CN101566618A - Raw material analysis method for rapidly monitoring concrete quality - Google Patents
Raw material analysis method for rapidly monitoring concrete quality Download PDFInfo
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- CN101566618A CN101566618A CNA2009100944835A CN200910094483A CN101566618A CN 101566618 A CN101566618 A CN 101566618A CN A2009100944835 A CNA2009100944835 A CN A2009100944835A CN 200910094483 A CN200910094483 A CN 200910094483A CN 101566618 A CN101566618 A CN 101566618A
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- 239000004567 concrete Substances 0.000 title claims abstract description 104
- 239000002994 raw material Substances 0.000 title claims abstract description 30
- 238000004458 analytical method Methods 0.000 title claims abstract description 14
- 238000012544 monitoring process Methods 0.000 title claims abstract description 10
- 239000004576 sand Substances 0.000 claims abstract description 101
- 239000004575 stone Substances 0.000 claims abstract description 65
- 239000000463 material Substances 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- 239000004568 cement Substances 0.000 claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 238000013461 design Methods 0.000 claims abstract description 10
- 238000004364 calculation method Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 31
- 238000012360 testing method Methods 0.000 claims description 18
- 238000005303 weighing Methods 0.000 claims description 17
- 230000015271 coagulation Effects 0.000 claims description 14
- 238000005345 coagulation Methods 0.000 claims description 14
- 239000002689 soil Substances 0.000 claims description 14
- 238000005070 sampling Methods 0.000 claims description 11
- 238000004445 quantitative analysis Methods 0.000 claims description 10
- 239000000284 extract Substances 0.000 claims description 6
- 235000013312 flour Nutrition 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 239000007858 starting material Substances 0.000 claims description 5
- 239000000470 constituent Substances 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- 238000004513 sizing Methods 0.000 claims description 4
- 238000012795 verification Methods 0.000 claims description 4
- 101001009851 Rattus norvegicus Guanylate cyclase 2G Proteins 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 abstract description 17
- 238000000034 method Methods 0.000 abstract description 16
- 239000000126 substance Substances 0.000 abstract description 4
- 238000010998 test method Methods 0.000 abstract description 3
- 238000001704 evaporation Methods 0.000 abstract description 2
- 230000008020 evaporation Effects 0.000 abstract description 2
- 238000000926 separation method Methods 0.000 abstract 2
- 239000000203 mixture Substances 0.000 description 10
- 230000001112 coagulating effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007873 sieving Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000006703 hydration reaction Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 239000004571 lime Substances 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 208000034189 Sclerosis Diseases 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- AGWMJKGGLUJAPB-UHFFFAOYSA-N aluminum;dicalcium;iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Al+3].[Ca+2].[Ca+2].[Fe+3] AGWMJKGGLUJAPB-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- HOOWDPSAHIOHCC-UHFFFAOYSA-N dialuminum tricalcium oxygen(2-) Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[Al+3].[Al+3].[Ca++].[Ca++].[Ca++] HOOWDPSAHIOHCC-UHFFFAOYSA-N 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012113 quantitative test Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
Abstract
The invention provides a raw material analysis method for rapidly monitoring concrete quality, which comprises the following steps of: separating four main raw materials in fresh concrete by adopting the means of heating stir-frying and classifying screen separation; proposing 10 calculation methods to quantitatively calculate the actual mixing proportion of the concrete by being combined with the component analysis of sandstone materials; and judging whether the quality of structural concrete reaches the design requirements or not. In the invention, obvious errors causes by the change of concrete sand ratio, coarse aggregate content, ambient humidity, concrete content and the like in the chemical method of targets of the same type are avoided. The method is scientific and reasonable, is in accordance with the existing standards, specifications and procedures, and also fully considers the influence of mortar stone adhesion when designing test procedures and deducing the calculation methods, and possible errors due to water evaporation, cement flying ash, screen separation loss of silty sand, and the like. The method is simple and convenient, has fast checking computation and can obtain results after about half an hour generally, thereby being capable of effectively avoiding discovering various losses caused by quality problems after the structure concrete is solidified.
