CN107621428A - Suitable for the binder materials content assaying method of limestone fine aggregate maturing - Google Patents
Suitable for the binder materials content assaying method of limestone fine aggregate maturing Download PDFInfo
- Publication number
- CN107621428A CN107621428A CN201710908907.1A CN201710908907A CN107621428A CN 107621428 A CN107621428 A CN 107621428A CN 201710908907 A CN201710908907 A CN 201710908907A CN 107621428 A CN107621428 A CN 107621428A
- Authority
- CN
- China
- Prior art keywords
- sample
- heat
- days
- solution
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
A kind of binder materials content assaying method suitable for limestone fine aggregate maturing, 1.1, detection sample and preparation：Two defective concrete samples to be measured are taken, again not less than 4.5 kilograms, air-dries, is sample A, C；The preparation of 1.2 standards of comparison：Make grade standard sample B0；Dispense in 3 air-tight bottles, by age 3,7,28 days, respectively B3、B7、B28；1.3 sample measurement of heat fusion methods：It is measured using tester for cement hydration heat, lysate is prepared：(2.00 ± 0.02) mol/L salpeter solutions about 410g and the hydrofluoric acid mixed solutions of 10ml 40%, gross mass of (13.5 ± 0.5) DEG C reach (425 ± 0.1) g, calculate the heat of solution of each sample, work as QA/Qtx>=0.95, it will be recognized that gel material content meets to require；Work as QA/Qtx<0.95, it will be recognized that gel material content deficiency.
Description
Technical field
The present invention relates to building material field, be particularly suitable for use in using limestone fine aggregate concrete or mix high calcium fine coal
Cement content assay method in the concrete of ash.
Background technology
Concrete is the maximum construction material of current dosage, and concrete amount is with the increase of China's construction scale and drastically
Increase.National concrete amount in 2006 is about 2,100,000,000 m3, 2010 reach 4,000,000,000 m3.Quality is good on the whole for the concrete poured
It is good, but also occur various mass defects unavoidably, as concrete surface occur voids and pits, concrete crushing strength not enough, coagulation
Native endurance quality can not meet requirement etc..The generation of these defects is probably what a kind of reason was formed, it is also possible to many reasons
Comprehensive formation.Wherein cement consumption deficiency is the factor for first having to consider when concrete strength or durability are unsatisfactory for requiring.
When the record of production can not determine defect cause, the assay method of the cement consumption in maturing is main at present
Have：1. optical microscopy, fluorescence microscope and ESEM microscope are to apply more measure concrete composition at present
Optical microscopy.Optical microscopy, it is adapted to quick measure, shortcoming is that obtained results contrast is rough；2. chemical analysis side
Method, determine SiO in concrete2And CaO, content, then can determine the dosage of cement in concrete by calculating.It is wherein chemical
Analysis method result is ideal, but for filling the concrete of high-calcium fly ass or the concrete using limestone fine aggregate,
Due to being disturbed by the calcium carbonate of calcium oxide in high-calcium fly ass or limestone aggregate dissolving, it is difficult to obtain accurate result
Judged, experimental accuracy is very low.
The content of the invention
It is an object of the invention to overcome existing chemical dissolution method can not Accurate Determining admixture high-calcium fly ass concrete
Or the defects of using cement content in the concrete of limestone fine aggregate, there is provided one kind more can fill high calcium fine coal by Accurate Determining
The concrete of ash or the method using cement content in the concrete of limestone fine aggregate.
