CN104634692A - Method for determining cement content of building mortar - Google Patents
Method for determining cement content of building mortar Download PDFInfo
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- CN104634692A CN104634692A CN201410475066.6A CN201410475066A CN104634692A CN 104634692 A CN104634692 A CN 104634692A CN 201410475066 A CN201410475066 A CN 201410475066A CN 104634692 A CN104634692 A CN 104634692A
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Abstract
The invention belongs to the field of cement mortar detection and in particular relates to a method for determining the cement content of building mortar. The invention aims to solve the technical problem that a brand-new method which can be effectively used for determining the cement content of building mortar is provided. The method comprises the following three steps: specimen preparation, specimen detection and computation, wherein a loss on ignition method is adopted for determination in the step of specimen detection. The method has the beneficial effects that a method for analyzing the components in the building mortar is provided for the first time, and the foundation is laid for detection of the cement-based building mortar; the method has the advantages of high detection speed, no lagging, simplicity in operation and low detection cost, and is suitable for rapid monitoring in building mortar production enterprises, construction units and quality inspection mechanisms.
Description
Technical field
The invention belongs to sand-cement slurry detection field.Be specifically related to the cement content assay method of building mortar.
Background technology
Building mortar refers to by inorganic coagulation material, fine aggregate, admixture, water, and other components to determine according to performance coordinate by proper proportion, mixing through the architecture engineering material of sclerosis, mainly play the effects such as bonding, liner and transmission stress in construction work.According to the premixing mortar that the productive prospecting of mortar is divided into the mortar of working-yard mixing and is produced by professional production factory.
At present, the major gelled material of building mortar comprises: cement, gypsum, lime etc., wherein cement is as a kind of hydraulic cementing materials, is widely used in various buildings and structures, is the main binding material of building mortar.Common portland cement production region is wide, and turnout is large, and better can meet the various performances of building mortar, therefore common portland cement is widely used in different mortar.For the cement in concrete, as portland cement, Portland cement, slag cement etc. all can be used in mortar.For some dry-mixed mortar, as gravity flowing levelling mortar, grout and mortar, rapid-patching motar, lost circulation additive etc., because requiring that it has the characteristic of early-strong-fast-hard, usually adopt aluminate cement, sulphate aluminium cement, ferrous aluminate cement etc.
Main aggregate sand source as carrying effect in building mortar is also very extensive, mainly comprises natural sand and Machine-made Sand two kinds.Natural sand refers to that natural conditions effect is formed, nominal particle diameter is less than the rock particles of 5.00mm.River sand, extra large sand, mountain sand is divided into by product source difference.Artificial sand refers to that rock is through being less than the rock particles of 5.00mm except the nominal particle diameter of soil exploitation, Mechanical Crushing, screening.River sand is because of long-term by running water, and particle is circular, and common engineering mostly adopts river sand.Sea sand is because being for a long time subject to seawater scouring, and particle is round and smooth, cleaner, but is often mixed with shell and fragment thereof and chloride content is higher, does not generally use.Mountain sand is present in mountain valley or by-water, and particle multi-band corner angle, rough surface, content of stone powder is more.Lithotome fragmentation forms by artificial sand, and therefore rough surface is rough, and corner angle are many, and content of powder is larger.Along with the sharply increase of construction work quantity, domestic natural sand quantity consumes huge, causes riverbed to destroy, and living resources habitat disappears, river ecological environment out of trim, and underground water table declines, and affects flood control safety and increases river navigation burden.Machine-made Sand wide material sources, grating is adjustable, can gather materials on the spot, and realizes low-cost production building mortar, reduces the construction cost in the poor area of river sand.
