CN105699253A - Method for quickly identifying adaptability of concrete admixtures and additive - Google Patents
Method for quickly identifying adaptability of concrete admixtures and additive Download PDFInfo
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- CN105699253A CN105699253A CN201610003832.8A CN201610003832A CN105699253A CN 105699253 A CN105699253 A CN 105699253A CN 201610003832 A CN201610003832 A CN 201610003832A CN 105699253 A CN105699253 A CN 105699253A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
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- Chemical & Material Sciences (AREA)
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- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The invention discloses a method for quickly identifying the adaptability of concrete admixtures and an additive.The method comprises the following steps that at least two same kinds of the to-be-determined concrete admixtures are prepared; any one of the to-be-determined concrete admixtures, cement, the additive and water are mixed to obtain neat paste; values of the initial neat paste fluidity, the 0.5-h neat paste fluidity and the 1-h neat paste fluidity of the concrete admixture are determined, and the to-be-determined concrete admixture with the smaller initial neat paste fluidity, 0.5-h neat paste fluidity and 1-h neat paste fluidity is unqualified.According to the method for quickly identifying the adaptability of the concrete admixtures and the additive, the unqualified concrete admixture in multiple concrete admixtures can be quickly identified by determining and comparing the initial neat paste fluidity, the 0.5-h neat paste fluidity and the 1-h neat paste fluidity of the different concrete admixtures; the method for quickly identifying the adaptability of the concrete admixtures and the additive is simple in determining process, low in labor intensity and high in determining speed.
Description
Technical field
The present invention relates to concrete preparation field, particularly relate to a kind of Rapid identification concrete admixture and the adaptive method of additive。
Background technology
Along with the development of concrete technology, the especially fast development of GHPC application technology, the research of mineral admixture and application technology also present the good impetus。Flyash, ground slag and silicon ash etc. are widely used in scientific experiment and actual concrete works。
Actually the concrete admixture such as flyash, breeze quality is very different so that it is there is bigger difference with additive adaptability。In actual applications, the adaptability of concrete admixture and additive is determined usually by concrete optimum。When certain admixture concrete and additive bad adaptability, continue to adopt it to carry out concrete optimum and can waste more manpower, time and raw material。The defining method of the method for employing concrete optimum, stirring 20L concrete needs more raw material every time, needs the muscle power that experimenter is higher simultaneously, and test the time that needs are longer in experimentation。
Summary of the invention
Based on this, it is necessary to complicated for the adaptive method of existing Rapid identification concrete admixture and additive, the problem of experimental period length, it is provided that a kind of simple and quick Rapid identification concrete admixture and the adaptive method of additive。
A kind of Rapid identification concrete admixture and the adaptive method of additive, comprise the following steps:
(1) concrete admixture to be measured that at least two is similar is prepared。
(2) any one concrete admixture to be measured, cement, additive and water are stirred, only starched。
(3) slurry only is poured in truncated cone circle mould, the top of truncated cone circle mould is placed on flat board, after striking off along truncated cone circle mould afterbody, vertically mentions truncated cone circle mould, measure the clean slurry two vertical direction diameters at flat board after 30s, and average as initial paste flowing degree。
(4) stir 1～2 minute at clean slurry blender after the clean slurry surveying initial paste flowing degree being placed 0.5h, measure 0.5h paste flowing degree according to step (3)。
(5) 1h paste flowing degree is measured according to step (4)。
(6) the initial paste flowing degree of all the other concrete admixtures to be measured, 0.5h paste flowing degree and 1h paste flowing degree value are measured according to the method that step (2)～(5) are identical, in all concrete admixtures to be measured, initial paste flowing degree, 0.5h paste flowing degree and 1h paste flowing degree value smaller and additive bad adaptability。
Further, in step (2), additive and water add in concrete admixture to be measured, cement after preparing and stir。
Further, in step (2) concrete admixture to be measured and cement quality than for 3:6～8。
Further, in step (2) concrete admixture to be measured and cement quality than for 3:7。
Further, flat board is glass plate。
Further, the clean slurry having surveyed initial paste flowing degree is placed in beaker, and the mixing time in clean slurry blender is 1 minute。
Further, mentioning truncated cone circle mould in step (3), 30s measures the clean slurry two vertical direction diameters at flat board。
Further, concrete admixture to be measured is flyash, and additive is polycarboxylate water-reducer。
Above-mentioned Rapid identification concrete admixture and the adaptive method of additive, by measuring the initial paste flowing degree of concrete admixture not of the same race, 0.5h paste flowing degree and 1h paste flowing degree, it is compared, can disqualified concrete admixture in the multiple concrete admixture of Rapid identification。Above-mentioned Rapid identification concrete admixture and the adaptive method of additive, measure process simple, and labor intensity is low, and measuring speed is fast。
Accompanying drawing explanation
