JPS5954652A - Lining material - 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 is directed to a dry-sprayed lining material for pipes, pipes, flues, etc.

Recently, a combined cycle Q'lf method has been adopted as a measure against the peak load of electric power demand ν.

This generation method is a method of generating electricity by combining a gas turbine and a steam turbine, and the fuel is 1.
G is mainly used.

The characteristics of this system are that it has extremely high thermal efficiency and is easy to turn on and off.

However, under this type of power generation method, the loss of exhaust gas per unit of output is large, and the pressure loss in the chimney □ and flue is immediately linked to the back pressure of the gas dubin, which affects the power generation efficiency. Chimney and flue lining materials with smooth surfaces with low loss are desired, and since the frequency of starting and stopping is high, a lining that has strong performance against repeated drying and wetting is required.

In response to these demands, conventional spray lining techniques
After spraying □ on the surface to be sprayed, simply scrape off the rough areas with a trowel to get rid of small irregularities □ and smooth the surface. If you forcefully use the trowel, cracks will form on the surface. Therefore, it may not be possible to do it at all, or even if it can be done, it will take a lot of time and effort.

Originally, dry spray lining (4 pieces) was mixed with a small amount of water in front of the nozzle and applied to the surface to be blown under high pressure. Table □
The surface has unevenness, and it is used as a lining material after being cured as it is, but the unevenness is only removed by troweling, which is called 91Y cutting, to make the thickness uniform.
The surface of the river was created by the tension of the trowel. Miku caused by getting it, getting stuck in the spray moon, some, and □ adhesion.

The current situation was that the four-fold unevenness was completely ignored. (4) In conventional spraying materials and blowing construction, when a smooth finished surface was not required, it was not possible to obtain a smooth finish (because of the A quality). Is it water-retentive? No, 14. After spraying the moisture condition, Table 1f (mouth 1. Either you can't expect a smooth rlii at all, or even if you spend 41 hours of time and effort, the effect is only one of the best.

In addition, in the case of this type of hydraulic cement-based spray material, the relationship between if, l' and actual time of construction was almost similar to Komachi's performance.

In order to solve these problems, the present invention uses a chimney lining system that has the strength of C, acid resistance and water resistance, and also has a lining A that has a smooth finish and easy surface after spraying.
This is the result of extensive research into g.

,! In other words, the present invention uses 40 to 60 wt% of aggregate containing 80 wt% or more of particles with a particle size of 0.84 arm or less, 1.5 to 5 wt% of night, and ultrafine siliceous powder 2 to B.
vrt seedlings, hydraulic cement 30-5 TtV;, 10-15 TtV for the hydraulic cement. , wt% of a cement swelling agent, and a lining material comprising a water reducing agent and water.

The roles and blending ratio ranges of each component of the lining material of the present invention are as follows.

In order to achieve a smooth finished surface, factors related to the particle size and water retention properties of the spraying material are very important, and in the present invention, 0.
40 to 60 wt%, preferably 45 to 55 wt% of bone phase selected from silica sand, cervene, and clay chamotte containing 80 wt% or more of particles with a particle size of 84 mm or less.
use. 80'wt% for granularity of 084 questions or less
The reason why the content is limited to the above is to facilitate finishing with a trowel, and if it is less than 80 wt%, the elongation of the trowel will be hindered. In addition, when the amount of bone phase is less than 40 wt%, relatively other components, i.e. As for the cause, 60W1,5γ or higher] 2 and I11 ~ conversely, 1111 (4, water retention 1't + l:l) -; 1 is small and lr effect 4P cannot wait until November.

Bentonai) Ir is used as a water-retaining material, and has the property of expanding 6 to 10 times, and its water-retaining properties:
It has the effect of improving the elongation of the iron by increasing it to 1.5.
vtt%1・71, below I, -i effect is small, ira
Used for l) If too much 1: is used, it will cause a crank due to shrinkage, so it is limited to 5wt, %1 or less.

Silica powder is selected from the following: used as cement component i+, 'U 4' 4, 40〆'iψ, irira force, ru 1, etc. This 1:j: 2 vy
If it is less than 6%, the effect of improving the physical properties of cement will be less than 6%, and if it is more than 8% (as with bentonite, the condensation line ゛・1 will become large and cause cracks to occur).

