CN103113033B - Method for improving gradation of machined sand - Google Patents
Method for improving gradation of machined sand Download PDFInfo
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- CN103113033B CN103113033B CN201310045273.3A CN201310045273A CN103113033B CN 103113033 B CN103113033 B CN 103113033B CN 201310045273 A CN201310045273 A CN 201310045273A CN 103113033 B CN103113033 B CN 103113033B
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Abstract
The invention discloses a method for improving gradation of machined sand, which adopts any one or two processes: gradation feeding: doping stone dust with the particle size of 0-4.75mm into gravel with the particle size of 9.5-19mm or 19-37.5mm, and adding into a sand maker to make sand; two-stage doping: mixing and doping machined sand with the particle size of 0-4.75mm and machined sand with the particle size of 0-2.36mm; and industrial residue doping: doping industrial residue into machined sand with the particle size of 0-4.75mm. By adjusting the feeding gradation (adding part of stone dust 15-35%), the throughput rate of the fine particles in the finished product machined sand of the 1.18mm sieve is increased by 3-15%; by mixing a small amount of fine machined sand with the maximum particle size of 2.36mm with common machined sand, the fineness modulus of the machined sand can be adjusted, and the machining gradation curve can be optimized; and the industrial residue is doped into the machined sand at a certain ratio to enhance the fine particle content in the machined sand, thereby achieving the goal of improving the gradation of machined sand.
Description
Technical field
The present invention relates to a kind of method of Machine-made Sand improved gradation.
Background technology
Within 2011, China uses cement 20.6 hundred million tons, and build various concrete works about 5,000,000,000 side, only cement concrete just needs fine aggregate---about 3,000,000,000 tons, sand.Sand for Concrete is divided into natural sand and artificial sand two class, and natural sand is by weathering, and the particle diameter that potamic transport, sorting and accumulation are formed is less than the rock particles of 4.75mm, is divided into river sand, extra large sand, mountain sand by its origin cause of formation, is a kind of Nonrenewable resources.Machine-made Sand is the rock particles being less than 4.75mm with the particle diameter of rock through making except soil exploitation, Mechanical Crushing, screening.Machine-made Sand disproportionately graded, normally many centres, two are few, namely coarse particles (more than 2.36mm) and fine particle (below 0.15mm) more, but intermediate particle (especially between 1.18 ~ 0.3mm) is less, the concrete of preparation is easy to bleeding of emanating, also there is disadvantageous effect to concrete strength, also affect concrete finish effect.Improve the workability that the pairing of Machine-made Sand level improves machine-made sand concrete, improve machine-made sand concrete inner quality and visual appearance, applying of engagement each other sand has great importance.
Current transport development industry Machine-made Sand is multi-point and wide-ranging, and equipment capacity is little, and the Machine-made Sand quality of production is very different.Single graded broken stone of usual employing 19-37.5mm drops into hammer, reaction type or impact crusher and carries out aggregate reclaiming, in employing dry type or wet dust removal.In the Machine-made Sand produced, powder content is high, but lacks intermediate particle.This patent utilizes technology, improves the grating of Machine-made Sand, to fill up in Machine-made Sand between 1.18 ~ 0.3mm) content of particle, thus improve the overall grating of Machine-made Sand, reach and improve the workability of machine-made sand concrete and the object of other performances.Be suitable for large-scale Zhi Sha enterprise and middle-size and small-size Machine-made Sand production line carries out Machine-made Sand production.
Summary of the invention
The object of this invention is to provide a kind of method of Machine-made Sand improved gradation.
The technical solution used in the present invention is:
A kind of method of Machine-made Sand improved gradation, adopt one or any two kinds in following three kinds of methods: grating feeds intake: comprise step: be mix the aggregate chips that particle diameter is 0-4.75mm in the rubble of 9.5-19mm or 19-37.5mm at particle diameter, then drop into sand processed in sand machine processed; Two-stage is mixed and is joined: comprise step: the Machine-made Sand mixing of to be the Machine-made Sand of 0-4.75mm and particle diameter by particle diameter be 0-2.36mm is mixed and joined; Industrial residue is mixed and is joined: be mix industrial residue in the Machine-made Sand of 0-4.75mm at particle diameter.
During described grating feeds intake, particle diameter is after mixing of the aggregate chips of 0-4.75mm, and the mass percent in its mixture formed at rubble and aggregate chips is 15-35%.
During two-stage is mixed and joined, the mass ratio of particle diameter to be the Machine-made Sand of 0-4.75mm and particle diameter the be Machine-made Sand of 0-2.36mm is 80:20-50:50.