Fig. 1 is the flow chart of Rapid identification concrete admixture and the adaptive method of additive；
Fig. 2 is the paste flowing degree schematic diagram of the different phase of each flyash。
Detailed description of the invention
A kind of Rapid identification concrete admixture and the adaptive method of additive, comprise the following steps:
S100: prepare the concrete admixture to be measured that at least two is similar。
S200: any one concrete admixture to be measured, cement, additive and water are stirred, is only starched。
S300: being poured into by slurry only in truncated cone circle mould, the top of truncated cone circle mould is placed on flat board, after striking off along truncated cone circle mould afterbody, vertically mentions truncated cone circle mould, measures the clean slurry two vertical direction diameters at flat board, and average as initial paste flowing degree after 30s。
S400: stir 1～2 minute at clean slurry blender after the clean slurry surveying initial paste flowing degree is placed 0.5h, measure 0.5h paste flowing degree according to step S300。
S500: measure 1h paste flowing degree according to step S400。
S600: measure the initial paste flowing degree of all the other concrete admixtures to be measured, 0.5h paste flowing degree and 1h paste flowing degree value according to the method that step S200～S500 is identical, in all concrete admixtures to be measured, initial paste flowing degree, 0.5h paste flowing degree and 1h paste flowing degree value smaller are and additive bad adaptability。
Solidifying soil admixture quality is very different so that it is there is bigger difference with additive adaptability。The concrete admixture quality of different manufacturers is likely to there is larger difference。Therefore it is ready for the concrete admixture that each producer sells, identifies。Concrete admixture to be measured, cement, additive, water proportioning those skilled in the art can be determined according to practical situation。Clean slurry is at two vertical direction diameters of flat board, for national regulations, it is possible to be arbitrary two vertical direction on flat board。
General cement and concrete admixture is all carrying out hydration reaction, constantly consumes water, and its mobility can worse and worse, and substantially about 2h does not just have mobility, and the adaptability difference of its concrete of about 1h Yu additive may determine that out；And measure 0.5h and be because present cement maintenance effect difference all very, general about 1h is not just possessing mobility, so anti-situation of planting here substantially will measure 0.5h。
Qualification result can pass through to adjust with the concrete admixture of selected additive bad adaptability volume or the kind of additive, enable this kind of concrete admixture in use to have good mobility；Just can reduce concrete adaptive time and labor intensity。
Further, in step S200, additive and water add in concrete admixture to be measured, cement after preparing and stir。
Further, in step S200 concrete admixture to be measured and cement quality than for 3:7。
Further, in step S200 concrete admixture to be measured and cement quality than for 3:7。
Further, flat board is glass plate。The resistance of glass plate is little, and the paste flowing degree recorded is more accurate。
Further, the clean slurry having surveyed initial paste flowing degree is placed in beaker, and the mixing time in clean slurry blender is 1 minute。
Further, mentioning truncated cone circle mould in step (3), 30s measures the clean slurry two vertical direction diameters at flat board。
Further, concrete admixture to be measured is flyash, and additive is polycarboxylate water-reducer。
Embodiment
Adopt common 42.5 portland cements of Ningxiang and tri-kinds of flyash of A, B, C, differentiate the adaptability of three kinds of flyash and a kind of polycarboxylate water-reducer by experiment。The steps include:
1, concrete admixture and cement are according to 3:7 ratio, namely weigh common 42.5 portland cement 210g, the A class flyash 90g of Ningxiang and are put in the clean slurry stirring container of moistening, then add the water reducer prepared and 87g water, stir immediately。
2, glass plate is placed on horizontal level, with wet cloth, flat board, truncated cone circle mould, agitator and agitated kettle is uniformly nuzzled up so that it is surface is wet and does not drive water stain。Truncated cone circle mould is placed on the central authorities of flat board, and covers stand-by with wet cloth。The top of truncated cone circle mould is for being relatively large in diameter one end。
3, the slurry being stirred is quickly poured in truncated cone circle mould, with spatula, cement slurry is struck off, then the truncated cone is vertically quickly extracted, clean slurry is appointed to flow on a glass 30s, measure and take two vertical direction diameters of cement paste that trickling is opened, take their the meansigma methods initial paste flowing degree as cement paste。
4, the clean slurry surveying initial paste flowing degree is poured in container, pours rapidly clean slurry blender into quickly stir only starching 1 minute after 0.5h, according to step 2,3 paste flowing degree measuring its 0.5h after stirring。
5, the slurry of mensuration 0.5h paste flowing degree is measured according to step 4 paste flowing degree of 1h。
6, repeat step 1-5, weigh B class flyash, measure initial, 0.5h, 1h paste flowing degree of B class flyash。
7, repeat step 1-5, weigh C class flyash, measure initial, 0.5h, 1h paste flowing degree of C class flyash。
Specific experiment result is shown in shown in following table and Fig. 2。
C class flyash and the existing additive bad adaptability adopted can be analyzed by experimental data。