Description
Technical field
The present invention relates to a kind of before initial set the method for quick test concrete quality, belong to civil engineering work-concrete technology field.
Background technology
Concrete is one of building materials that is most widely used.Because its maximum purposes is to manufacture bearing carrier, so the quality of its quality is directly connected to the safety and the endurance quality of buildings.The economic phenomena that is limited to China's wide geographic area, mixing building, the mixing plant that adopts industrial microprocessor to measure and fill a prescription are the equipment that the larger building site of minority can have; The work pattern that most medium and small projects still adopt simple and easy stirring machine even artificial shovel to mix is produced concrete, makes the lacking in supervision foundation of mix quality, has caused a large amount of construction quality hidden danger and serious accident.The collapse incident of collapsing and concrete prescription of the Qijiang Hongqiao in the shock whole nation is closely related; The residential housing quality problems that various places occur are also mostly owing to out of control the causing of concrete actual match ratio.Many units in charge of construction are with trolley, the iron sheet barrel metering outfit as concrete raw material, and charging is very not strict.The results of the spot checks show in a large amount of building sites: a dolly aproll mud is 78kg only after a little while, and amount then reaches 112kg for a long time, differs 30%; One barrel of water is 9.7kg only after a little while, and amount reaches 11.1kg, difference 12% at most.So allot concrete intensity and differ several times, same concrete design mixture proportion is mixed out 80-420 number sample difference unexpectedly in certain building site.Except the site management confusion, workmen's sense of responsibility has beyond the reason such as to be strengthened, and lack the simple and effective monitoring means of fresh concrete at the scene and adjust foundation, also be the major reason that causes numerous quality accidents.
Before this, the method of inferring concrete quality before initial set all belongs to chemical scheme, wherein the most representative when " the quick-hardening intensity experiment method that concrete mix sclerosis back intensity is inferred " that push away Japanese building association, and " with urging to press with fixed attention the instant establish concrete strength test method of steaming technique " of highway research institute of China Ministry of Communications.But, investigation that this seminar carries out at common stirring machine in working-yard, some counties and cities, southwest and the revision test result that we are carried out under the condition of building site all show, fast hard mortar specimen intensity and the correlativity between the concrete curing 28d normal intensity that this class chemistry is surveyed strong method are remarkable inadequately, and practical error is bigger.For the reason of analytical error, seminar has designed qualitative contrast test (comprise many days revision tests and discretization error calculate), and test findings has been carried out theoretical analysis.
(1). the influence of sand coarse aggregate ratio: the influence that concrete early strength is subjected to aggregate is big and chemicals and " press and steam " are waited only to cement generation effect, that is the quick-setting mortar piece reflects is concrete early strength.And, cause the intensity of mortar piece to rise on the contrary because the reduction of cement consumption with amount set accelerator (5g) and cement reaction has more fully taken place.The 28d intensity of standard cube of concrete test specimen is then main relevant with the label and the water cement ratio of cement, so the in test only slightly decline of intensity of correspondence during the sand coarse aggregate ratio increase.Two kinds of differences of trend as a result that research technique brings mean that the building site changes as if sand coarse aggregate ratio when real mixed concrete, the concrete standard intensity of being released by the short method of coagulating of chemistry will produce error.
(2). the influence of coarse aggregate: the preparation raw material of " quick-setting mortar piece " is taken from the mortar of wet screening in the concrete, has ignored the influence of the coarse aggregate variation in the concrete to intensity.Test findings but shows, rationally strengthens the ratio of coarse aggregate, for increasing concrete intensity positive effect is arranged, and this is because the intensity of coarse aggregate generally is higher than the intensity of cement bonded sand lumps.So the variation of coarse aggregate ratio also will make the 28d normal intensity of releasing from " quick-setting mortar piece " produce error during real mixed concrete.
