CN105731934A - Concrete - Google Patents

Concrete Download PDF

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Publication number
CN105731934A
CN105731934A CN201610116299.6A CN201610116299A CN105731934A CN 105731934 A CN105731934 A CN 105731934A CN 201610116299 A CN201610116299 A CN 201610116299A CN 105731934 A CN105731934 A CN 105731934A
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CN
China
Prior art keywords
concrete
sand
machine
water
parts
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610116299.6A
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Chinese (zh)
Inventor
谯林波
邹大林
唐良昌
管富壕
刘畅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Southern Guizhou High Investment Industrial Co Ltd
Original Assignee
Southern Guizhou High Investment Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Southern Guizhou High Investment Industrial Co Ltd filed Critical Southern Guizhou High Investment Industrial Co Ltd
Priority to CN201610116299.6A priority Critical patent/CN105731934A/en
Publication of CN105731934A publication Critical patent/CN105731934A/en
Pending legal-status Critical Current

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Classifications

    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02Compositions 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
    • C04B28/04Portland cements
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/20Mortars, concrete or artificial stone characterised by specific physical values for the density
    • CCHEMISTRY; METALLURGY
    • C04CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04BLIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2201/00Mortars, concrete or artificial stone characterised by specific physical values
    • C04B2201/50Mortars, concrete or artificial stone characterised by specific physical values for the mechanical strength

Abstract

The invention discloses concrete which consists of the following raw materials mixed together in parts by mass: 250-325 parts of cement, 105-153 parts of coal ash, 0-75 parts of powdered rock phosphate, 880-1000 parts of machine-made sand, 930-990 parts of macadam, 150-160 parts of water and 7-11 parts of a water reducing agent. The concrete has the advantages that at places in shortage of river sand, the machine-made sand can be adopted to replace the river sand, the advantage that the particle size of the machine-made sand and the macadam can be adjusted is sufficiently taken, the problems that newly mixed concrete is poor in cohesiveness and water retaining property, easy to isolate, easy in water secretion, low in combination and relatively poor in flowability can be solved, the compactness, the permeation resistance and the durability of the concrete can be improved, and the environmental protection pressure can be alleviated while good economic benefits are made.