The technical solution adopted in the present invention is that a kind of binder materials suitable for limestone fine aggregate maturing contains
Quantity measuring method, it is characterized by：
1.1st, sample is detected with preparing：After the completion of concreting, the t days find it is defective, take two it is defective
Concrete sample to be measured, sample minimum length or diameter be not less than four times of maximum aggregate nominal diameter, meanwhile, each sample
Product are not less than 4.5 kilograms again, and sample is air-dried；After one of sample broke rejects coarse aggregate, by remaining cement mortar powder
By 5mm square hole screens after broken, 100 grams are taken with quartering, it is levigate after all by 0.60mm square hole screens, it is standby as unknown sample A
With；Another sample C weighs, and is designated as W0；
1.1.1 sample C volume：Sample C is immersed in the water and is dipped to constant weight；Sample C is weighed to be completely submerged in water
Weight, hang gained weight of weighing and be designated as W2；Sample is taken out, dries and weighs, be designated as W1, sample C volume=(w1-w2)/ρ, ρ
W is determined for sample C2When water density；
The preparation of 1.2 standards of comparison
1.2.1 binder materials B is mixed in the ratio of binder materials in the grade match ratio of engine request, weighs sample
Product Dg, D ＜ 10, standard sample B as a comparison0；
1.2.2. the binder materials B of 100g mixing is weighed, adds water 40g, stirs, is respectively charged into the small modeling of 3 sealings
Expect in bottle, any one bottle of content is no less than 30g, and preserving should be with temperature after concreting to be measured to off-test, storage temperature
Spend close；
When being 1.2.3.t less than 28 days, a plastic bottle is taken out respectively by 3 days ages, 7 days, t days, breaks into pieces, passes through after levigate
0.60mm square hole screens, weigh sample 1.4Dg when heat of solution (calculate sample quality calculated with Dg), standard sample as a comparison,
Respectively B3、B7、Bt；A plastic bottle is taken out respectively by 3 days ages, 7 days, t days, is broken into pieces, passes through 0.60mm square holes after levigate
Sieve, weighs sample 1.4Dg, standard sample as a comparison, respectively B3、B7、Bt；When t is more than or equal to 28 days, by age 3
My god, take out a plastic bottle respectively within 7 days, 28 days, break into pieces, it is levigate after by 0.60mm square hole screens, weigh sample 1.4Dg and (calculate
Sample quality is calculated with Dg during heat of solution), standard sample as a comparison, respectively B3、B7、B28；
1.2.4 the sand of engineering is air-dried, labeled as sample S；
1.3 sample measurement of heat fusion methods：It is measured using tester for cement hydration heat, using preceding needing first by instrument
Operation instruction carries out thermal capacitance demarcation；
1.3.1. room temperature (20 ± 1) DEG C is kept, Water Tank with Temp.-controlled water temperature is maintained at (20 ± 0.1) DEG C；
1.3.2 the preparation of special lysate：Pass through addition (13.5 ± 0.5) DEG C in experiment inner cylinder of the funnel to instrument
(2.00 ± 0.02) mol/L salpeter solutions about 410g and the hydrofluoric acid mixed solutions of 10ml 40%, gross mass reach (425 ± 0.1)
G, after continuously stirring 30min, read note bayesian temperature reading θ0；
1.3.3 measurement of heat fusion：The standard sample weighed up in advance is added into special dissolving in 2min by charging hopper
In liquid, plug is covered, 20min reads to remember bayesian temperature reading θ on time1, 40min reading note bayesian temperature readings θ2；
1.3.4. the heat of solution of sample is calculated as follows, and result of calculation retains to 0.1J/g：
Q=(2 × θ1- θ0- θ2)×C/G
In formula：
The heat of solution of Q --- sample, unit are every gram of joule (J/g)；(or kJ/kg)
C --- calorimeter thermal capacity, unit are every degree Celsius of joule (J/ DEG C)；
The quality of G --- sample, unit are gram (g)；
1.3.5 sample B is weighed by 1.3.1-1.3.4 steps0Dg, and the sample B 1.4Dg of different phase are weighed, survey respectively
Determine B0、B3、B7And BtHeat of solution Q0、Q3、Q7And Qt；Or B0、B3、B7And B28Heat of solution Q0、Q3、Q7And Q28, according to what is measured
Q0、Q3、Q7And Q28The binder materials heat of solution Q of any age can be calculated by curve matchingt；Sample A Dg are weighed, are drawn
QA；Air-dried sand sample product S Dg are weighed, draw Qs；
1.4 contrast
1.4.1 grade match ratio is：Gel material content B kg/m3；Sand S kg/m3；Stone G kg/m3；Water W
kg/m3。
The heat of solution of mortar should be under concrete air dried condition：
In formula：
Qtx--- the heat of solution of contrast standard sample, unit are every kilogram of kilojoule (kJ/kg)；
Qt--- the heat of solution of t days binder materials, unit are every kilogram of kilojoule (kJ/kg)；
Qs--- the heat of solution of sand sample is air-dried, unit is every kilogram of kilojoule (kJ/kg)；
W0、W1、W2--- air-dry weight, saturation plane dry weight and the weight being immersed in water of another defective sample；
ρ --- sample C determines W2When water density, can table look-up acquisition；
1.4.2 result judgement
A, Q is worked asA/Qtx>=0.95, it will be recognized that gel material content meets to require；
B, Q is worked asA/Qtx<0.95, it will be recognized that gel material content deficiency.
Explanation：1. measurement of heat fusion, parallel test should be carried out when having ready conditions, to improve reliability.
