CN106746842A - A kind of concrete viscosity conditioning agent - Google Patents
A kind of concrete viscosity conditioning agent Download PDFInfo
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- CN106746842A CN106746842A CN201510807406.5A CN201510807406A CN106746842A CN 106746842 A CN106746842 A CN 106746842A CN 201510807406 A CN201510807406 A CN 201510807406A CN 106746842 A CN106746842 A CN 106746842A
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Abstract
The invention provides a kind of concrete viscosity conditioning agent, it is related to technical field of concrete additives, the weight proportion of its component is：Triisopropanolamine 5.5%, NaOH 2.5%, the calcium oxide 13% of 8000 mesh, the flyash 24% of 400 mesh, the bentonite 8% of 300 mesh.Viscosity modifier of the invention is added toward concrete can effectively reduce concrete viscosity, and be not in the situation of concrete strength reduction.
Description
Technical field
The present invention relates to technical field of concrete additives, more particularly to a kind of concrete viscosity conditioning agent.
Background technology
As civil engineering scale constantly expands, scientific and technological level is improved constantly, some high-rise long spans, have specific function requirement Important building emergence, such as construction of skyscraper, super-span bridge and huge water-control project, it is required that concrete must have intensity higher, more preferable durability, more excellent stability, these demands facilitate concrete from commonly progressively developing to high-performance or even very-high performance direction.The raising of concrete strength mainly realizes that this is also resulted in, and concrete viscosity is larger, and a series of construction problem such as initiation concrete-agitating, transport, pumping largely limits the popularization and application of high-strength shale ceramsite by reducing water-cement ratio.Particularly super high strength concrete high-strength at present is essentially available for prefabricated components, and the application example of large scale structure engineering does not have also substantially, let alone pumping construction.
How concrete viscosity key issue as high-strength shale ceramsite development is reduced.From the point of view of the composition and preparation method of high-strength shale ceramsite, current adoptable viscosity reducing process is mainly to be carried out in terms of organic admixture and admixture two.But it is still unintelligible to the concrete viscosity mechanism of action on water reducer, the research and development of organic thinner do not occur the Patents of the organic thinner of concrete also at present still without breakthrough；And admixture aspect is also without there is patent on concrete thinner or article, presently mainly improve working performance of concrete by mixing a large amount of flyash, it is known that mixing flyash can reduce concrete viscosity but larger to the intensity effect of concrete, it is for high-strength or ultra-high performance concrete intensity lifting totally unfavorable, therefore need the new viscosity modifier of development function admirable badly and reduce high-strength or super high strength concrete viscosity.
The content of the invention
The technical problem to be solved in the present invention is to provide and a kind of can reduce high-strength or super high strength concrete viscosity and not influence the concrete viscosity conditioning agent of concrete strength.
In order to solve the above-mentioned technical problem, the present invention is adopted the following technical scheme that：A kind of concrete viscosity conditioning agent, the weight proportion of its component is：Triisopropanolamine 5.5%, NaOH 2.5%, the calcium oxide 13% of 8000 mesh, the flyash 35% of 400 mesh, the bentonite 15% of 500 mesh, the silicate powder of balance of 5000 mesh.
The present invention obtain beneficial effect be：Viscosity modifier of the invention is added toward concrete can effectively reduce concrete viscosity, and be not in the situation of concrete strength reduction.
Specific embodiment
As one embodiment of the present invention, a kind of concrete viscosity conditioning agent, the weight proportion of its component is：Triisopropanolamine 5.5%, NaOH 2.5%, the calcium oxide 13% of 8000 mesh, the flyash 35% of 400 mesh, the bentonite 15% of 500 mesh, the silicate powder of balance of 5000 mesh.
Concrete viscosity conditioning agent is obtained according to said ratio, hereafter, with the concrete viscosity conditioning agent for obtaining, concrete viscosity and compression strength contrast test is carried out.Concrete viscosity can then be reacted by V funnels by the time, and more long by the time, concrete viscosity is bigger.Concrete crushing strength experiment is with reference to GB8076-2008《Concrete admixture》, experiment concrete matched ratio of mud W/C=0.29,20 DEG C of experimental temperature.Result of the test is as follows：
The concrete each component weight proportion that experiment is used：The weight portion of cement 32, the weight portion of river sand 73, the weight portion of handstone 33 of 0.3-0.8 centimetres of diameter, the weight portion of middle stone 44 of 1-1.5 centimetres of diameter, the weight portion of big stone 33 of 1.8-2.4 centimetres of diameter.
