SU1704638A3 - Device for sealing hole formed in concrete wall after removing end coupling of formwork tying member - Google Patents

Abstract

The invention relates to the field of construction, in particular, to devices for sealing a recess formed in a concrete wall after the end coupling of the fastening element of the screed. The purpose of the invention is to increase the efficiency and reliability of the device. For this purpose, the housing 1 is made step, a step 3 of a smaller diameter with a threaded hole 4 for the clamping element, and a sealing element 7 made of elastic rubber material swelling in water is placed on this step. 1 hp f-ly, 12 ill.

Description

45 polyesters in a concrete wall according to the following general

after removing the end coupling of the stiffening form element, it includes a housing 1 made of synthetic resin in the form of a truncated cone with non-parallel bases. The housing 1 has a step 2 formed around the outer edge from the side of the extension element. By the ledge 2, the body is divided into a step 3 of a smaller diameter and a step of a larger diameter. Stage 3 of a smaller diameter is made centrally in its face surface with a thread hole, and, meanwhile, the stage of larger diameter has an upper 5 and lower 6 from

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formula:

k (UR) JP,

where K is the residue of polyhydric alcohols; (OK) is a polyoxyalkylene chain containing oxyalkylene groups, each having an oxyethylene group and an alkylene group carrying three or four carbon atoms, provided that the content of hydroxyethylene groups is from 24) to 100% of the total molecular weights;

n is the number corresponding to the degree of polymerization of oxyalkylene groups and gives the equivalent of a hydroxyl group of about 20 (1-2500; P represents a number from 2 to 8,

preferably from 2 to 4, together with a urethane polymer (sex igram), having polyisocyanate groups, a crosslinking agent and rubber, which is determined and followed by curing.

The following polyhydric alcohols can be used: dihydric alcohols (ethylene glycol and propylene glycol), trihydric alcohols (glycerin and trimethylpropane), tetrahydric alcohols (erythritol and pentaerythritol), pyatomic alcohols (arabitol and xylitol), and hexatomic alcohols (sorbitol and mannitol) ).

Polyether polyols can be prepared by adding alkylene oxide (s) to these polyhydric alcohols in such a way as to give the desired molecular weight. For this, either a random passivation addition or a passivation addition can be used. When the content of oxyethylene groups is less than 20%, the resulting material is unsatisfactory as a water-stopping material. Any of the polyisocyanates can be used. The content of terminal isocyanate groups may be 1-12%, preferably 2-7%.

Polyols and polyamines can be used, each not having two to six active hydrogen atoms per molecule and having an average molecular weight per active hydrogen atom of 30-15,000, for example, low molecular weight polyols, additive polymers of low molecular weight polyols. alkylene oxides and additive polymers of low molecular weight polyamines and alkylene oxides, as well as mixtures thereof.

Preferably, the elastic material contains 20-800 parts of the polyurethane resin coming into the state of swelling in water per 100 parts of rubber (rubber).

As elastic materials can be used materials that are obtained by further adding

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Q with

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a hydraulic material (s) to a composition containing the aforementioned newer resin swelling in water and rubber (rubber). As an example of hydraulic materials, Portland cement, slag cement, colloidal cement and gypsum can be. It is preferred to use a curing accelerator for cement containing at the same time calcium aluminate. A flexible material containing such a hydraulic material is advantageous in that it exhibits little shrinkage when dried. Preferably, this hydraulic material is mixed in an amount of 20-30 parts per 100 parts of a mixture of polyurethane swelling in water and rubber.

Said elastic material may further comprise suitable water-absorbing material (s). As water-absorbing materials, materials containing mainly & jb can be used an unsaturated compound that carries one or more carboxyl groups, or groups that have the ability, in addition, to be converted into such derivatives: carboxyl, carboxylate, carboxyl-imide, carboxylamide ; or a carboxyl-anhydride group, per molecule, and selectively polymerized with other 0, -saturated compounds (compounds) or modified with isocyanate (isocyanates), both individually and in combination bathing.

As examples of the water-absorbing resin, water-absorbing polymers can be used, such as graft copolymer, starch (acrylic acid, styrene copolymer / maleic anhydride salts, crosslinked sodium polyacrylate, vinyl ether), ethylenically unsaturated carboxylic acids, and washed. products of their derivatives.

Such an elastic material can be further vulcanized using a crosslinking agent such as sulfur.

The composition of this elastic material can be adjusted in such a way as to give the molded article a swelling ratio in water in the order of 10-350%, preferably 40-250%.

The sealing device (Lig.4) was left in the concrete wall after removing the end sleeve of the clamping element 11 of the formwork embedded in the concrete wall 12. The clamping element 11 has threads 13 and flanges 14 at its opposite ends.

The recess 15, which was previously filled with the END CLUTCH

element remains in the concrete wall 12 after the coupling has been removed.

