CN104261709A - Method utilizing tailing sand to carry out sand gradation improvement - Google Patents
Method utilizing tailing sand to carry out sand gradation improvement Download PDFInfo
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- CN104261709A CN104261709A CN201410423421.5A CN201410423421A CN104261709A CN 104261709 A CN104261709 A CN 104261709A CN 201410423421 A CN201410423421 A CN 201410423421A CN 104261709 A CN104261709 A CN 104261709A
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Abstract
The invention discloses a method utilizing tailing sand to carry out sand gradation improvement, and belongs to the field of construction material preparation. The method comprises the following steps: (1) screening the tailing sand, and calculating the fineness modulus; (2) screening the sand needed to be improved, and calculating the fineness modulus; (3) mixing the tailing sand and the sand needed to be improved according to a ratio of a to b, and then screening the mixed sand; (4) determining the mixed sand. The method has the advantages that ore tailing wastes are utilized and high quality premixed concrete is obtained at the same time. The invention provides a method utilizing tailing sand to carry out sand gradation improvement. In the method, the tailing sand is mixed with sand needed to be improved according to a certain ratio, the tailing sand with low fineness modulus is used to modify the sand with high fineness modulus, thus the gradation of the obtained mixed sand meets the requirements of II zone middle sand, and the premixed concrete made of the improved mixed sand is accord withrelated criteria.
Description
Technical field
The present invention relates to a kind of sand improved gradation method, belong to material of construction preparation field, specifically a kind of method utilizing CHARACTERISTICS OF TAILINGS SAND to carry out sand improved gradation.
Background technology
Along with the development of national basis Facilities Construction, concrete consumption continues to increase.Consumption as the sand of one of concrete important raw and processed materials constantly rises.In this process, high-quality natural sand is consumed in a large number, to such an extent as to high-quality natural sand price is high or not easily obtain.Each ready mixed concrete enterprise starts to seek the general natural sand of quality or Machine-made Sand for this reason, and these natural sands or the general fineness modulus of Machine-made Sand higher, cause the concrete sand coarse aggregate ratio using these sand to produce higher, not only increase concrete production cost, also add the risk of concrete cracking, thus reduce concrete endurance quality.Due to the acting in conjunction of the many factors such as ore quality, state of the art, the every annual meeting of China produces the tailing waste thing of several hundred million tons, and annual quantity discharged is continuing to increase.A large amount of mine tailings can land occupation, contaminate environment.The present invention then utilizes tailing waste thing and CHARACTERISTICS OF TAILINGS SAND, the natural sand higher to fineness modulus or Machine-made Sand are improved, the natural sand or the Machine-made Sand that make not meet building requirements meet the requirement of ready mixed concrete by improvement, not only turn waste into wealth, reduce the problem of mine tailing land occupation, contaminate environment, and when building performance inconvenience, the cost of ready mixed concrete is lowered, is conducive to economizing on resources.
Summary of the invention
The invention solves the comprehensive utilization of tailing waste thing, a difficult problem for the ready mixed concrete of production high-quality simultaneously, a kind of method utilizing CHARACTERISTICS OF TAILINGS SAND to carry out sand improved gradation is provided, by CHARACTERISTICS OF TAILINGS SAND with need improve sand and mix by a certain percentage, with the need improvement sand that the CHARACTERISTICS OF TAILINGS SAND improvement fineness modulus that fineness modulus is low is high, the grating of mixed sand is finally made to meet the medium sand requirement of IIth district, and use the mixed sand after improved gradation to prepare ready mixed concrete, meet relevant criterion requirement, concrete operation step of the present invention is as follows:
Utilize CHARACTERISTICS OF TAILINGS SAND to carry out a method for sand improved gradation, concrete steps are:
1. sieve CHARACTERISTICS OF TAILINGS SAND, the accumulation on each square hole sieve tails over and represents with Ax, calculates its fineness modulus;
2. sieve improveing sand, the accumulation on each square hole sieve tails over and represents with Bx, calculates its fineness modulus;
3. by CHARACTERISTICS OF TAILINGS SAND with need improve sand and to mix by a:b and sieve, the accumulation on each square hole sieve tails over and represents with Cx, and Cx=a × Ax+b × Bx, x value 1,2,3,4,5,6, calculates its fineness modulus, wherein a+b=1, and a and b gets the positive integer of 0.05 doubly;
4. when the fineness modulus value of mixed sand is 2.3 ~ 3.0 time, after fully being mixed by the need improvement sand of a*100% part CHARACTERISTICS OF TAILINGS SAND and b*100% part, mixed sand is obtained; When the fineness modulus value of mixed sand is not 2.3 ~ 3.0 time, repeating step 1. 2. 3..
