CN103113062B - Metamorphite machine-made sand concrete capable of inhibiting alkali activity of metamorphite aggregate and preparation method thereof - Google Patents

Metamorphite machine-made sand concrete capable of inhibiting alkali activity of metamorphite aggregate and preparation method thereof Download PDF

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Publication number
CN103113062B
CN103113062B CN201310041597.XA CN201310041597A CN103113062B CN 103113062 B CN103113062 B CN 103113062B CN 201310041597 A CN201310041597 A CN 201310041597A CN 103113062 B CN103113062 B CN 103113062B
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China
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aggregate
concrete
machine
metamorphosed rock
sand
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CN201310041597.XA
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Chinese (zh)
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CN103113062A (en
Inventor
蒋正武
邓子龙
肖鑫
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同济大学
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Abstract

The invention relates to a metamorphite machine-made sand concrete capable of inhibiting alkali activity of metamorphite aggregate, which comprises 100 parts of cement, 10-60 parts of fly ash, 0.05-0.8 part of lithium compound, 0.1-2.0 parts of silane, 0.5-4 parts of water reducing agent, 0.005-0.07 part of air entraining agent, 190-480 parts of fine aggregate, 200-480 parts of coarse aggregate and 30-80 parts of water. The preparation method comprises the following steps: after mixing the cement and silane, adding the coarse aggregate, fine aggregate, fly ash, lithium compound and air entraining agent, continuing the dry mixing, dissolving the water reducing agent in water to obtain a water solution, adding the water solution, and continuing stirring to obtain the metamorphite machine-made sand concrete. By using the metamorphite machine-made sand and metamorphite gravel as aggregate, the invention fully utilizes the environmental resources, greatly lowers the manufacturing cost of concrete engineering, and reduces the environmental load; and the prepared concrete product has obvious inhibiting effect on alkali-aggregate reaction of the metamorphite concrete with alkali activity.