It is the workability of fresh mortar and the mechanical property of hardened mortar that the performance of building mortar comprises one, two aspects, and the workability of mortar refers to that mortar whether is easily paved into evenly on surfaces such as masonries, continuous print thin layer, and the character of closely cohering with basic unit.This is the principal element affecting building mortar operating efficiency and construction quality, comprises operability and water-retaining property two aspect implication.Mortar first requirement will have good operability, comprises mobility, cohesiveness and thixotropy.The good mortar of operability is easily paved into uniform thin layer on coarse bulk surface, and can and bottom surface tight bond.The mortar using operability good both constructability operations, raise labour productivity, can ensure construction quality again.Mortar also will have good water-retaining property simultaneously, avoids the moisture in mortar to cross drought, too much being siphoned away by bulk, affects the further aquation of cement.Secondly the mortar after requiring sclerosis should have certain compressive strength, cohesive strength etc., to ensure intensity and the globality of masonry.And cement is the main source of building mortar compressive strength, rupture strength, guarantee building mortar sclerosis after stretching intensity, therefore the cement content effectively detected in mortar controls mortar quality, adjustment serves crucial effect.
The present inventor for provide a kind of completely newly, the cement content assay method of efficient construction mortar.
Summary of the invention
Technical matters solved by the invention be to provide a kind of completely newly, the method for the cement content measuring building mortar can be effective to.The present invention measures and comprises sample preparation, sample detection, calculating three large steps.
Wherein, sample preparation procedure is as follows:
1) preparation of mortar specimen to be measured
A, get the mortar prepared and stir, be cooled to room temperature;
B, take mortar, be accurate to 0.001g, sieved by 0.08mm, obtain screen underflow and screen overflow, detecting by the massfraction of screen cloth is η;
C, screen overflow are ground to and are sieved by 0.08mm completely;
2) preparation of cement sample to be measured
Get step 1) preparation mortar cement, stir and be cooled to room temperature;
Wherein, when preparing cement to be measured, because temperature when cement is marched into the arena is generally all more than 80 DEG C, could detect after therefore must being cooled to room temperature; And stirring is in order to sample is even, ensure that test result is accurate.
3) preparation of unclassified stores sample to be measured
Get step 1) unclassified stores beyond preparation mortar cement, according to the usage ratio mixing and stirring of preparation mortar, grinding material, to being sieved by 0.08mm completely, obtains the potpourri sample of unclassified stores; Unclassified stores is mineral admixture, sand, additive;
If in mortar, the addition content of additive or mineral admixture accounts for mortar total amount to be measured when being less than 0.01%, can not consider the impact adding additive or mineral admixture, only measure the loss on ignition of sand;
Assay method of the present invention specifically adopts loss-on-ignition to measure:
Sample detects
Take about 1g step 1 sample and prepare gained sample m
2, be accurate to 0.0001g, put into calcination to the porcelain mandarin orange of constant weight and bring disaster upon, lid is inclined on crucible and can prevents material from spraying, put in people's high temperature furnace, raised temperature gradually from low temperature, calcination 15min ~ 20min at 950 ± 25 DEG C, take out crucible and be placed in exsiccator, be cooled to room temperature, weigh; Calcination repeatedly, until constant weight, recording quality is m
3;
Calculate
1) material loss on ignition calculates by formula (1):
In formula:
Loss
material---material loss on ignition, %;
M
2---sample quality, g;
M
3---burn to constant weight quality, g;
The each Specimen Determination of preparation process of materialsing gained, obtains mortar specimen loss on ignition Lm, cement sample loss on ignition Lc, potpourri sample loss on ignition Ls;
2) cement content in mortar calculates by formula (2):
In formula: k---cement content, %;
Lm---mortar specimen loss on ignition, %;
Lc---cement sample loss on ignition, %;
Ls---unclassified stores sample loss on ignition, %.
In building mortar of the present invention, the beneficial effect of the assay method of cement content is as follows:
assay method of the present invention is provide the component analysis method in a kind of building mortar first, and lays the foundation for the detection of concrete base building mortar.
assay method of the present invention solves building mortar and relies on hardened mortar performance to judge the hysteresis quality of sand-cement slurry quality, can give warning in advance and control mortar quality.
assay method of the present invention solves the defect of mortar the measure of production equipment static shift correction, can when not stopping producing, check and correction metering outfit.
the operating performance of assay method of the present invention to anticipation concrete base building mortar has certain help, can partial analysis building mortar constructing operation performance change reason.
assay method of the present invention is simple to operate, does not need the investment of a large amount of instrument and equipment, single just can in laboratory complete independently, testing cost is low.
assay method detection speed of the present invention is fast, does not have hysteresis quality, is applicable to building mortar manufacturing enterprise, fast monitored in building unit and quality inspection mechanism.
assay method of the present invention is widely applicable, is almost applicable to all concrete base building mortars.