Described CHARACTERISTICS OF TAILINGS SAND is in prepared from tailing sand of iron ore, nonferrous metals ore CHARACTERISTICS OF TAILINGS SAND, gold ore deposit CHARACTERISTICS OF TAILINGS SAND in one or several.
Described need improvement sand is one or more in natural sand, Machine-made Sand, reclaimed sand.
A mixed sand prepared by the method utilizing CHARACTERISTICS OF TAILINGS SAND to carry out sand improved gradation, forms by improveing sand according to a*100% part CHARACTERISTICS OF TAILINGS SAND of mass fraction and the need of b*100% part.
Ready mixed concrete prepared by described mixed sand, is made up of the following raw material according to mass fraction: 200 ~ 600 parts of gelling material, the mixed sand of 400 ~ 1250 parts, the stone of 400 ~ 1250 parts, the water of 120 ~ 250 parts, admixtures of 0 ~ 30 part form.
Described gelling material is the mixture of cement or cement and mineral admixture.
Described mineral admixture is one or more in flyash, breeze, silicon ash.
Described admixture comprises water reducer, pumping agent.
The preparation method of described ready mixed concrete, in preparation process, feeding sequence is that described stone and mixed sand stir 10s ~ 30s, then drops into described gelling material, water, admixture, stirs 10s ~ 60s, goes out machine.
Usefulness of the present invention is: the invention solves the problem that tailing waste thing is difficult to utilize, produced the ready mixed concrete of high-quality simultaneously, a kind of method utilizing CHARACTERISTICS OF TAILINGS SAND to carry out sand improved gradation is provided, by CHARACTERISTICS OF TAILINGS SAND with need improve sand and mix by a certain percentage, with the need improvement sand that the CHARACTERISTICS OF TAILINGS SAND improvement fineness modulus that fineness modulus is low is high, the grating of mixed sand is finally made to meet the medium sand requirement of IIth district, and use the mixed sand after improved gradation to prepare ready mixed concrete, meet relevant criterion requirement, the ready mixed concrete not only workability utilizing method of the present invention to prepare, weather resistance significantly improves, and workability is better, the present invention is turned waste into wealth in a word, decrease the destruction of tailing waste thing to environment, decrease the consumption of sand, protect environment complete, meet recycling economy, the social desirability of Sustainable development, and reduce concrete production cost, be conducive to economizing on resources.
Embodiment
According to embodiment, the present invention is further elaborated.The concrete data of embodiment 1-3 are see table 1
Table 1
Above-mentioned data obtain according to a kind of method utilizing CHARACTERISTICS OF TAILINGS SAND to carry out sand improved gradation, and concrete steps are:
1. sieve CHARACTERISTICS OF TAILINGS SAND, the accumulation on each square hole sieve tails over and represents with Ax, calculates its fineness modulus;
2. sieve improveing sand, the accumulation on each square hole sieve tails over and represents with Bx, calculates its fineness modulus;
3. by CHARACTERISTICS OF TAILINGS SAND with need improve sand and to mix by a:b and sieve, the accumulation on each square hole sieve tails over and represents with Cx, and Cx=a × Ax+b × Bx, x value 1,2,3,4,5,6, calculates its fineness modulus, wherein a+b=1, and a and b gets the positive integer of 0.05 doubly;
4. when the fineness modulus value of mixed sand is 2.3 ~ 3.0 time, after fully being mixed by the need improvement sand of a*100% part CHARACTERISTICS OF TAILINGS SAND and b*100% part, mixed sand is obtained; When the fineness modulus value of mixed sand is not 2.3 ~ 3.0 time, repeating step 1. 2. 3..
