JPH06811A - Manufacture of lightweight soil mortar material and apparatus therefor - Google Patents

Abstract

PURPOSE:To enhance the quality and hence obtain confidence by manufacturing a mortar material while directly controlling the unitary volume weight of slurry placed in a mixing chamber. CONSTITUTION:In the manufacture of a lightweight soil mortar material in which slurry (a) is put in a mixing chamber 1 by means of the supplier 3 of a supply pipe or the like 7 and, following this, a solidifying material (b), air- bubbles (d), thickener (c) and like substances are placed in the mixing chamber l, the supplier 3 has a control device 22 and, by the device 22, the unitary volume weight and flow rate of the slurry (a) running in the supply pipe are measured every moment and the slurry to be put into the mixing chamber 1 is evaluated by the measured value. Further, the difference to the designed unitary volume weight is controlled by adding if and/or water (g) to the mixing chamber 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing a lightweight soil mortar material used for construction of civil engineering structures.

[0002]

2. Description of the Related Art Among lightweight soil mortar materials, those having muddy water, cement-based solidifying material, thickener, and air bubbles as main components have been developed. This lightweight soil mortar material has a uniaxial compressive strength (kgf / c) designed according to usage conditions during construction.
m ² ), unit volume weight (t / m ³ ) etc. are determined through tests, the soil is thawed by a thaw machine and kneaded with water to make a muddy water. It is manufactured by adding a solidifying material and bubbles and mixing them. This manufacturing apparatus is mainly composed of a mixer, and is provided with a supply means for supplying muddy water to the mixing chamber.

4 and 5 show the main parts of an example of a conventional manufacturing apparatus. In the manufacturing apparatus shown in FIG. 4, a stirring blade 2 is provided inside the mixing chamber 1, and each supply means 3 for measuring the muddy water a, the solidifying material b, the thickening agent c, and the bubbles d, respectively, and introducing only a predetermined amount. , 4, 5, 6 are provided. The muddy water a is supplied by the supply means 3. The supply means 3 is a supply pipe 7.
It is composed of an integrated flow meter 8 and an opening / closing valve 9 attached to the, and measures or controls the amount of the muddy water a introduced into the mixing chamber 1. The solidifying material b and the thickener c are supplied to the supplying means 4,
Input by 5. Supplying means 4, 5 are load cells 10, 1
The input amount is calibrated by 1 and is input into the mixing chamber 1 through the opening / closing valves 12 and 13 and the supply pipes 14 and 15. The bubbles d are introduced by the supply means 6. The supply unit 6 is a dedicated foaming machine that generates bubbles d from a foaming agent or the like, and discharges a predetermined amount from a foaming device 17 installed in the mixing chamber 1 through a supply pipe 16. The manufacturing apparatus of FIG. 5 is different from the apparatus of FIG. 4 in that the weight can be measured by the load cell 18 provided at the bottom of the mixing chamber 1,
The difference is that the supply means 3 omits the flow meter 8.

Both of the above-mentioned devices measure the amount of the additive such as the thickening agent c with respect to the amount of the muddy water a charged at a predetermined mixing ratio, and feed it into the mixing chamber 1 for mixing. However, in the apparatus of FIG. 4, the input amount of the muddy water a is controlled by using the accumulated flow meter 8 or the like or the usage amount of one batch is controlled by the device, whereas in the apparatus of FIG. Load cell 1
8, the entire mixing chamber 1 is measured and the amount of mud introduced is measured or controlled by weight.

[0005]

However, in the conventional manufacturing method using each of the above-mentioned devices, even if the mud water a is prepared by adjusting the soil and water in a designed mixing ratio, Since the unit volume weight is not constant, the unit volume weight of muddy water produced varies, and the accuracy of the product is proportional to the variation. Further, the additive such as the thickening agent c is a compound with respect to the weight or volume of the muddy water a, and the variation as muddy water is not considered.

In the manufacturing process and products of mud preparation and soil mortar materials, the unit volume weight may be measured from the viewpoint of quality control, but the measurement is performed by measuring the amount of muddy water put in the mixing chamber 1 and the weight. Calculated from the value of
The testers (measurement using standard pycnometer, mud balance, electronic scale, etc.) were individually sampling method. However, all of these measurements take time to obtain the unit volume weight in a static state, and for example, there is a problem that it is not possible to respond instantaneously when there is a deviation from the design value in the manufacturing process. is there.