(3). the influence of ambient humidity: contrast test proves, it is higher on the contrary that the lower and mortar piece of concrete normal intensity short coagulates fast hard intensity during dry high temperature.This be because before the concrete initial set moisture loss mainly reduces is later strength (comprising 28d intensity); But losing of wet screening moisture but increased the relative concentration of set accelerator in the mortar piece, thereby short early strength of coagulating the mortar piece is increased.Hence one can see that, if humidity, the temperature difference of short " pilot study " of surveying strong method with fixed attention of chemistry during with " on-the-spot sampling monitoring " is bigger, then the normal intensity formula of being set up by pilot study of inferring must contain bigger error.
(4). the influence of cement composition: correlation theory and conclusion (of pressure testing) all point out, set accelerator and intensification, pressurization maintenance mainly influence is the tricalcium aluminate (C3A) in the cement and the chemical reaction process of tetra calcium aluminoferrite (C4AF), thereby makes mortar piece high-early-strength.Yet, the result of our investigation and the manufacture of cement standard of various countries all show: even the same label cement of same manufacturer production, the content of C3A or C4AF also is to allow to change, its difference reaches more than 30% sometimes, and this is enough to the calculating formula of inferring based on " the short mortar bulk strength of coagulating " is produced obviously influence.Otherwise the 28d intensity of standard cube of concrete then is the result of four kinds of common hydrations of principal ingredient in the cement, and its Changing Pattern has difference with " the short mortar piece that coagulates " that only reflect above-mentioned two kinds of cement compositions certainly.In other words, after C3A or the C4AF content in cement, " the inferring formula " that draws with same pilot study predicted concrete 28d normal intensity again, will inevitably cause bigger error.
To sum up analyze: with acceleration hydration reactions such as set accelerator, high temperature, high pressure is strength mortar piece morning of principle, and the rule of development difference of the concrete sample 28d normal intensity that the rule of development of its intensity and acceptance of work standard are specified is bigger.Therefore, the value of concrete strength that adopts the principles of chemistry to infer fast, and will produce obvious errors inevitably between the structure concrete actual strength.
Summary of the invention
Technical matters to be solved by this invention is: provide a kind of before initial set the method for quick test concrete quality, its principle is reliable, easy and simple to handle, quantitative test and calculating are quick, can find its quality problems before concrete initial set.
The scheme that solution the technology of the present invention problem is adopted is: random sampling in the concrete of newly mixing, adopt four kinds of primary raw materials that heating stirs, the physical means of gradation sizing separates fresh concrete, and in conjunction with the constituent analysis of sandstone raw material, propose 10 calculating formulas and come the concrete actual match ratio of quantitative Analysis, on-the-spot quality inspection and management personnel contrast itself and design objective, can infer rapidly that can structure concrete quality reach designing requirement.
Implementation step is:
(1). extract sandstone material sample and fresh concrete sample at the scene synchronously;
(2). clean inside and outside will stirring pot, heating stirs and separates concrete sample, obtains the content of concrete drier, dried rubble, dried coarse sand and microlith respectively;
(3). parting sand, stone material sample obtain rough sand, rubble content respectively;
(4). extract sand, stone raw material in stockpile, heating stirs to isolate moisture, obtains dry sand content and drystone content respectively.
(5). with the calculating formula of above-mentioned test findings and this proposition, the sandstone raw material is carried out quantitative Analysis, obtain the water percentage of sand material, the water percentage of building stones, the silty sand rate of sand material, the microlith rate of building stones;
(6). with above-mentioned test findings and calculating formula, calculate the starting material content in the concrete sampling, obtain building stones, sand material, cement respectively, add quantity such as water;
(7). calculate concrete actual match ratio at last, so that judge whether concrete meets design objective.
