CN104891908A - C60 micro-expansive and self-compacted concrete - Google Patents

C60 micro-expansive and self-compacted concrete Download PDF

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Publication number
CN104891908A
CN104891908A CN201510190599.4A CN201510190599A CN104891908A CN 104891908 A CN104891908 A CN 104891908A CN 201510190599 A CN201510190599 A CN 201510190599A CN 104891908 A CN104891908 A CN 104891908A
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China
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rubble
concrete
sand
mixed sand
self
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CN201510190599.4A
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胡源
顾奎
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China MCC17 Group Co Ltd
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China MCC17 Group Co Ltd
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Priority to CN201510190599.4A priority Critical patent/CN104891908A/en
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Abstract

The present invention discloses a C60 micro-expansive and self-compacted concrete, and belongs to the technical field of building materials. The C60 micro-expansive and self-compacted concrete comprises, by mass, 15.9-16.5% of cement, 34.8-37.0% of crushed stone, 32.3-34.2% of mixed sand, 6.4-6.6% of drinking water, 6.6-6.8% of an admixture and 1.0-1.1% of an additive, wherein the admixture is fly ash, ore powder and silicon powder, the additive is a contraction compensating micro-expansive agent and a pumping agent, the mixed sand comprises medium sand and machine-made sand, and the crushed stone comprises small particle size crushed stone and large particle size crushed stone. According to the present invention, the concrete preparation process is simple, the concrete has characteristics of stable quality and less defect, the cement consumption is reduced, the fly ash, the ore powder and the silicon powder in the used components are the industrial waste, and the reference significance is provided for preparation of the high strength concrete having other grades.