2. when decaying concrete finds more early, dissolving heat test should be carried out as early as possible, makes t smaller.When t is less than 28 days,
Q can not be0、Q3、Q7、Q28, directly it is Qt, the accuracy of result can be improved, saves the time, reduces the calculating of complexity.
In step 1.1.1 samples C cubing, described weighing sample C is completely submerged in water, refers to that water should not have
Cross more than sample 10mm.
This patent is the detection on the basis of existing concrete raw material dissolving thermal result and concrete mix is grasped
The heat of solution of concrete mortar, by the cement consumption being calculated in concrete, to mix high-calcium fly ass or using limestone
The quick judgement of fine concrete defect type provides scientific basis.It is that one kind can be suitably used for mixing high-calcium fly ass or use
The higher cement content assay method of the degree of accuracy of the concrete of limestone fine aggregate.It is increasingly deficient with natural sand building stones,
Engineering using artificial sand building stones is more and more.Lime stone is extensive as raw material sources, parent rock material of good performance, artificial
Application in sand material is also more and more.The application and popularization of this method will seem important all the more.
The test principle of the present invention：If gel material content deficiency in concrete, the mortar heat of solution of unit mass will be small
In the heat of solution by mix calculation, by determining its heat of solution, calculate analysis and can determine whether binder materials in unit concrete
Whether dosage is enough.
Embodiment
The present invention is described in detail below, cited embodiment can be such that professional and technical personnel more understands
The present invention, but the invention is not limited in any way.
A kind of binder materials content assaying method suitable for limestone fine aggregate maturing, it is characterised in that：
1.1st, sample is detected with preparing：After the completion of concreting, the t days find it is defective, take two it is defective
Concrete sample to be measured, sample minimum length or diameter be not less than four times of maximum aggregate nominal diameter, meanwhile, each sample
Product are not less than 4.5 kilograms again, and sample is air-dried；After one of sample broke rejects coarse aggregate, by remaining cement mortar powder
By 5mm square hole screens after broken, 100 grams are taken with quartering, it is levigate after all by 0.60mm square hole screens, it is standby as unknown sample A
With；Another sample C weighs, and is designated as W0；
1.1.1 sample C volume：Sample C is immersed in the water and is dipped to constant weight；Sample C is weighed to be completely submerged in water
Weight, water should not have more than sample 10mm, hung gained weight of weighing and were designated as W2；Sample is taken out, dries and weighs, be designated as W1, sample
C volume=(w1-w2)/ρ, ρ is that sample C determines W2When water density；
The preparation of 1.2 standards of comparison
1.2.1 binder materials B is mixed in the ratio of binder materials in the grade match ratio of engine request, weighs sample
Product Dg, D ＜ 10, D=3, standard sample B as a comparison in this example0；
1.2.2. the binder materials B of 100g mixing is weighed, adds water 40g, stirs, is respectively charged into the small modeling of 3 sealings
Expect in bottle, any one bottle of content is no less than 30g, and preserving should be with temperature after concreting to be measured to off-test, storage temperature
Spend close；
When being 1.2.3.t less than 28 days, a plastic bottle is taken out respectively by 3 days ages, 7 days, t days, breaks into pieces, passes through after levigate
0.60mm square hole screens, it is that 4.2g (due to the binder materials B of 100g in 1.2.2, adds water 40g, therefore 4.2g to weigh sample 1.4Dg
In have 3g B), standard sample as a comparison, respectively B3、B7、Bt；A plastics were taken out respectively by 3 days ages, 7 days, t days
Bottle, break into pieces, it is levigate after by 0.60mm square hole screens, weigh sample 4.2g, standard sample as a comparison, respectively B3、B7、Bt；
When t is more than or equal to 28 days, a plastic bottle is taken out respectively by 3 days ages, 7 days, 28 days, breaks into pieces, passes through 0.60mm after levigate
Square hole screen, it is 4.2g when heat of solution (calculate sample quality calculated with 3g) to weigh sample 1.4Dg, standard sample as a comparison
Product, respectively B3、B7、B28；
1.2.4 the sand of engineering is air-dried, labeled as sample S；
1.3 sample measurement of heat fusion methods：It is measured using tester for cement hydration heat, using preceding needing first by instrument
