JPH0612214B2 - Brick laying method - Google Patents

Description

The present invention relates to a brick-laying method used as a room temperature-curing mortar joint adhesive, of refractory mortar and acid-resistant mortar (hereinafter simply referred to as mortar), for example, high-sintered brick. It can be particularly effectively applied to bricks such as electro-fusion cast bricks, carbonaceous bricks, tars and synthetic resin impregnated bricks having extremely small or no water absorption.

Generally, brick laying is performed by using mortar as a joint adhesive. At this time, the kneading water (liquid) of the mortar at the joint is absorbed in the pores of the brick, the fluidity of the mortar is reduced, and the movement of the brick is reduced. Stop. The time until the brick does not move is called the adhesion time. By adjusting the absorption rate of the kneading water (liquid) into the pores of the brick, the adhesion time of the mortar is set to be optimal for the actual work. Generally, the setting of the adhesion time is about 1 to 5 minutes and is generally easy to use.

However, in bricks with no pores such as dense bricks and tar-impregnated bricks, the kneading water (liquid) is not absorbed inside the bricks, so the bonding time is extremely long, and in ordinary mortar, this should be adjusted. I can't. Various methods have been proposed to solve this problem.

The most commonly considered would be to set the mortar. A study was made to use a room temperature curing mortar. However, this must be used up before the kneaded mortar is cured at room temperature. For example, if the target is a bonding time of several minutes, the pot life will be less than that, and this method is difficult to work in practice and practical Hard to serve.

As an improvement measure, a method of previously coating a brick surface with a hardening accelerator is disclosed. However, the process of coating and drying the curing accelerator on the brick surface is complicated and uneconomical.
Moreover, since the reaction between the mortar and the hardening accelerator is only on the brick surface and does not extend in the thickness direction of the joint, it is practically not very effective for stopping the brick.

Then, the technique which reexamined the mortar itself fundamentally was disclosed next. By removing the fine powder portion and forming a discontinuous particle size constitution, the mortar is given a dilatant property.
Since work cannot be performed with this, a surfactant is added, and fine bubbles are introduced during kneading to impart fluidity. After the bricks are piled up, the bubbles are extinguished by the load of the bricks, returning to the original dilatant property and stopping the bricks. Is a unique idea. However, this idea also has the following drawbacks in reality,
Practical application is difficult. That is, the introduced air bubbles have poor stability and spontaneously disappear during storage and storage after kneading, so that the work change of the mortar is remarkable. On the contrary, the remaining bubbles in the joint are unexpectedly hard to disappear, and the dilatant property is used. Therefore, it is essentially impossible to completely stop the brick. Since the fine powder is excluded and bubbles are introduced, the joints become porous, leaving a problem in terms of corrosion resistance.

Recently, another technical study was made from the aspect of grain size. That is, this is a technique in which coarse aggregate is mixed with mortar and the coarse aggregate is allowed to bite into the brick to apparently stop the brick. However, in order to get coarse aggregate into the brick,
The bricks are inadequately stopped because they require a considerable amount of force and the joints do not essentially solidify. Further, the joint thickness is determined by the size of the coarse-grained aggregate and cannot be adjusted at all. Therefore, it is not possible to absorb the variation in brick size to the joint thickness.

As described above, although all the known techniques have fatal drawbacks, dense bricks, carbonaceous bricks,
The use of impregnated bricks and the like is gradually increasing due to their high corrosion resistance and the like, and it is the current situation that these bricks must be stacked by any of the above methods even at a great cost. In the case of this type of brick, the adhesion time cannot be set as finely as it is in the case of normal brickwork, and it is inevitably very long and extremely long, such as several tens of minutes to several hours.

The present inventors have examined the conventional techniques in detail, and the method of using a room temperature curing mortar is, except for the problem of pot life,
From the other aspects, it was confirmed that all were the best, and as a result of repeated investigations into whether or not the room temperature curing type mortar could be used, the present invention was achieved. That is, the present invention separates a room temperature curing type mortar into two parts, a mortar mainly containing a binder and a mortar mainly containing a curing accelerator, and kneading the two separately to obtain a conventional technique. To solve the problem of pot life that existed in
Furthermore, these two kneaded products are mixed and used as a joint adhesive,
By brick-laying, the mortar has room temperature hardening,
It stops the bricks.

The complexity of the construction work is such that the two mortars must be kneaded individually, and as the subsequent work, for example, a small toro box (temporarily storing kneaded mortar (toro), Take a small amount of the mortar after kneading in a container for storing the required amount of toro and put it in the hand of the furnace builder, etc., take approximately equal amounts of each, and gently mix with a trowel to mix (mortar in the toro box The work of mixing and kneading so that it is easy to use is a work standard that is generally used. ] Ordinary flooring toro (applying the mortar that has been kneaded to stack the next brick on the upper surface of the brick that has already been stacked), attached toro (painting the toro with the trowel in advance on the adhesive surface of the brick to be stacked) And perform brick laying.

When laying a toro on the upper surface of the lower brick, alternately apply two or more kneaded products of two or more, and put the brick on top to shake the upper brick to a predetermined joint thickness.

One of the two kneaded products is laid on the lower brick, and the other kneaded product is attached to the upper brick, and the brick-laying work is performed in the same manner as.

Work procedure such as is good. These are almost the same as the brick-laying work that is usually performed, and the complexity of the construction work is not a problem.

In the conventional construction method in which the hardening accelerator is applied and dried on the brick surface in advance, the work of applying the hardening accelerator is complicated as described above, and the brick is not stopped enough. This is probably because the hardening accelerator and the mortar are in contact with each other only on the brick surface and do not mix at all.