Description

A kind of concrete
Technical field
The present invention relates to concrete, the concrete that specifically a kind of using mechanism sand, flyash, ground phosphate rock produce.
Background technology
Using artificial sand (Machine-made Sand) as existing more than the 30 year history of concrete fine aggregate in American and Britain, Deng industrially developed country, in various architectural engineerings, Application comparison is general, about Machine-made Sand material and test, use standard quite perfect.And China adopts Machine-made Sand to start to walk from the sixties in 20th century in building, but the use of the natural sands such as fluvial sand, river sand is also commonplace, within 1973, National Construction Committee has held the discussion that Machine-made Sand is applied in concrete in Guizhou Province, experience exchangement by building materials industry and building industry, affirm achievement in research, and formulated " machine-made sand concrete technical regulation ".Since then, the range of application expanded of Machine-made Sand, the systems such as highway, railway, water power, metallurgy are expanded to by building trade, bridge, tunnel and hydraulic engineering is expanded to by retaining, the engineerings such as normal concrete, armored concrete, prestressed concrete, pump concrete, airtightness concrete and combined bolting and shotcrete are developed into from masonry mortar.But delayed due to the imperfection of test standard and technical specification and test material, natural sand be there is also stronger dependency by Building Trade in China, in many important feature, the use of Machine-made Sand be there is also restrictive condition.Adopting Machine-made Sand majority is the scheme done something against one's will when natural sand is under-supply or economic comparison differs greatly.
Construction is widely applied Machine-made Sand imperative: sand is the main material of concrete composition, along with construction industry development and the attention to construction engineering quality, construction market sand quantity is increasing, quality require more and more higher, and qualified natural sand resource is fewer and feweri, the construction quality thus caused, destruction farmland, water resource problem are on the rise, sand produces and also changes because of the change of resource, and the quality of building sand and quantity are day by day obvious on the impact of construction market.Admit building materials status that artificial sand is qualified and in addition specification utilizes is imperative.
Summary of the invention
The technical problem to be solved is just to provide concrete that a kind of using mechanism sand produces, low cost, high sand coarse aggregate ratio.Local in river sand shortage, employment mechanism sand substitutes, give full play to Machine-made Sand, the adjustable advantage of ballast grain sizes, solve fresh concrete cohesiveness, poor water retention property that disproportionately graded between stone and sand causes, easy isolation, bleeding, and tie low workability and the poor problem of mobility, be conducive to improving concrete density, anti-permeability performance and durability.
For achieving the above object, the present invention adopts the following technical scheme that a kind of concrete, and its raw material composition is by weight as follows:
Cement: 250~325
Flyash: 105~153
Ground phosphate rock: 0~75
Machine-made Sand: 880~1000
Rubble: 930~990
Water: 150~160
Water reducer: 7~11
Described cement is P.O42.5 cement.
Described flyash adopts second class powered coal ash.
Described breeze adopts L70 grade yellow phosphorus ground-slag.
Described ballast grain sizes 5~25mm.
Described Machine-made Sand modulus of fineness 2.7.
Described Machine-made Sand content of stone powder 14~17%.
Described water reducer is polycarboxylate high-efficiency water reducing agent.
Described rubble and Machine-made Sand carry out shaping by trimmer, material is vertically fallen in the impeller of high speed rotating by machine upper portion, under the effect of high speed centrifugation power, crush at the material generation high-speed impact of impeller surrounding with the shunting of umbrella form with another part, material, after mutual shock, can form eddy current mutual shock repeatedly with material between impeller and casing again, rub and pulverize, the straight-through discharge from bottom, controls to reach required product grading by screening plant.
Inventors have noted that: Machine-made Sand granule is multi-angular, rough surface, be conducive to and the bonding of the cementing material such as cement, be conducive to the raising of concrete strength, the shortcoming also bringing workability difference to the eye, and the stone powder in Machine-made Sand can overcome the disadvantages that this defect just.Because this stone powder is a kind of inertia admixture, fineness is little, it not only supplements the fine grained lacked in concrete, increase the surface area ratio to water volume of solid, thus decreasing bleeding and isolation, and the cementitious matter such as stone powder energy and cement and water form the slurry of softness, namely add the slurry amount of coagulation work, decrease the friction between sandstone, thus improving concrete workability.But the content of stone powder in Machine-made Sand also has certain limit, exceeding this limit, along with the increase of content of stone powder, concrete mix water consumption increases, and mixture becomes dry thick, also results in the decline of concrete cracking and intensity.The production of Machine-made Sand can be passed through to adjust the sophisticated equipment controlling production mechanism sand and technique, produces the Machine-made Sand meeting mix Design needs, and grating is reasonable, and voidage is low, it is ensured that the stability of product, and quality is easily controlled, and this is less than natural sand.Application system sand in concrete, improves and alleviates and ruin the series of environmental problems dug sand in field, reduces production cost and the building sand price of commerical ready-mixed concrete, improves construction engineering quality, reduces the pressure that building sand is nervous.Because it is remote that production mechanism of drawing materials nearby sand solves haul distance, save national resources, reduce cost, protect environment.
In recent years, Kaili City is doing peak load shifting engineering, creates substantial amounts of sandstone, but the periphery Machine-made Sand factory that to be all some small-sized, and the sandstone quality of production is unstable, and modulus of fineness is little, and clay content is high, it is difficult to meet the requirement of concrete technology development.Based on people, the understanding of Machine-made Sand is not enough and do not have corresponding technical regulation to coach, the service condition causing Machine-made Sand is bad.In the past few years substantial amounts of test has been done on the physical property of Machine-made Sand and on the impact etc. of concrete performance by the test chamber of applicant, test shows, Machine-made Sand and natural sand are from physical property to concrete performance impact is different, it is mainly reflected in: Machine-made Sand modulus of fineness is bigger than normal, when preparing high flowability weak concrete, the phenomenon such as concrete disintegration, bleeding can be caused, affect workability of concrete, when preparation plastic concrete or high flowability higher-strength concrete, on concrete properties without impact, it is equal to natural sand.For this, applicant proposes rectification scheme to sand field, passes through: selection crushing and screening shaping screening is arranged in pairs or groups again, can obtain the good sandstone of quality, it is possible to meet C60 and following concrete demand.