Wherein for CHARACTERISTICS OF TAILINGS SAND, fineness modulus calculation formula is: fineness modulus=[(A2+A3+A4+A5+A6)-5*A1]/(100-A1), a value 0.35 in embodiment 1, b value 0.65, a+b=1, the fineness modulus 2.7 of mixed sand, between 2.3 ~ 3.0, the mixed sand of embodiment 1 is fully mixed to get according to the mass fraction nonferrous metals ore CHARACTERISTICS OF TAILINGS SAND of above-mentioned 35% and the Machine-made Sand of 65%.
A value 0.5 in embodiment 2, b value 0.5, a+b=1, the fineness modulus 2.7 of mixed sand, between 2.3 ~ 3.0, the mixed sand of embodiment 2 is that the need formed according to the mass fraction iron tailings sand of above-mentioned 50% and the river sand of 50% and Machine-made Sand are improved sand and are fully mixed to get.
A value 0.2, b value 0.8, a+b=1 in embodiment 3, the fineness modulus 2.8 of mixed sand, between 2.3 ~ 3.0, the mixed sand of embodiment 3 is fully mixed to get according to the mass fraction gold ore deposit CHARACTERISTICS OF TAILINGS SAND of above-mentioned 20% and the river sand of 80%.
Mixed sand significant parameter index in embodiment 1-3, see table 2
Wherein the significant parameter of mixed sand uses JGJ52-2006 " regular concrete sand, stone quality and test method standard " inspection.
Utilize ready mixed concrete prepared by the mixed sand of above-described embodiment 1-3, general data is see table 3
Table 3
According to concrete embodiment, detect the serviceability of ready mixed concrete disclosed by the invention, mechanical property, endurance quality.The test method of serviceability is tested according to GB/T50080-2002 " Standard for test methods of properties of ordinary concrete mixture standard ", and Testing index is required to meet construction requirement; Mechanical test method is tested according to GB/T50081-2002 " standard for test methods of mechanical properties of ordinary concrete ", and Testing index is required to meet design strength requirement; The test method of endurance quality is tested according to GB/T50082-2002 " Standard for test methods of longterm performance and durability of ordinary concrete standard ", and Testing index is required to meet design life requirement.
Ready mixed concrete leading indicator is see table 4
Table 4
Wherein, above-mentioned ready mixed concrete is in preparation process, and feeding sequence is all that stone and mixed sand stir 10s ~ 30s, then drops into described gelling material, water, admixture, stirs 10s ~ 60s, goes out machine.
Technology known in those skilled in the art is except technical characteristic disclosed in specification sheets of the present invention.
Claims (9)
1. utilize CHARACTERISTICS OF TAILINGS SAND to carry out a method for sand improved gradation, it is characterized in that concrete steps are:
1. sieve CHARACTERISTICS OF TAILINGS SAND, the accumulation on each square hole sieve tails over and represents with Ax, calculates its fineness modulus;
2. sieve improveing sand, the accumulation on each square hole sieve tails over and represents with Bx, calculates its fineness modulus;
3. by CHARACTERISTICS OF TAILINGS SAND with need improve sand and to mix by a:b and sieve, the accumulation on each square hole sieve tails over and represents with Cx, and Cx=a × Ax+b × Bx, x value 1,2,3,4,5,6, calculates its fineness modulus, wherein a+b=1, and a and b gets the positive integer of 0.05 doubly;
4. when the fineness modulus value of mixed sand is 2.3 ~ 3.0 time, after fully being mixed by the need improvement sand of a*100% part CHARACTERISTICS OF TAILINGS SAND and b*100% part, mixed sand is obtained; When the fineness modulus value of mixed sand is not 2.3 ~ 3.0 time, repeating step 1. 2. 3..
2. a kind of method utilizing CHARACTERISTICS OF TAILINGS SAND to carry out sand improved gradation according to claim 1, is characterized in that described CHARACTERISTICS OF TAILINGS SAND is in prepared from tailing sand of iron ore, nonferrous metals ore CHARACTERISTICS OF TAILINGS SAND, gold ore deposit CHARACTERISTICS OF TAILINGS SAND in one or several.
3. a kind of method utilizing CHARACTERISTICS OF TAILINGS SAND to carry out sand improved gradation according to claim 1 and 2, is characterized in that described need improvement sand is one or more in natural sand, Machine-made Sand, reclaimed sand.
4. mixed sand prepared by a kind of method utilizing CHARACTERISTICS OF TAILINGS SAND to carry out sand improved gradation according to any one of claim 1-3, is characterized in that forming by improveing sand according to a*100% part CHARACTERISTICS OF TAILINGS SAND of mass fraction and the need of b*100% part.