Further, the manufactured lightweight soil mortar material is required to be a strict manufacturing material, particularly when it is used underwater, for example, when it is used for construction of a civil engineering structure on the water bottom.
There is a demand for a manufacturing method and an apparatus therefor which are more controlled in terms of quality.

The present invention solves the above problems. By directly controlling the unit volume weight of the muddy water introduced into the mixing chamber, it is possible to improve quality and production efficiency, and to obtain reliability. An object of the present invention is to provide a method for producing a lightweight soil mortar material and an apparatus therefor.

[0009]

Means for Solving the Problems In order to achieve the above object, the present invention is to add muddy water to a mixing chamber by a supply means such as a supply pipe, and then add a solidifying material, air bubbles, a thickener, etc. to the mixing chamber. In a method for manufacturing a lightweight soil mortar material in which an agent is added and mixed, a quality control device attached to the supply means is provided, and the unit volume weight and flow rate of the muddy water flowing in the supply pipe are momentarily measured by the quality control device. At the same time, the gist is to evaluate the muddy water put in the mixing chamber based on the measured values and adjust the deviation from the design unit volume weight by adding soil or / and water for adjustment to the mixing chamber. As a device used for this, a lightweight soil mortar material equipped with a mixing chamber for introducing mud water by a supply means such as a supply pipe and for adding and mixing additives such as a solidifying material, air bubbles, and a thickener. In the manufacturing apparatus, the supply means has a quality control device capable of pumping the muddy water to a mixing chamber through a supply pipe and measuring at least the unit volume weight and the flow rate of the muddy water flowing in the pipe moment by moment. Is the gist.

In the above-mentioned construction, the muddy water is muddy water obtained by measuring the amount of dirt, sand, etc. removed from the soil generated at the site such as dredged soil and excavated soil, and then adding a predetermined amount of water or seawater. Used. The solidifying material is, for example, cement and cement mixed with an organic or inorganic material. Bubbles are formed by so-called foaming agents that generate bubbles due to a surfactant action, such as resin soaps, synthetic surfactants and hydrolyzed proteins, and by chemical reaction such as metal aluminum powder. And a so-called foaming agent that generates The thickener is for preventing material separation due to contact with water. As the soil for adjustment, use one whose phase composition such as unit volume weight and water content of the soil is known in advance.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows the mixing chamber of the mixer used in the manufacturing method of the present invention. In the figure, the same parts as those of the conventional device are designated by the same reference numerals, and duplicated description will be omitted. This mixing chamber 1 is provided with supply means 20 and 21 for adding the soil f and water g for adjustment as needed to the conventional apparatus, and the supply means 3 for supplying the muddy water a is the quality control device 22. It is different in that it has. The manufactured lightweight soil mortar material h is discharged to the agitator 24 by operating the opening / closing valve 23 in the lower central portion, and is conveyed from the agitator 24 through the pump 25, the pipe 26, and the like.

The soil f and water g for adjustment are used as necessary when adjusting the unit volume weight of the muddy water a introduced into the mixing chamber 1 to a design value. The supply means 20 for introducing the soil f measures the soil f with the load meter 26 and introduces it into the mixing chamber 1 through the opening / closing valve 27 and the supply pipe 28. On the other hand, the supply means 20 for supplying the water g supplies the water while controlling the required amount of the water via the flow meter 30 and the electromagnetic valve 31 attached to the supply pipe 29.

Further, the quality control device 22 measures the unit volume weight and flow rate of the muddy water a flowing through the pipe 7. FIG. 3 shows its schematic configuration. The quality control device 22 shown in the figure includes a measuring member 34 in the housing 32, which is communicatively connected to a part of the pipe 7 through a flexible member 33, and a holding member 35 which supports the measuring member 34. ,
Two load cells 36 for measuring the weight change applied to the measuring member 34 and the like are provided, and the unit volume weight of the muddy water a flowing in the pipe 7 is calculated. A flowmeter 37 is attached to the measuring member 34. The flow meter 37 is an integrating type electromagnetic flow meter or the like, and measures and displays the total amount of the muddy water a flowing in the measuring member 34. The flow meter 37 is
It is not essential for the quality control device 22, and it is possible to separate it from the quality control device 22 and separately attach it to the pipe 7.

