CN106969998A - A kind of concrete production useless slurry solid content rapid assay methods - Google Patents

Abstract

The invention discloses a kind of concrete production useless slurry solid content rapid assay methods：The useless slurry sample of certain volume is chosen from mixing plant concrete production useless slurry, the quality of useless slurry sample is weighed, useless slurry sample solid content is determined using oven drying method, using useless slurry solid content calculation formula, calculates useless slurry solid content correction factor；Useless slurry sample to be measured is chosen from mixing plant concrete production useless slurry, weigh the volume and quality of each useless slurry sample to be measured, the useless slurry solid content correction factor determined according to step one, using useless slurry solid content calculation formula, calculates the solid content for obtaining each useless slurry sample to be measured.The present invention can monitor useless slurry solid content in real time, whole operation process only needs to a few minutes, useless slurry solid content can quickly and accurately be determined, the mix-proportion adjustment of useless slurry concrete is mixed in guidance, ensure concrete performance, the recycling of useless slurry is realized, being useless slurry, applying in concrete provides technical support.

Description

A kind of concrete production useless slurry solid content rapid assay methods

Technical field

It is to be related to one kind in particular the present invention relates to the recycling field that ready-mixed concrete produces discarded object Concrete production useless slurry solid content rapid assay methods.

Background technology

One modernization, the ready-mixed concrete manufacturing enterprise of green production should regard saving water resource, energy-saving and emission-reduction as enterprise Industry obligation one can't decline.The useless slurry source of current ready-mixed concrete manufacturing enterprise is mainly cleaning concrete transport vehicle and stirring Main frame and produce, its main processing mode is direct discharge or dilution discharge, causes water resource waste, and severe contamination Environment.Requirement according to country to ready-mixed concrete mixing plant green production, useless slurry is directly applied to and prepares concrete, is coordinated The water in useless slurry is included in concrete water amount during than design, amount is included in gel material content, realizes waste water, useless slurry " zero-emission ", improve resource utilization rate, reduce enterprise production cost, improve enterprise competitiveness, realize energy-conservation, section Water, environmental protection, green production.

Useless slurry will be applied in concrete, need to determine the solid content of useless slurry first, the solid content of useless slurry directly affect its The performance of volume and concrete in concrete.Due to the common shadow by factors such as weather, output and production times Ring, the solid content of useless slurry is constantly in unstable state.The solid content for scrubbing useless slurry after trucd mixer is especially concentrated to rise brighter It is aobvious, so that the ready-mixed concrete production mix proportion for mixing useless slurry is difficult to control.Therefore, useless slurry is needed to it containing solid before the use Amount accurately determine instructing the production of concrete.

And the measure of solid content is general with reference to water content test method (oven drying method) progress, by sample in an oven certain At a temperature of dry to constant weight, the solid content of useless slurry is calculated with the mass values after drying；Oven drying method is although simple to operate, but There is problems with：

(1) sample weight that oven drying method is determined is small, general several grams to tens grams, and need to ensure what is materialsed when measuring Uniformity.And for useless slurry, with time of repose, in useless slurry, solid understands precipitated and separated, sample is difficult that control is uniform very little Property, meeting and actual solid content produce larger deviation.

(2) it is long the time required to oven drying method, 4-6 hour is typically needed, is calculated after being weighed again after complete drying, and solid content It is constantly in as tank car is rinsed in the state being continually changing, oven drying method can not timely determine the solid content of useless slurry, it is impossible to and When for instructing mix-proportion adjustment and the production of concrete, can not actually meet the requirement that useless slurry is applied to production, limit The application of useless slurry.

The content of the invention

The purpose of the present invention is to overcome the shortcoming and defect of existing solid content assay method there is provided a kind of accuracy rate is high, behaviour Make simple, the useless slurry solid content rapid assay methods suitable for concrete production of finding speed soon, useless slurry can be monitored in real time Solid content, whole operation process only needs to a few minutes, can quickly and accurately determine useless slurry solid content, and useless slurry concrete is mixed in guidance Mix-proportion adjustment, it is ensured that concrete performance, realize the recycling of useless slurry, the application for being useless slurry in concrete provides skill Art is supported.

The purpose of the present invention is achieved through the following technical solutions.

A kind of concrete production useless slurry solid content rapid assay methods of the present invention, comprise the following steps：

Step one, the determination of useless slurry solid content correction factor：

The useless slurry sample of certain volume is chosen from mixing plant concrete production useless slurry, the quality of useless slurry sample is weighed, Useless slurry sample solid content is determined using oven drying method, using useless slurry solid content calculation formula, useless slurry solid content correction factor is calculated；

Step 2, the measure of useless slurry solid content：

Useless slurry sample to be measured is chosen from the mixing plant concrete production useless slurry described in step one, is weighed each to be measured The volume and quality of useless slurry sample, the useless slurry solid content correction factor determined according to step one calculate public using useless slurry solid content Formula, calculates the solid content for obtaining each useless slurry sample to be measured.

The useless slurry solid content calculation formula is：

Wherein, ω is useless slurry solid content, and K is useless slurry solid content correction factor, and V is the volume of useless slurry, and M is the matter of useless slurry Amount.