5. the ready mixed concrete utilizing the mixed sand described in claim 4 to prepare, is characterized in that being made up of the following raw material according to mass fraction: 200 ~ 600 parts of gelling material, the mixed sand of 400 ~ 1250 parts, the stone of 400 ~ 1250 parts, the water of 120 ~ 250 parts, admixtures of 0 ~ 30 part form.
6. ready mixed concrete according to claim 5, is characterized in that described gelling material is the mixture of cement or cement and mineral admixture.
7. ready mixed concrete according to claim 6, is characterized in that described mineral admixture is one or more in flyash, breeze, silicon ash.
8. the ready mixed concrete according to any one of claim 5-7, is characterized in that described admixture comprises water reducer, pumping agent.
9. the preparation method of the ready mixed concrete according to any one of claim 5-8, it is characterized in that in described preparation process, feeding sequence is that described stone and mixed sand stir 10s ~ 30s, drop into described gelling material, water, admixture again, stir 10s ~ 60s, go out machine.
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Cited By (8)
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| CN104743975A (en) * | 2015-03-09 | 2015-07-01 | 中国十七冶集团有限公司 | Iron tailing super-fine sand concrete |
| CN104803647A (en) * | 2015-03-09 | 2015-07-29 | 中国十七冶集团有限公司 | Masonry mortar with iron tailings substituting for partial natural sand |
| CN105236860A (en) * | 2015-09-11 | 2016-01-13 | 中国十七冶集团有限公司 | Iron tailings mixing sand concrete |
| CN108821682A (en) * | 2018-07-03 | 2018-11-16 | 中国建筑材料科学研究总院有限公司 | A kind of low cost alternate resources high crack-resisting and its preparation method |
| CN110154231A (en) * | 2019-06-26 | 2019-08-23 | 东莞市源胜建设工程质量检测有限公司 | A kind of modulator approach of optimization mixing sand particle size distribution |
| CN110372241A (en) * | 2019-08-05 | 2019-10-25 | 荣成市顺达建材有限公司 | A kind of mixed sand and preparation method thereof for quotient's concrete |
| CN112851286A (en) * | 2021-01-30 | 2021-05-28 | 山东国环固废创新科技中心有限公司 | Method for preparing underground cementing filling material by fully utilizing fine-grained gold tailings |
| CN113135696A (en) * | 2021-04-21 | 2021-07-20 | 上海市建筑科学研究院有限公司 | Large-dosage steel slag solid waste water hydraulic ecological frame concrete and proportioning determination method thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104743975A (en) * | 2015-03-09 | 2015-07-01 | 中国十七冶集团有限公司 | Iron tailing super-fine sand concrete |
| CN104803647A (en) * | 2015-03-09 | 2015-07-29 | 中国十七冶集团有限公司 | Masonry mortar with iron tailings substituting for partial natural sand |
| CN105236860A (en) * | 2015-09-11 | 2016-01-13 | 中国十七冶集团有限公司 | Iron tailings mixing sand concrete |
| CN108821682A (en) * | 2018-07-03 | 2018-11-16 | 中国建筑材料科学研究总院有限公司 | A kind of low cost alternate resources high crack-resisting and its preparation method |
| CN110154231A (en) * | 2019-06-26 | 2019-08-23 | 东莞市源胜建设工程质量检测有限公司 | A kind of modulator approach of optimization mixing sand particle size distribution |
| CN110372241A (en) * | 2019-08-05 | 2019-10-25 | 荣成市顺达建材有限公司 | A kind of mixed sand and preparation method thereof for quotient's concrete |
| CN110372241B (en) * | 2019-08-05 | 2022-04-01 | 荣成市顺达建材有限公司 | Mixed sand for commercial concrete and preparation method thereof |
| CN112851286A (en) * | 2021-01-30 | 2021-05-28 | 山东国环固废创新科技中心有限公司 | Method for preparing underground cementing filling material by fully utilizing fine-grained gold tailings |
| CN113135696A (en) * | 2021-04-21 | 2021-07-20 | 上海市建筑科学研究院有限公司 | Large-dosage steel slag solid waste water hydraulic ecological frame concrete and proportioning determination method thereof |
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Application publication date: 20150107 |