CN102432237A - Method for preparing overlength large size or fair-faced concrete by using Dongchuan river sand - Google Patents
Method for preparing overlength large size or fair-faced concrete by using Dongchuan river sand Download PDFInfo
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- CN102432237A CN102432237A CN2011102675629A CN201110267562A CN102432237A CN 102432237 A CN102432237 A CN 102432237A CN 2011102675629 A CN2011102675629 A CN 2011102675629A CN 201110267562 A CN201110267562 A CN 201110267562A CN 102432237 A CN102432237 A CN 102432237A
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Abstract
The invention discloses a method for preparing overlength large size or fair-faced concrete by using Dongchuan river sand. The overlength large size or fair-faced concrete is prepared by mixing 30.2-30.8 wt% of Dongchuan river sand, 40.9-44.8 wt% of crushed stone, 12.0-17.2 wt% of cement, 3-5.9 wt% of industrial waste residue, and 7.3-8.2 wt% of water, and 0.3-0.4 wt% of additive, and stirring, wherein, the Dongchuan river sand is river sand formed by depositing of debris flow, which is formed by rain wash of mountain surface rocks after weathering, in channels of Xiaojiang River Watershed in Dongchuan District and peripheral areas of Kunming city in Yunnan province. By using a lot of Dongchuan river sand, the method has the advantages of environmental protection, safety, low cost of selecting and purchasing, reasonable formula, and simpleness in the preparation method. The prepared concrete has excellent performance and good workability. The overlength large volume or fair-faced concrete prepared by the method has the advantages of high strength, good endurance quality, uniform surface color, flatness, smoothness, angular look, environmental protection, no large area bubbles on the surface, and no cracking.
Description
Technical field
The present invention relates to building material technical field, mainly is the concrete technology field.
Background technology
Current; Because the high speed development of construction industry,, cause people to exploit limestone mine and silica sand mine in a large number to the demand of the raw materials such as sandstone of concrete batching also rapid growth; Bring serious environmental destruction problem day by day; Therefore,, how to seek new equivalent material and receive much concern more particularly in the use and use of concrete and associated materials at material of construction with the destruction of reducing to resource environment.
In Kunming, Yunnan Province Dongchuan District and Xiao Jiang basin, surrounding area; Since after the rock decay of massif top layer by rain drop erosion; All can form serious rubble flow every year; The river sand (nominal particle diameter is less than 5mm) that the rubble flow alluvial is produced in the river course is called Dongchuan rubble flow river sand, is called for short river, Dongchuan sand.For a long time, rubble flow all is the Xiao Jiang basin, and particularly the most outstanding natural disaster in area, Dongchuan is given local city-building, resident living, and industrial and mineral traffic and farmland water conservancy cause very serious harm, are big disasters anxious to be solved in local the construction.Numerous debris flow gully crowds nibbles, deposits to the river valley to the hillside; Cause regional environment deterioration, hillside to lie waste; Flood land " sandstoneization " phenomenon is on the rise, and reduce day by day in the arable land that people depend on for existence, and the ecotope imbalance is aggravating with the vicious cycle that environmental quality descends gradually.Development and utilization for rubble flow river, Dongchuan sand is local government's urgent problem always.
River, Dongchuan sand is easy to selecting and purchasing, adopts mountain sand and fried mountain quarrying processing mechanism sand facies ratio with digging, and not only environmental protection, safety but also selecting and purchasing cost are lower, are that preparation is green, high-strength, the quality matetrial of high performance concrete.Its promotion and application; Can find the suitable equivalent material of high-quality for engineering construction on the one hand; Reduce the environmental problem that the exploitation of limestone mine and silica sand mine brings; Also can solve the problem of the concrete cracking that causes owing to fine aggregate is of poor quality on the other hand, lay a good foundation for building the competent heavy construction of high-quality.
On river, Dongchuan sand is used, because prior art never works out rational technical scheme when utilizing river, Dongchuan sand to make concrete; And the shortage systematic research proves; Make the concrete of trial-production have hidden danger of quality, cause the quality dispute easily, this makes river, Dongchuan sand can only be limited in the limited field; The popularization that can't be widely used through the application in concrete has seriously hindered the use of Dongchuan river sand concrete in building operation.
In addition; The concrete of prior art is when constructing overlength mass concrete and clear-water concrete and construct body; Because the property of raw material of concrete batching and the deficiency of prescription, usually defectives such as the big area bubble is residual, cracking, irregular colour is even, unfairness is smooth, corner angle fuzzy appear constructing the surface.
Summary of the invention
The objective of the invention is to solve the deficiency that prior art exists; A kind of method of utilizing Dongchuan river sand concrete batching is provided, make to adopt the big volume of overlength or clear-water concrete intensity height, excellent in durability that this concrete constructs, have good workability, environmental protection, appearance color even, smooth smooth, corner angle are clearly demarcated.
The objective of the invention is to realize through following technical scheme.
The method of river, Dongchuan sand preparation big volume of overlength or clear-water concrete; Adopt following method to make: to press mass percent and adopt 30.2%～30.8% river, Dongchuan sand, 40.9%～44.8% rubble; 12.0%～17.2% cement, 3%～5.9% industrial residue, 7.3%～8.2% water; The admixture of adding 0.3%～0.4%, stirring obtains; River, said Dongchuan sand is Kunming, Yunnan Province Dongchuan District and Xiao Jiang basin, surrounding area, the rubble flow alluvial formed river sand in the river course that is formed by rain drop erosion after the rock decay of massif top layer.
The particle diameter of river, Dongchuan according to the invention sand is 0.16mm～5mm, fineness modulus 2.3～3.0.Said admixture is the polycarboxylic acid admixture.Said industrial residue is slag powders or flyash.
The present invention utilizes river, Dongchuan sand in a large number, and environmental protection, safety and selecting and purchasing cost are lower.Its prescription rationally, making method is simple, the concrete performance that makes is good, have good workability.Adopt big volume of overlength that concrete of the present invention constructs or clear-water concrete intensity height, excellent in durability, appearance color even, smooth smooth, corner angle clearly demarcated, environmental protection, the no big area bubble in surface, can not ftracture.
Further set forth content of the present invention below in conjunction with embodiment.
Embodiment
The method of river, Dongchuan sand preparation big volume of overlength or clear-water concrete; Adopt following method to make: to press mass percent and adopt 30.2%～30.8% river, Dongchuan sand, 40.9%～44.8% rubble; 12.0%～17.2% cement, 3%～5.9% industrial residue, 7.3%～8.2% water; The admixture of adding 0.3%～0.4%, stirring obtains; River, said Dongchuan sand is Kunming, Yunnan Province Dongchuan District and Xiao Jiang basin, surrounding area, the rubble flow alluvial formed river sand in the river course that is formed by rain drop erosion after the rock decay of massif top layer.The particle diameter of river, Dongchuan sand is 0.16mm～5mm, fineness modulus 2.3～3.0.Rubble is the rock particles of nominal particle diameter greater than 5mm.Industrial residue is slag powders or flyash, and flyash generally adopts II level and following low-quality flyash.Cement uses portland cement or other cement.Used water should satisfy " concrete water standard " JGJ63-2006.Admixture is the efficient retardation water reducing agent of polycarboxylic acid, other water reducer of using always in the three auspicious vivid-500 polycarboxylic acid superplasticizers that can buy on the available markets or some industries.
Embodiment 1
Press mass percent; Getting 30.2% particle diameter is river, Dongchuan sand of 0.16～5mm, fineness modulus 3.0,40.9% rubble, 17.0% cement, 4.3% slag powders, 7.3% water, three auspicious vivid-500 polycarboxylic acid superplasticizers of adding 0.3%, stirs and prepares concrete of the present invention in 45 seconds.This concrete is used to pour into a mould the big volume of overlength or clear-water concrete is constructed body, and 28 days intensity is 61.8MPa after the concrete.The surfacing of constructing body is smooth, and color and luster is even, corner angle are clearly demarcated, no big area bubble and cracking.
Embodiment 2
Press mass percent; Getting 30.2% particle diameter is river, Dongchuan sand of 0.16～5mm, fineness modulus 2.8,44.5% rubble, 13.7% cement, 3.0% slag powders, 8.2% water; Three auspicious vivid-500 polycarboxylic acid superplasticizers of adding 0.4% stir and prepared concrete in 35 seconds.This concrete is used to pour into a mould the big volume of overlength or clear-water concrete is constructed body, and 28 days intensity is 47.6MPa after the concrete.The surfacing of constructing body is smooth, and color and luster is even, corner angle are clearly demarcated, no big area bubble and cracking.
Embodiment 3
Press mass percent; Getting 30.6% particle diameter is river, Dongchuan sand of 0.16～5mm, fineness modulus 2.5,44.8% rubble, 12% cement, 4.45% slag powders, 7.8% water; Three auspicious vivid-500 polycarboxylic acid superplasticizers of adding 0.35% stir and prepared concrete in 45 seconds.This concrete is used to pour into a mould the big volume of overlength or clear-water concrete is constructed body, and 28 days intensity is 54.8MPa after the concrete.The surfacing of constructing body is smooth, and color and luster is even, corner angle are clearly demarcated, no big area bubble and cracking.
Embodiment 4
Getting 30.8% particle diameter is river, Dongchuan sand of 0.16～5mm, fineness modulus 2.3,41% rubble; 17.2% cement, 3.4% II level flyash, 7.3% water; Three auspicious vivid-500 polycarboxylic acid superplasticizers of adding 0.3% stir and prepared concrete in 30 seconds.28 days intensity is 40.3MPa after the concrete.Surfacing is smooth, and color and luster is even.
Instance 5
Getting 30.8% particle diameter is river, Dongchuan sand of 0.16～5mm, fineness modulus 3.0,41.6% rubble; 13.7% cement, 5.9% low-quality flyash, 7.6% water; Three auspicious vivid-500 polycarboxylic acid superplasticizers of adding 0.4% stir and prepared concrete of the present invention in 45 seconds.This concrete is used to pour into a mould the big volume of overlength or clear-water concrete is constructed body, and 28 days intensity is 52.1MPa after the concrete.The surfacing of constructing body is smooth, and color and luster is even, corner angle are clearly demarcated, no big area bubble and cracking.
The present invention is different from common concrete, can be widely used in the finished concrete of building construction, bridge etc., can one-time cast-forming; Need not do any outer decoration after the moulding, the natural surface effect that directly adopts onsite concrete is as facing, and surfacing is smooth; Color and luster is even, and corner angle are clearly demarcated, no clashing and breaking and pollution; Maximum need protective material transparent on surfaces coated, and outward appearance nature, serious is a structure set and decorate novel, green, the high performance concrete in one.
Claims (4)
1. river, Dongchuan sand is prepared the method for big volume of overlength or clear-water concrete; It is characterized in that, adopt following method to make: press mass percent and adopt 30.2%～30.8% river, Dongchuan sand, 40.9%～44.8% rubble, 12.0%～17.2% cement; 3%～5.9% industrial residue; 7.3%～8.2% water, the admixture of adding 0.3%～0.4%, stirring obtains; River, said Dongchuan sand is Kunming, Yunnan Province Dongchuan District and Xiao Jiang basin, surrounding area, the rubble flow alluvial formed river sand in the river course that is formed by rain drop erosion after the rock decay of massif top layer.
2. the method for river, Dongchuan according to claim 1 sand preparation big volume of overlength or clear-water concrete is characterized in that the particle diameter of river, said Dongchuan sand is 0.16mm～5mm, fineness modulus 2.3～3.0.
3. the method for river, Dongchuan according to claim 1 sand preparation big volume of overlength or clear-water concrete is characterized in that said admixture is the polycarboxylic acid admixture.
4. the method for river, Dongchuan according to claim 1 sand preparation big volume of overlength or clear-water concrete is characterized in that said industrial residue is slag powders or flyash.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102675629A CN102432237A (en) | 2011-09-10 | 2011-09-10 | Method for preparing overlength large size or fair-faced concrete by using Dongchuan river sand |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011102675629A CN102432237A (en) | 2011-09-10 | 2011-09-10 | Method for preparing overlength large size or fair-faced concrete by using Dongchuan river sand |
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| CN102432237A true CN102432237A (en) | 2012-05-02 |
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| CN2011102675629A Pending CN102432237A (en) | 2011-09-10 | 2011-09-10 | Method for preparing overlength large size or fair-faced concrete by using Dongchuan river sand |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103570317A (en) * | 2013-11-15 | 2014-02-12 | 北京新奥混凝土集团有限公司 | Fair-faced concrete produced by using construction waste recycled aggregates |
| CN105060777A (en) * | 2015-07-15 | 2015-11-18 | 廊坊荣盛混凝土有限公司 | Application of high-content pebbles in concrete |
| CN105271993A (en) * | 2015-10-13 | 2016-01-27 | 平煤神马建工集团有限公司 | Pumpable fair-faced concrete |
| CN108818949A (en) * | 2018-07-02 | 2018-11-16 | 郭帅 | A kind of shuttle-type dam concrete mixing apparatus intercepting mud-rock flow |
| CN110041027A (en) * | 2019-04-22 | 2019-07-23 | 上海建工一建集团有限公司 | A kind of clear-water concrete material and preparation method |
-
2011
- 2011-09-10 CN CN2011102675629A patent/CN102432237A/en active Pending
Non-Patent Citations (2)
| Title |
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| 席永慧等: "清水混凝土的强度性能研究", 《建筑技术》 * |
| 王仪: "东川：点遍河砂都是金", 《昆明日报》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103570317A (en) * | 2013-11-15 | 2014-02-12 | 北京新奥混凝土集团有限公司 | Fair-faced concrete produced by using construction waste recycled aggregates |
| CN103570317B (en) * | 2013-11-15 | 2015-09-30 | 北京新奥混凝土集团有限公司 | A kind of clear-water concrete using construction refuse regenerated aggregate to produce |
| CN105060777A (en) * | 2015-07-15 | 2015-11-18 | 廊坊荣盛混凝土有限公司 | Application of high-content pebbles in concrete |
| CN105271993A (en) * | 2015-10-13 | 2016-01-27 | 平煤神马建工集团有限公司 | Pumpable fair-faced concrete |
| CN108818949A (en) * | 2018-07-02 | 2018-11-16 | 郭帅 | A kind of shuttle-type dam concrete mixing apparatus intercepting mud-rock flow |
| CN110041027A (en) * | 2019-04-22 | 2019-07-23 | 上海建工一建集团有限公司 | A kind of clear-water concrete material and preparation method |
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Application publication date: 20120502 |