Compared with prior art, the beneficial effect that technical scheme is brought is：

(1) present invention is determined by the amendment in advance to K values, calculated using the method for direct measurement volume and weight To the solid content of useless slurry, accurately, compared with traditional oven drying method, test result is more or less the same test result, and the test side The method time is short, efficiency high, can meet the requirement that useless slurry is utilized in concrete；

(2) method of testing step of the invention is few, and operating error is small, and can be used for the test of multiple samples simultaneously, saves Manpower and materials costs.

Embodiment

The invention will be further described below.

A kind of concrete production useless slurry solid content rapid assay methods of the present invention, comprise the following steps：

Step one, the determination of useless slurry solid content correction factor：

The useless slurry sample of certain volume is chosen from mixing plant concrete production useless slurry, the quality of useless slurry sample is weighed, Useless slurry sample solid content is determined using oven drying method, using useless slurry solid content calculation formula, useless slurry solid content correction factor is calculated. There is corresponding relation in the weight of the ready-mixed concrete production useless slurry of certain volume, dependency relation is shown in formula with solid content：

Wherein, ω is useless slurry solid content, and K is useless slurry solid content correction factor, and V is the volume (L) of useless slurry, and M is useless slurry Quality (g).

Step 2, the measure of useless slurry solid content：

Several useless slurry samples to be measured are chosen from the same mixing plant concrete production useless slurry described in step one, are weighed Go out the volume and quality of each useless slurry sample to be measured, the useless slurry solid content correction factor determined according to step one is contained using useless slurry Admittedly measuring calculation formula, i.e. formula (1), the solid content for obtaining each useless slurry sample to be measured is calculated.

When several useless slurry samples to be measured are derived from same mixing plant concrete production useless slurry, using the rapid assay methods The solid content of each useless slurry sample to be measured is determined, cited useless slurry solid content adjusted coefficient K is approximately uniform, therefore can be drawn With same useless slurry solid content correction factor, but regular calibration need to be carried out to K values (every 1 month or raw material quality ripple When dynamic larger)., need to be to different mixing plant concrete if several useless slurry samples to be measured take different mixing plant concrete production useless slurries Production useless slurry is sampled measure, obtains the useless slurry solid content correction factor of different mixing plant concrete production useless slurries, each treats Survey useless slurry sample and use its corresponding useless slurry solid content correction factor, the solid content of several useless slurry samples to be measured is calculated respectively.

Embodiment 1

Step one, the determination of useless slurry solid content correction factor

A useless slurry sample is chosen from the concrete production useless slurry of a mixing plant, the mass M of useless slurry sample is weighed It is respectively 1068g and 1L with volume V, it is 12.4% to determine useless slurry sample solid content ω using oven drying method, is calculated using formula (1) Useless slurry solid content adjusted coefficient K is 1.70.

Step 2, the measure of useless slurry solid content

3 useless slurry samples to be measured are chosen from the concrete production useless slurry of same mixing plant, each useless slurry to be measured is determined The volume and quality of sample, the adjusted coefficient K and formula (1) determined according to step one, calculate each waste liquid sample to be measured Useless slurry solid content, the comparing result of the useless slurry solid content determined with traditional oven drying method, see the table below 1.

The comparative determination result of the rapid assay methods of table 1 and traditional oven drying method

Embodiment 2

Step one, the determination of useless slurry solid content correction factor

A useless slurry sample is chosen from the concrete production useless slurry of a mixing plant, the mass M of useless slurry sample is weighed It is respectively 956g and 0.862L with volume V, it is 18.0% to determine useless slurry sample solid content ω using oven drying method, is utilized formula (1) It is 1.68 to calculate useless slurry solid content adjusted coefficient K.

Step 2, the measure of useless slurry solid content

3 useless slurry samples to be measured are chosen from the concrete production useless slurry of same mixing plant, each useless slurry to be measured is determined The volume and quality of sample, the adjusted coefficient K and formula (1) determined according to step one, calculate each waste liquid sample to be measured Useless slurry solid content, the comparing result of the useless slurry solid content determined with traditional oven drying method, see the table below 2.

The comparative determination result of the rapid assay methods of table 2 and traditional oven drying method

Although above, invention has been described, and the invention is not limited in above-mentioned, above-mentioned embodiment Only schematical rather than restricted, one of ordinary skill in the art can also make under the enlightenment of the present invention Many forms, these are belonged within the protection of the present invention.

Claims (2)

1. a kind of concrete production useless slurry solid content rapid assay methods, it is characterised in that comprise the following steps：

Step one, the determination of useless slurry solid content correction factor：

The useless slurry sample of certain volume is chosen from mixing plant concrete production useless slurry, the quality of useless slurry sample is weighed, utilized Oven drying method determines useless slurry sample solid content, using useless slurry solid content calculation formula, calculates useless slurry solid content correction factor；

Step 2, the measure of useless slurry solid content：

Useless slurry sample to be measured is chosen from the mixing plant concrete production useless slurry described in step one, each useless slurry to be measured is weighed The volume and quality of sample, the useless slurry solid content correction factor determined according to step one utilize useless slurry solid content calculation formula, meter Calculate the solid content for obtaining each useless slurry sample to be measured.

2. a kind of concrete production useless slurry solid content rapid assay methods according to claim 1, it is characterised in that described Useless slurry solid content calculation formula is：

$\mathrm{\ω}=K(1-\frac{990V}{M})\×100\%$

Wherein, ω is useless slurry solid content, and K is useless slurry solid content correction factor, and V is the volume of useless slurry, and M is the quality of useless slurry.