JPS58146664A - Repairing of structure having gap part generated thereto - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for repairing architectural and civil engineering structures in which voids have occurred. ! Gaps refer to cracks that occur in the structure 1, for example, between the base layer and the surface layer, and cracks that occur in the base layer and the fi layer. : New that can be repaired! It provides 11 methods.

In the above-mentioned structure, various voids are generated during its formation or after use over time. In other words, the function of the structure will be significantly impaired if the voids in the structure are caused by cracks, lifting of surface treatment parts, crevices, etc. due to fluctuations in the supporting ground, temperature changes, or other causes. Conventionally, the method of repairing such a structure with a vacant BS was to inject and fill the void with liquid epoxy V resin. The Iruka method is easily affected by the presence of moisture, the temperature at the time of construction, etc. Also, G2 cannot be applied to cases where the voids are too large, and the pluggability is at most 2 to 31 degrees, so it is not always possible to expect a full repair effect. Shikoji<, Shimaka is extremely g: There are various drawbacks such as high repair costs.

Still another method is to press 4/jGJ2 into 5 using a piston pump or the like using a slurry filler t1 at a high pressure, but method C causes the object to deteriorate due to the high pressure. If it is, there is a risk of destruction, and there are still two problems with flow rate regulation, and accurate filling cannot be expected.

The present invention has been made to solve the above-mentioned drawbacks and to find a method for effective and accurate repair.

That is, the present invention is a structure: Created voids 5: Hydraulic cement) [7 Mainly powder 1 Synthetic polymer latex, additives, and water are kneaded to form a slurry-like filler using a pneumatic tube. The slurry-like filler in the present invention g2 has a viscosity of 100,000P8/
The temperature is 20° C. or lower, the water/powder ratio is 0 SIs to 0.40, and the air pressure for pumping is 0.3 to 3 Kq/edat 2BB.

#1 as a hydraulic cement in this invention-2
L, various Portland cements, blast furnace tops).

Alumina cement F), t/tsuka cement, slag cement, and floid cement 1 can be used, and this hydraulic cement is the main ingredient, as well as silica powder, i! sand.

Powder t is prepared by adding appropriate amounts of sand, cold water sand, organic/inorganic fibers, and water-soluble polymers.

In addition, as the synthetic polymer latex in the present invention,
Synthetic rubber latex such as styrene butadiene latex, Volic-tXa presilatex, acrylonitrile butadiene latex, polyvinyl acetate resin emulsion, ethylene-hinyl acetate copolymer resin, polyacrylic soap ester emulsion ν, and their co-products. Polymerization 1il
Various glaze resin emulsions such as i1 emulsion, polyvinyl acetate copolymer St sushi emulsion, etc. can be used, and antifoaming agents, anti-fresh copper, surfactants, female fixing agents, and IIJIF1 can be used.
1. Prepare a liquid with Th1illEI such as a hardening accelerator.

Next, when performing repair work, add an appropriate amount of water, then add the powder and apply fMli.
iI to obtain a slurry-like filler. The pot life of this slurry filler is approximately 1 to 5 hours.

- 10,000, Prior to repair work, install injection holes for the slurry-like filler in the target void at appropriate intervals, and at the same time install C2V old holes everywhere if there are cracks. Remove the seal to prevent filler from leaking! Apply it to the I side, and if necessary, perform a process to prevent peeling.

Two tongues are used to pump the slurry-like filler, and the air pressure is used to pump the slurry filling material. Through the nozzle tube cavity body G2, the injection hole at the bottom is filled with [7 voids]
Circle C: Fill by injection and fill sequentially from the upper injection hole.

The air pressure in the present invention is a comparatively low pressure, usually 0.3 to ah.
/dG de 艮<,g! There is no need for such pressure to destroy the gap.

In addition, when the tip nozzle of the primary injector is ≦:, it is desirable to attach a soft Wz material such as rubber to the joint between the injection hole and the nozzle. The cost of the injection hole is not particularly limited, and the cost is about $5 to $101.

