the efficiency.
In order to solve the technical problems, the invention provides a method for blending fineness modulus of machine-made sand, which comprises the steps of mixing the machine-made sand and blending materials, wherein the blending materials comprise fine sand with fineness modulus of 1.6-2.2, superfine sand with fineness modulus of 0.7-1.5 and silt or original-state fly ash with fineness modulus of 0.2-0.6, the mass percent of the fine sand is 28-32%, the mass percent of the superfine sand is 22-28%, and the mass percent of the silt or original-state fly ash is 17-23%.
In one embodiment of the invention, fine sand with fineness modulus of 2, superfine sand with fineness modulus of 1, and silt or raw fly ash with fineness modulus of 0.4 are all mixed with machine-made sand, wherein the fine sand accounts for 30% by mass, the superfine sand accounts for 25% by mass, and the silt or raw fly ash accounts for 20% by mass.
In one embodiment of the invention, fine sand with fineness modulus of 1.6, superfine sand with fineness modulus of 0.7, silt with fineness modulus of 0.2 or original fly ash are mixed with machine-made sand, wherein the fine sand accounts for 28% by mass, the superfine sand accounts for 22% by mass, and the silt or original fly ash accounts for 17% by mass.
In one embodiment of the invention, fine sand with fineness modulus of 2.2, superfine sand with fineness modulus of 1.5, and silt or original fly ash with fineness modulus of 0.6 are mixed with machine-made sand, wherein the fine sand accounts for 32% by mass, the superfine sand accounts for 28% by mass, and the silt or original fly ash accounts for 23% by mass.
In one embodiment of the invention, fine sand with fineness modulus of 1.6, superfine sand with fineness modulus of 1.5, and silt or original fly ash with fineness modulus of 0.4 are mixed with machine-made sand, wherein the fine sand accounts for 29% by mass, the superfine sand accounts for 27% by mass, and the silt or original fly ash accounts for 21% by mass.
In one embodiment of the invention, the machine-made sand has a mud content of no greater than 2.5% and a stone dust content of no greater than 5.0%.
In one embodiment of the invention, the mud content of the blending material is not more than 3.0%.
In one embodiment of the invention, before the machine-made sand and the blending material are mixed, the machine-made sand and the blending material are respectively detected, and the fineness modulus of the machine-made sand and the blending material is measured.
In one embodiment of the invention, after the fineness modulus of the machine-made sand and the blending material is determined, mixing tests are carried out in a laboratory according to different proportions to determine the optimal blending proportion.
In one embodiment of the invention, after the optimal mixing proportion is determined, raw materials with different specifications are respectively stacked and respectively metered when the concrete is stirred, and then are sequentially put into a stirrer according to the mixing proportion to be stirred until the raw materials are sent to a concrete pouring site.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the blending method of the fineness modulus of the machine-made sand, when the machine-made sand concrete is normally used, the blending materials with certain particle sizes are doped to fill the pores in the machine-made sand, so that the cohesiveness, the water-retaining property and the overall fluidity of the concrete mixture can be effectively improved, the bleeding property of the mixture is greatly reduced, and the compactness of the concrete after pouring can be greatly improved; in addition, because extra investment is not needed, the material source is wide, special processing is not needed, and mixed materials can be prepared at any time by any concrete supply unit, so that the concrete mixing machine has the characteristics of high efficiency and the like.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which
FIG. 1 is a flow chart of a method for blending the mechanical sand fineness modulus of the present invention.
Detailed Description
The embodiment provides a method for blending fineness modulus of machine-made sand, which is used for stirring and pouring construction of directly blended machine-made sand concrete, and the machine-made sand and blending materials are mixed, wherein the blending materials comprise fine sand with fineness modulus of 1.6-2.2, superfine sand with fineness modulus of 0.7-1.5, and silt or undisturbed fly ash with fineness modulus of 0.2-0.6, the mass percent of the fine sand is 28-32%, the mass percent of the superfine sand is 22-28%, and the mass percent of the silt or undisturbed fly ash is 17-23%.