Operation instruction carries out thermal capacitance demarcation；The model of instrument (calorimeter) in inventive samples measurement of heat fusion：SHR-2 types are surveyed
Determining instrument, (China Building Materials Academy's cement is supervised；Wafangdian Jian Ke laboratory apparatus Manufacturing Co., Ltd manufactures)
1.3.1. room temperature (20 ± 1) DEG C is kept, Water Tank with Temp.-controlled water temperature is maintained at (20 ± 0.1) DEG C；
1.3.2 the preparation of special lysate：Pass through addition (13.5 ± 0.5) DEG C in experiment inner cylinder of the funnel to instrument
(2.00 ± 0.02) mol/L salpeter solutions about 410g and the hydrofluoric acid mixed solutions of 10ml 40%, gross mass reach (425 ± 0.1)
G, after continuously stirring 30min, read note bayesian temperature reading θ0；
1.3.3 measurement of heat fusion：The standard sample weighed up in advance is added into special dissolving in 2min by charging hopper
In liquid, plug is covered, 20min reads to remember bayesian temperature reading θ on time1, 40min reading note bayesian temperature readings θ2；
1.3.4. the heat of solution of sample is calculated as follows, and result of calculation retains to 0.1J/g：
Q=(2 × θ1- θ0- θ2In) × C/G formulas：
The heat of solution of Q --- sample, unit are every gram of joule (J/g)；(or kJ/kg)
C --- calorimeter thermal capacity, unit are every degree Celsius of joule (J/ DEG C)；
The quality of G --- sample, unit are gram (g)；
1.3.5 sample B is weighed by 1.3.1-1.3.4 steps03g, and the sample B 4.2g of different phase are weighed, survey respectively
Determine B0、B3、B7And BtHeat of solution Q0、Q3、Q7And Qt；Or B0、B3、B7And B28Heat of solution Q0、Q3、Q7And Q28, according to what is measured
Q0、Q3、Q7And Q28The binder materials heat of solution Q of any age can be calculated by curve matchingt；Sample A 3g are weighed, are drawn
QA；Air-dried sand sample product S 3g are weighed, draw Qs；
1.4 contrast
1.4.1 grade match ratio is：Gel material content B kg/m3；Sand S kg/m3；Stone G kg/m3；Water W
kg/m3。
The heat of solution of mortar should be under concrete air dried condition：
In formula：
Qtx--- the heat of solution of contrast standard sample, unit are every kilogram of kilojoule (kJ/kg)；
Qt--- the heat of solution of t days binder materials, unit are every kilogram of kilojoule (kJ/kg)；
Qs--- the heat of solution of sand sample is air-dried, unit is every kilogram of kilojoule (kJ/kg)；
W0、W1、W2--- air-dry weight, saturation plane dry weight and the weight being immersed in water of another defective sample；
ρ --- sample C determines W2When water density, can table look-up acquisition；
1.4.2 result judgement
A, Q is worked asA/Qtx>=0.95, it will be recognized that gel material content meets to require；
B, Q is worked asA/Qtx<0.95, it will be recognized that gel material content deficiency.
Explanation：1. measurement of heat fusion, parallel test should be carried out when having ready conditions, to improve reliability.
2. when decaying concrete finds more early, dissolving heat test should be carried out as early as possible, makes t smaller.When t is less than 28 days,
Q can not be0、Q3、Q7、Q28, directly it is Qt, the accuracy of result can be improved, saves the time, reduces the calculating of complexity.
Southwest hydropower station concrete coarse-fine aggregate processes by lime stone.Wherein a certain C30 graduation twos concrete (is matched somebody with somebody
It is 18.8MPa that composition and division in a proportion, which is shown in Table 1) mixing building machine mouth sampling 7 day age compression strength of test specimen, and age compression strength only reaches within 28 day
27.6MPa, on-site concrete is detected with reisilometer, it is 25MPa--28MPa to measure 30 days age concrete intensity, bright
It is aobvious to be less than design load.For the Producing reason that searches problem, match ratio, raw material testing result, mixing building to concrete and pour
The scene of building record on duty etc. is investigated and analysed.The reason for eliminating concrete mix, raw material and site operation aspect, bosom
It is suspected to be caused by the binder materials deficiency added when mixing building concrete mixes and stirs.
Table 1C30 concrete mixs (kg/m3)
| Title material | Cement | Flyash | Sand | Stone | Water | Additive |
| Material usage | 240 | 80 | 740 | 1235 | 122 | 2.25 |
The reason for further to make a definite diagnosis problem, the undesirable concrete of intensity (i.e. decaying concrete) drilling is taken
Sample.Graduation two aggregate maximum particle diameter is 40mm, a diameter of 150mm of institute's coring sample, is cut concrete core sample with stone sawing machine
Multiple samples are cut into, length is about 150mm.Three samples are taken to carry out compression test, the compression strength after conversion is 27.3MPa.