Described sand sample and the stone material sample amount of taking by weighing are 2000g; The calculating formula of the silty sand rate of the water percentage of described sand material, the water percentage of building stones, sand material, the microlith rate of building stones is:
1.. the water percentage of sand material
2.. the water percentage of building stones
3.. the silty sand rate of sand material
4.. the microlith rate of building stones
It is G that described coagulation soil sample adds the quality that stirs pot
0+ 3000; Described building stones, sand material, cement, the calculating formula that adds water are:
1.. the building stones quality
2.. sand material quality
3.. cement quality C=G
Hq-G
0-G ÷ (1+W
G)-S ÷ (1+W
S);
4.. the outer amount of water of coagulation soil sample
5.. result of calculation should satisfy verification: G+S+C+W=3000 (g);
6.. concrete actual match ratio is:
Described C, S, G, W---represent cement amount, sand amount, stone amount, outer amount of water in the concrete respectively; G
0---stir the quality of pot;
G
Hq---after heating stirs, the pot and the quality sum of concrete drier;
G
SG---the total amount of dried coarse sand and microlith in the coagulation soil sample;
G
Gh---the dried rubble quality in the coagulation soil sample;
G
G---the quality of the building stones sample of getting;
G
SD, G
GD---represent the dry mass of sand sample and stone sample respectively;
W
S, W
G---be respectively the water percentage of sand, building stones;
G
Sh1, G
Sh2---be respectively sand material sample after twice screening, remaining coarse sand quality (g);
G
GC---the rubble content (g) in the building stones sample;
d
S, d
G---be respectively the flour sand rate of sand material and the microlith rate of building stones.
Principle of work of the present invention: random sampling in the concrete of newly mixing, adopt 4 kinds of primary raw materials that heating stirs, the physical means of gradation sizing separates fresh concrete, and, propose 10 calculating formulas and come the concrete actual match ratio of quantitative Analysis in conjunction with the constituent analysis of sandstone raw material.On-the-spot quality inspection and management personnel contrast itself and design objective, can infer rapidly that can structure concrete quality reach designing requirement.
Concrete implementation step of the present invention:
(1) extracts sandstone material sample and fresh concrete sample at the scene synchronously;
(2) heating stirs and separates concrete sample, obtains the content of concrete drier, dried rubble, dried coarse sand and microlith respectively;
(3) parting sand, stone material sample obtain rough sand, rubble content respectively;
(4) extract sand, stone raw material in stockpile, heating stirs to isolate moisture, obtains dry sand content and drystone content respectively.
(5) with the calculating formula of above-mentioned test findings and this proposition, the sandstone raw material is carried out quantitative Analysis, obtain the water percentage of sand material, the water percentage of building stones, the silty sand rate of sand material, the microlith rate of building stones;
(6) with the calculating formula of above-mentioned test findings and this proposition, calculate the starting material content in the concrete sampling, obtain building stones, sand material, cement respectively, add quantity such as water;
(7) calculate concrete actual match ratio at last, so that judge whether concrete meets design objective.
The function of each important composition of the present invention is:
(1) heating stirs: remove the moisture in sandstone starting material and the concrete sample respectively, so that calculate the outer amount of water in preceding water percentage of mixing of raw material and the concrete;
(2) gradation sizing: from sandstone raw material and concrete sample, isolate cement, flour sand, rough sand, microlith, rubble respectively, so that calculate concrete actual match ratio.
(3) weighing: the quality that each time is stirred or sieve the back surplus materials is measured, so that determine the content of relevant composition in sandstone raw material and the concrete.Draw error for fear of evaporation and wind etc., isolated cement, flour sand, moisture etc. are not carried out direct weighing.
(4) quantitative Analysis: in conjunction with the aforementioned component content, the present invention is corresponding to have proposed 10 calculating formulas, be used for water percentage, the water percentage of building stones, flour sand rate, microlith rate, building stones content, sand content, cement content, moisture, the result of calculation verification of quantitative Analysis sand material, finally obtain the actual match ratio of coagulation soil sample.See the elaboration in the back page or leaf " embodiment " for details.
(5) actual match ratio: target of the present invention.On-the-spot quality inspection or management personnel can judge before initial set with this achievement and design objective contrast whether the concrete of this batch is qualified; Also quality improvement scheme targetedly can be proposed in view of the above.