In the contrast test of concrete viscosity and compression strength, the adding proportion of polycarboxylate water-reducer is 1%, and the adding proportion of concrete viscosity conditioning agent is 8%（Weight ratio）.
Concrete viscosity contrast test result is：Under equal conditions（Test that the concrete total amount used is identical and experiment is so V funnels are for same）, when being not added with concrete viscosity conditioning agent, the time that concrete passes through V funnels is 35 seconds；After addition concrete viscosity conditioning agent, the time that concrete passes through V funnels is 22 seconds, it can be seen that, after addition concrete viscosity conditioning agent, concrete is shortened 13 seconds by the time of V funnels, and concrete viscosity reduces about 37%.
Compression strength contrast test result is：In the case where concrete viscosity conditioning agent is not added with, 40.4 MPas of concrete seven d intensity, 60.2 MPas of 28d intensity, after addition concrete viscosity conditioning agent, 40.2 MPas of concrete seven d intensity, 60.5 MPas of 28d intensity.The reason for considering test error, by the above results it was determined that not resulting in the intensity decreases of concrete after adding the concrete viscosity conditioning agent, its influence to concrete strength can be ignored.
Above-described embodiment is the present invention preferably implementation, and in addition, the present invention can be realized with other manner, and any obvious replacement is within protection scope of the present invention on the premise of the technical program design is not departed from.
Finally, it should be emphasized that, in order to allow those of ordinary skill in the art more easily to understand improvements of the present invention relative to prior art, some descriptions of the invention have been simplified, and for the sake of clarity, present specification is omitted some other elements, and those of ordinary skill in the art should be aware that these elements for omitting also may make up present disclosure.
Claims (1)
1. a kind of concrete viscosity conditioning agent, the weight proportion of its component is：Triisopropanolamine 5.5%, NaOH 2.5%, the calcium oxide 13% of 8000 mesh, the flyash 35% of 400 mesh, the bentonite 15% of 500 mesh, the silicate powder of balance of 5000 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510807406.5A CN106746842A (en) | 2015-11-20 | 2015-11-20 | A kind of concrete viscosity conditioning agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510807406.5A CN106746842A (en) | 2015-11-20 | 2015-11-20 | A kind of concrete viscosity conditioning agent |
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| Publication Number | Publication Date |
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| CN106746842A true CN106746842A (en) | 2017-05-31 |
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| CN201510807406.5A Pending CN106746842A (en) | 2015-11-20 | 2015-11-20 | A kind of concrete viscosity conditioning agent |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102459115A (en) * | 2009-06-05 | 2012-05-16 | 格雷斯公司 | Cementitious foams and foam slurries |
| CN103145360A (en) * | 2013-03-01 | 2013-06-12 | 江苏博特新材料有限公司 | Viscosity modifier for high or ultrahigh-strength concrete |
| CN104402337A (en) * | 2014-11-20 | 2015-03-11 | 中国铁道科学研究院铁道建筑研究所 | Preparation and application of dry-mixed mortar for plate-type ballastless track self-compacting concrete |
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2015
- 2015-11-20 CN CN201510807406.5A patent/CN106746842A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102459115A (en) * | 2009-06-05 | 2012-05-16 | 格雷斯公司 | Cementitious foams and foam slurries |
| CN103145360A (en) * | 2013-03-01 | 2013-06-12 | 江苏博特新材料有限公司 | Viscosity modifier for high or ultrahigh-strength concrete |
| CN104402337A (en) * | 2014-11-20 | 2015-03-11 | 中国铁道科学研究院铁道建筑研究所 | Preparation and application of dry-mixed mortar for plate-type ballastless track self-compacting concrete |
Non-Patent Citations (3)
| Title |
|---|
| 严捍东等: "《新型建筑材料教程》", 31 January 2005 * |
| 史建峰: ""膨润土的性质及其对水泥浆溶液的影响"", 《山西建筑》 * |
| 李国华等: ""三异丙醇胺对水泥抗压强度的影响"", 《建材发展导向（下）》 * |
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Application publication date: 20170531 |