After removing the formwork and the end sleeves of the shuttering elements of the formwork, at the completion of the erection of the concrete wall 12, the recesses remain in the concrete wall in the places corresponding to the position of the sleeves of the tensioning elements. The device is designed to seal each of these recesses 14. To do this, the device is inserted in a smaller diameter step into the recess 14 so that the threaded hole 4- is in the position of centered contact with the threaded end of the clamping member 11. Then the tool is inserted into the clutch in the holes 5 and 6 and by means of this tool the body 1 rotates so that

to enter into the gearing supplied JQ from elastic swelling in water

The hole 4 of this housing with the thread 13 of the clamping element 11 is threaded. The device case 1 is screwed onto the end of the clamping element 11 and fixed inside the cavity 15. The bottom 8 of the sealing element 7 of elastic swellable material together with its protruding edge 10 is installed against the depression 14 and when the body 1 is screwed on. The sealing element 7 is compressed between the bottom surface of the recess 15 and the shoulder 2 of the body 1 and consequently expands radially so that it is pressed against the peripheral surfaces like carbon Blenheim 15 and the body 1. Thus the sealing device 15 is a recess.

As a result, any amount of rainwater or moisture penetrating through the walls 12 into the gap between the recess 15 and the outer surface of the device housing 1 is filled with the material of the sealing element 7, which prevents further penetration of moisture into the wall 12.

When rain water or moisture reaches the gap between the recess 15 and the outer surface of the housing 1,

the material of the compactor 7 is brought into the state of swelling so that its opposite end surfaces are pressed against the bottom surface of the recess 15 and the step 2 of the housing 1, respectively, and the swelling of the axial direction is prevented. The sealing element 7 of elastic material is brought into a state of swelling in the radial direction against the peripheral surfaces of both the recess 15 and the housing 1, and reliably seals the gap defined between the recess 15 and the device, helping to prevent further penetration of water present in the gap wall 12.

In the device shown in Fig. 6, the protruding edge 10 formed on the bottom of the element 7 is made of an elastic material swelling in water, in the form of an annular ridge extending along the circumferential edge on the outer side of the bottom 8.

The device shown in Fig. 7 is characterized in that the annular ridge of the sealing element 7

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the material is located along a circle having a radius less than the radius of the outer surface of the element 7,

In the device shown in Fig. 8, the protruding edge 10 formed on the bottom 8 of the element 7 is made in the form of concentric ring-shaped ridges, each of which has a triangular cross section and extends along the circumferential edge on the outer side of the bottom 8.

In the embodiment of the device shown in Fig.9, the bottom 8 of the sealing element 7 is made flat without a protruding edge.

The device shown in FIG. 10 is characterized in that on the end surface the steps of reduced diameter of the housing 1 are made with an annular ridge.

The device shown in Fig. 11 is characterized in that the bottom 8 is removed from the sealing element 7, and the end of the step of reduced diameter of this element 7 extends beyond the end surface of the reduced diameter of the step of the housing 1 to form a protrusion 10.

These devices function similarly to the device in the first embodiment.

In these devices, the end surface of the reduced diameter of the sealing element 7 made of elastic rubber material swellable in water can be pressed into the bottom surface of the recess in contact mode along the ring line when the body 1 of each device is screwed onto the end of the form element 1 1. By placing such a contact along an annular line, the end surface of the reduced diameter of this device can be planted tightly, pressed against the bottom surface of the recess 15, even when the housing 1 is rotated with a relatively small force.

Figures 12 and 5 show a device in which the bottom is removed from element 7 so that the end surface of the reduced diameter of element 7 coincides with the end surface of the stage of reduced diameter of the housing 1.

The device (Fig. 5), fixed inside the recess 15, is screwed onto the housing 1 on the end of the transverse element 11, and the outer peripheral surface of the element 7 is pressed against the inner peripheral surface of the recess 15, while

opposite end surfaces thereof are pressed against the bottom surface of the recess 15 and the ledge 2 of the housing 1. respectively. Thus, the device seals the recess 15.

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F o rmu l invention

Claims (2)

1. A device for sealing a recess formed in a concrete wall after removing the end coupling of the shuttering form element, including a conical case, characterized in that, in order to increase efficiency and reliability in operation, the body is made stepwise, facing a smaller diameter to the fixed one element in this stage has a central threaded hole for connection with the clamping element, and on the end surface of the housing of larger diameter there are holes for the installation tool; a conical utyushchiy element placed on a smaller stage of the body and made of elastic rubber material swelling in water, the diameter of the inner surface of the sealing element being equal to the diameter of the outer surface of the smaller stage of the body and one end of the sealing element is installed with emphasis on the ledge of the larger stage and the other end of the element its inner surface is located at least at the level of the end of a smaller step. 2. The device according to claim 1, about tl and is the fact that the end surface of the sealing element extends beyond the end of a smaller stage of the body. fi 2 Ј M (b 8С9К) П i 6 Z Wtb , X g tncb 9 & 2 FIG #