The invention has the beneficial effects as follows:
(1) avoided in the chemical method of similar target, because the appreciable error that variations such as concrete sand coarse aggregate ratio, coarse aggregate content, ambient humidity, cement composition are drawn.
(2) test method of Ti Chuing and quantitative Analysis formula are scientific and reasonable.Except meeting existing standard, standard, rules, when design experiment step and derivation calculating formula, also taken into full account the sticking glutinous influence of mortar building stones, and the error that may occur such as the screening loss of water evaporates, cement flying dust and silty sand.
(3) water cut that detects and calculate is outer amount of water, and is identical with the custom in general building site
(4) theoretical ripe, principle is reliable, method is easy, check is quick, generally can obtain achievement about half an hour, thereby various losses of just finding quality problems after can avoiding the structure concrete to solidify effectively and being caused.
Embodiment
Further specify flesh and blood of the present invention with example below, but content of the present invention is not limited to this.
Random sampling in the concrete of newly mixing separates four kinds of primary raw materials with simple tools, and after the constituent analysis of sandstone material, the quantitative Analysis concrete mixture ratio is qualified if the structure concrete is then declared in fluctuation in allowed limits.
Except that special statement, all mass units are gram among the present invention.
(1). grab sample: 1. phoresying on car or the travelling belt with charging basket taking-up sand material, each about 2L of building stones; 2. use the inside surface of wet cloth wiping charging basket, divide from the stirring machine mouth and obtain fresh concrete 4～6L four times, and close tight bung in order to avoid water evaporates.
(2). separate the coagulation soil sample:
1.. clean inside and outside will stirring pot, claim that its quality is G
0(g);
2.. the coagulation soil sample poured into stir in the pot, mix back weighing pot and concrete thoroughly, making its quality is G
0+ 3000 (g), unnecessary concrete is abandoned from all directions shovel with shovel;
3.. pot placed on the electric furnace together with concrete stir, therebetween with shovel slightly plus-pressure building stones are separated with mortar.Steam run substantially clean after, every stir-fry weighing in 5 minutes once, the difference that always stirs adjacent twice weighing less than 1g till.Weighing pot+concrete drier is designated as G
Hq(g);
4.. divide several times concrete drier pack into reciprocating gird and vibration slightly in the 5mm sieve, directly being sieved to does not have till the sand-lime that sieves.The sand-lime that sieves all collection is gone in the stainless steel disc, must not omit, and the weighing sieve is gone up dried rubble quality, is designated as G
Gh(g);
5.. ash, sand, microlith potpourri that stainless steel disc is collected divide several times to place reciprocating gird on the 0.15mm sieve, shake the about 100 times/min of speed, shake the about 50cm of the width of cloth.Behind the basic well sifted, the sandstone on the sieve to going into to stir in the pot, with shovel crushing mortar particle wherein, is then placed reciprocating gird on the 0.15mm sieve, till the per minute amount of sieving is lower than 1g again.Dried coarse sand and microlith total amount on the weighing sieve are designated as G
SG(g).
(3). analyze the sampling of sand, stone raw material:
1.. sand sample is mixed thoroughly, from multi-faceted shovel sand sampling 1000g, divided several times to place 0.15mm sieve reciprocating gird, the about 100 times/min of reciprocating gird speed shakes the about 50cm of the width of cloth, and the amount of sieving that directly is sieved to per minute is lower than till the 1g.Coarse sand total amount on the weighing sieve is designated as G
Sh1(g);
2.. repeat said process, the coarse sand total amount on the sieve is designated as G
Sh2(g);
3.. the quality of weighing sampling building stones is designated as G
G(g);
4.. divide several times that building stones are placed 5mm sieve reciprocating gird, till directly being sieved to no microlith and sieving, the rubble total amount on weighing is sieved is designated as G
GC(g).