The present invention adopts polycarboxylate high-efficiency water reducing agent;The molecule of polycarboxylic acids (salt) water reducer artificially forms " pectination " or " dendroid " structure by " MOLECULE DESIGN ", and is connected to many side chains (side chain) having certain length and rigidity on molecular backbone.Main chain also has sulfonate or other group that cement granules can be made charged, the effect of conventional water reducing agents can be played, the more important thing is once after main chain is adsorbed on cement particle surface, side chain props up chain formation crossings on different level with other particle surface, hinder granule close to each other, thus reaching dispersion (i.e. diminishing) effect.This sterically hindered effect does not weaken with time lengthening, and therefore, the peptizaiton of polycarboxylate water-reducer is more lasting.
Rubble and Machine-made Sand that the present invention adopts carry out shaping by trimmer, material is vertically fallen in the impeller of high speed rotating by machine upper portion, under the effect of high speed centrifugation power, crush at the material generation high-speed impact of impeller surrounding with the shunting of umbrella form with another part, material is after mutually clashing into, eddy current mutual shock repeatedly can be formed with material again between impeller and casing, rub and pulverize, the straight-through discharge from bottom, control to reach required product grading by screening plant, shape of product after shaping is mostly rounded and epigranular, faller gill shape is few, it is more beneficial for improving concrete fluidity, degree of compaction and durability.
The invention solves fresh concrete cohesiveness, poor water retention property that disproportionately graded between stone and sand causes, easily isolation, bleeding, and tie low workability and the poor problem of mobility, be conducive to improving concrete density, anti-permeability performance and durability.
Detailed description of the invention
Raw-material selection:
Described ballast grain sizes is 5~25mm;Machine-made Sand modulus of fineness 2.7, content of stone powder 14~17%.Described rubble and Machine-made Sand carry out shaping by trimmer, material is vertically fallen in the impeller of high speed rotating by machine upper portion, under the effect of high speed centrifugation power, crush at the material generation high-speed impact of impeller surrounding with the shunting of umbrella form with another part, material is after mutually clashing into, eddy current mutual shock repeatedly can be formed with material again between impeller and casing, rub and pulverize, the straight-through discharge from bottom, control to reach required product grading by screening plant, shape of product after shaping is mostly rounded and epigranular, faller gill shape is few, it is more beneficial for improving concrete fluidity, degree of compaction and durability.
Described flyash adopts second class powered coal ash;Burn appropriate 5.0---6.8%, fineness 12.0---25.0%, water requirement 93---98%, activity index 70%;
Described ground phosphate rock adopts L70 grade yellow phosphorus ground-slag;
Described water reducer is polycarboxylate high-efficiency water reducing agent;The molecule of polycarboxylic acids (salt) water reducer artificially forms " pectination " or " dendroid " structure by " MOLECULE DESIGN ", and is connected to many side chains (side chain) having certain length and rigidity on molecular backbone.Main chain also has sulfonate or other group that cement granules can be made charged, the effect of conventional water reducing agents can be played, the more important thing is once after main chain is adsorbed on cement particle surface, side chain props up chain formation crossings on different level with other particle surface, hinder granule close to each other, thus reaching dispersion (i.e. diminishing) effect.This sterically hindered effect does not weaken with time lengthening, and therefore, the peptizaiton of polycarboxylate water-reducer is more lasting.
Embodiment 1: a kind of concrete, its raw material composition is respectively as follows: according to weight ratio
Cement: 260
Second class powered coal ash: 140
L70 grade yellow phosphorus ground-slag: 0
Machine-made Sand: 995
Rubble: 956
Water: 155
Water reducer: 8.99
Test its performance comparison situation in Table one embodiment 1.
Embodiment 2: a kind of concrete, its raw material composition is respectively as follows: according to weight ratio
Cement: 274
Second class powered coal ash: 147
L70 grade yellow phosphorus ground-slag: 0
Machine-made Sand: 898
Rubble: 950
Water: 160
Water reducer: 7.24
Test its performance comparison situation in Table one embodiment 2.
Embodiment 3: a kind of concrete, its raw material composition is respectively as follows: according to weight ratio
Cement: 285
Second class powered coal ash: 153
L70 grade yellow phosphorus ground-slag: 0
Machine-made Sand: 956
Rubble: 956
Water: 160
Water reducer: 10.22
Test its performance comparison situation in Table one embodiment 3.
Embodiment 4: a kind of concrete, its raw material composition is respectively as follows: according to weight ratio
Cement: 253
Second class powered coal ash: 105
L70 grade yellow phosphorus ground-slag: 63
Machine-made Sand: 985
Rubble: 946
Water: 160
Water reducer: 7.58
Test its performance comparison situation in Table one embodiment 4.
Embodiment 5: a kind of concrete, its raw material composition is respectively as follows: according to weight ratio
Cement: 322
Second class powered coal ash: 138
L70 grade yellow phosphorus ground-slag: 0
Machine-made Sand: 912
Rubble: 988
Water: 160
Water reducer: 10.48
Test its performance comparison situation in Table one embodiment 5.
Embodiment 6: a kind of concrete, its raw material composition is respectively as follows: according to weight ratio
Cement: 266
Second class powered coal ash: 111
L70 grade yellow phosphorus ground-slag: 67
Machine-made Sand: 954
Rubble: 954
Water: 160
Water reducer: 7.99
Test its performance comparison situation in Table one embodiment 6.
Embodiment 7: a kind of concrete, its raw material composition is respectively as follows: according to weight ratio
Cement: 300
Second class powered coal ash: 125
L70 grade yellow phosphorus ground-slag: 75
Machine-made Sand: 888
Rubble: 936
Water: 160
Water reducer: 9.0
Test its performance comparison situation in Table one embodiment 7.
Table one
Certainly; the present invention also has other various embodiments; when without departing substantially from present invention spirit and essence thereof, those familiar with ordinary skill in the art can make corresponding change according to the present invention, but these change in the scope of the claims that all should belong to belonging to the present invention.