Above-mentioned Rapid identification concrete admixture and the adaptive method of additive, by measuring the initial paste flowing degree of concrete admixture not of the same race, 0.5h paste flowing degree and 1h paste flowing degree, it is compared, can disqualified concrete admixture in the multiple concrete admixture of Rapid identification。Above-mentioned Rapid identification concrete admixture and the adaptive method of additive, measure process simple, and labor intensity is low, and measuring speed is fast。
The concrete qualification process of above-described embodiment is the adaptability identifying flyash with additive (polycarboxylate water-reducer)。Other kinds of concrete admixture is similar with it with the authentication method of other types additive, repeats no more。
Embodiment described above only have expressed the several embodiments of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention。It should be pointed out that, for the person of ordinary skill of the art, without departing from the inventive concept of the premise, it is also possible to making some deformation and improvement, these broadly fall into protection scope of the present invention。Therefore, the protection domain of patent of the present invention should be as the criterion with claims。
Claims (8)
1. a Rapid identification concrete admixture and the adaptive method of additive, it is characterised in that comprise the following steps:
(1) concrete admixture to be measured that at least two is similar is prepared；
(2) any one described concrete admixture to be measured, cement, additive and water are stirred, only starched；
(3) described clean slurry is poured in truncated cone circle mould, the top of described truncated cone circle mould is placed on flat board, after striking off along described truncated cone circle mould afterbody, vertically mention described truncated cone circle mould, measure the described clean slurry two vertical direction diameters at described flat board after 30s, and average as initial paste flowing degree；
(4) stir 1～2 minute at clean slurry blender after the clean slurry surveying initial paste flowing degree being placed 0.5h, measure 0.5h paste flowing degree according to described step (3)；
(5) 1h paste flowing degree is measured according to described step (4)；
(6) the initial paste flowing degree of all the other concrete admixtures to be measured, 0.5h paste flowing degree and 1h paste flowing degree value are measured according to the method that described step (2)～(5) are identical, in all concrete admixtures to be measured, initial paste flowing degree, 0.5h paste flowing degree and 1h paste flowing degree value smaller and described additive bad adaptability。
2. Rapid identification concrete admixture according to claim 1 and the adaptive method of additive, it is characterised in that additive and water described in described step (2) add in described concrete admixture to be measured, cement after preparing and stirs。
3. Rapid identification concrete admixture according to claim 1 and the adaptive method of additive, it is characterised in that concrete admixture to be measured described in described step (2) and described cement quality ratio is for 3:6～8。
4. Rapid identification concrete admixture according to claim 2 and the adaptive method of additive, it is characterised in that concrete admixture to be measured described in described step (2) and described cement quality ratio is for 3:7。
5. Rapid identification concrete admixture according to claim 1 and the adaptive method of additive, it is characterised in that described flat board is glass plate。
6. Rapid identification concrete admixture according to claim 1 and the adaptive method of additive, it is characterised in that the described clean slurry having surveyed initial paste flowing degree is placed in beaker, and the mixing time in clean slurry blender is 1 minute。
7. the Rapid identification concrete admixture according to any one of claim 1～6 and the adaptive method of additive, it is characterized in that, mentioning described truncated cone circle mould in described step (3), 30s measures the described clean slurry two vertical direction diameters at described flat board。
8. the Rapid identification concrete admixture according to any one of claim 1～6 and the adaptive method of additive, it is characterised in that described concrete admixture to be measured is flyash, and described additive is polycarboxylate water-reducer。
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610003832.8A CN105699253A (en) | 2016-01-04 | 2016-01-04 | Method for quickly identifying adaptability of concrete admixtures and additive |
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| CN201610003832.8A CN105699253A (en) | 2016-01-04 | 2016-01-04 | Method for quickly identifying adaptability of concrete admixtures and additive |
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Cited By (4)
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| CN109085092A (en) * | 2018-08-01 | 2018-12-25 | 中铁上海工程局集团有限公司 | A method of examining flyash quality stability |
| CN109100265A (en) * | 2018-08-29 | 2018-12-28 | 山东中建西部建设有限公司 | A kind of fine aggregate is marched into the arena method for quickly detecting |
| CN110567847A (en) * | 2019-10-17 | 2019-12-13 | 贵州石博士科技有限公司 | rapid comparison test method for performance indexes of polycarboxylic acid concrete admixture |
| CN112461708A (en) * | 2020-12-11 | 2021-03-09 | 滁州中联混凝土有限公司 | Rapid approach inspection method for admixture for concrete |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109100265A (en) * | 2018-08-29 | 2018-12-28 | 山东中建西部建设有限公司 | A kind of fine aggregate is marched into the arena method for quickly detecting |
| CN109100265B (en) * | 2018-08-29 | 2021-03-02 | 山东中建西部建设有限公司 | Rapid inspection method for fine aggregate entering field |
| CN110567847A (en) * | 2019-10-17 | 2019-12-13 | 贵州石博士科技有限公司 | rapid comparison test method for performance indexes of polycarboxylic acid concrete admixture |
| CN112461708A (en) * | 2020-12-11 | 2021-03-09 | 滁州中联混凝土有限公司 | Rapid approach inspection method for admixture for concrete |
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Application publication date: 20160622 |