JPH05345313A - Manufacture of lightweight soil mortar material - Google Patents

Abstract

PURPOSE:To surely contrive to improve quality and provide the manufacturing method of reliable lightweight soil mortar material by a method wherein the manufacturing of the material concerned is performed under the management of the unit volume weight of liquid mud charged in a mixer and the like. CONSTITUTION:The manufacturing method concerned consists of a unit weight measuring process S2, a correcting process S3, in which the deviation from the design unit volume weight is adjusted on the basis of the measured value by adding adjusting soil (e) or/and water (f), and an addition agent charging process S4, in which the usages of solidifying material (b), bubbles (d) and thickener (c) to the amount of adjusted liquid mud are calculated and calibrated on the basis of the design compounding ratio.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method 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 a component mixing test, and the soil is thawed with a thawer and kneaded with water to make mud, which is thickened with a solidifying agent. It is manufactured by charging and mixing a material and bubbles.

Specifically, an additive such as a thickener with respect to the amount of muddy water used is calibrated at a predetermined mixing ratio, introduced into a mixing chamber of a mixer and uniformly mixed. In this case, regarding the muddy water that is put into the mixing chamber, a method is used that controls the calibration or the amount of one batch used by the volume using an integrating flowmeter attached to the supply pipe, and the load chamber is used for the entire mixing chamber. There is a method in which the amount of muddy water input is converted into a weight and the amount is measured or controlled. As for the additive material with respect to the input amount of the muddy water, the thickener and the solidifying material are calibrated by weight, the bubbles generated by the foaming agent and the like are calibrated by volume, and a predetermined blending amount is introduced into the mixing chamber.

[0004]

However, according to the conventional manufacturing method, the specific gravity of the soil used is not constant even if the soil and water are muddy water prepared by the designed mixing ratio. The specific gravity of the muddy water produced in 1 is uneven, and the product has an accuracy proportional to the unevenness. Further, additive materials such as thickeners are blended with respect to the weight or volume of muddy water, and variations in muddy water specific gravity are not considered. Then, the lightweight soil mortar material produced in this manner, especially when used in water, for example, when used in the construction of civil engineering structures at the bottom of the water, a strict manufacturing machine is required, quality has been further controlled A manufacturing method is desired.

The present invention solves the above problems and is a lightweight soil mortar capable of improving quality and reliability by manufacturing while controlling the unit volume weight of muddy water put into a mixer. An object is to provide a method for manufacturing a material.

[0006]

In order to achieve the above object, the present invention provides a method for producing a lightweight soil mortar material in which muddy water, a solidifying material, air bubbles, and a thickener are added to a mixer and mixed. A unit weight measuring step for measuring the unit volume weight of the contained muddy water, a correction step for adjusting the deviation from the design unit volume weight based on the measured value by adding soil or / and water for adjustment, and adjusting It comprises a step of adding and adding the solidifying material, air bubbles, and the amount of the thickening agent to the amount of the muddy water calculated and calibrated based on the design mixing ratio and putting in the mixer. Further, as another manufacturing method, a unit weight measuring step of measuring the unit volume weight of the muddy water put in the mixer, and a soil for adjusting the deviation from the designed unit volume weight based on the measured value, and / or A correction process of adding water and adjusting, an amount adjustment process of removing mud as much as the design mud amount increased by the adjustment, and putting pre-calibrated solidifying material, air bubbles, and thickener into the mixer. And an additive material charging step.

[0007] In the above-mentioned structure, 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 or 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 a so-called foaming agent that generates bubbles due to a surfactant action, such as resin soaps, synthetic surfactants, and hydrolyzed proteins, and a 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, one whose phase composition such as the unit volume weight of the soil is known beforehand is used.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 3 shows a mixing chamber of a mixer used in the manufacturing method of the present invention. The weight of the mixing chamber 1 can be measured by a load meter 2 provided in the lower portion, and muddy water a, cement-based solidifying material b, thickener c, bubbles d are added, and soil for adjustment is added. e and water f are added as needed. The charged materials are mixed by the rotation of the stirring blades 3 to be homogenized, and then discharged to the agitator 5 by operating the opening / closing valve 4 in the lower central part and conveyed from the agitator 5 through the pump 6 and the pipe 7. To be done.