The quality control device 22 uses the load cell 36.
A change in weight applied to the housing 32 is measured, and the measured value is directly measured as a unit volume weight of the muddy water a flowing through the portion L in the housing 32.
The value is displayed after being calculated by a processing unit or the like provided outside the computer. The unit volume weight of the muddy water a flowing through the pipe 7 is calculated by the following equation. Unit volume weight (t / m ³ ) = weight change G / volume of portion L The weight change G is the weight G1 of the muddy water a flowing between the portions L.
And the difference in weight G2 when the muddy water a is not flown (G1-G
2). Further, the volume of the portion L is confirmed in advance by calibrating with water or the like.

FIG. 1 schematically shows a method for manufacturing a lightweight soil mortar material using the above manufacturing apparatus.
The main part of the method of the present invention will be described in detail with reference to FIG. The manufacturing method of the present invention includes a muddy water feeding step S1, a muddy water measurement and muddy water evaluation S2 performed from the step S1 to the correction step S3, an additive material feeding step S4, and a discharging step S5. Is manufactured.

In the muddy water charging step S1, muddy water a is charged into the mixing chamber 1 through the supply pipe 7. This muddy water a
As described above, it is prepared in advance, and the design usage amount corresponding to one batch is input. At this time, with respect to the muddy water a to be introduced, the quality control device 22 measures the unit volume weight every moment, and the flow meter 37 measures the capacity to be introduced. In this case, in the muddy water measurement and muddy water evaluation S2, the unit volume weight of the muddy water a measured by the quality control device 22 (for example, sequentially calculated and displayed as the average value of the current input amount) is the designed unit volume. Compare or evaluate with the weight, and at the same time, enter the muddy water a
Know the accumulated amount of in real time. And, for example,
Assuming that the design input mud amount V used for one designed batch production amount is V, the soil f and water g added in the correction step S3 are calculated based on the current input mud amount and its average unit volume weight.
Adjusted input amount A such as is calculated in advance, the required actual input muddy water amount V ₁ (V ₁ = VA) is back-calculated, and the input of muddy water a is stopped when the actual input muddy water amount V ₁ is reached. To do.

The correction step S3 is, as a result of the muddy water measurement and muddy water evaluation S2, when the value of the unit volume weight of the muddy water a introduced into the mixing chamber 1 is deviated when compared with the design value, the adjusted input amount. Adjust according to A by adding soil f and water g for adjustment. In this case, when the injected muddy water a is larger than the designed unit volume weight, the usage amount is calculated to be adjusted by using the water g, and the flow meter 30 and the electromagnetic valve 31 are provided in the mixing chamber 1. Control and throw in.
On the contrary, when the injected muddy water a is smaller than the designed unit volume weight, the usage amount is calculated to be adjusted by using the soil f, and the usage amount is calibrated by the load meter 26. The mixing chamber 1 is charged through the opening / closing valve 27 and the supply pipe 28. By performing such an adjusting operation, the muddy water a in the mixing chamber 1 is corrected to the unit volume weight as designed, and the adjustment input amount A of the water g and the soil f used for the adjustment is as described above. Since it is reflected in the design input mud amount V, V ₁ + A = V.

The unit volume weight of the muddy water a can be adjusted by using the water g and the soil f simultaneously, instead of using the water g or the soil f. Also, the soil f for adjustment
Is a detailed understanding of its unit volume weight and water content. Depending on the results of the muddy water measurement and the muddy water evaluation S2, the unit volume weight of the muddy water a may match the design value. In such a case, the correction step S3 is unnecessary and the next additive addition step S4 is immediately started. It In addition, the correction step S
In 3, the motor M is appropriately driven to start mixing with the stirring blades 2, and the mixture put into the mixing chamber 1 is stirred and mixed.