The slurry filler preferably has a viscosity of 100,000 Ps/20°C or less and a water/powder ratio of 0.25 to 0.40.

Thus, since the present invention comprises the above-mentioned filling material and filling method, it is applicable to cases where the void is o, There is no risk of breakage, and since the flow tube is finely aligned, it can be smoothly injected into even the smallest gaps, and the curing reaction progresses even in the presence of moisture, making it easy to fill even the smallest gaps. ! The pipe has excellent features such as effective repair characteristic values, good workability, and low repair costs.

Example 1 An example of repair work for a floating part of an exterior wall mortar finish is shown. Outside the mortar finish W) Look for floating S by percussion with a hammer I
J Repair scope - Completely clear, clearly marked with chalk. It was a floating capital of about 3. Next, the grooves on the surface of the floating part @
was V-rued with paraffin rosin and fixed to the base concrete using an anchor bottle to prevent peeling and blistering of the 11π floating portion. Next, filler injection holes were drilled with a lO-φ drill at an average pitch of 400, and then additional holes were drilled at appropriate locations with an I:10-1 drill for air venting.

Add 20 parts of powder consisting of additives and Portland cement to a solution completely mixed with 4 s of butadiene latex (resin content: 50 ml) and 4 ml of water containing an am additive, and thoroughly knead to form a slurry-like filler. I got it. This filler has a viscosity of 400
00P8/10℃.

The water/flour 1 ratio was 0.3. Next, this filler is filtered through a wire mesh, and then passed through a syringe with fine flow rate adjustment from a pressure-feeding tongue using an air pressure of -0.7Kr/jG, and then into an injection hole below the liquid using a nozzle with a diameter of 10-φ attached to a rubber backing tube. Then, it was injected into the gap of the floating part, and the 11th injection was injected and filled from the upper injection hole. The injection proceeded smoothly, and no peeling or destruction of the floating layer occurred. 72 hours after the completion of injection and filling, percussion with a hammer confirmed that the entire floating part g: Wataru IJ was filled.

When the tensile adhesive strength was measured, it was 22KI after 28 days of age.
An example of repairing a raised gap between the concrete floor and finishing mortar layer.

Finishing mortar for concrete on the dirt floor? Then, I percussed the area with a hammer to find the raised part and determined the tIL range for repair.

In addition, cracks in the mortar layer were filled with polymer cement mortar. Reversal: Filler injection holes and air vent holes were drilled with an average pitch of 3001 using a 10-φ drill.

Added JiFIJt-containing ethylene vinyl acetate conjugate 9ay (Ilil fat content 5011) 4fflS
Water 51i$t? The combined liquid (20 parts of powder consisting of two additives and Portland cement) was combined into a slurry filling (25000PS/20°C, water/powder ratio 0.3).
$) and after filtering through this packed pipe network, 0.5"
Air pressure of /m()e - From the pressure feed tongue to the flow fine adjustment Note from the r# to the bore with the rubber backing attached 〇-
Filling was carried out sequentially from the injection hole at the end using the nozzle l2 of φ. Four weeks after the injection, the cores cut out from the earthen floor of the injection part at arbitrary 5:5 locations were observed, and the width of the floating width was 0.5 to 1.4.
1, the thickness of the mortar layer is B ~ 22-, and 'g!
All FA cities were filled with slurry-like fillings. In addition, during injection C: Destruction of the mortar layer was 1 zp.

Claims (1)

[Scope of Claims] 1. - Corpse C2 Created void 1Ijffll Im, Powder mainly composed of hydraulic cement 1 Synthetic polymer latex, Added jFIJm and Slat-shaped filler tube made by kneading with water. 1. A method for repairing a structure in which a void SV has occurred, characterized by using air pressure to pump air and filling the air through a syringe with adjustable flow rate. 2. Slurry filler has a viscosity of 100,000P8/20℃
Below, the water/powder ratio is 0.25 to 0.40, and the alternating pressure is 0.
．． 112. The method according to claim 111, characterized in that the material is pumped at a rate of 3 to 3/aJG.