Hydraulic 1'10 ment is used as a binding material1. from alumina cement, portland cement, etc.; 9d fqJ: less than 30 wt% (tl
+, 'iS strength as a structure and l1lI acid water distributing properties are sufficient11) If it exceeds 50 it%, the above-mentioned bones and gaps become relatively small and shrinkage becomes large, causing cracks. becomes.

Cement expansion 'IA (t'1., lime-gypsum-alumina, system.

The compound used is: fL, its f', (11, water, 6, which is determined by the area in which the hydraulic cement is used, and the hydraulic cement,
If it is less than 10 wt % of the daffodil cement, the swelling effect will be small, and if it is more than 15 wt % of the daffodil cement, it will expand too much and cracks will occur.

The water reducing agent is 1. Smooth the sprayed surface (/scrub l;W,',
It is used to prevent cement from setting, to improve fluidity, and to make it easier to scrape with water.
I1. 1. -f Use polyalkylaryl sulfonate yarn, and in case of alumina cement &
J: 11 Use a Kuninsulfon branch salt type product'j
/: 1 o usage meter 1, effectively produces the above effect iMt
It is desirable that the content be 3 to 1.2 wt%.

Is the water blowing or 1j construction time vc? It costs 1 yen 8100,
It is desirable to do so.

In particular, the basis for determining the blending ratio of the water-retaining material (bentonite) and the dispersion material (7-liquid ultrafine powder), which are the characteristics of this lining material, is explained in Figures 1 to 4.
as well as:'? , 5 M ~ PI': 71% If:
I have a theory about it.

Bettonite is indispensable as A'4 stone to improve water retention and fluidity in order to achieve smooth finish in spraying construction. However, bentonite tit has the disadvantage that it has a high water absorption capacity, and its contractility is very high. j'u 11 to 1 is the range where the drawback does not have a large effect
According to Figure 4, it is 1.5 to 5W11% and is an Ir material, ρ,
1ro.

In addition, except for bentonite, white
'', this is the relationship when only the bentonite leaves are changed, with the value being a constant value.

The purpose of using ultrafine powder of silica is to sufficiently disperse the water (+'li) cement to increase its strength, to make the structure denser and to have a smaller core of water absorption, and to make it similar to bentonite. In order to improve the ζ function, the amount of dust was determined to be 2. to 8 wt% according to FIGS. 5 to 7.

In addition, in FIGS. 5 to 7, the values other than the ultrafine siliceous powder are kept constant, and the relationship exists when only ξ siliceous %'F Ta l'j) 144 is changed. Next, the lining material of the present invention Table 1 shows the general physical properties of one example.

As is clear from Section 2, -11, the dry spraying method according to the present invention, which can easily produce a smooth finished surface, has a higher surface finish than the conventional 1;4 night lining material. It can be seen that the roughness is small, so the friction tI4 coefficient of lapse is small, the compressive strength is high, the expansion and contraction properties are also good, and the material has extremely good properties in terms of texture, acid resistance, and penetration resistance.

[Brief explanation of the drawings] Figures 211-4 (・'', Ben 1's), 1 and compressive strength (Figure 1), shrinkage rate (pH', 2)', 1st surface II
Fig. 3), absorption rate (Q41・■), and Fig. 5 to 7 show the relationship between ultrafine siliceous powder and compression strength.
f',',, 5 Figure) 1. Shrinkage rate (r'rr6 diagram), f
lit water F% (q+, 7 +'Q+) and ノ1'
There is one table showing each of the %jl members. Figure 2 Amount of bentonite (wt%) Figure 5 Amount of bentonite (wt%) Figure 5 Amount of bentonite (wt%) Figure 6 Amount of silica powder (wt%)

Claims (1)

[Claims] 40 to 60 wt% aggregate containing 8□Owt% or more of particles with a particle size of 0.84 vn or less, 1.5 to 5 wt% bentonite
%, siliceous ultrafine powder '2-8 wt91;, hydraulic cement 30-50 wt%, a cement swelling agent of 10-15 wt% based on the hydraulic cement acid, and a water reducing agent and water.