Claims (9)

1. a concrete, it is characterised in that: its raw material composition is by weight as follows:
Cement: 250~325
Flyash: 105~153
Ground phosphate rock: 0~75
Machine-made Sand: 880~1000
Rubble: 930~990
Water: 150~160
Water reducer: 7~11.
2. concrete as claimed in claim 1, it is characterised in that: cement adopts P.O42.5 cement.
3. concrete as claimed in claim 1, it is characterised in that: flyash adopts second class powered coal ash;Burn appropriate 5.0-6.8%, fineness 12.0-25.0%, water requirement 93-98%, activity index 70%.
4. concrete as claimed in claim 1, it is characterised in that: ground phosphate rock adopts L70 grade yellow phosphorus ground-slag.
5. concrete as claimed in claim 1, it is characterised in that: described ballast grain sizes 5~25mm.
6. concrete as claimed in claim 1, it is characterised in that: described Machine-made Sand modulus of fineness 2.7.
7. concrete as claimed in claim 1, it is characterised in that: described Machine-made Sand content of stone powder 14~17%.
8. concrete as claimed in claim 1, it is characterised in that: described water reducer is polycarboxylate high-efficiency water reducing agent.
9. concrete as claimed in claim 1, it is characterized in that: described rubble and Machine-made Sand carry out shaping by trimmer, material is vertically fallen in the impeller of high speed rotating by machine upper portion, under the effect of high speed centrifugation power, crush at the material generation high-speed impact of impeller surrounding with the shunting of umbrella form with another part, material is after mutually clashing into, eddy current mutual shock repeatedly can be formed with material again between impeller and casing, rub and pulverize, the straight-through discharge from bottom, controls to reach required product grading by screening plant.
CN201610116299.6A 2016-03-02 2016-03-02 Concrete Pending CN105731934A (en)

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Application Number Priority Date Filing Date Title
CN201610116299.6A CN105731934A (en) 2016-03-02 2016-03-02 Concrete

Publications (1)

Publication Number Publication Date
CN105731934A true CN105731934A (en) 2016-07-06

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106278056A (en) * 2016-08-24 2017-01-04 王文明 The concrete of misfiring of using mechanism sand preparation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101164959A (en) * 2007-09-25 2008-04-23 贵州省桥梁工程总公司 Long pumping distance machine-made sand concrete
CN103288398A (en) * 2013-05-15 2013-09-11 宁波市高等级公路建设指挥部 High-performance machine-made sand marine concrete and preparation method thereof
CN103936363A (en) * 2014-03-25 2014-07-23 广西鱼峰集团有限公司 Underwater concrete containing limestone machine-made sand and preparation method thereof
CN104150840A (en) * 2014-08-19 2014-11-19 华润水泥技术研发(广西)有限公司 C60 full-manufactured sand super high-rise pump concrete

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101164959A (en) * 2007-09-25 2008-04-23 贵州省桥梁工程总公司 Long pumping distance machine-made sand concrete
CN103288398A (en) * 2013-05-15 2013-09-11 宁波市高等级公路建设指挥部 High-performance machine-made sand marine concrete and preparation method thereof
CN103936363A (en) * 2014-03-25 2014-07-23 广西鱼峰集团有限公司 Underwater concrete containing limestone machine-made sand and preparation method thereof
CN104150840A (en) * 2014-08-19 2014-11-19 华润水泥技术研发(广西)有限公司 C60 full-manufactured sand super high-rise pump concrete

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
王琪等主编: "《工业固体废物处理及回收利用》", 31 December 2006, 中国环境科学出版社 *
陈家全: "整形机制砂混凝土应用技术", 《科技创新 绿色交通——第十一次全国城市道路交通学术会议论文集》 *
雍本主编: "《特种混凝土设计与施工(第二版)》", 30 April 2005, 中国建筑工业出版社 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106278056A (en) * 2016-08-24 2017-01-04 王文明 The concrete of misfiring of using mechanism sand preparation

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Application publication date: 20160706