CN103351125B - Concrete cementing material blending proportion determining method - Google Patents
Concrete cementing material blending proportion determining method Download PDFInfo
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- CN103351125B CN103351125B CN201310281395.2A CN201310281395A CN103351125B CN 103351125 B CN103351125 B CN 103351125B CN 201310281395 A CN201310281395 A CN 201310281395A CN 103351125 B CN103351125 B CN 103351125B
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Abstract
The invention particularly relates to a concrete cementing material blending proportion determining method, which solves the problem in the prior art that the construction efficiency is affected due to too long selecting and blending process, higher labor intensity and unreasonable uneconomic blending proportion during blending of concrete cementing materials. The method comprises the following steps: a, qualifying raw materials of the concrete cementing materials; b, formulating a testing program for the cementing materials and a water reducing agent; c, testing all cementing materials as per a fluidity method, and recording data; d, computing gradual loss ratio based on the recorded data; e, drawing a cementing material and water reducing agent blending amount change curve graph and a gradual loss curved graph; f, primarily determining the blending proportion of the cementing materials for the concrete; g, performing mixing test verification for the cementing materials of the concrete; h, detecting performances required by final age for the cementing materials of the concrete; i, after optimizing the proportion, performing mixing test verification for the second time; j, determining the final blending proportion of the cementing materials of the concrete. The method conveniently and quickly determines the optimal blending proportion of the cementing materials in the concrete.
Description
Technical field
The present invention relates to the determination method of material ratio, be specially a kind of defining method of concrete gel material mixture proportion.
Background technology
Known; gelling material (cement and active material adulterant) is as the chief component of modern concrete; refer to the physics chemical action by self, become in the process of hard stone shape body from plasticity-slurry, shot or bulk material bonding can be become overall material.Existing concrete gelling material mainly contains cement and flyash, slag powders, silicon ash isoreactivity mineral admixture, the size of its volume ratio, whether suitable, all produces a very large impact concrete various performance.
Pass through at present in specification or data, just according to design, the maximum or minimum amount of various gelling material in concrete is defined to concrete requirement, as for the ratio of singly mixing or mixing more active material in gelling material except cement, still more unauthoritative defining method, most of unit is in mix Design and error process, all by virtue of experience carrying out ratio-dependent, some particular problems will be there are in proportioning selected like this, as error process is long, proportioning mineral admixture mix join unreasonable, uneconomical etc., especially economical rationality is pursued meet the prerequisite of performance requriements at concrete under, need to do test complicated in a large number just can be achieved, not only increase the weight of the labour intensity of testing crew, cause the waste of certain construction cost, and need test for a long time, this long test exactly, certain unnecessary impact is brought to construction.
Summary of the invention
The present invention in order to solve existing concrete gelling material mix join have that error process is long, labour intensity is comparatively large and mix and join unreasonable, the uneconomical problem affecting operating efficiency, provides a kind of defining method of concrete gel material mixture proportion.
The present invention adopts following technical scheme to realize: the defining method of concrete gel material mixture proportion, adopt following steps: a, the starting material of concrete gel material are detected qualified; B, work out the gelling material of weight and the testing programs of different addition quantity water reducer such as some groups of different ratios starting material composition; C, according to degree of mobilization method in cement and water reducer compatibility test method, each group of gelling material to be tested, and record data; D, record data are utilized to calculate gradual loss rate; E, draw the blending of each group of list respectively and mix the graphic representation and gradual loss change curve that raw-material gelling material and water reducer volume change more; Environment residing for f, concrete gel material and construction technology, economic rationality require that combining the graphic representation drawn tentatively determines concrete gel material mixture proportion; G, carry out concrete gel material trial mix, whether the various performances of checking concrete gel material meet the demands; H, detect the performance that the final length of time requires concrete gel material; I, proportion of composing according to test-results optimised coagulation soil gelling material, then carry out trial mix checking; J, determine the final mixture proportion of concrete gel material.
The present invention adopts cement to test from the different mixture proportion of water reducer compatibility test method to concrete gel material, according to test-results, draw change curve and the gradual loss change curve of the degree of mobilization of the gelling material of different mixture proportion, tentatively determine the gelling material mixture proportion being suitable for needing, and verified by concrete trial mix, thus determine final mixture proportion and the concrete mix of gelling material, overcome existing concrete gelling material to mix and join that to there is error process long, labour intensity comparatively large and mix join unreasonable, the uneconomical problem affecting operating efficiency.
Present invention process step is simple, convenient operation and grasp, and test-results and actual compatibility are better, avoid the problem that workload is large and the test period is long that concrete gel material proportioning trial mix brings simultaneously, conveniently determine the best mixture proportion of gelling material in concrete.
Embodiment
The defining method of concrete gel material mixture proportion, adopt following steps: a, the starting material of concrete gel material are detected qualified; B, work out the gelling material of weight and the testing programs of different addition quantity water reducer such as some groups of different ratios starting material composition; C, according to degree of mobilization method in cement and water reducer compatibility test method, each group of gelling material to be tested, and record data; D, record data are utilized to calculate gradual loss rate; E, draw the blending of each group of list respectively and mix the graphic representation and gradual loss change curve that raw-material gelling material and water reducer volume change more; Environment residing for f, concrete gel material and construction technology, economic rationality require that combining the graphic representation drawn tentatively determines concrete gel material mixture proportion; G, carry out concrete gel material trial mix, whether the various performances of checking concrete gel material meet the demands; H, detect the performance that the final length of time requires concrete gel material; I, proportion of composing according to test-results optimised coagulation soil gelling material, then carry out trial mix checking; J, determine the final mixture proportion of concrete gel material.