Description

A kind of metamorphosed rock machine-made sand concrete that suppresses metamorphosed rock aggregate basic active and preparation method thereof
Technical field
The present invention relates to a kind of metamorphosed rock machine-made sand concrete that suppresses metamorphosed rock aggregate basic active and preparation method thereof, belong to the long-term weather resistance technology of concrete and building materials field in traffic, bridge, road engineering.
Background technology
Alkali-aggregate reaction refers in aggregate (sand, stone) that some has the mineralogical composition of basic active and reacts with the swelling property occurring between the basic solution (take KOH, NaOH as main) from the solubility of cement, admixture etc. in concrete pore, these alkaline solutions may come from this reaction and cause that volume of concrete expands and even cracking, change concrete microstructure, the mechanical properties such as concrete ultimate compression strength, folding strength, Young's modulus are obviously declined, have a strong impact on the safe handling of structure.Because alkali-aggregate reaction is generally to occur gradually after the several years after concrete formation, its result causes concrete durability to decline, and when serious, also can make concrete lose its use value.And because reaction occurs in whole inside concrete, therefore, the destruction that this reaction causes had both been difficult to prevention, was difficult to again stop, and more difficult repairing and redemption, therefore be called as concrete cancer.
Common basic active mineral mainly contain magmatite, sedimentogeneous rock and metamorphosed rock.Metamorphosed rock has very widely and distributes in China, and the 1/6 above area that especially accounts for the complete regional total area in Guizhou exists a large amount of metamorphosed rocks.This rocks contains a certain amount of microlite Yingcheng and divides and have potential alkali silicic acid activity, belongs to slow expanded polystyrene veneer reactive aggregate, therefore fail to be widely used in concrete.Guizhou province, because of the restriction of geographical environment, natural resources, can only adopt local rock aggregate and Machine-made Sand concrete batching.Along with the propelling of China's strategy to develop western regions, the infrastructure project all-round construction such as a large amount of municipal administrations, motorway, high-speed railway, need the concrete skeleton material of enormous amount, and consider to gather materials on the spot from economy, environment equal angles.From The Metamorphic Rock Area sandstone aggregate natural resources lacks more outstanding, adopts metamorphosed rock aggregate concrete batching imperative.It is significant to concrete works security, weather resistance, the reduction engineering cost of raising this area that research suppresses metamorphosed rock aggregate alkali-aggregate reaction preparation method of concrete.
Summary of the invention
The object of the invention is to for problems of the prior art, a kind of metamorphosed rock machine-made sand concrete that suppresses metamorphosed rock aggregate basic active and corresponding a kind of simple, effective preparation method are provided, and the metamorphosed rock that makes to have basic active or potential basic active can be in a large number, be widely used among concrete works.
For achieving the above object, the present invention mixes flyash by large volume when preparing metamorphosed rock concrete, reduces unit cement consumption, reduces total alkali content; Control content of stone powder in aggregate, introduce a small amount of lithium compound, suppress alkali-aggregate reaction; Mix certain air entrapment agent and silane, strengthen concrete permeability resistance and reduce concrete water-intake rate, play to a certain extent prevention and weaken the effect that alkali-aggregate reaction endangers; Optimize proportioning parameter simultaneously, prepare and can suppress the various strength grades of metamorphosed rock aggregate alkali-aggregate reaction and the metamorphosed rock machine-made sand concrete of special purpose.
The present invention is specifically achieved through the following technical solutions:
A metamorphosed rock machine-made sand concrete that suppresses metamorphosed rock aggregate basic active, comprises the component of following weight part:
100 parts of cement;
Flyash 10-60 part;
Lithium compound 0.05-0.8 part;
Silane 0.1-2.0 part;
Water reducer 0.5-4 part;
Air entrapment agent 0.005-0.07 part;
Fine aggregate 190-480 part;
Coarse aggregate 200-480 part;
Water 30-80 part.
Preferably, described cement is Portland cement or silicate cement, and strength grade is not less than 42.5.
Preferably, described flyash is second class powered coal ash or first level flour coal ash.
Preferably, described flyash is selected from first level flour coal ash, and the weight part in above-mentioned concrete is 20-45 part.
Preferably, described lithium compound is selected from LiOH, LiF and Li 2cO 3, in above-mentioned concrete, weight part is 0.05-0.3 part.
Preferably, described silane is silane powder or silane emulsion, and silane effective content should be greater than 80wt%, and in above-mentioned concrete, weight part is 0.2-1.5 part.