Embodiment
The embodiment of form by the following examples, is described in further detail foregoing of the present invention again, illustrates but does not limit the present invention.
Prepared by embodiment 1 sample
Get the sand-cement slurry prepared to stir, take in about 500g placement laboratory and be cooled to room temperature, directly carry out loss on ignition test.
Get the cement of preparation mortar, stirring is placed on laboratory and is cooled to room temperature, carries out loss on ignition test to cement; Get preparation mortar, mineral admixture, sand and additive, according to the ratio mixing and stirring of mineral admixture, sand and additive, use mortar grinder material to completely by 0.08mm square hole screen, carry out loss on ignition test.
Embodiment 2 embodiment 1 is prepared gained sample and is adopted loss-on-ignition to detect
Take about 1g step 1 sample and prepare gained sample m
2, be accurate to 0.0001g, put into calcination to the porcelain mandarin orange of constant weight and bring disaster upon, lid is inclined on crucible, put in people's high temperature furnace, raised temperature gradually from low temperature, calcination 15min ~ 20min at 950 ± 25 DEG C, take out crucible and be placed in exsiccator, be cooled to room temperature, weigh; Calcination repeatedly, until constant weight, recording quality is m
3.
Calculate
1) material loss on ignition calculates by formula (1):
In formula:
Loss
material---material loss on ignition, %;
M
2---sample quality, g;
M
3---burn to constant weight quality, g;
Get step 1 sample and prepare each Specimen Determination of gained, obtain mortar specimen loss on ignition Lm, cement sample loss on ignition Lc, potpourri sample loss on ignition Ls;
2) cement content in mortar calculates by formula (2):
In formula: k---cement content, %;
Lm---mortar specimen loss on ignition, %;
Lc---cement sample loss on ignition, %;
Ls---potpourri sample loss on ignition, %.
Prepare and measure the sample of following four group # respectively according to the method for embodiment 1 and 2, testing result is in table 1.
Table 1 premixing mortar testing result
Relative error=(detected value-theoretical value)/theoretical value.
The relative error of detected value and theoretical value is all within 2% as can be seen from Table 1, illustrates that detection method accuracy is higher, is suitable for building mortar manufacturing enterprise, fast monitored in building unit and quality inspection mechanism.
Claims (1)
1. the cement content assay method of building mortar, it is characterized in that, determination step is as follows:
One, sample preparation
1) preparation of mortar specimen to be measured
A, get the mortar prepared and stir and be cooled to room temperature;
B, take mortar, be accurate to 0.001g, sieved by 0.08mm, obtain screen underflow and screen overflow, detecting by the massfraction of screen cloth is η;
C, screen overflow are ground to and are sieved by 0.08mm completely;
2) preparation of cement sample to be measured
Get step 1) preparation mortar cement, stir and be cooled to room temperature;
3) preparation of unclassified stores sample to be measured
Get step 1) unclassified stores beyond preparation mortar cement, according to the usage ratio mixing and stirring of preparation mortar, grinding material, to being sieved by 0.08mm completely, obtains the potpourri sample of unclassified stores; Unclassified stores is mineral admixture, sand, additive;
Or, if the addition content of additive or mineral admixture accounts for mortar total amount to be measured and is less than 0.01% in mortar, then only measure the calcium oxide in sand;
Two, sample detects
Take about 1g step 1 sample and prepare gained sample m
2, be accurate to 0.0001g, put into calcination to the porcelain mandarin orange of constant weight and bring disaster upon, lid is inclined on crucible, put in people's high temperature furnace, raised temperature gradually from low temperature, calcination 15min ~ 20min under the temperature conditions of 925 DEG C-975 DEG C, take out crucible and be placed in exsiccator, be cooled to room temperature, weigh; Calcination repeatedly, until constant weight, recording quality is m
3;
Three, calculate
1) material loss on ignition calculates by formula (1):
In formula:
Loss
material---material loss on ignition, %;
M
2---sample quality, g;
M
3---burn to constant weight quality, g;
The each Specimen Determination of preparation process of materialsing gained, obtains mortar specimen loss on ignition Lm, cement sample loss on ignition Lc, potpourri sample loss on ignition Ls;
2) cement content in mortar calculates by formula (2):
In formula: k---cement content, %;
Lm---mortar specimen loss on ignition, %;
Lc---cement sample loss on ignition, %;
Ls---potpourri sample loss on ignition, %.