The muddy water a is prepared by mixing soil and water at a designed mixing ratio in the same manner as the conventional one, and the supply pipe 8
The total flow rate introduced into the mixing chamber 1 is measured and controlled by the integrated flow meter 9 and the electromagnetic valve 10 attached to the. The solidifying material b and the thickening agent c are calibrated by the load cells 11 and 12 for the required amount of input, and the open / close valves 13 and 14 are
And it is thrown into the mixing chamber 1 through the supply pipes 15 and 16, respectively. The bubbles d are generated from a foaming agent or the like by the dedicated foaming machine 17, pass through the supply pipe 18, and are discharged from the foaming device 19 installed in the mixing chamber 1. This discharge amount is measured or controlled by a flow meter provided in the dedicated machine 17 or the like. Soil e and water f for adjustment
Is 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 soil e is weighed by the load meter 20 and put into the mixing chamber 1 through the opening / closing valve 21 and the supply pipe 22. On the other hand, the water f is supplied through the flowmeter 24 and the electromagnetic valve 25 attached to the supply pipe 23 while controlling the required supply amount.

FIG. 1 shows a method for manufacturing a lightweight soil mortar material according to the first embodiment. Hereinafter, the main part of the method of the present invention will be described in detail with reference to the same drawing. The manufacturing method of the present invention is to manufacture the lightweight soil mortar material h through the muddy water charging step S1, the unit weight measuring step S2, the correcting step S3, the additive material charging step S4, and the discharging step S5. is there. In the muddy water feeding step S1, muddy water a is fed into the mixing chamber 1 through the supply pipe 8. The muddy water a is prepared in advance as described above, and a design usage amount corresponding to one batch is added. Further, the total amount actually input is measured by the integrated flow meter 9. The unit weight measuring step S2 is performed in the mixing chamber 1
Is a step of obtaining the unit volume weight of the muddy water a put in the above, and here, from the weight value G1 of the muddy water a measured by the load meter 2 and the capacity value Q1 obtained by the integrating flow meter 9, Calculated from Unit volume weight (t / m ³ ) = weight value G1 / capacity value Q1 ... (1)

In the correction step S3, when the value of the unit volume weight calculated from the equation (1) is deviated when compared with the design value, the deviation is adjusted by adding soil e or water f for adjustment. To do. In this case, when the injected muddy water a is larger than the design unit volume weight, the usage amount is calculated so as to be adjusted by using the water f, and the mixing chamber 1 is operated by the calculated amount of the water f. Then, the fluid is supplied while being controlled by the flow meter 24 and the electromagnetic valve 25. On the contrary, when the injected muddy water a is smaller than the design unit volume weight, the usage amount is calculated so as to be adjusted by using the soil e, and the usage amount is calculated by the load meter 20.
After calibrating in step 1, the mixing chamber 1 is put into the mixing chamber 1 through the opening / closing valve 21 and the supply pipe 22. By performing such an adjusting operation, the muddy water a in the mixing chamber 1 is corrected to a unit volume weight as designed, and the total weight thereof changes depending on the water f and the soil e used for the adjustment. The corrected weight value G2 of the muddy water a is measured by the load meter 2, and the value is used in the next step S4. The unit volume weight of the muddy water a can be adjusted by using the water f and the soil e at the same time, instead of using the water f or the soil e. Depending on the result of the unit weight measuring step S2, the unit volume weight of the muddy water a may match the design value. In such a case, the correcting step S3 is unnecessary and the next additive material charging step S4 is immediately started. . In the correction step S3, the motor M is appropriately driven to start mixing and stirring by the stirring blade 3.

In the additive material charging step S4, the mud a
Is a design unit volume weight, and the use amounts of the solidifying material b, the thickener c, and the bubbles d are calculated for the weight value G2,
Based on the calculation result, each additive is calibrated and put into the mixing chamber 1. The solidifying material b and the thickener c are load cells 11, 1
It is calibrated by 2 and introduced into the mixing chamber 1 through the on-off valves 13 and 14 and the supply pipes 15 and 16, respectively. The bubbles d are supplied by controlling the volume discharged from the foaming device 19.

Then, in the discharging step S5, all of the above additive materials are put into the Mikkin sig chamber 1, and when the stirring blades 3 perform stirring for a predetermined time, the muddy water a and each additive material are uniformly mixed and manufactured. The lightweight soil mortar material h is discharged to the agitator 5. 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. Further, the lightweight soil mortar material h in the agitator 5 is sent to a construction site or the like through the pump 6 and the pipe 7.

The manufactured lightweight soil mortar material h is adjusted so that the unit volume weight of the muddy water a introduced into the mixing chamber 1 matches the design value, and the additive material such as the thickener c is added. The unit volume weight of the product can be obtained almost according to the design value since the input amount of is adjusted to the adjusted muddy water, and at the same time, other properties such as viscosity are relatively controlled and approach the design value.