Description

A kind of C60 microdilatancy self-compacting concrete
Technical field
The invention belongs to building material technical field, be specifically related to a kind of C60 microdilatancy self-compacting concrete, this microdilatancy self-compacting concrete while guarantee concrete strength, can reduce the generation of construction accident.
Background technology
Along with deepening continuously of domestic Urbanization Construction, large-scale development is all being carried out in each city, but be limited to the scarcity of land resources, each city is on the middle and senior level and high-rise building more and more, and in structure like such, design adopts Structural Steel Reinforced Concrete more, partial design adopts Steel Cylindrical Column Inner to fill with the frame mode of High-strength self-compaction concrete, can predict, along with being on the increase of domestic Highrise buildings, the application of High-strength self-compaction concrete will be more and more general.The present invention improves the construction quality of C60 High-strength self-compaction concrete by suitably mixing appropriate micro-expanding agent while combined addition silica flour, breeze, make its shaping rear steady quality, structural safety, simultaneously for the high-strength concrete of other label provides Technical Reference.
Summary of the invention
The object of the present invention is to provide a kind of C60 microdilatancy self-compacting concrete, this C60 microdilatancy self-compacting concrete, on the basis of preparing burden in conjunction with traditional C 60 High-strength self-compaction concrete proportioning, is prepared by mixing the mode of breeze, silica flour, Machine-made Sand and micro-expanding agent again.
A kind of C60 microdilatancy self-compacting concrete provided by the present invention, this concrete comprises cement, rubble, mixed sand, tap water, adulterant and admixture; Described each component percent mass proportioning is: cement 15.9% ~ 16.5%, mixed sand 32.3% ~ 34.2%, rubble 34.8% ~ 37.0%, adulterant 6.6% ~ 6.8%, tap water 6.4% ~ 6.6%, admixture 1.0 ~ 1.1%.
Described adulterant is flyash, breeze and silica flour, the specification of quality of described flyash, breeze and silica flour only need meet national respective standard, and the mass ratio of described cement and described flyash, breeze and silica flour is 1:0.25:0.1:0.0625 (cement: flyash: breeze: silica flour).
Described admixture is the micro-swelling agent of compensate for shrinkage and pumping agent, and the mass ratio of the micro-swelling agent of described cement, compensate for shrinkage, pumping agent is 1:0.05:0.41 (cement: swelling agent: pumping agent).
Described mixed sand is the mixed sand that medium sand and Machine-made Sand form, the fineness modulus of described mixed sand is 2.3 ~ 3.0, in described mixed sand, silt content is not more than 2wt%, in described mixed sand, clod content is not more than 0.5wt%, in described mixed sand, content of stone powder is not more than 2wt%, and in described mixed sand, Machine-made Sand mass ratio is 35.2% ~ 37.5%.
Described rubble is made up of Large stone rubble two kinds of rubbles of particle diameter to be the small particle size rubble of 5mm ~ 10mm and particle diameter be 10mm ~ 16mm, in described rubble, pin, platy shaped particle content are not more than 8wt%, in described rubble, silt content is not more than 0.5wt%, in described rubble, clod content is not more than 0.2wt%, described rubble medium sulphide content and sulphate content sum are not more than 1wt%, and the medium and small Stone of described rubble and the quality of Large stone rubble are admixed than being 1:4.7.
Concrete preparation method is as follows for C60 microdilatancy self-compacting concrete provided by the present invention: according to the proportioning determined, first the rubble of two kinds of different-grain diameters and mixed sand is carried out mechanically mixing according to the ratio determined, ensures to stir; Then add in the mixing vessel of concrete batching according to the order of rubble, mixed sand, flyash, breeze, silica flour and cement successively, finally admixture is blended in water, after stirring, be poured in the mixing vessel of concrete batching; Churning time is 150 ~ 180s, even to guarantee various batching abundant mix in stirrer, finally completes the preparation of C60 microdilatancy self-compacting concrete.
C60 microdilatancy self-compacting concrete prepared by invention, ensure that concrete shaping strength is compared with the workability of work with traditional C 60 High-strength self-compaction concrete proportioning by the consumption suitably increasing cement consumption and flyash, the present invention is on the basis of preparing burden in conjunction with traditional C 60 High-strength self-compaction concrete proportioning, the creationary mode by mixing breeze, silica flour, Machine-made Sand and micro-expanding agent again, to overcome in traditional High-strength self-compaction concrete proportioning cement consumption large, the shortcoming of the high and shaping rear easy generation shrinkage crack of cost.
Concrete preparation process of the present invention is easy, and the concrete quality after shaping is stable, defect is few, and decreases cement consumption in preparation, and cost is low.The batching simultaneously used in batching is all industrial waste as flyash, breeze, silica flour, and belong to waste material recycling, meet national green industry and scientific development policy requirements, the present invention has reference to the preparation of the high-strength concrete of other label simultaneously.
Embodiment
The invention provides a kind of C60 microdilatancy self-compacting concrete, table 1 has listed a kind of concrete proportioning of C60 self-compacting slightly expanded concrete.
Table 1 C60 self-compacting slightly expanded concrete proportioning (kg/m 3)
In advance according to the working sources condition of construction periphery, selecting the related raw material meeting national standard, guaranteeing that often kind of raw material reaches the concrete technical requirements of configuration by rechecking.Then traditional concrete batching is used to comprise cement, stone, medium sand, flyash and tap water, first by the appropriate rational gradation composition increasing Machine-made Sand adjustment medium sand, reduce the silt content in nature medium sand simultaneously, then according to concrete requirement of strength, appropriate increase silica flour, by the increase of silica flour, reduces the consumption of cement in folk prescription concrete, thus reach reduction hydration heat of cement, thus from avoiding producing concrete shrinkage crack on the one hand.Then according to the requirement of concrete self compacting ability, mix breeze again in right amount, the flyash one of admixture in itself and traditional concrete mix is worked, increase the workability in concrete construction.Finally for ensureing the microfracture reducing C60 High-strength self-compaction concrete inside to greatest extent, admixture compensate for shrinkage micro-expanding agent in batching, avoids concrete subsurface defect further.According to the concrete raw material selected, by experiment repeatedly, the consumption of the various batching of adjustment concrete, finally determines a kind of stable, the grade that Forming Quality meets design requirement.This concrete is planned to be applied to Yinchuan on a large scale and is read the five-star project of bay platinum, the prefabricated components in early stage, meets design and code requirement through annex.
The serviceability of C60 self-compacting slightly expanded concrete provided by the present invention is shown in Table 2.
The serviceability of table 2 C60 self-compacting slightly expanded concrete
The fundamental property of C60 self-compacting slightly expanded concrete provided by the present invention is shown in Table 3.
The fundamental property of table 3 C60 self-compacting slightly expanded concrete

Claims (3)