In specific implementation process, concrete gel material comprises cement, flyash, breeze, and its various performance index etc. all meet " railway concrete engineering construction quality standard for acceptance " (TB10424-2010) requirement; Water reducer: its various performance index etc. all meet " railway concrete engineering construction quality standard for acceptance " (TB10424-2010) requirement.
Employing cement carries out following gelling material composition from water reducer compatibility test method (JC/T1083-2008) and different water reducer volume is tested.
1, gelling material ratio table composed as follows:
2, water reducer volume is respectively 0.6%, 0.8%, 1.0%, 1.2%, 1.4%, 1.6% of gelling material.
3, test-results: for selecting the index gelling material proportion of composing meeting mix-design requirement, be mainly reference by controlling concrete slump loss and water reducer the optimum mix amount, carry out compatibility test to the concrete gel material (as shown) of different ratios composition corresponding to the water reducer (0.6%, 0.8%, 1.0%, 1.2%, 1.4%, 1.6%) of obstructed volume, main experimental index has machine degree of mobilization, 60min degree of mobilization and fluidity loss etc.Test-results is added up respectively and draws degree of mobilization with gelling material and water reducer volume change curve, gradual loss is with gelling material and water reducer volume change curve, conclude the affecting laws of gelling material different ratios composition to degree of mobilization: flyash reduces with the increase of volume, slag powders increases with the increase of volume, during single fly ash when water reducer volume is larger (1.0%, 1.2%, 1.4%) degree of mobilization gradual loss increases along with the increase of volume, when singly mixing slag powders, its degree of mobilization gradual loss also increases with volume and increases, but the relative flyash of rate of loss reduces to some extent.
According to mix-design requirement, water reducer controls about 1.0%, and slump-loss 30min is advisable within remaining on 20mm, from test-results, what discovery met the demands has: single fly ash, and when water reducer volume 1.0% and 1.2%, flyash mixed weight range is 10 ~ 20%; Singly mix slag powders, during water reducer volume 1.0%, slag powders volume scope is 10 ~ 30%; Two when mixing, when water reducer volume is 1.0% and 1.2%, flyash and slag powders preferably mixture proportion are 2:1 or 1:1 or 1:2; Consider by water reducer volume be 1.0% and 1.2%, extra material is 20% and 30%, carry out proportioning checking based on fly-ash mine ground-slag ratio 2:1 and 1:1.The result of trial mix proportioning checking is seen, water reducer volume is 1.2%, when fly-ash mine ground-slag ratio is 2:1, the total volume of extra material is 30%, concrete properties all meets code requirement and economical better, but concrete strength is superpower more, again through carrying out 1.1% optimization to water reducer volume, again verify proportioning, result all meets code requirement, finally determine concrete gel material essentially consist cement: flyash: slag powders is than being 7:2:1, and the total volume of extra material is 30%.
4, the conclusion drawn: the detection method using cement and water reducer compatibility test method determination concrete gel material mixture proportion, when the concrete mix initial stage determines that gelling material ratio forms, just solve the problem in the past needed by concrete optimum determination gelling material ratio composition only by indoor slurry test (gelling material, water reducer, water), solve therefore and apolegamy time cycle of causing is long, testing crew labour intensity is large and the difficult problem needing test materials many.
Claims (1)
1. a defining method for concrete gel material mixture proportion, is characterized in that: adopt following steps: a, the starting material of concrete gel material are detected qualified; B, work out the gelling material of weight and the testing programs of different addition quantity water reducer such as some groups of different ratios starting material composition; C, according to degree of mobilization method in cement and water reducer compatibility test method, each group of gelling material to be tested, and record data; D, record data are utilized to calculate gradual loss rate; E, draw the blending of each group of list respectively and mix the graphic representation and gradual loss change curve that raw-material gelling material and water reducer volume change more; Environment residing for f, concrete gel material and construction technology, economic rationality require that combining the graphic representation drawn tentatively determines concrete gel material mixture proportion; G, carry out concrete gel material trial mix, whether the various performances of checking concrete gel material meet the demands; H, detect the performance that the final length of time requires concrete gel material; I, proportion of composing according to test-results optimised coagulation soil gelling material, then carry out trial mix checking; J, determine the final mixture proportion of concrete gel material.
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| CN107247048B (en) * | 2017-06-06 | 2020-06-30 | 济南四建（集团）有限责任公司 | Method for determining compatibility of fly ash and water reducing agent in concrete |
| CN111732383A (en) * | 2020-06-03 | 2020-10-02 | 江苏核电有限公司 | Spent fuel dry-type storage concrete and preparation method thereof |
| CN112014267A (en) * | 2020-08-28 | 2020-12-01 | 华能洛阳热电有限责任公司 | Coal fluidity detection device and detection method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101788455A (en) * | 2010-01-08 | 2010-07-28 | 东南大学 | Test method for anti-carbonation properties and content of admixtures of common Portland cement |
| CN102059741A (en) * | 2010-11-05 | 2011-05-18 | 周志涛 | Preparation method of high-performance concrete |
| CN102617055A (en) * | 2012-03-31 | 2012-08-01 | 江门市强建新型建材研发中心有限公司 | High-strength concrete multi-component cement blending process technology |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101788455A (en) * | 2010-01-08 | 2010-07-28 | 东南大学 | Test method for anti-carbonation properties and content of admixtures of common Portland cement |
| CN102059741A (en) * | 2010-11-05 | 2011-05-18 | 周志涛 | Preparation method of high-performance concrete |
| CN102617055A (en) * | 2012-03-31 | 2012-08-01 | 江门市强建新型建材研发中心有限公司 | High-strength concrete multi-component cement blending process technology |
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