(4). the water percentage test of sand, stone raw material:
1.. with interior, multi-faceted sand, each about 4L of building stones of extracting respectively, after mixing thoroughly respectively, respectively taking by weighing 2000g is sand sample and stone sample at stockpile top layer 5cm;
2.. will stir a pot wiped clean, and successively sand sample, stone sample be placed respectively to stir in the pot and propagandize hotly, steam run substantially clean after, whenever stir 5min and connect the weighing of pot band sand (or stone) sample once, till the difference of adjacent twice weighing is less than 1g;
3.. sand sample and the stone sample after doing fried in weighing respectively, and its quality is designated as G respectively
SDAnd G
GD(g).
(5). the component quantifying of sandstone raw material calculates:
1.. the water percentage of sand material
2.. the water percentage of building stones
3.. the silty sand rate of sand material
4.. the microlith rate of building stones
(6). the starting material cubage in the concrete:
1.. the building stones quality
2.. sand material quality
3.. cement quality C=G
Hq-G
0-G ÷ (1+W
G)-S ÷ (1+W
S);
4.. the outer amount of water of coagulation soil sample
5.. result of calculation should satisfy verification and calculate: G+S+C+W=3000 (g).
(7). concrete actual match ratio is calculated:
The implication of symbol is as follows in each calculating formula:
C, S, G, W---represent cement amount, sand amount, stone amount, outer amount of water (g) in the concrete respectively;
G
0---stir the quality (g) of pot;
G
Hq---after heating stirs, the pot and the quality sum (g) of concrete drier;
G
SG---the total amount of dried coarse sand and microlith (g) in the coagulation soil sample;
G
Gh---the dried rubble quality (g) in the coagulation soil sample;
G
G---the quality (g) of the building stones sample of getting;
G
SD, G
GD---represent the dry mass (g) of sand sample and stone sample respectively;
W
S, W
G---be respectively the water percentage of sand, building stones;
G
Sh1, G
Sh2---be respectively sand material sample after twice screening, remaining coarse sand quality (g);
G
GC---the rubble content (g) in the building stones sample;
d
S, d
G---be respectively the flour sand rate of sand material and the microlith rate of building stones.
Claims (5)
1, a kind of raw material analysis method of rapidly monitoring concrete quality, be characterised in that: random sampling in the concrete of newly mixing, adopt four kinds of primary raw materials that heating stirs, the physical means of gradation sizing separates fresh concrete, and in conjunction with the constituent analysis of sandstone raw material, propose 10 calculating formulas and come the concrete actual match ratio of quantitative Analysis, on-the-spot quality inspection and management personnel contrast itself and design objective, can infer rapidly that can structure concrete quality reach designing requirement.
2, the raw material analysis method of rapidly monitoring concrete quality according to claim 1 is characterised in that implementation step is:
(1). extract sandstone material sample and fresh concrete sample at the scene synchronously;
(2). clean inside and outside will stirring pot, heating stirs and separates concrete sample, obtains the content of concrete drier, dried rubble, dried coarse sand and microlith respectively;
(3). parting sand, stone material sample obtain rough sand, rubble content respectively;
(4). extract sand, stone raw material in stockpile, heating stirs to isolate moisture, obtains dry sand content and drystone content respectively.
(5). with the calculating formula of above-mentioned test findings and this proposition, the sandstone raw material is carried out quantitative Analysis, obtain the water percentage of sand material, the water percentage of building stones, the silty sand rate of sand material, the microlith rate of building stones;
(6). with above-mentioned test findings and calculating formula, calculate the starting material content in the concrete sampling, obtain building stones, sand material, cement respectively, add quantity such as water;
(7). calculate concrete actual match ratio at last, so that judge whether concrete meets design objective.