1. a C60 microdilatancy self-compacting concrete, is characterized in that this concrete comprises cement, rubble, mixed sand, tap water, adulterant and admixture; Described each component percent mass proportioning is: cement 15.9% ~ 16.5%, mixed sand 32.3% ~ 34.2%, rubble 34.8% ~ 37.0%, adulterant 6.6% ~ 6.8%, tap water 6.4% ~ 6.6%, admixture 1.0 ~ 1.1%; Described adulterant is flyash, breeze and silica flour, and the mass ratio of described cement and described flyash, breeze and silica flour is 1:0.25:0.1:0.0625; Described admixture is the micro-swelling agent of compensate for shrinkage and pumping agent, and the mass ratio of the swelling agent that described cement, compensate for shrinkage are micro-and pumping agent is 1:0.05:0.41.
2. a kind of C60 microdilatancy self-compacting concrete according to claim 1, it is characterized in that described mixed sand is the mixed sand that medium sand and Machine-made Sand form, the fineness modulus of described mixed sand is 2.3 ~ 3.0, in described mixed sand, silt content is not more than 2wt%, in described mixed sand, clod content is not more than 0.5wt%, in described mixed sand, content of stone powder is not more than 2wt%, and in described mixed sand, Machine-made Sand mass ratio is 35.2% ~ 37.5%.
3. a kind of C60 microdilatancy self-compacting concrete according to claim 1, it is characterized in that described rubble is made up of Large stone rubble two kinds of rubbles of particle diameter to be the small particle size rubble of 5mm ~ 10mm and particle diameter be 10mm ~ 16mm, in described rubble, pin, platy shaped particle content are not more than 8wt%, in described rubble, silt content is not more than 0.5wt%, in described rubble, clod content is not more than 0.2wt%, described rubble medium sulphide content and sulphate content sum are not more than 1wt%, and the medium and small Stone of described rubble and the quality of Large stone rubble are admixed than being 1:4.7.
CN201510190599.4A 2015-04-21 2015-04-21 C60 micro-expansive and self-compacted concrete Pending CN104891908A (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106082834A (en) * 2016-06-06 2016-11-09 江苏科技大学 A kind of C60 machine-made sand concrete and preparation method thereof
CN106316241A (en) * 2016-08-03 2017-01-11 中交三公局(北京)工程试验检测有限公司 Self-compacting micro-expansion concrete and preparation method thereof
CN106747087A (en) * 2016-12-07 2017-05-31 沧州市牧疆南北农牧机械有限公司 Plant concrete prefabricated plate prescription and preparation method
CN106977155A (en) * 2017-04-13 2017-07-25 天津金隅混凝土有限公司 C60 ultra-high pump concretes
CN107311567A (en) * 2017-07-13 2017-11-03 武汉大学 Self-compaction seif-citing rate Self-curing high-strength concrete and preparation method thereof
CN107572957A (en) * 2017-09-15 2018-01-12 广西路桥工程集团有限公司 A kind of self-compaction non-shrinking steel pipe concrete
CN107777961A (en) * 2016-08-31 2018-03-09 北京市第五建筑工程集团有限公司 It is easy to the High-strength self-compaction concrete of super high-rise pumping
CN108715521A (en) * 2018-05-22 2018-10-30 暨南大学 A kind of composite blend containing flyash and slag powders and the high-strength concrete using its preparation

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102503262A (en) * 2011-10-19 2012-06-20 合肥天柱包河特种混凝土有限公司 Self-compacting concrete and design method of mixing proportion thereof

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102503262A (en) * 2011-10-19 2012-06-20 合肥天柱包河特种混凝土有限公司 Self-compacting concrete and design method of mixing proportion thereof

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106082834A (en) * 2016-06-06 2016-11-09 江苏科技大学 A kind of C60 machine-made sand concrete and preparation method thereof
CN106316241A (en) * 2016-08-03 2017-01-11 中交三公局(北京)工程试验检测有限公司 Self-compacting micro-expansion concrete and preparation method thereof
CN107777961B (en) * 2016-08-31 2020-07-03 北京市第五建筑工程集团有限公司 High-strength self-compacting concrete easy for super high-rise pumping
CN107777961A (en) * 2016-08-31 2018-03-09 北京市第五建筑工程集团有限公司 It is easy to the High-strength self-compaction concrete of super high-rise pumping
CN106747087A (en) * 2016-12-07 2017-05-31 沧州市牧疆南北农牧机械有限公司 Plant concrete prefabricated plate prescription and preparation method
CN106977155B (en) * 2017-04-13 2020-01-10 天津金隅混凝土有限公司 C60 super high pumping concrete
CN106977155A (en) * 2017-04-13 2017-07-25 天津金隅混凝土有限公司 C60 ultra-high pump concretes
CN107311567A (en) * 2017-07-13 2017-11-03 武汉大学 Self-compaction seif-citing rate Self-curing high-strength concrete and preparation method thereof
CN107572957A (en) * 2017-09-15 2018-01-12 广西路桥工程集团有限公司 A kind of self-compaction non-shrinking steel pipe concrete
CN108715521A (en) * 2018-05-22 2018-10-30 暨南大学 A kind of composite blend containing flyash and slag powders and the high-strength concrete using its preparation

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