According to the blending method of the fineness modulus of the machine-made sand, the machine-made sand and the blending materials are mixed, the binding power of the sand, cement and coarse aggregate can be improved by adopting the machine-made sand, the bending resistance of concrete is superior to that of river sand concrete, the wear resistance of concrete is superior to that of river sand, in addition, the machine-made sand is adopted to mix the concrete, waste materials can be fully utilized, the environmental protection is facilitated, the waste of broken stone mining, the occupied area of the materials and the pollution to the environment are reduced, and the social benefit is obvious; the gradation of the machine-made sand can be adjusted through the blending materials to reduce the porosity of the machine-made sand, improve the compactness of the machine-made sand concrete and the workability, cohesiveness, water retention and construction performance during pouring, the blending materials comprise fine sand with a fineness modulus of 1.6-2.2, superfine sand with a fineness modulus of 0.7-1.5 and silt or undisturbed fly ash with a fineness modulus of 0.2-0.6, wherein the mass percent of the fine sand is 28-32%, the mass percent of the superfine sand is 22-28%, and the mass percent of the silt or undisturbed fly ash is 17-23%, so that the fineness modulus of the blended sand can be controlled to be 2.4-2.8 after blending, and the workability, cohesiveness and fluidity of the concrete mixture are ensured, so that the blending materials have the characteristics of good water retention effect, small bleeding amount and excellent construction performance, the durability and the appearance quality of the structure are the same as the appearance quality of the natural river sand concrete; in addition, the performance of the concrete construction after the machine-made sand is blended is basically consistent with that of the natural river sand concrete mixture, the aggregate accumulation phenomenon is avoided, the construction is not different from that of the natural river sand concrete mixture, and the construction performance is good; in addition, the quality of the concrete structure is obviously improved in the actual use process, and the concrete structure has obvious technical and quality effects.
The blending operation method of the fineness modulus of the machine-made sand is specifically described as follows:
the first mode is as follows: mixing fine sand with fineness modulus of 2, superfine sand with fineness modulus of 1, silt or original-state fly ash with fineness modulus of 0.4 and machine-made sand, wherein the mass percent of the fine sand is 30%, the mass percent of the superfine sand is 25%, and the mass percent of the silt or the original-state fly ash is 20%, so that the fineness modulus of the mixed sand after blending can be controlled to be 2.5.
The second mode is as follows: mixing fine sand with fineness modulus of 1.6, superfine sand with fineness modulus of 0.7, and silt or original-state fly ash with fineness modulus of 0.2 with machine-made sand, wherein the fine sand accounts for 28% by mass, the superfine sand accounts for 22% by mass, and the silt or original-state fly ash accounts for 17% by mass, so that the fineness modulus of the mixed sand after blending can be controlled to be 2.7.
The third mode is as follows: mixing fine sand with fineness modulus of 2.2, superfine sand with fineness modulus of 1.5, and silt or original-state fly ash with fineness modulus of 0.6 with machine-made sand, wherein the mass percent of the fine sand is 32%, the mass percent of the superfine sand is 28%, and the mass percent of the silt or the original-state fly ash is 23%, so that the fineness modulus of the mixed sand after blending can be controlled to be 2.6.
The fourth mode is that: mixing fine sand with fineness modulus of 1.6, superfine sand with fineness modulus of 1.5, silt or original-state fly ash with fineness modulus of 0.4 and machine-made sand, wherein the mass percent of the fine sand is 29%, the mass percent of the superfine sand is 27%, and the mass percent of the silt or the original-state fly ash is 21%, so that the fineness modulus of the mixed sand after blending can be controlled to be 2.4.
The fifth mode is as follows: mixing fine sand with fineness modulus of 1.8, superfine sand with fineness modulus of 0.9, and silt or original-state fly ash with fineness modulus of 0.3 with machine-made sand, wherein the mass percent of the fine sand is 29%, the mass percent of the superfine sand is 24%, and the mass percent of the silt or the original-state fly ash is 18%, so that the fineness modulus of the mixed sand after blending can be controlled to be 2.4.
The sixth mode: mixing fine sand with fineness modulus of 1.7, superfine sand with fineness modulus of 1.4, and silt or original-state fly ash with fineness modulus of 0.5 with machine-made sand, wherein the fine sand accounts for 31% by mass, the superfine sand accounts for 23% by mass, and the silt or original-state fly ash accounts for 22% by mass, so that the fineness modulus of the mixed sand after blending can be controlled to be 2.6.
The seventh mode: mixing fine sand with fineness modulus of 1.9, superfine sand with fineness modulus of 0.8, and silt or original-state fly ash with fineness modulus of 0.5 with machine-made sand, wherein the fine sand accounts for 28% by mass, the superfine sand accounts for 27% by mass, and the silt or original-state fly ash accounts for 23% by mass, so that the fineness modulus of the mixed sand after blending can be controlled to be 2.7.
The eighth mode: mixing fine sand with fineness modulus of 2.1, superfine sand with fineness modulus of 1.4, and silt or original-state fly ash with fineness modulus of 0.6 with machine-made sand, wherein the fine sand accounts for 32% by mass, the superfine sand accounts for 26% by mass, and the silt or original-state fly ash accounts for 20% by mass, so that the fineness modulus of the mixed sand after blending can be controlled to be 2.8.
The above mentioned are only examples of eight ways of blending the fineness modulus of the machine-made sand, but are not limited to the above eight ways, and when blending, if the fineness modulus of the fine sand is 1.6-2.2, the fineness modulus of the ultrafine sand is 0.7-1.5, the fineness modulus of the silt or raw fly ash is 0.2-0.6, the mass percentage of the fine sand is 28-32%, the mass percentage of the ultrafine sand is 22-28%, and the mass percentage of the silt or raw fly ash is 17-23%, the fineness modulus of the blended mixed sand can be controlled to be 2.4-2.8.
As shown in fig. 1, in this embodiment, the method for blending concrete with machine-made sand includes: before the machine-made sand and the blending material are mixed, the machine-made sand and the blending material are respectively detected, and the fineness modulus of the machine-made sand and the fineness modulus of the blending material are measured, so that reference is made during blending; after the fineness modulus of the machine-made sand and the blending material is determined, mixing tests are carried out in a laboratory according to different proportions, and generally, mixing tests are carried out according to three different proportions during mixing and blending, so that the optimal mixing proportion can be determined according to the detection result; after the optimal mixing proportion is determined, the raw materials with different specifications are respectively stacked and respectively metered when the concrete is stirred, and then the raw materials are put into a stirrer in sequence according to the mixing proportion to be stirred until the raw materials are sent to a concrete pouring site. . The concrete construction after the machine-made sand is blended is basically consistent with the performance of the natural river sand concrete mixture, the aggregate accumulation phenomenon is avoided, the construction is not different from the construction of the natural river sand concrete mixture, and the construction performance is good. In addition, when the mixed preparation machine is adopted for pouring the sand concrete, the concrete construction requirements and the structural quality requirements can be ensured according to normal concrete pouring, scraping, plastering and maintaining.
In this embodiment, the requirements for the machine-made sand and the blending material are as follows: the mud content of the machine-made sand is not more than 2.5 percent, and the stone powder content is not more than 5.0 percent. The mud content of the blending material is not more than 3.0%.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A method for blending fineness modulus of machine-made sand is characterized by comprising the following steps: mixing machine-made sand and blending materials, wherein the blending materials comprise fine sand with a fineness modulus of 1.6-2.2, superfine sand with a fineness modulus of 0.7-1.5 and silt or original-state fly ash with a fineness modulus of 0.2-0.6, the fine sand accounts for 28-32% by mass, the superfine sand accounts for 22-28% by mass, and the silt or original-state fly ash accounts for 17-23% by mass.
2. The method for blending the modulus of fineness of machine-made sand according to claim 1, wherein the method comprises the following steps: mixing fine sand with fineness modulus of 2, superfine sand with fineness modulus of 1, silt or original-state fly ash with fineness modulus of 0.4 and machine-made sand, wherein the mass percent of the fine sand is 30%, the mass percent of the superfine sand is 25%, and the mass percent of the silt or the original-state fly ash is 20%.
3. The method for blending the modulus of fineness of machine-made sand according to claim 1, wherein the method comprises the following steps: mixing fine sand with fineness modulus of 1.6, superfine sand with fineness modulus of 0.7, and silt or original-state fly ash with fineness modulus of 0.2 with machine-made sand, wherein the fine sand accounts for 28% by mass, the superfine sand accounts for 22% by mass, and the silt or original-state fly ash accounts for 17% by mass.
4. The method for blending the modulus of fineness of machine-made sand according to claim 1, wherein the method comprises the following steps: mixing fine sand with fineness modulus of 2.2, superfine sand with fineness modulus of 1.5, and silt or original-state fly ash with fineness modulus of 0.6 with machine-made sand, wherein the fine sand accounts for 32% by mass, the superfine sand accounts for 28% by mass, and the silt or original-state fly ash accounts for 23% by mass.
5. The method for blending the modulus of fineness of machine-made sand according to claim 1, wherein the method comprises the following steps: mixing fine sand with fineness modulus of 1.6, superfine sand with fineness modulus of 1.5, and silt or original-state fly ash with fineness modulus of 0.4 with machine-made sand, wherein the fine sand accounts for 29% by mass, the superfine sand accounts for 27% by mass, and the silt or original-state fly ash accounts for 21% by mass.
6. The method for blending the modulus of fineness of machine-made sand according to claim 1, wherein the method comprises the following steps: the mud content of the machine-made sand is not more than 2.5 percent, and the stone powder content is not more than 5.0 percent.
7. The method for blending the modulus of fineness of machine-made sand according to claim 1, wherein the method comprises the following steps: the mud content of the blending material is not more than 3.0%.
8. The method for blending the modulus of fineness of machine-made sand according to claim 1, wherein the method comprises the following steps: before the machine-made sand and the blending material are mixed, the machine-made sand and the blending material are respectively detected, and the fineness modulus of the machine-made sand and the blending material is measured.
9. The method for blending the modulus of fineness of machine-made sand according to claim 8, wherein: after the fineness modulus of the machine-made sand and the blending material is determined, mixing tests are carried out in a laboratory according to different proportions, and the optimal mixing proportion is determined.
10. The method for blending the modulus of fineness of machine-made sand according to claim 9, wherein: after the optimal mixing proportion is determined, the raw materials with different specifications are respectively stacked and respectively metered when the concrete is stirred, and then the raw materials are put into a stirrer in sequence according to the mixing proportion to be stirred until the raw materials are sent to a concrete pouring site.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003137626A (en) * | 2001-11-05 | 2003-05-14 | Buiaaku Corporation Kk | Artificial sand for cement and concrete using the sand |
| CN101708968A (en) * | 2009-09-24 | 2010-05-19 | 重庆第三建设有限责任公司 | Preparation method of machine-made sand fine aggregate |
| CN102531435A (en) * | 2012-02-27 | 2012-07-04 | 无锡强世混凝土有限公司 | Super-fine sand blended fine aggregate for pump concrete |
| CN103113033A (en) * | 2013-02-05 | 2013-05-22 | 广东省长大公路工程有限公司 | Method for improving gradation of machined sand |
| CN103304171A (en) * | 2013-06-13 | 2013-09-18 | 南京工业大学 | Preparation method of machine-made sand capable of replacing natural sand |
| CN104446257A (en) * | 2014-12-07 | 2015-03-25 | 重庆建工住宅建设有限公司 | Mixed sand self-compacting concrete and pouring construction method thereof |
| CN107651899A (en) * | 2017-10-27 | 2018-02-02 | 章丘华明水泥新型建材有限公司 | A kind of grading method of dry-mixed mortar Machine-made Sand and the dry-mixed mortar of preparation |
-
2018
- 2018-08-21 CN CN201810954223.XA patent/CN109206034B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003137626A (en) * | 2001-11-05 | 2003-05-14 | Buiaaku Corporation Kk | Artificial sand for cement and concrete using the sand |
| CN101708968A (en) * | 2009-09-24 | 2010-05-19 | 重庆第三建设有限责任公司 | Preparation method of machine-made sand fine aggregate |
| CN102531435A (en) * | 2012-02-27 | 2012-07-04 | 无锡强世混凝土有限公司 | Super-fine sand blended fine aggregate for pump concrete |
| CN103113033A (en) * | 2013-02-05 | 2013-05-22 | 广东省长大公路工程有限公司 | Method for improving gradation of machined sand |
| CN103304171A (en) * | 2013-06-13 | 2013-09-18 | 南京工业大学 | Preparation method of machine-made sand capable of replacing natural sand |
| CN104446257A (en) * | 2014-12-07 | 2015-03-25 | 重庆建工住宅建设有限公司 | Mixed sand self-compacting concrete and pouring construction method thereof |
| CN107651899A (en) * | 2017-10-27 | 2018-02-02 | 章丘华明水泥新型建材有限公司 | A kind of grading method of dry-mixed mortar Machine-made Sand and the dry-mixed mortar of preparation |
Non-Patent Citations (3)
| Title |
|---|
| 天然细砂在预拌混凝土中的应用;翟向丽等;《21世纪建筑材料》;20090425(第02期);第60页"2使用机制砂存在的问题及对策"、"3原理和依据" * |
| 机制砂颗粒特性对胶砂综合性能的影响研究;魏艺博等;《公路交通科技(应用技术版)》;20180715(第07期);第137-138页 * |
| 细集料掺配级配在混凝土中的应用研究;郝景润;《山西建筑》;20151231;第34卷(第34期);第123页"0引言"和"2细集料的级配分析研究"、第124页"4结论" * |
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