CN1033246C - Method and equipment for quick test of concrete proportioning - Google Patents
Method and equipment for quick test of concrete proportioning Download PDFInfo
- Publication number
- CN1033246C CN1033246C CN 91111801 CN91111801A CN1033246C CN 1033246 C CN1033246 C CN 1033246C CN 91111801 CN91111801 CN 91111801 CN 91111801 A CN91111801 A CN 91111801A CN 1033246 C CN1033246 C CN 1033246C
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- cement
- concrete
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- water
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
- Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)
Abstract
The present invention relates to a method for quickly testing the mixing proportion of concrete. The mixing proportion of concrete is determined by using a void volume formed by the different grade mixing of coarse aggregates, the coarse aggregates are first filled in a test cup for testing the mixing proportion of concrete to be on the same level with the upper mouth of the test cup, water is measured and filled in the cup so as to obtain the void volume (VW) of the coarse aggregates after the coarse aggregates are mashed, and the dosage of the coarse aggregates, the dosage of cement and the proportion of water to cement can be obtained by calculation according to an empirical formula and empirical data. Compared with a traditional sieving method, the method of the present invention can simplify testing procedures, save time and labor and accurately calculate the dosage of the cement, and the method has the advantages of little error and high correctness.
Description
The present invention is used for construction work, the method for the proportioning the when test of more specifically saying so is used for cement and mixes with other material.
Available coagulation soil match ratio all adopts sieve method and empirical data to formulate.The determining of match ratio selected by the screening envelope diagram, do not form direct matching relationship with the grating of coarse aggregate.And the sieve method trivial operations, waste time and energy, error is big, make cement consumption form the waste of a definite form.
The purpose of this invention be to overcome the deficiency of prior art and provide a kind of can short form test program, save time, laborsaving, and accurate cement consumption, can reasonably formulate the method for concrete mix fast.
Technology implementation scheme of the present invention is: utilize the different void volume that grating produced of coarse aggregate to determine concrete mixture ratio.Common filling should be come by fine aggregate and cement in theory in these spaces, cement and fine aggregate are decided earlier according to a certain percentage, then again by concrete design strength, the coefficient that the grating of cement mark and coarse aggregate etc. is formed is determined the concrete mix of various gratings.When aggregate is thick when bad (or grating), the space that is produced is bigger, want the fine aggregate of filling just many like this, and it is also accordingly many to press the definite cement consumption of fine aggregate.But big because of the space of coarse aggregate, the ratio of inserts and coarse aggregate is also just few, and promptly the pairing coarse aggregate of fine aggregate and cement will lack, and the level distribution coefficient is just few, to reduce cement consumption.When thin the or grating of coarse aggregate is better, the space that is produced is less, its filling fine aggregate is also just few, press the also minimizing accordingly of cement consumption that fine aggregate is determined, the ratio of inserts and coarse aggregate is just big like this, be that the pairing coarse aggregate of cement and fine aggregate is more, the level distribution coefficient is just big, should increase the consumption of cement.Based on the concrete proportion test cup of these employings is a certain amount of worn-out mouthful container, earlier the coarse aggregate filling is flushed with suitable for reading, after shake is smash, measures water-filling (measuring cup or weigh) in cup, and the consumption of water is the voidage V of coarse aggregate
w, formulate concrete mixture ratio with this:
Fine aggregate: V is thin=V
wK
Cement: V cement=V
wK
1, K
3, K
4
Water cement ratio:
V
w: the voidage of coarse aggregate (volume of water-filling in the worn-out mouthful container of test, measurement unit is a unit of account with the measurement unit of the worn-out mouthful container of test).
K: the mortar loss coefficient is got K=1.15
K
1: the concrete strength coefficient of cement consumption
K
3: the concrete strength coefficient of water cement ratio
K
3: the cement mark coefficient of cement consumption
K
4: the level distribution coefficient of coarse aggregate
C: concrete strength code name, footnote are intensity level, C
15Refer to that compressive strength is the concrete of 15 MPas, old label is 150kg/cm
2C
20Refer to that compressive strength is the concrete of 20 MPas, old label is 200kg/cm
2
W: the consumption of water when calculating water cement ratio, by weight
G: the consumption of cement when calculating water cement ratio, by weight
V cement: the cement consumption of match ratio, by volume
V is thin: the fine aggregate consumption of match ratio (standard medium sand), by volume
K
1, K
2For the concrete strength coefficient, see Table 1
K
3The cement mark coefficient sees Table 2
K
4The gradation of coarse aggregate coefficient
K
1, K
3, K
3Difference according to intensity rank, cement mark changes, and takes all factors into consideration the concrete strength coefficient, cement mark and wastage, and to draw empirical data as follows through experiment repeatedly:
Table 1
| Intensity rank | K 1 | K 2 |
| C 15 | 0.9 | 1.25 |
| C 20 | 1 | 1 |
| C 30 | 1.1 | 0.95 |
| C 40 | 1.20 | 0.9 |
Table 2
| Cement mark | K 3 |
| 325 | 1.05 |
| 425 | 1 |
| 525 | 0.95 |
| 625 | 0.9 |
Calculate the consumption of fine aggregate, the consumption and the water cement ratio of cement with top experimental formula and empirical data.