By the broken rejecting coarse aggregate of one of concrete sample, 5mm square hole screens are crossed, mortar samples are taken about with quartering
It is 100 grams, with porcelain mortar that sample (A) is levigate, all by 0.6mm square hole screens, it is stored in closed container.Weigh 3 grams of sample
By above-mentioned 2.2 sample (A) measurement of heat fusion method, its heat of solution is determined.(the heat of the calorimeter determined in advance by instrument specification
Capacity is 1732.8J/ DEG C)
From SHR-2 type analyzers, instrument is installed by instrument explanation.Keep room temperature (20 ± 1) DEG C, Water Tank with Temp.-controlled water temperature
Temperature is maintained at (20 ± 0.1) DEG C；The 2.01mol/L salpeter solutions of (13.5 ± 0.5) DEG C are weighed with the acidproof plastic cups of 500ml about
410g, measure the hydrofluoric acid mixed solutions of 10ml 40% with plastic cylinder and add in nitric acid, then add a small amount of nitric acid with dropper to make always
Quality reaches (425 ± 0.1) g.Added by acid funnel in the experiment inner cylinder of instrument, take out acid funnel, insert Beckman
Electronic thermometer；Turn on agitator, 30min measure θ0For 13.681 DEG C；Weigh up 3.1131 grams of samples are passed through into charging immediately
Funnel is added completely into experiment inner cylinder, and 20min measures θ1For 15.316 DEG C；40min measures θ2For 15.772 DEG C.(sample adds examination
The time for testing inner cylinder is the 40th day after concreting, i.e. 40) t is.Instrument is cleared up, it is standby to install instrument again.
By formula：QA=(2 × θ1- θ0- θ2)×C/G
=(2 × 15.316-13.681-15.772) × 1732.8/3.1131
=656.2J/g=(656.2kJ/kg)
A diameter unbroken sample of 150mm length 150mm (C) separately is taken, weigh to obtain W0=6312g；Sample immerses water
In (water should not have more than sample 10mm) soak 48 hours, hanging claims to obtain weight W in water21=3710g, soak 52 hours, claim to obtain water
Middle heavy W21=3710g, takes W2=3710g；Sample is dried to the W that weighs to obtain1=6360g.
The cement and flyash to keep sample is weighed in the ratio in table 1, cement 75g, flyash 25g is weighed, stirs, is claimed
Take binder materials 3g (real to be referred to as 3.0051g) measure heat of solution；Equally weighed (13.5 ± 0.5) DEG C with the acidproof plastic cups of 500ml
2.01mol/L salpeter solutions about 410g, with plastic cylinder measure the hydrofluoric acid mixed solutions of 10ml 40% add nitric acid in, then
Adding a small amount of nitric acid with dropper makes gross mass reach (425 ± 0.1) g.Added in the experiment inner cylinder of instrument, taken by acid funnel
Go out acid funnel, insert Beckman electronic thermometer；Turn on agitator, 30min is stirred, measures θ0=13.938 DEG C；θ1=
18.100℃；θ2=18.598 DEG C.Calculate to obtain Q0=2112.7J/g=(2112.7kJ/kg).
The cement and flyash to keep sample is weighed in the ratio in table 1, cement 75g, flyash 25g is weighed, adds water 40g,
Stir and be respectively charged into the small plastic bottle of 3 sealings, (storage temperature should be with temperature after concreting to be measured within 28 days for preservation
It is close).
A plastic bottle is taken out respectively by 3 days ages, 7 days, 28 days, is broken into pieces, is rejected plastic flakes, is passed through after levigate
0.60mm square hole screens, weigh sample 4.2g (due to having plus water 40g, thus when calculating heat of solution it is actual claim sample grams, should remove
With 1.4, accurately to decimal the 4th), measurement of heat fusion is carried out, measures Q respectively3=1932.7kJ/kg, Q7=1877.0kJ/
kg、Q28=1816.3kJ/kg.
The heat of solution that different larval instar binder materials is individually subtracted by the heat of solution of unhydrous binder obtains 3 days, 7 days and 28
The accumulation heat of hydration of its binder materials is respectively：R3=180.0kJ/kg, R7=235.7kJ/kg and R28=296.4kJ/kg (0
Its heat of hydration R0=0).
Data are substituted into following formula：
Rt=R∞{1-exp(-mtn)}
Wherein：Rt--- the accumulation heat of hydration (kJ/kg) during age t；
R∞--- the final heat of hydration (kJ/kg),
T--- ages (my god)；
M, n--- constants.