In the additive feeding step S4, the amount of the solidifying material b, the thickening agent d, and the amount of the bubbles d, which have been calibrated in advance, are fed into the mixing chamber 1 based on the mixing ratio with respect to the design feeding mud amount V. The solidifying material b and the thickener d are calibrated by the load cells 10 and 11, and the open / close valves 12 and 13 and the supply pipe 1 are measured.
It is put into the mixing chamber 1 through 4 and 15, respectively. The bubbles d are introduced while controlling the volume discharged from the foaming device 17. The correction step S3 and the additive addition step S4 can be performed at the same time as the completion of the addition of the muddy water a by the above-described muddy water measurement and muddy water evaluation S2.

In the discharging step S5, when all the above-mentioned additives are put into the Mikkin sig chamber 1 and mixed by the stirring blade 2 for a predetermined time, the mud water a and each additive are uniformly mixed, which is a light weight product. The soil mortar material h is discharged to the agitator 24. One batch is completed by this step S5. At a construction site or the like, the amount of construction is secured by repeating the above steps S1 to S5. In addition, the lightweight soil mortar material h in the agitator 24 is
5 and the pipe 26 and the like to be sent to the construction site.

As described above, the manufactured lightweight soil mortar material h is adjusted such that the unit volume weight of the muddy water a introduced into the mixing chamber 1 is directly measured by the quality control device 22 and matches the design value. Therefore, the unit volume weight of the product can be obtained almost according to the design value, and at the same time, other characteristics such as viscosity are relatively controlled and approach the design value.

Further, in the manufacturing method of the present invention, since the quality control device 22 measures the unit volume weight and the integrated flow rate of the muddy water a to be introduced into the mixing chamber 1, it deviates from the design value. Sometimes the adjustment operation to correct it can be performed in real time, which is a rational work without waste. The method and apparatus of the present invention are not limited to this embodiment, and can be variously modified or developed except for the essential parts according to the quality conditions and the amount of construction.

[0023]

As described above, the method for producing a lightweight soil mortar material according to the present invention directly measures the unit volume weight of the mud thrown into the mixing chamber and designs the unit volume weight of the put mud. Since the value is adjusted to the value, it is possible to improve both the quality of the product and the reliability, and perform rational work without waste. Further, the apparatus of the present invention enables the manufacturing method of the above-mentioned lightweight soil mortar material, and does not require a significant improvement because only a quality control apparatus is attached to the conventional apparatus and is economically excellent.

[Brief description of drawings]

FIG. 1 is a process drawing showing the manufacturing method of the present invention.

FIG. 2 is a diagram schematically showing a configuration of a main part of a mixer which is a manufacturing apparatus of the present invention.

FIG. 3 is a cross-sectional view showing a quality control device provided in the device.

FIG. 4 is a diagram schematically showing a configuration of a main part of a mixer which is a conventional manufacturing apparatus.

FIG. 5 is a diagram schematically showing another example of the conventional manufacturing apparatus.

[Explanation of symbols]

 1 Mixing room 3 Muddy water supply means 22 Quality control device a Muddy water b Solidifying material c Thickener d Bubbles f Soil for adjusting g Water for adjusting

Claims (2)

[Claims] 1. A method for producing a lightweight soil mortar material in which muddy water is introduced into a mixing chamber by a supply means such as a supply pipe, and then additives such as a solidifying material, air bubbles, and a thickener are introduced into the mixing chamber and mixed. In the above, there is a quality control device attached to the supply means, and the quality control device measures the unit volume weight and flow rate of the muddy water flowing in the supply pipe moment by moment, and puts it into the mixing chamber according to the measured value. A method for producing a lightweight soil mortar material, which comprises evaluating muddy water and adjusting the deviation from the design unit volume weight by adding soil or / and water for adjustment to the mixing chamber. 2. A lightweight soil mortar material manufacturing apparatus provided with a mixing chamber for adding mud water by a supply means such as a supply pipe and for adding and mixing additives such as a solidifying material, air bubbles, and a thickener, The supply means includes a quality control device capable of pressure-feeding the muddy water to a mixing chamber through a supply pipe and measuring at least the unit volume weight and the flow rate of the muddy water flowing in the pipe moment by moment. Equipment for manufacturing lightweight soil mortar materials.