3, the raw material analysis method of rapidly monitoring concrete quality according to claim 2 is characterized in that: described sand sample and the stone material sample amount of taking by weighing are 2000g; The calculating formula of the silty sand rate of the water percentage of described sand material, the water percentage of building stones, sand material, the microlith rate of building stones is:
1.. the water percentage of sand material
2.. the water percentage of building stones
3.. the silty sand rate of sand material
4.. the microlith rate of building stones
4, the raw material analysis method of rapidly monitoring concrete quality according to claim 2 is characterized in that: it is G that described coagulation soil sample adds the quality that stirs pot
0+ 3000; Described building stones, sand material, cement, the calculating formula that adds water are:
1.. the building stones quality
2.. sand material quality
3.. cement quality C=G
Hq-G
0-G ÷ (1+W
G)-S ÷ (1+W
S);
4.. the outer amount of water of coagulation soil sample
5.. result of calculation should satisfy verification: G+S+C+W=3000 (g);
6.. concrete actual match ratio is:
5, according to the raw material analysis method of each described rapidly monitoring concrete quality in claim 3 or 4, it is characterized in that: described C, S, G, W---represent cement amount, sand amount, stone amount, outer amount of water in the concrete respectively;
G
0---stir the quality of pot;
G
Hq---after heating stirs, the pot and the quality sum of concrete drier;
G
SG---the total amount of dried coarse sand and microlith in the coagulation soil sample;
G
Gh---the dried rubble quality in the coagulation soil sample;
G
G---the quality of the building stones sample of getting;
G
SD, G
GD---represent the dry mass of sand sample and stone sample respectively;
W
S, W
G---be respectively the water percentage of sand, building stones;
G
Sh1, G
Sh2---be respectively sand material sample after twice screening, remaining coarse sand quality (g);
G
GC---the rubble content (g) in the building stones sample;
d
S, d
G---be respectively the flour sand rate of sand material and the microlith rate of building stones.
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|---|---|---|---|
| CNA2009100944835A CN101566618A (en) | 2009-05-22 | 2009-05-22 | Raw material analysis method for rapidly monitoring concrete quality |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100944835A CN101566618A (en) | 2009-05-22 | 2009-05-22 | Raw material analysis method for rapidly monitoring concrete quality |
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| Publication Number | Publication Date |
|---|---|
| CN101566618A true CN101566618A (en) | 2009-10-28 |
Family
ID=41282878
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| CN103278461A (en) * | 2013-06-21 | 2013-09-04 | 中建八局第一建设有限公司青岛分公司 | Evaluation device of concrete components |
| CN103592325A (en) * | 2013-10-28 | 2014-02-19 | 北京工业大学 | Method for determining finely-grinded mineral slag original content in hardened concrete |
| CN103726429A (en) * | 2014-01-26 | 2014-04-16 | 哈尔滨工业大学 | Method for quickly verifying production grading of hot-mixed asphalt concrete |
| CN105753391A (en) * | 2016-01-21 | 2016-07-13 | 山东建泽混凝土有限公司 | Fair-faced concrete mix proportion design method and related fair-faced concrete |
| CN110488782A (en) * | 2019-08-26 | 2019-11-22 | 中电建路桥集团有限公司 | Cement concrete batching plant back court intelligent monitor system based on BIM platform |
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| CN105753391A (en) * | 2016-01-21 | 2016-07-13 | 山东建泽混凝土有限公司 | Fair-faced concrete mix proportion design method and related fair-faced concrete |
| CN110488782A (en) * | 2019-08-26 | 2019-11-22 | 中电建路桥集团有限公司 | Cement concrete batching plant back court intelligent monitor system based on BIM platform |
| CN114577657A (en) * | 2020-12-02 | 2022-06-03 | 博特新材料泰州有限公司 | Method for measuring water absorption of recycled aggregate in cement base material |
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| CN114839356A (en) * | 2022-04-07 | 2022-08-02 | 昆明理工大学 | Method for predicting compressive strength loss rate of alkali slag concrete after high temperature |
| CN114839356B (en) * | 2022-04-07 | 2023-09-15 | 昆明理工大学 | Method for predicting compressive strength loss rate of alkali slag concrete at high temperature |
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Application publication date: 20091028 |