Calculate to obtain R∞=303.5kJ/kg, m=0.446, n=0.630.Thus 40 days accumulation heat of hydration R are calculated to obtain40=
300.3kJ/kg；The then heat of solution Q of 40 days binder materials40=2112.7-300.3=1812.4kJ/kg.
Take engineering construction to be air-dried with sand, weigh 3.0102g, carry out measurement of heat fusion, measure Qs=362.2kJ/kg.
The heat of solution of mortar should be under concrete air dried condition：
Result judgement：
QA/Qtx=656.2/723.9=0.91<0.95, confirm gel material content deficiency.
Claims (2)
- A kind of 1. binder materials content assaying method suitable for limestone fine aggregate maturing, it is characterised in that：1.1st, sample is detected with preparing：After the completion of concreting, find within the t days defective, take two defective to treat Concrete sample is surveyed, sample minimum length or diameter are not less than four times of maximum aggregate nominal diameter, meanwhile, each sample weight Not less than 4.5 kilograms；One of sample is air-dried, after broken rejecting coarse aggregate, will passed through after the crushing of remaining cement mortar 5mm square hole screens, 100 grams are taken with quartering, it is levigate after all by 0.60mm square hole screens, it is standby as unknown sample A；Other one Individual sample C is air-dried, and is weighed, is designated as W0；1.1.1 sample C volume：Sample C is immersed in the water and is dipped to constant weight；The weight that sample C is completely submerged in water is weighed, Hang gained weight of weighing and be designated as W2；Sample is taken out, dries and weighs, be designated as W1, sample C volume=(w1-w2)/ρ, ρ is sample C determines W2When water density；The preparation of 1.2 standards of comparison：1.2.1 binder materials B is mixed in the ratio of binder materials in the grade match ratio of engine request, weighs sample Dg, D ＜ 10, standard sample B as a comparison0；1.2.2. the binder materials B of 100g mixing is weighed, adds water 40g, stirs, is respectively charged into the small plastic bottle of 3 sealings In, any one bottle of content is no less than 30g, and preserving should be with temperature phase after concreting to be measured to off-test, storage temperature Closely；When being 1.2.3.t less than 28 days, a plastic bottle is taken out respectively by 3 days ages, 7 days, t days, breaks into pieces, passes through after levigate 0.60mm square hole screens, sample 1.4Dg is weighed, standard sample as a comparison, respectively B3、B7、Bt；By 3 days, 7 days, t days age Respectively take out a plastic bottle, break into pieces, it is levigate after by 0.60mm square hole screens, weigh sample 1.4Dg, standard sample as a comparison Product, respectively B3、B7、Bt；When t is more than or equal to 28 days, a plastic bottle is taken out respectively by 3 days ages, 7 days, 28 days, is broken into pieces, By 0.60mm square hole screens after levigate, sample 1.4Dg is weighed, standard sample as a comparison, respectively B3、B7、B28；1.2.4 the sand of engineering is air-dried, labeled as sample S；1.3 sample measurement of heat fusion methods：It is measured using tester for cement hydration heat, using preceding needing first to use by instrument Illustrate to carry out thermal capacitance demarcation；1.3.1. room temperature (20 ± 1) DEG C is kept, Water Tank with Temp.-controlled water temperature is maintained at (20 ± 0.1) DEG C；1.3.2 the preparation of special lysate：Pass through (2.00 of addition (13.5 ± 0.5) DEG C in experiment inner cylinder of the funnel to instrument ± 0.02) mol/L salpeter solutions about 410g and the hydrofluoric acid mixed solutions of 10ml 40%, gross mass reach (425 ± 0.1) g, even After continuous stirring 30min, note bayesian temperature reading θ is read0；1.3.3 measurement of heat fusion：The standard sample weighed up in advance is added in special lysate in 2min by charging hopper, Plug is covered, 20min reads to remember bayesian temperature reading θ on time1, 40min reading note bayesian temperature readings θ2；1.3.4. the heat of solution of sample is calculated as follows, and result of calculation retains to 0.1J/g：Q=(2 × θ1- θ0- θ2)×C/GIn formula：The heat of solution of Q --- sample, unit are every gram of joule (J/g)；(or kJ/kg)C --- calorimeter thermal capacity, unit are every degree Celsius of joule (J/ DEG C)；The quality of G --- sample, unit are gram (g)；1.3.5 sample B is weighed by 1.3.1-1.3.4 steps0Dg, and the sample B 1.4Dg of different phase are weighed, B is determined respectively0、 B3、B7And BtHeat of solution Q0、Q3、Q7And Qt；Or B0、B3、B7And B28Heat of solution Q0、Q3、Q7And Q28, according to the Q measured0、Q3、 Q7And Q28The binder materials heat of solution Q of any age can be calculated by curve matchingt；Sample A Dg are weighed, draw QA；Weigh Sand sample product S Dg are air-dried, draw Qs；1.4 contrast：1.4.1 grade match ratio is：Gel material content B kg/m3；Sand S kg/m3；Stone G kg/m3；Water W kg/m3。