FIG. 2 shows a method for manufacturing the lightweight soil mortar material of the second embodiment. The manufacturing method of the second embodiment is the same as the manufacturing method of the first embodiment in the muddy water introducing step S1, the unit weight measuring step S2, the correcting step S3, and the discharging step S5. The difference is that the amount adjusting step S3-1 is added and the operation in the additive material introducing step S4 is different. Hereinafter, these differences will be described in detail. In the amount adjusting step S3-1, the excess amount of the mud water a in the mixing chamber 1 adjusted in the correcting step S3 is removed to the outside of the system in order to match the total amount with the design value.
This is because, in the correction step S3, the soil e and water f for adjustment are thrown into the mixing chamber 1, and as a result, the total weight thereof changes from the weight value G1 to the weight value G2 due to the water f and soil e used. Therefore, it means that a part of the muddy water a is removed from the mixing chamber 1 again so as to match the weight value G1. The amount of muddy water removed is such that the weight value G2 is proportional to the input amount of soil e or water f with respect to the weight value G1 unless the correction step S3 is omitted as described above.

In the additive material charging step S4 of the second embodiment, since the total amount of the mud water a in the mixing chamber 1 is controlled to the design value by the amount adjusting step S3, the solidifying material b, the thickener c, the bubbles d The amount of each used is calibrated based on the originally designed blending ratio, and is put into the mixing chamber 1. In the second embodiment, it is not necessary to calibrate each additive such as the thickener c based on the usage amount obtained from the calculation result as in the first embodiment, and each additive material is preliminarily based on the design mud amount. It is possible to calibrate and prepare. As a result, since the amount of product obtained for each batch is determined, quantitative management and shortening of manufacturing time can be achieved. As described above, the method of the present invention can be variously modified or expanded depending on the construction or manufacturing conditions.

[0017]

As described above, in the method for producing a lightweight soil mortar material according to the present invention, the unit volume weight of mud water charged into a mixer is adjusted, and a thickener is added to the adjusted mud water. Since it controls the input amount of additive materials such as, it does not require significant improvement in the device itself,
While relatively simple, it can improve both product quality and reliability.

[Brief description of drawings]

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

FIG. 2 is a process drawing showing another manufacturing method of the present invention.

FIG. 3 is a diagram schematically showing an example of a mixer used in the manufacturing method of the present invention.

[Explanation of symbols]

 1 Mixing room (mixer) a Muddy water b Solidifying agent c Thickener d Bubbles e Soil for adjustment f Water for adjustment

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[Procedure amendment]

[Submission date] June 19, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0004

[Correction method] Change

[Correction content]

[0004]

However, according to the conventional manufacturing method, the specific gravity of the soil used is not constant even if the soil and water are muddy water prepared by the designed mixing ratio. The specific gravity of the muddy water produced in the area varies, and the product has an accuracy proportional to the variation. Further, additive materials such as thickeners are blended with respect to the weight or volume of muddy water, and variations in muddy water specific gravity are not considered. Then, the lightweight soil mortar material manufactured in this manner is required to be a strict manufacturing material, particularly when it is used in water, for example, when it is used to construct a civil engineering structure at the bottom of the water, and the quality is further controlled. A manufacturing method is desired.

Claims (2)

[Claims] 1. A method for producing a lightweight soil mortar material in which muddy water, a solidifying material, air bubbles, and a thickener are charged into a mixer for mixing, and a unit weight for measuring the unit volume weight of the muddy water charged in the mixer. A measuring step, a correcting step of adjusting the deviation from the design unit volume weight based on the measured value by adding soil or / and water for adjustment, and a solidifying material, air bubbles, and a thickening agent for the adjusted amount of muddy water. A method for producing a lightweight soil mortar material, which comprises a step of calculating and measuring the amount of the agent used based on a design mixture ratio and adding the agent into a mixer. 2. A method for producing a lightweight soil mortar material in which mud water, a solidifying material, air bubbles, and a thickener are mixed in a mixer, wherein a unit weight measuring step of measuring a unit volume weight of the mud water put in the mixer. , A correction step of adjusting the deviation from the design unit volume weight based on the measured value by adding soil or / and water for adjustment, and removing the mud by an amount increased by the adjustment due to the adjustment The method for producing a lightweight soil mortar material, which comprises the step of adjusting the amount of the solid soil material, air bubbles, and a step of adding an additive material into a mixer.