In the present invention, it is lightly handled with a trowel, a floor toro, a toro, joint thickness adjustment, and a work process that is almost the same as the conventional construction method, or simply shaking the brick to adjust to a predetermined joint thickness in general. Even in a typical work, the two refractory mortars mix and cause a hardening reaction without any practical problems, and stop and bond the bricks. It is considered that this is because both the curing accelerator side and the binder side are mortar, so that each has fluidity and is easily mixed.

The discovery of this fact is the key to the present invention.

When separating the room-temperature-curing mortar into two types, that is, a mortar mainly containing a binder and a mortar mainly containing a curing accelerator, various methods are conceivable, but basically, as the purpose of the present invention, First of all, the work life is long and the work is easy.

To describe the most general case, the composition is exactly the same except for the mixing agent and the curing accelerator, and on the one hand, only the binder,
Only the curing accelerator is added to the other. At this time, the compounding amounts of the binder and the curing accelerator are preferably the amounts in which the two mortars are mixed to give the original normal compounding amount, that is, double the amount. This is because it is most convenient when the mixing ratio of the two mortars is the same.

Alternatively, one may be mixed with a binder and a curing accelerator to the extent that the pot life is not a problem, and the other may be mixed with the remaining amount of the curing accelerator. Also, in the case of a binder that affects workability, fine aggregate powder or clay,
Alternatively, it is advisable to slightly consider the amount of the organic and inorganic workability adjusting material.

The aggregate material, particle size composition, binder, hardening accelerator, etc. are not particularly limited, and conventional techniques can be used.

Examples will be shown below, but the invention is not limited thereto.

Example 1 Silica stone 0.5 mm or less, Kibushi clay, powdered sodium silicate (binder), sodium silicofluoride powder (hardening accelerator, which has a great accelerating effect) and condensed aluminum phosphate powder (hardening accelerator,
Example 1 shown in Table 1 using the one having a small promoting effect)
Mortars (A) and (B) used for the above were prepared. The ratio is parts by weight and is the same below. This is obtained by separating the mortar of Comparative Example 1 shown in Table 1 into two types, a mortar containing a binder (A) and a mortar containing a hardening accelerator (B). I am taking into consideration a little.

Add water to the mortars (A) and (B), knead for about 5 minutes, and store separately. Immediately before use, the kneading mortar was weighed in equal amounts in a small Toro box, and easily troweled and mixed to perform a brick-laying test as a joint adhesive. The brick was an acid-resistant brick with a water absorption of 3% or less, and the joint thickness was 3 mm, and the bonding time was about 4 minutes. The kneaded products of (A) and (B) did not change in workability even if they were stored and stored until the next day. The mortar of Comparative Example 1 was kneaded for 5 minutes, then started to cure while being discharged from the mixer to the Toro box, and there was substantially no pot life. On the other hand, the mortar of Comparative Example 2 had no problem in terms of pot life, but the bonding time was extremely long, and the brick was not stopped even on the next day. The kneading time of mortar is usually about 5 to 20 minutes using a kneader.

Example 2 Sintered alumina 0.3 mm or less, Kibushi clay, powdered aluminum monophosphate (binder), magnesia powder (hardening accelerator)
Mortars (A) and (B) used in Example 2 shown in Table 2 were prepared with the organic sizing agent. This is also the second
The mortar of Comparative Example 3 shown in the table is separated. As in Example 1, water was added and the mixture was kneaded for 10 minutes. The kneading mortar of (A) is laid on the lower brick, and further on it (B)
Add an equal amount of kneading mortar of the above, lightly mix with a trowel,
I piled up the bricks in the upper row. The brick was an alumina fused-melt brick with a water absorption rate of 2% or less, a joint thickness of 2 mm, and an adhesion time of about 20 minutes. The kneaded mortars of (A) and (B) were sufficiently usable even after 6 hours had passed. The mortar of Comparative Example 3 was kneaded for 10 minutes, the adhesion time was measured to be about 7 minutes, and the pot life was only about 5 minutes. The mortar of Comparative Example 4 still did not stop the bricks the next day.

Example 3 Magnesia clinker 0.3 mm or less, carbon powder, bentonite, phenolic resin (binder), calcium hydroxide (hardening accelerator, small accelerating effect), paratoluene sulfonic acid (hardening accelerator, large hardening) Mortars (A) and (B) used in Example 3 shown in Table 3 were prepared. This is a separated mortar of Comparative Example 5 shown in Table 3 as well. (A),
Tall oil was added to the mortar (B) and kneaded for 20 minutes. Laying the kneading mortar (A) on the lower brick,
The kneading mortar of (B) was attached to the upper brick, and the bricks were stacked. The tar-impregnated brick with a water absorption rate of 1% or less, the joint thickness of 1 mm, and the bonding time were about 30 minutes. In the case of Comparative Example 5, the adhesion time was about 8 minutes and the pot life was 5 minutes or less. Comparative Example 6 also did not stop the brick at all after one day.

As is apparent from the above examples, since the present invention has no problem of pot life, the amount of the curing accelerator can be freely increased or decreased, the adhesion time can be set to a target value, and the brick does not absorb water. It is an extremely advantageous construction method for construction using.

Claims (1)

[Claims] 1. A brick laying method using mortar such as refractory mortar or acid mortar as a joint adhesive, which comprises a mortar mainly containing a binder and a mortar mainly containing a hardening accelerator. , Kneading each independently,
A brick-laying construction method characterized by using these two in a mixture during the brick-laying construction work thereafter, or by using these two so that they are in a substantially mixed state at the joints.