The heat of solution of mortar should be under concrete air dried condition：In formula：Qtx--- the heat of solution of contrast standard sample, unit are every kilogram of kilojoule (kJ/kg)；Qt--- the heat of solution of t days binder materials, unit are every kilogram of kilojoule (kJ/kg)；Qs--- the heat of solution of sand sample is air-dried, unit is every kilogram of kilojoule (kJ/kg)；W0、W1、W2--- air-dry weight, saturation plane dry weight and the weight being immersed in water of another defective sample；ρ --- sample C determines W2When water density, can table look-up acquisition；1.4.2 result judgementA, Q is worked asA/Qtx>=0.95, it will be recognized that gel material content meets to require；B, Q is worked asA/Qtx<0.95, it will be recognized that gel material content deficiency.
- A kind of 2. binder materials assay side suitable for limestone fine aggregate maturing according to claim 1 Method, it is characterised in that：In step 1.1.1 samples C cubing, described weighing sample C is completely submerged in water, is referred to Water should not have more than sample 10mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710908907.1A CN107621428B (en) | 2017-09-29 | 2017-09-29 | Cementitious material content assaying method suitable for limestone fine aggregate maturing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710908907.1A CN107621428B (en) | 2017-09-29 | 2017-09-29 | Cementitious material content assaying method suitable for limestone fine aggregate maturing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107621428A true CN107621428A (en) | 2018-01-23 |
| CN107621428B CN107621428B (en) | 2019-08-20 |
Family
ID=61091164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710908907.1A Active CN107621428B (en) | 2017-09-29 | 2017-09-29 | Cementitious material content assaying method suitable for limestone fine aggregate maturing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107621428B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445043A (en) * | 2018-05-31 | 2018-08-24 | 中国建材检验认证集团股份有限公司 | Hydration heat of cement measurement device |
| CN112782042A (en) * | 2021-01-27 | 2021-05-11 | 北京兆福基新材料科技发展有限公司 | Method for judging type of delayed coagulation adhesive and application thereof |
| CN113125296A (en) * | 2019-12-31 | 2021-07-16 | 江苏苏博特新材料股份有限公司 | Method for testing initial mix proportion of hardened concrete |
| CN115144540A (en) * | 2022-06-29 | 2022-10-04 | 安徽理工大学环境友好材料与职业健康研究院(芜湖) | Chemical component detection device of alkali-activated cementing material and use method thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1789965A (en) * | 2005-12-26 | 2006-06-21 | 重庆市节能技术服务中心 | Method for detecting content of river sand and fly ash in concrete mixture |
| CN102269682A (en) * | 2011-05-12 | 2011-12-07 | 湖南大学 | Method for detecting mineral admixtures in freshly mixed cement paste, mortar and concrete |
| CN103063802A (en) * | 2012-12-31 | 2013-04-24 | 清华大学 | Potentiometric titration determination method of cemented sand gravel cement content |
| CN103163039A (en) * | 2013-04-10 | 2013-06-19 | 中国水利水电第十四工程局有限公司 | Method for quickly determining water-cement ratio of industrial-cinder-doped concrete |
| CN104817310A (en) * | 2015-04-20 | 2015-08-05 | 中国水利水电科学研究院 | Quantitative designing method of preparing low-heat and high crack-resisting hydraulic concrete by composite binding materials |
| CN107036925A (en) * | 2016-11-10 | 2017-08-11 | 哈尔滨工业大学 | The detection method of fly ash content in concrete |
-
2017
- 2017-09-29 CN CN201710908907.1A patent/CN107621428B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1789965A (en) * | 2005-12-26 | 2006-06-21 | 重庆市节能技术服务中心 | Method for detecting content of river sand and fly ash in concrete mixture |
| CN102269682A (en) * | 2011-05-12 | 2011-12-07 | 湖南大学 | Method for detecting mineral admixtures in freshly mixed cement paste, mortar and concrete |