The present invention utilizes the void volume method to replace traditional sieve method, determines concrete mixture ratio, and the voidage that a demand goes out coarse aggregate can draw concrete mix accurately according to formula.Compare with numerous and diverse operation of sieve method, simple fast, reduced test routine, saved the time labour.The present invention has taken all factors into consideration the concrete strength rank, influence of various factors such as cement mark and wastage, and, draw various reference datas according to different situations, than the sieve method ratio, accuracy is higher, and has reduced manpower, the waste of material resources.
During use, coarse aggregate, fine aggregate, cement must meet the quality requirements of current national codes, as 1.3＞K
4＞0.85 o'clock, gradation of coarse aggregate was reasonable, should adjust the grating of coarse aggregate.
Accompanying drawing is the synoptic diagram of concrete proportion test cup.
Among the figure, 1 is a certain amount of worn-out mouthful container, and 2 is rim of a cup, requires to flush.
Embodiment: with volume as shown in drawings is 20 liters concrete proportion test cup, and the coarse aggregate filling is flushed with suitable for reading, measures 13 liters of water-fillings after shake is smash in cup, and the water yield also flushes with suitable for reading, draws the space V of coarse aggregate
w13 liters, loss coefficient K gets 1.15 by above-mentioned formula calculating, and the volume V of fine aggregate carefully is 9.96; If the concrete strength rank is C
30K
1Be 1.1, K
2Be 0.95, if cement mark 525, K
3Be 0.95, then the volume V cement of cement is 5 liters, and water cement ratio is 8.075, draws this concrete mixture ratio to be: cement: fine aggregate: coarse aggregate=1: 1.99: 4.
Claims (1)
- A kind of concrete mix method of testing, it is characterized in that: utilize the different void volume that grating produced of coarse aggregate to determine concrete mixture ratio, get our mouthful container as the concrete proportion test cup, coarse aggregate inserted to make with suitable for reading in this test glass flush, shake is smash the back and measure water-filling in cup, and the consumption of water is the voidage V of coarse aggregate w, with following experimental formula and empirical data, calculate the consumption of fine aggregate, the consumption of cement and water cement ratioFine aggregate: V is thin=V wKCement: V cement=V w, K 1, K 3, K 4Water cement ratio:V w: the voidage of coarse aggregate (volume of water-filling in the worn-out mouthful container of test, measurement unit is a unit of account with the measurement unit of the worn-out mouthful container of test).K: the mortar loss coefficient is got K=1.15K 1: the concrete strength coefficient of cement consumptionK 2: the concrete strength coefficient of water cement ratioK 3: the cement mark coefficient of cement consumptionK 4: the level distribution coefficient of coarse aggregateC: concrete strength code name, footnote are intensity level, C 15Refer to that compressive strength is the concrete of 15 MPas, old label is 150kg/cm 2C 20Refer to that compressive strength is the concrete of 20 MPas, old label is 200kg/cm 2W: the consumption of water when calculating water cement ratio, by weightG: the consumption of cement when calculating water cement ratio, by weightV cement: the cement consumption of match ratio, by volumeV is thin: the fine aggregate consumption of match ratio (standard medium sand), by volumeK 1, K 2Be the concrete strength coefficientK 1Be the cement mark coefficientK 4Be the gradation of coarse aggregate coefficient
K 1, K 2, K 3According to intensity rank, the difference of cement mark and changing,Intensity rank K 1K 2Cement mark K 3C 15 0.9 1.25 325 1.05C 20 1 1 425 1C 30 1.1 0.95 525 0.95C 40 1.20 0.9 625 0.9
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91111801 CN1033246C (en) | 1991-12-21 | 1991-12-21 | Method and equipment for quick test of concrete proportioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91111801 CN1033246C (en) | 1991-12-21 | 1991-12-21 | Method and equipment for quick test of concrete proportioning |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1073525A CN1073525A (en) | 1993-06-23 |
| CN1033246C true CN1033246C (en) | 1996-11-06 |
Family
ID=4910863
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91111801 Expired - Fee Related CN1033246C (en) | 1991-12-21 | 1991-12-21 | Method and equipment for quick test of concrete proportioning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1033246C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101898388A (en) * | 2010-05-07 | 2010-12-01 | 中国葛洲坝集团股份有限公司 | Extrusion type flexible concrete mixing proportion design method |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6379031B1 (en) * | 2000-01-20 | 2002-04-30 | Aggregate Research Industries, Llc | Method for manufacturing concrete |
| CN101435815B (en) * | 2008-11-17 | 2012-03-07 | 武继虎 | New mixing concrete mixing proportion determinator |
| CN102830000B (en) * | 2012-08-21 | 2014-08-13 | 中国人民解放军国防科学技术大学 | Preparation method of cement concrete scientific research sample |
-
1991
- 1991-12-21 CN CN 91111801 patent/CN1033246C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101898388A (en) * | 2010-05-07 | 2010-12-01 | 中国葛洲坝集团股份有限公司 | Extrusion type flexible concrete mixing proportion design method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1073525A (en) | 1993-06-23 |
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