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| CN201410475066.6A CN104634692A (en) | 2014-09-17 | 2014-09-17 | Method for determining cement content of building mortar |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727652A (en) * | 2017-09-28 | 2018-02-23 | 南京林业大学 | A kind of method of cement content after turbidimetry for Determination MJS is reinforced |
| CN108896428A (en) * | 2018-04-28 | 2018-11-27 | 中国建材检验认证集团股份有限公司 | A kind of measuring method of sample loss on ignition |
| CN111141636A (en) * | 2020-01-14 | 2020-05-12 | 中建西部建设湖南有限公司 | Method for measuring content of aged mortar on surface of recycled coarse aggregate |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3939693A (en) * | 1973-04-26 | 1976-02-24 | Carrieres Et Fours A Chaux Dumont-Wautier | Process and apparatus for the qualitative and quantitative analysis of solid material |
| CN1595102A (en) * | 2004-07-16 | 2005-03-16 | 重庆市建筑科学研究院 | Method for detecting content of fly ash in newly stirred concrete |
| CN101539499A (en) * | 2009-04-23 | 2009-09-23 | 浙江工业大学 | Deductive method of hardened concrete mixing ratio |
| CN102072948A (en) * | 2010-09-02 | 2011-05-25 | 国投新登郑州水泥有限公司 | Method for rapidly detecting content of mixed materials in production course of cement |
-
2014
- 2014-09-17 CN CN201410475066.6A patent/CN104634692A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3939693A (en) * | 1973-04-26 | 1976-02-24 | Carrieres Et Fours A Chaux Dumont-Wautier | Process and apparatus for the qualitative and quantitative analysis of solid material |
| CN1595102A (en) * | 2004-07-16 | 2005-03-16 | 重庆市建筑科学研究院 | Method for detecting content of fly ash in newly stirred concrete |
| CN101539499A (en) * | 2009-04-23 | 2009-09-23 | 浙江工业大学 | Deductive method of hardened concrete mixing ratio |
| CN102072948A (en) * | 2010-09-02 | 2011-05-25 | 国投新登郑州水泥有限公司 | Method for rapidly detecting content of mixed materials in production course of cement |
Non-Patent Citations (1)
| Title |
|---|
| 王瑞海等: "《中华人民共和国国家标准 GB/T 12960-2007 水泥组分的定量测定》", 26 March 2007 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107727652A (en) * | 2017-09-28 | 2018-02-23 | 南京林业大学 | A kind of method of cement content after turbidimetry for Determination MJS is reinforced |
| CN107727652B (en) * | 2017-09-28 | 2019-12-03 | 南京林业大学 | A kind of method of cement content after turbidimetry for Determination MJS is reinforced |
| CN108896428A (en) * | 2018-04-28 | 2018-11-27 | 中国建材检验认证集团股份有限公司 | A kind of measuring method of sample loss on ignition |
| 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 |
| CN111141636A (en) * | 2020-01-14 | 2020-05-12 | 中建西部建设湖南有限公司 | Method for measuring content of aged mortar on surface of recycled coarse aggregate |
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Application publication date: 20150520 |