Described industrial residue comprises metallurgical slag, CHARACTERISTICS OF TAILINGS SAND, molding sand.
After described industrial residue mixes, the mass percent in the mixture that its Machine-made Sand at 0-4.75mm and industrial residue are formed is 5-30%.
The sieve aperture percent of pass of the 2.36mm of described industrial residue is more than 85%.
The invention has the beneficial effects as follows: the present invention 1) namely increase part aggregate chips 15-35% by the adjustment of the grating that feeds intake, make the sieve of the fine particle content 1.18mm in finished product Machine-made Sand percent of pass have the increase of 3-15%; 2) by produce a small amount of maximum particle diameter be the Machine-made Sand in small, broken bits of 2.36mm and common Machine-made Sand carry out mixing can the fineness modulus of Regulation mechanism sand and the graduation curve of Optimization Mechanism; 3) the granular industrial residue of joining and having good soundness is mixed in utilization: as slag tailing (slag after iron is selected in fragmentation), mine tailing etc., mix Machine-made Sand with certain proportion, improves fine grain content in Machine-made Sand, thus reaches the object of improvement Machine-made Sand grating.
Embodiment
Below in conjunction with specific embodiment, the present invention is described further:
embodiment 1:
A method for Machine-made Sand improved gradation, comprises the following steps:
1) at particle diameter be 19-37.5mm rubble in mix the aggregate chips that particle diameter is 0-4.75mm, the mass percent of the aggregate chips being 0-4.75mm to make particle diameter in mixture (i.e. rubble and aggregate chips formed mixture) is for 20%;
2) drop into sand processed in sand machine processed again, obtain finished product Machine-made Sand through washed-out sand again.
The finished product Machine-made Sand (hereinafter referred to as Machine-made Sand after improvement) adopting above-mentioned steps obtained, be that the rubble of 19-37.5mm drops into sand Machine-made Sand processed with adopting particle diameter completely, the finished product Machine-made Sand (before hereinafter referred to as improvement Machine-made Sand) obtained through washed-out sand is again compared, in obtained finished product Machine-made Sand, 1.18mm tails over and is reduced to 44.1% from 49.8%, fine particle content significantly increases, and Machine-made Sand grating and workability of concrete significantly improve.
Machine-made Sand before Machine-made Sand after improvement and improvement is used for the concrete Formulation Ingredients of C50 and performance contrasts, the results are shown in Table 1 and table 2, to comprise after improvement the concrete formula of C50 of Machine-made Sand and performance in table 1, comprise the concrete formula of C50 of Machine-made Sand before improvement and performance in table 2.
embodiment 2:
A method for Machine-made Sand improved gradation, comprises the following steps:
1) at particle diameter be 19-37.5mm rubble in mix the aggregate chips that particle diameter is 0-4.75mm, the mass percent of the aggregate chips being 0-4.75mm to make particle diameter in mixture (i.e. rubble and aggregate chips formed mixture) is for 35%;
2) drop into sand processed in sand machine processed again, obtain finished product Machine-made Sand through washed-out sand again.
The finished product Machine-made Sand (hereinafter referred to as Machine-made Sand after improvement) adopting above-mentioned steps obtained, be that the rubble of 19-37.5mm drops into sand Machine-made Sand processed with adopting particle diameter completely, the finished product Machine-made Sand (before hereinafter referred to as improvement Machine-made Sand) obtained through washed-out sand is again compared, in obtained finished product Machine-made Sand, 1.18mm tails over and is reduced to 42.5% from 49.8%, fine particle content significantly increases, and Machine-made Sand grating and workability of concrete significantly improve.
Machine-made Sand before Machine-made Sand after improvement and improvement is used for the concrete Formulation Ingredients of C50 and performance contrasts, the results are shown in Table 3 and table 4, to comprise after improvement the concrete formula of C50 of Machine-made Sand and performance in table 3, comprise the concrete formula of C50 of Machine-made Sand before improvement and performance in table 4.
embodiment 3:
A method for Machine-made Sand improved gradation, comprises the following steps:
1) at particle diameter be 19-37.5mm rubble in mix the aggregate chips that particle diameter is 0-4.75mm, the mass percent of the aggregate chips being 0-4.75mm to make particle diameter in mixture (i.e. rubble and aggregate chips formed mixture) is for 15%;
2) drop into sand processed in sand machine processed again, obtain finished product Machine-made Sand through washed-out sand again.