| CN103063802A (en) * | 2012-12-31 | 2013-04-24 | 清华大学 | Potentiometric titration determination method of cemented sand gravel cement content |
| CN103163039A (en) * | 2013-04-10 | 2013-06-19 | 中国水利水电第十四工程局有限公司 | Method for quickly determining water-cement ratio of industrial-cinder-doped concrete |
| CN104817310A (en) * | 2015-04-20 | 2015-08-05 | 中国水利水电科学研究院 | Quantitative designing method of preparing low-heat and high crack-resisting hydraulic concrete by composite binding materials |
| CN107036925A (en) * | 2016-11-10 | 2017-08-11 | 哈尔滨工业大学 | The detection method of fly ash content in concrete |
Non-Patent Citations (1)
| Title |
|---|
| 王述银 等: "I级粉煤灰对水泥水化热影响的初步研究", 《粉煤灰》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108445043A (en) * | 2018-05-31 | 2018-08-24 | 中国建材检验认证集团股份有限公司 | Hydration heat of cement measurement device |
| CN113125296A (en) * | 2019-12-31 | 2021-07-16 | 江苏苏博特新材料股份有限公司 | Method for testing initial mix proportion of hardened concrete |
| CN112782042A (en) * | 2021-01-27 | 2021-05-11 | 北京兆福基新材料科技发展有限公司 | Method for judging type of delayed coagulation adhesive and application thereof |
| CN112782042B (en) * | 2021-01-27 | 2023-08-08 | 北京兆福基新材料科技发展有限公司 | Judging method of retarder type and application thereof |
| CN115144540A (en) * | 2022-06-29 | 2022-10-04 | 安徽理工大学环境友好材料与职业健康研究院(芜湖) | Chemical component detection device of alkali-activated cementing material and use method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107621428B (en) | 2019-08-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107621428B (en) | Cementitious material content assaying method suitable for limestone fine aggregate maturing | |
| Wei et al. | Prediction of standard compressive strength of cement by the electrical resistivity measurement | |
| CN101694449A (en) | Testing device for carbonization resistance of cement based materials and testing method | |
| Chen et al. | Microstructural development of hydrating portland cement paste at early ages investigated with non-destructive methods and numerical simulation | |
| membership of RILEM TC 219-ACS et al. | RILEM recommended test method: AAR-2—detection of potential alkali-reactivity—accelerated mortar-bar test method for aggregates | |
| CN107102066A (en) | A kind of device and method of indoor ultrasound detection air bubble mix light-textured soil intensity | |
| CN106932651A (en) | Irregular shape is gathered materials the detection method of dielectric constant | |
| Ge et al. | Characterization and performance prediction of cement-based materials using a simple isothermal calorimeter | |
| CN109270255A (en) | A method of prediction ready-mixed concrete intensity | |
| Sommer et al. | AAR-5: Rapid preliminary screening test for carbonate aggregates | |
| Lu et al. | Development of a universal accelerated test for alkali-silica and alkali-carbonate reactivity of concrete aggregates | |
| Sahoo et al. | Behaviour of recycled coarse aggregate concrete: age and successive recycling | |
| CN106290049A (en) | A kind of test is by the method for the inside concrete sulfate ion concentration of sulfate attack | |
| CN103837578A (en) | Test method for evaluating chloride-corrosion resistance performance of gelatinization material | |
| Hills et al. | The clay mineral content of various rock types compared with the methylene blue value | |
| Nixon et al. | Testing aggregates for alkali-reactivity: Report of RILEM TC-106 | |
| CN114965167A (en) | Method for rapidly judging whether machine-made sand methylene blue value is qualified or not | |
| CN103163039A (en) | Method for quickly determining water-cement ratio of industrial-cinder-doped concrete | |
| Wistuba et al. | Adhesion of bitumen: Screening and evaluating laboratory testing techniques | |
| RU2664509C1 (en) | Mobile laboratory for cement slurries testing | |
| Shindman et al. | Comparative study of plastic property test methods for self-consolidating concrete | |
| Weise et al. | R3-Test for Pozzolanic Reactivity: Experimental Issues and Practical Recommendations for Hydration Stoppage with Isopropanol | |
| CN101008600A (en) | Quick determination method of water content of block | |
| Tang | Brief Analysis on Sampling and Testing Method of Concrete Specimen of Building Materials | |
| membership of RILEM TC 219-ACS et al. | RILEM Recommended Test Method: AAR-5—Detection of Potential Alkali-Reactivity—Rapid Preliminary Screening Test for Carbonate Aggregates |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |