CN109053090A - A kind of superfine sand concrete - Google Patents
A kind of superfine sand concrete Download PDFInfo
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- CN109053090A CN109053090A CN201811187692.XA CN201811187692A CN109053090A CN 109053090 A CN109053090 A CN 109053090A CN 201811187692 A CN201811187692 A CN 201811187692A CN 109053090 A CN109053090 A CN 109053090A
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- sand
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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
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
- C04B28/04—Portland cements
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- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The application belongs to building material technical field, more particularly to a kind of superfine sand concrete.The fineness modulus of ultra fine sand is 1.5~0.7, and average grain diameter is 0.25mm or less.Superfine sand concrete needs to use plurality of raw materials, and the cement needed in existing superfine sand concrete preparation process is more, so that the high expensive of product.The application provides a kind of superfine sand concrete, and the superfine sand concrete is composed of the following raw materials in parts by weight: cement 280~400, water 100~200, ultra fine sand 500~700, stone 1100~1200, flyash 100~120, high-efficiency water-reducing agent of poly-carboxylic acid 10~15, middle sand 0~150.Due to having used ultra fine sand, under the premise of meeting concrete strength requirement, reduces cement consumption to the greatest extent, while selecting other composition materials, reduce Cost of Concrete.
Description
Technical field
The application belongs to building material technical field, more particularly to a kind of superfine sand concrete.
Background technique
Concrete, referred to as " concrete (t ó ng) ": referring to will be gathered materials cementing integral engineered composite material by cementitious material
General designation.One word of concrete usually said, which refers to, makees cementitious material with cement, and sand, stone work gather materials；With water (can contain additive and
Admixture) cooperate by a certain percentage, it is agitated obtained by cement concrete, also referred to as normal concrete, it is widely used in building
Engineering.
The fineness modulus of ultra fine sand is 1.5~0.7, and average grain diameter is 0.25mm or less.Superfine sand concrete needs are used
Plurality of raw materials, the cement needed in existing superfine sand concrete preparation process is more, so that the high expensive of product.
Summary of the invention
1. technical problems to be solved
Fineness modulus based on ultra fine sand is 1.5~0.7, and average grain diameter is 0.25mm or less.Superfine sand concrete needs
Plurality of raw materials is used, the cement needed in existing superfine sand concrete preparation process is more, so that the high expensive of product
Problem, this application provides a kind of superfine sand concretes.
2. technical solution
1, to achieve the above object, this application provides a kind of superfine sand concrete, the superfine sand concrete by
The raw material composition of following parts by weight: cement 280~400, water 100~200, ultra fine sand 500~700, stone 1100~1200, powder
Coal ash 100~120, high-efficiency water-reducing agent of poly-carboxylic acid 10~15, middle sand 0~150.
Optionally, the superfine sand concrete is composed of the following raw materials in parts by weight: cement 290~390, and water 130~
180, ultra fine sand 520~690, stone 1105~1190, flyash 105~118, high-efficiency water-reducing agent of poly-carboxylic acid 11~14, middle sand 0
~140.
Optionally, the superfine sand concrete is composed of the following raw materials in parts by weight: cement 300, water 170, ultra fine sand
630, stone 1170, flyash 110, high-efficiency water-reducing agent of poly-carboxylic acid 12.5.
Optionally, the superfine sand concrete is composed of the following raw materials in parts by weight: cement 300, water 170, ultra fine sand
547, stone 1116, flyash 110, high-efficiency water-reducing agent of poly-carboxylic acid 12, middle sand 137.
Optionally, the middle sand is sand in washing, and the middle grain fineness number modulus is 2.5~3.0.
3. beneficial effect
Compared with prior art, a kind of beneficial effect of superfine sand concrete provided by the present application is:
Superfine sand concrete provided by the present application, by by cement, water, ultra fine sand, stone, flyash, polycarboxylic acids is efficient
Water-reducing agent and middle sand are mixed according to a certain percentage, due to having used ultra fine sand, before meeting concrete strength requirement
It puts, reduces cement consumption to the greatest extent, while selecting other composition materials, reduce Cost of Concrete.
Specific embodiment
Hereinafter, the specific embodiment of the application will be described in detail, it is affiliated according to these detailed descriptions
Field technical staff can implement the application it can be clearly understood that the application.Without prejudice to the application principle,
Feature in each different embodiment can be combined to obtain in new embodiment, or substitution some embodiments
Certain features obtain other preferred embodiments.
Workability is a comprehensive technological property, it is closely related with construction technology.Mobility, water conservation are generally included
Property and three aspects such as cohesiveness.
1, mobility refers to fresh concrete under the action of self weight or machinery are vibrated, and can generate flowing, and uniformly closely knit
Ground fills up the performance of template.Mobility reflects dilute thick degree of mixture.If concrete mix is too dry thick, mobility
Difference, it is difficult to vibration compacting；If mixture is excessively dilute, good fluidity, but it is easy to appear laminated segregation phenomenon.Major influence factors are
Concrete water amount.
2, cohesiveness, which refers to, certain cohesive strength between the composition material of fresh concrete, in the construction process, will not
The performance of layering and segregation phenomenon occurs.The uniformity of cohesiveness reflection concrete mix.If concrete mix cohesiveness
Bad, then gathering materials in concrete can be easily separated with cement slurry, cause concrete uneven, will appear honeycomb and cavity etc. after vibrating
Phenomenon.Major influence factors are cement mortar rates.
3, water-retaining property, which refers to, has certain water holding capacity in fresh concrete, in the construction process, will not occur serious
The performance of excreting water phenomenon.The stability of water-retaining property reflection concrete mix.The inside concrete of poor water retention property easily forms permeable
Channel, influences the density of concrete, and reduces the intensity and durability of concrete.Major influence factors are cement types, use
Amount and fineness.
The workability of fresh concrete is that the comprehensive of mobility, cohesiveness and water-retaining property embodies, the flowing of fresh concrete
It had not only been interknited between property, cohesiveness and water-retaining property, but also has been commonly present contradiction.Therefore, it under conditions of certain construction technology, newly mixes
The workability of concrete is that the contradiction of above tripartite's surface properties is unified.
Embodiment 1
The application provides a kind of superfine sand concrete, and the superfine sand concrete is composed of the following raw materials in parts by weight: water
Mud 280, water 100, ultra fine sand 500, stone 1100, flyash 100, high-efficiency water-reducing agent of poly-carboxylic acid 10.
Embodiment 2
The application provides a kind of superfine sand concrete, and the superfine sand concrete is composed of the following raw materials in parts by weight: water
Mud 290, water 130, ultra fine sand 520, stone 1105, flyash 105, high-efficiency water-reducing agent of poly-carboxylic acid 11.
Embodiment 3
The application provides a kind of superfine sand concrete, and the superfine sand concrete is composed of the following raw materials in parts by weight: water
Mud 300, water 170, ultra fine sand 630, stone 1170, flyash 110, high-efficiency water-reducing agent of poly-carboxylic acid 12.5.
Embodiment 4
The application provides a kind of superfine sand concrete, and the superfine sand concrete is composed of the following raw materials in parts by weight: water
Mud 300, water 170, ultra fine sand 547, stone 1116, flyash 110, high-efficiency water-reducing agent of poly-carboxylic acid 12, middle sand 137.
Optionally, the middle sand is sand in washing, and the middle grain fineness number modulus is 2.5~3.0.
Embodiment 5
The application provides a kind of superfine sand concrete, and the superfine sand concrete is composed of the following raw materials in parts by weight: water
Mud 390, water 180, ultra fine sand 690, stone 1190, flyash 118, high-efficiency water-reducing agent of poly-carboxylic acid 14, middle sand 140.
Optionally, the middle sand is sand in washing, and the middle grain fineness number modulus is 2.5~3.0.
Embodiment 6
The application provides a kind of superfine sand concrete, and the superfine sand concrete is composed of the following raw materials in parts by weight: water
Mud 2400, water 200, ultra fine sand 700, stone 1200, flyash 120, high-efficiency water-reducing agent of poly-carboxylic acid 15, middle sand 150.
Optionally, the middle sand is sand in washing, and the middle grain fineness number modulus is 2.5~3.0.
It is wherein preferred embodiment with embodiment 3 or 4.
Requirement:
The preparation of superfine sand concrete must guarantee the workability of concrete, in stirring, transport, pour, in process of vibrating,
Guarantee concrete it is uniform, not bleeding, do not isolate, be not stratified, being capable of vibration compacting.
Superfine sand concrete quality requirement: in addition to certain compression strength, also have and resist in external and concrete
The ability that portion corrodes, to freeze, melt, do, wet expansion is resisted.To mechanical wear, impact resistant etc..
Materials economy is gathered materials on the spot, materials economy when preparing superfine sand concrete, and fine aggregate uses the Northwest desert
Special fine sand reduces cement consumption to the greatest extent under the premise of meeting concrete strength requirement, while selecting other composition materials, with
Reduce Cost of Concrete.
Ultra fine sand large specific surface area, the slurry amount of required package aggregate is more in concrete, i.e., cementitious material is more.Therefore, special
The principle that fine sand concrete uses low sand coarse aggregate ratio to prepare, while the self-constriction of concrete is reduced, reduce concrete shrinkage crack.
1, cement: P.O42.5 horse racing ordinary portland cement, the determination of optimum amount.
2, ultra fine sand: 5~25mm of continuous size fraction blinding, local blinding intensity and crush index meet the requirements, faller gill
Shape < 15%.
3, additive: XLJ-1A high performance water reducing agent of polyocarboxy acid, volume: 1.0%.
4, flyash: I grades of flyash of Jing Neng power plant.
It prepares theoretical:
1, poor using low sand coarse aggregate ratio extra-heavy sand gradation, voidage is big, ultra fine sand concrete batching will be selected relative to medium coarse sand
Low sand coarse aggregate ratio, the sub- dosage relative increase of stone increase the skeleton function of coarse aggregate, increase concrete strength.
2, low-flow, coarse sand opposite compared with small slump ultra fine sand specific surface area are big, and adsorption is strong, and cohesiveness is strong,
Cement slurry is more dry thick.
Superfine sand concrete advantage；A part of fine particle in ultra fine sand may be as a part of powder, mixture
With sticking, poly- property is good, be not easy to isolate, bleeding, is easy vibration compacting.
Improve the approach of superfine sand concrete:
1, sand or stone bits in a part are added, fine aggregate grain composition and specific surface area are improved.
2, admixture, flyash, ground slag powder, silicon ash, after concrete workability and concrete hardening can be improved are added
Physical property.
3, using high efficiency water reducing agent, concrete water amount is reduced, reduces water-cement ratio.
Superfine sand concrete provided by the present application, by by cement, water, ultra fine sand, stone, flyash, polycarboxylic acids is efficient
Water-reducing agent and middle sand are mixed according to a certain percentage, due to having used ultra fine sand, before meeting concrete strength requirement
It puts, reduces cement consumption to the greatest extent, while selecting other composition materials, reduce Cost of Concrete.It gathers materials on the spot, solves resource
Problem in short supply；It is some or all of to replace sand in washing, save the cost；Improve concrete workability, is easy to pumping construction；Increase
Concrete density reduces the voids and pits in concreting process, improves concrete quality.
Although the application is described above by referring to specific embodiment, one of ordinary skill in the art are answered
Work as understanding, in principle disclosed in the present application and range, many modifications can be made for configuration disclosed in the present application and details.
The protection scope of the application is determined by the attached claims, and claim is intended to technical characteristic in claim
Equivalent literal meaning or range whole modifications for being included.
Claims (5)
1. a kind of superfine sand concrete, it is characterised in that: the superfine sand concrete is composed of the following raw materials in parts by weight: cement
280~400, water 100~200, ultra fine sand 500~700, stone 1100~1200, flyash 100~120, polycarboxylic acids efficiently subtracts
Aqua 10~15, middle sand 0~150.
2. superfine sand concrete as described in claim 1, it is characterised in that: the superfine sand concrete is by following parts by weight
Raw material composition: cement 290~390, water 130~180, ultra fine sand 520~690, stone 1105~1190, flyash 105~
118, high-efficiency water-reducing agent of poly-carboxylic acid 11~14, middle sand 0~140.
3. superfine sand concrete as claimed in claim 2, it is characterised in that: the superfine sand concrete is by following parts by weight
Raw material composition: cement 300, water 170, ultra fine sand 630, stone 1170, flyash 110, high-efficiency water-reducing agent of poly-carboxylic acid 12.5.
4. superfine sand concrete as claimed in claim 2, it is characterised in that: the superfine sand concrete is by following parts by weight
Raw material composition: cement 300, water 170, ultra fine sand 547, stone 1116, flyash 110, high-efficiency water-reducing agent of poly-carboxylic acid 12, middle sand
137。
5. superfine sand concrete as described in any one of claims 1 to 4, it is characterised in that: the middle sand is in washing
Sand, the middle grain fineness number modulus are 2.5~3.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811187692.XA CN109053090A (en) | 2018-10-10 | 2018-10-10 | A kind of superfine sand concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811187692.XA CN109053090A (en) | 2018-10-10 | 2018-10-10 | A kind of superfine sand concrete |
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| CN109053090A true CN109053090A (en) | 2018-12-21 |
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| CN201811187692.XA Pending CN109053090A (en) | 2018-10-10 | 2018-10-10 | A kind of superfine sand concrete |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112321227A (en) * | 2020-10-23 | 2021-02-05 | 华北水利水电大学 | Yellow river sand ultrahigh-performance concrete and preparation method thereof |
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| CN102060482A (en) * | 2010-11-15 | 2011-05-18 | 北京新奥混凝土集团有限公司 | Self-compacting concrete |
| CN102093001A (en) * | 2010-12-09 | 2011-06-15 | 重庆建工市政交通工程有限责任公司 | New ultrafine sand concrete |
| CN101987786B (en) * | 2009-08-07 | 2012-06-27 | 中国十五冶金建设有限公司 | Superfine sand penetration-resistant concrete |
| KR101296589B1 (en) * | 2013-01-08 | 2013-08-14 | 주식회사 삼표 | Admixture composite for secondary product of concrete |
| 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 |
| CN106167371A (en) * | 2016-06-14 | 2016-11-30 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of ultra fine sand water conservancy project large volume normal concrete |
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| CN102093001A (en) * | 2010-12-09 | 2011-06-15 | 重庆建工市政交通工程有限责任公司 | New ultrafine sand concrete |
| KR101296589B1 (en) * | 2013-01-08 | 2013-08-14 | 주식회사 삼표 | Admixture composite for secondary product of concrete |
| 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 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112321227A (en) * | 2020-10-23 | 2021-02-05 | 华北水利水电大学 | Yellow river sand ultrahigh-performance concrete and preparation method thereof |
| CN112321227B (en) * | 2020-10-23 | 2022-02-22 | 华北水利水电大学 | Yellow river sand ultrahigh-performance concrete and preparation method thereof |
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Application publication date: 20181221 |