The finished product Machine-made Sand (hereinafter referred to as Machine-made Sand after improvement) adopting above-mentioned steps obtained, be that the rubble of 19-37.5mm drops into sand Machine-made Sand processed with adopting particle diameter completely, the finished product Machine-made Sand (before hereinafter referred to as improvement Machine-made Sand) obtained through washed-out sand is again compared, in obtained finished product Machine-made Sand, 1.18mm tails over and is reduced to 46.4% from 49.8%, fine particle content significantly increases, and Machine-made Sand grating and workability of concrete significantly improve.
Machine-made Sand before Machine-made Sand after improvement and improvement is used for the concrete Formulation Ingredients of C50 and performance contrasts, the results are shown in Table 5 and table 6, to comprise after improvement the concrete formula of C50 of Machine-made Sand and performance in table 5, comprise the concrete formula of C50 of Machine-made Sand before improvement and performance in table 6.
embodiment 4:
A method for Machine-made Sand improved gradation, comprises the following steps:
1) Machine-made Sand that particle diameter is 0-2.36mm is made after 0-4.75mm aggregate chips being dropped into sand machine processed;
2) Machine-made Sand of the 0-2.36mm upper step obtained, mix with both Machine-made Sands that particle diameter is produced for 19-37.5mm rubble, wherein, the Machine-made Sand mass percent in the mixture of 0-2.36mm is 20%, then through washed-out sand, obtains finished product Machine-made Sand.
The finished product Machine-made Sand (hereinafter referred to as Machine-made Sand after improvement) adopting above-mentioned steps obtained, be that the rubble of 19-37.5mm drops into sand Machine-made Sand processed with adopting particle diameter completely, the finished product Machine-made Sand (before hereinafter referred to as improvement Machine-made Sand) obtained through washed-out sand is again compared, in obtained finished product Machine-made Sand, 1.18mm tails over and is reduced to 40.1% from 49.8%, fine particle content significantly increases, and Machine-made Sand grating and workability of concrete significantly improve.
Machine-made Sand before Machine-made Sand after improvement and improvement is used for the concrete Formulation Ingredients of C50 and performance contrasts, the results are shown in Table 7 and table 8, to comprise after improvement the concrete formula of C50 of Machine-made Sand and performance in table 7, comprise the concrete formula of C50 of Machine-made Sand before improvement and performance in table 8.
embodiment 5:
A method for Machine-made Sand improved gradation, comprises the following steps:
1) 0-4.75mm aggregate chips is made through sand machine processed the Machine-made Sand that particle diameter is 0-2.36mm;
2) Machine-made Sand of the 0-2.36mm upper step obtained, mix with both Machine-made Sands that particle diameter is produced for 19-37.5mm rubble, wherein, the Machine-made Sand mass percent in the mixture of 0-2.36mm is 50%, then through washed-out sand, obtains finished product Machine-made Sand.
The finished product Machine-made Sand (hereinafter referred to as Machine-made Sand after improvement) adopting above-mentioned steps obtained, be that the rubble of 19-37.5mm drops into sand Machine-made Sand processed with adopting particle diameter completely, the finished product Machine-made Sand (before hereinafter referred to as improvement Machine-made Sand) obtained through washed-out sand is again compared, in obtained finished product Machine-made Sand, 1.18mm tails over and is reduced to 39.1% from 49.8%, significantly increase fine particle content, Machine-made Sand grating and workability of concrete significantly improve.
Machine-made Sand before Machine-made Sand after improvement and improvement is used for the concrete Formulation Ingredients of C50 and performance contrasts, the results are shown in Table 9 and table 10, to comprise after improvement the concrete formula of C50 of Machine-made Sand and performance in table 9, comprise the concrete formula of C50 of Machine-made Sand before improvement and performance in table 10.
embodiment 6:
A method for Machine-made Sand improved gradation, comprises the following steps:
The finished product Machine-made Sand adopting embodiment 1 to prepare, mixes (mass percent of finished product Machine-made Sand in mixture is 20%) with selecting the steel slag tailings after iron (2.36mm percent of pass 90%), gets final product the Machine-made Sand after preparation improvement.
Machine-made Sand before Machine-made Sand after improvement and improvement is used for the concrete Formulation Ingredients of C50 and performance contrasts, the results are shown in Table 11 and table 12, to comprise after improvement the concrete formula of C50 of Machine-made Sand and performance in table 11, comprise the concrete formula of C50 of Machine-made Sand before improvement and performance in table 12.
In this embodiment, the mass percent of finished product Machine-made Sand in mixture can be adjusted to 10-40wt%.
embodiment 7:
A method for Machine-made Sand improved gradation, comprises the following steps:
The finished product Machine-made Sand adopting embodiment 1 to prepare, mixes (mass percent of finished product Machine-made Sand in mixture is 5-25%) with copper tailing (2.36mm percent of pass 90%), can prepare the artificial sand that grating is good.