Preferably, described water reducer is naphthalene water reducer, and in above-mentioned concrete, weight part is 1.5-4 part; Be preferably the powder of naphthalenesulfonate formaldehyde condensation compound.
Preferred, described water reducer is poly carboxylic acid series water reducer, and solid content should be greater than 20wt%, and as horse shellfish poly carboxylic acid series water reducer, the weight part in above-mentioned concrete is 0.7-2 part.
Preferably, described air entrapment agent is lignin sulfonate air entrapment agent, and the weight part in above-mentioned concrete is 0.3-1.5 part; Be preferably calcium lignin sulphonate and sodium lignosulfonate.
Another is preferred, and described air entrapment agent is rosin tree lipid air entrapment agent, and the weight part in above-mentioned concrete is 0.005-0.01 part; Be preferably colophonium pyrolytic polymer or rosined soap.
Another is preferred, and described air entrapment agent is aliphatic alcohols air entrapment agent, and the weight part in above-mentioned concrete is 0.01-0.05 part; Be preferably the derivative system air entrapment agent of sodium alkyl sulfate air entrapment agent and high fatty alcohol.
Preferred, described air entrapment agent is alkyl salt air entrapment agent, and the weight part in described concrete is that 0.01-0.05 divides; Be preferably sodium lauryl sulphate and Sodium dodecylbenzene sulfonate.
Preferably, described fine aggregate is selected metamorphosed rock Machine-made Sand, and in metamorphosed rock Machine-made Sand, content of stone powder has larger impact to concrete alkali aggregate reaction, content of stone powder is higher, sample alkali-aggregate reaction rate of expansion is larger, and therefore, in Machine-made Sand, the content of stone flour should be controlled in 10wt%; Preferably, the weight part of described fine aggregate in above-mentioned concrete is 200-450 part.
Preferably, described coarse aggregate is selected the metamorphosed rock rubble of continuous grading, and its maximum particle diameter generally should be less than 31.5mm, and faller gill shape granule content should be less than 15wt%, and porosity should be less than 40%, and content of stone powder should be controlled in 10wt%.Preferably, the weight part of described coarse aggregate in above-mentioned concrete is 200-450 part.
The present invention further discloses above-mentioned a kind of preparation method who suppresses the metamorphosed rock machine-made sand concrete of metamorphosed rock aggregate basic active, comprise the following steps:
(1) by proportioning, take each component raw material;
(2) first by cement and silane mixture, in stirrer, stir 2-3 minute;
(3) then add coarse aggregate, fine aggregate, flyash, lithium compound and air entrapment agent, then dry mixing 1-2 minute;
(4) first that water reducer is soluble in water, then join to continue to stir in the mixture of step (3) and within 3-5 minute, obtain described a kind of metamorphosed rock machine-made sand concrete that suppresses metamorphosed rock aggregate basic active.
Technique effect of the present invention and advantage are:
1) preparation method is simple, and inhibition is remarkable.Present method can reduce 14 days rate of expansion 75~94% of mortar bars effectively, quite remarkable to the retarding effect of metamorphosed rock concrete alkali aggregate reaction.
2) adopt that metamorphosed rock is thick, fine aggregate (rubble, Machine-made Sand), take full advantage of trade waste, and can prepare by optimizing proportioning the metamorphosed rock aggregate concrete that meets various conditions.
3) adopt metamorphosed rock Machine-made Sand as concrete fine aggregate, make full use of environmental resources, significantly reduce concrete works cost, shorten the duration of a project, alleviate carrying capacity of environment.The engineering project in rock area can be gathered materials on the spot on the turn, thereby reduces starting material transportation, storage cost and time, also can alleviate the environmental disruption bringing because of raw-material long-distance transport.
Embodiment
By specific specific examples, technical scheme of the present invention is described below.Should be understood that one or more method stepss that the present invention mentions do not repel between the step that also has additive method step or clearly mention at these before and after described combination step can also insert additive method step; Should also be understood that these embodiment are only not used in and limit the scope of the invention for the present invention is described.And, except as otherwise noted, the numbering of various method steps is only for differentiating the convenient tool of various method steps, but not for limiting the ordering of various method steps or limiting the enforceable scope of the present invention, the change of its relativeness or adjustment, without essence change technology contents in the situation that, when being also considered as the enforceable category of the present invention.
Embodiment 1
Prepare certain engineering Bridge, roadbed, tunnel, C25 metamorphosed rock aggregate machine-made sand concrete batching for Culvert engineering:
Flyash: second class powered coal ash;
Water reducer: horse shellfish polycarboxylate water-reducer, solid content is greater than 20wt%;
Air entrapment agent: Sodium dodecylbenzene sulfonate;
Coarse aggregate: the metamorphosed rock rubble of continuous grading, its maximum particle diameter is 30mm, and faller gill shape granule content is 11.2wt%, and porosity is 29%, and content of stone powder is 7.3wt%;
Fine aggregate: metamorphosed rock Machine-made Sand, wherein content of stone powder is 7.3wt%.
Cement: Wumeng Shan Mountain P.O42.5 cement;
Lithium compound: LiOH;
Silane powder;
Water;
Table 1C25 metamorphosed rock aggregate machine-made sand concrete proportioning
Preparation process is: (1) takes each component raw material by proportioning; (2), by cement and silane mixture, in stirrer, stir 2-3 minute; (3) then add coarse aggregate, fine aggregate, flyash, lithium compound and air entrapment agent, then dry mixing 1-2 minute; (4) first that water reducer is soluble in water, then join and in the mixture of step (3), continue to stir a kind of metamorphosed rock machine-made sand concrete that suppresses metamorphosed rock aggregate basic active that obtains the present embodiment for 3-5 minute.
And prepare benchmark test specimen: use cement, coarse aggregate and fine aggregate and water reducer in above-mentioned batching, the cement products making by identical proportioning simultaneously.
Adopt American Society Testing and Materials's standard (ASTM C1260 standard) test, the present embodiment concrete 14d mortar bars rate of expansion is 0.067%, compared with benchmark test specimen rate of expansion, has reduced by 85.2%.
Embodiment 2
Prepare certain engineering Bridge, roadbed, tunnel, C30 metamorphosed rock aggregate machine-made sand concrete batching for Culvert engineering:
Flyash: second class powered coal ash;
Water reducer: horse shellfish polycarboxylate water-reducer, solid content is greater than 20wt%;
Air entrapment agent: rosin soap air-entraining agent;
Coarse aggregate: the metamorphosed rock rubble of continuous grading, its maximum particle diameter is 30mm, and faller gill shape granule content is 11.2wt%, and porosity is 29%, and content of stone powder is 7.3wt%
Fine aggregate: metamorphosed rock Machine-made Sand, wherein content of stone powder is 7.3wt%;
Lithium compound: Li 2cO 3;
Cement: Ruian, Kerry P.O42.5 cement;
Silane emulsion; Water;
Table 2 C30 metamorphosed rock aggregate Machine-made Sand underwater concrete proportioning
Preparation process is with embodiment 1.While preparation standard test specimen: with cement, coarse aggregate and fine aggregate and water reducer in the present embodiment batching, the cement products making by identical proportioning.
Adopt American Society Testing and Materials's standard (ASTM C1260 standard) test, the present embodiment concrete 14d mortar bars rate of expansion is 0.070%, compared with benchmark test specimen rate of expansion, has reduced by 77.5%.
Embodiment 3
Prepare certain engineering Bridge, roadbed, tunnel, C30 metamorphosed rock aggregate Machine-made Sand pump concrete batching for Culvert engineering:
Flyash: second class powered coal ash;
Water reducer: horse shellfish polycarboxylate water-reducer, solid content is greater than 20wt%;
Air entrapment agent: sodium lauryl sulphate;
Coarse aggregate: the metamorphosed rock rubble of continuous grading, its maximum particle diameter is 30mm, and faller gill shape granule content is 11.2wt%, and porosity is 29%, and content of stone powder is 7.3wt%;
Fine aggregate: metamorphosed rock Machine-made Sand, wherein content of stone powder is 7.3wt%;
Lithium compound: Li 2cO 3;
Cement: Ruian, Kerry P.O42.5 cement;
Silane powder; Water;
Table 3 C30 metamorphosed rock aggregate proportion of machine pump concrete
Preparation process is with embodiment 1.While preparation standard test specimen: with cement, coarse aggregate and fine aggregate and water reducer in the present embodiment batching, the cement products making by identical proportioning.
Adopt American Society Testing and Materials's standard (ASTM C1260 standard) test, 14d mortar bars rate of expansion is 0.081%, compared with benchmark test specimen rate of expansion, has reduced by 79.8%.
Embodiment 4
Prepare C40 metamorphosed rock aggregate Machine-made Sand pump concrete batching for certain engineering Bridge engineering:
Flyash: first level flour coal ash;
Water reducer: horse shellfish polycarboxylate water-reducer, solid content is greater than 20wt%;
Air entrapment agent: sodium alkyl sulfate air entrapment agent;
Coarse aggregate: the metamorphosed rock rubble of continuous grading, its maximum particle diameter is 30mm, and faller gill shape granule content is 11.2wt%, and porosity is 29%, and content of stone powder is 7.3wt%;
Fine aggregate: metamorphosed rock Machine-made Sand, wherein content of stone powder is 7.3wt%;
Lithium compound: LiF.
Cement: Ruian, Kerry P.O42.5 cement;
Silane emulsion; Water;
Table 4 C40 metamorphosed rock aggregate proportion of machine pump concrete
Preparation process is with embodiment 1.While preparation standard test specimen: with cement, coarse aggregate and fine aggregate and water reducer in the present embodiment batching, the cement products making by identical proportioning.
Adopt American Society Testing and Materials's standard (ASTM C1260 standard) test, 14d mortar bars rate of expansion is 0.077%, compared with benchmark test specimen rate of expansion, has reduced by 82%.

Claims (8)

1. a metamorphosed rock machine-made sand concrete that suppresses metamorphosed rock aggregate basic active, comprises the component of following weight part:
Described fine aggregate is selected metamorphosed rock Machine-made Sand, and in Machine-made Sand, the content of stone flour is controlled in 10wt%;
Described coarse aggregate is selected the metamorphosed rock rubble of continuous grading, and maximum particle diameter is less than 31.5mm, and faller gill shape granule content is less than 15wt%, and porosity is less than 40%, and content of stone powder is controlled in 10wt%.
2. metamorphosed rock machine-made sand concrete as claimed in claim 1, is characterized in that, described cement is Portland cement or silicate cement, and strength grade is not less than 42.5.
3. metamorphosed rock machine-made sand concrete as claimed in claim 1, is characterized in that, described flyash is second class powered coal ash or first level flour coal ash.
4. metamorphosed rock machine-made sand concrete as claimed in claim 1, is characterized in that, described lithium compound is selected from LiOH, LiF and Li 2cO 3.
5. metamorphosed rock machine-made sand concrete as claimed in claim 1, is characterized in that, described silane is silane powder or silane emulsion, and silane effective content is greater than 80wt%.
6. metamorphosed rock machine-made sand concrete as claimed in claim 1, is characterized in that, described water reducer is naphthalene water reducer or poly carboxylic acid series water reducer.
7. metamorphosed rock machine-made sand concrete as claimed in claim 1, is characterized in that, described air entrapment agent is lignin sulfonate air entrapment agent, rosin tree lipid air entrapment agent, aliphatic alcohols air entrapment agent and alkyl salt air entrapment agent.
8. the preparation method of the metamorphosed rock machine-made sand concrete as described in as arbitrary in claim 1-7, comprises the following steps:
(1) by proportioning, take each component raw material;
(2) first by cement and silane mixture, in stirrer, stir 2-3 minute;
(3) then add coarse aggregate, fine aggregate, flyash, lithium compound and air entrapment agent, then dry mixing 1-2 minute;
(4) first that water reducer is soluble in water, then add to continue to stir in the mixture of step (3) within 3-5 minute, to obtain described a kind of metamorphosed rock machine-made sand concrete that suppresses metamorphosed rock aggregate basic active.
CN201310041597.XA 2013-02-01 2013-02-01 Metamorphite machine-made sand concrete capable of inhibiting alkali activity of metamorphite aggregate and preparation method thereof CN103113062B (en)

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CN103601386A (en) * 2013-11-11 2014-02-26 周兆弟 Aggregate for concrete with strength grade more than 20C
CN103992052A (en) * 2014-05-17 2014-08-20 安徽水利开发股份有限公司 Method for inhibiting alkali activity of cement concrete
CN107473674B (en) * 2017-10-12 2020-05-15 贺州学院 High-temperature-resistant water pipe and preparation method thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1699244A (en) * 2005-04-30 2005-11-23 南京师范大学 Multifunctional chlorine-free alkali-free compound concrete slag admixture and its preparation process
CN102173684A (en) * 2011-01-28 2011-09-07 青岛理工大学 Concrete prepared from tunnel waste slag and mineral admixture with large mixing amount and preparation method thereof
CN102531458A (en) * 2010-12-09 2012-07-04 苏笮斌 Anti-crack and anti-corrosion plasticizer composition and preparation method thereof
CN102584085A (en) * 2012-03-05 2012-07-18 刘福战 Special additive for inhibiting concrete alkali-aggregate reaction
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1699244A (en) * 2005-04-30 2005-11-23 南京师范大学 Multifunctional chlorine-free alkali-free compound concrete slag admixture and its preparation process
CN102531458A (en) * 2010-12-09 2012-07-04 苏笮斌 Anti-crack and anti-corrosion plasticizer composition and preparation method thereof
CN102173684A (en) * 2011-01-28 2011-09-07 青岛理工大学 Concrete prepared from tunnel waste slag and mineral admixture with large mixing amount and preparation method thereof
CN102584085A (en) * 2012-03-05 2012-07-18 刘福战 Special additive for inhibiting concrete alkali-aggregate reaction
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

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