Claims (1)
1. the method for a Machine-made Sand improved gradation, it is characterized in that: adopt the one in following methods or two kinds: grating feeds intake: comprise step: be mix the aggregate chips that particle diameter is 0-4.75mm in the rubble of 9.5-19mm or 19-37.5mm at particle diameter, then drop into sand processed in sand machine processed; Industrial residue is mixed and is joined: be mix industrial residue in the Machine-made Sand of 0-4.75mm at particle diameter; During described grating feeds intake, particle diameter is after mixing of the aggregate chips of 0-4.75mm, and the mass percent in its mixture formed at rubble and aggregate chips is 15-35%; Described industrial residue comprises metallurgical slag, CHARACTERISTICS OF TAILINGS SAND, molding sand; Described industrial residue is after mixing, and the mass percent in the mixture that its Machine-made Sand at 0-4.75mm and industrial residue are formed is 5-30%; The sieve aperture percent of pass of the 2.36mm of described industrial residue is more than 85%.
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104138789B (en) * | 2014-06-20 | 2016-07-06 | 中国水利水电第十一工程局有限公司 | A kind of artificial grains of sand modulus of fineness controls technique |
| CN104261709A (en) * | 2014-08-26 | 2015-01-07 | 山东建泽混凝土有限公司 | Method utilizing tailing sand to carry out sand gradation improvement |
| CN104987002B (en) * | 2015-07-14 | 2017-03-29 | 美巢集团股份公司 | A kind of method that cement-based self-leveling mortar level is matched somebody with somebody |
| CN105060753A (en) * | 2015-08-20 | 2015-11-18 | 浙江工业大学 | Particle shaping method for machine-made aggregate |
| CN106336166A (en) * | 2016-08-23 | 2017-01-18 | 中国电建集团核电工程公司 | Method for increasing fluidity of concrete by using stone chip and machine-made sand compound addition technology |
| CN107913777B (en) * | 2017-10-19 | 2019-11-05 | 南京工业大学 | It is a kind of using CHARACTERISTICS OF TAILINGS SAND as the Machine-made Sand of primary raw material and dry fabrication technique |
| CN109206034B (en) * | 2018-08-21 | 2021-03-26 | 中国二十冶集团有限公司 | Method for blending fineness modulus of machine-made sand |
| CN110154231B (en) * | 2019-06-26 | 2021-02-09 | 广东建科源胜工程检测有限公司 | Blending method for optimizing grading of mixed sand particles |
| CN110467366B (en) * | 2019-08-23 | 2022-01-04 | 广东中南建设有限公司 | Energy-saving and environment-friendly machine-made sand for building construction |
| CN113149494A (en) * | 2021-04-20 | 2021-07-23 | 武汉理工大学 | Steel slag resource utilization method |
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| CN102153302A (en) * | 2010-11-29 | 2011-08-17 | 湖南振兴建材科技有限公司 | Method for producing modified mechanism sand and special admixture for dry-mixed mortar |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153302A (en) * | 2010-11-29 | 2011-08-17 | 湖南振兴建材科技有限公司 | Method for producing modified mechanism sand and special admixture for dry-mixed mortar |
Non-Patent Citations (1)
| Title |
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| 尾矿混合砂混凝土的性能研究;兰青等;《武汉理工大学学报》;20121231;第34卷(第12期);第19-23页 * |
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Inventor after: Cao Lianghong Inventor after: Lu Zili Inventor after: Shen Weiguo Inventor after: Chen Yuexian Inventor after: Liu Wenhao Inventor after: Wang Mengxia Inventor after: Wang Guimin Inventor after: Zhao Qinglin Inventor after: Mai Weixiong Inventor after: Xie Jianliang Inventor before: Cao Lianghong Inventor before: Lu Zili Inventor before: Shen Weiguo Inventor before: Chen Yuexian Inventor before: Liu Wenhao Inventor before: Wang Mengxia Inventor before: Wang Guimin Inventor before: Zhao Qinglin Inventor before: Mai Weixiong Inventor before: Xie Jianliang |
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Address after: 510320 No. 942 Guangzhou Avenue Center, Tianhe District, Guangzhou City, Guangdong Province Co-patentee after: Wuhan University of Technology Patentee after: Poly Growing Up Engineering Co., Ltd. Address before: 510320 No. 942 Guangzhou Avenue Center, Guangzhou City, Guangdong Province Co-patentee before: Wuhan University of Technology Patentee before: Guangdong Changda Highway Engineering Co., Ltd. |