JPS5832055A - Manufacture of inorganic hardened body - 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 (1) Main object of the invention 1-1 l) To provide a method for producing a high-strength inorganic cured body with excellent fire prevention performance and used as a building block. purpose.

(2) Conventional Example Inorganic hardened bodies mainly composed of Portland cement, blast furnace cement, and blast furnace slag develop large cracks when exposed to flame for a long time. There was also the problem that the reed strength was low, especially in the case of low specific gravity.

(8) Side aspect of the invention 1 This invention was made under the circumstances mentioned above, and consists of a composition containing slag (or) and blast furnace cement as main components, and stone bones mixed therein. It is characterized in that it is shaped in the presence of a polyester, and then cured at 40 to 60'C.

This invention will be explained in more detail below. Blast furnace slag, as well as cement, hardens in the presence of water, but as mentioned above, large cracks occur when exposed to flame for a long time, or if the specific gravity is low, the strength JU' is also low. There were some problems.

This invention attempts to solve the above problems by adding gypsum to slag or blast furnace cement.

When gypsum is mixed with slag etc. and subjected to a thermal reaction in the presence of water, it hardens and contains calcium aluminate monosulfate hydrate (3Ca
OeA 1yo0. @Ca SO, ・12H2o, hereinafter referred to as MSH), ettringite (hereinafter referred to as TSH)
is generated, improving the strength and waterproofness of the cured product. If the temperature of moist heat reaction, that is, heat curing, exceeds 600C, 'l'
The generation of S H is reduced and the generation of M S H is increased. ``If the H of H is low, the fire protection will be poor.

Therefore, the more TSH is produced, the better, and the curing temperature should not exceed 60°C.

In addition, if you heat it at 40C under 71.9 degrees, it will become almost hardened.Additionally, by adding slaked lime and aluminum hydroxide to the thread of slag chicken and I1'￥j, the fire protection will be further improved. .

Addition of stone 1: i: ji・ζ, (j1 streaks in slag etc. and double contamination ~ 20 months) is most likely. 2 it(: i
If it exceeds 1.1% by weight, a large amount of gypsum (remains) in the hardened body, and although it may not be fireproof, the gypsum easily comes out of the hardened body, resulting in poor water distribution. He's talented.
For slaked lime, 5f, j inscribed on all fIIF machine materials.
, M:% to 20 weight tIs% is preferable. Slaked lime has an effect of accelerating hardening on slag, but if it is only for accelerating hardening, it is fine to add 2 to 8 percent culm. The reason why we decided to add Ca (01
4) -CaO+ 1/2H0SCaO at 500°C or higher
1. This is because the dehydration effect at this time leads to an improvement in fire protection performance.

This kind of effect is less effective when the type group is less than 5%, and 2%.
If it exceeds 0% by weight, the strength of the cured product will decrease. In addition, for aluminum hydroxide, 2% to 30% by weight
It is clever to add % (relative to all non-isolated substances). Aluminum hydroxide reacts with the CaO component in the slag as well as excess stone and to produce hydrates such as MSH and TSH, thereby increasing the fireproofing performance, and also increasing the fireproofing performance of the hardened product. This will help improve your degree.Also, this 1.
A 1. It may remain after the female heart. It also aims to improve the fire retardancy by (OH). That is, A l
(For OH application, slowly dehydrate at 100°C or higher,
At 10°C, the water completely dehydrates, which is useful for fire prevention. In such circumstances, if the hl of aluminum hydroxide to be added is less than the lower limit of the above range, the desired effect will not be achieved.
If the amount exceeds 1, the body use of the cured product will decrease, and M
S HlT S H generation increases, and hardened product production n
, '1 has a large contraction and 12 [is not good.

In addition, in addition to the i'+j ratio 1 and 1, addition of sleeve reinforcing material, aggregate, etc. is 111.

(4) Examples Is the cured product formed by the above formulation and curing conditions? 1f.

7 ・7/ (72', 11N
KIn addition, Comparative Examples 1 to 2 and Examples 1 to 5 were made using the papermaking method, 9 Qcn+x 80crnx 1.2CJ
So, ρ=i, o.

A cured product was produced. Bulb and rock wool were defibrated and used. 'il
Miki 1- of +l1lz was used. Bending strength is 4×1
Head speed l station 7fn i for the size of 2 leaps
n, span 101, at+j was determined by autoclaving.

The presence or absence of TSL'11M5II formation was determined by X-ray diffraction.

The measurement conditions are 4Ql (V, 2Q Q m A, L jl
lle C0nstant Q, 5Full 5
cale tj at 4QQQcps/sec.

Fire protection performance is 22 atrr square sample at 60℃ x 24
After immediate treatment, use the interior combustion surface testing IA machine to
) was. The conditions are as follows.

Q~5m1n, Heater IKV 5~2Q min, Heater 1,5itv Floppan 0
, 82 swamps/m

Claims (1)

[Claims] (1) A composition containing slag and blast furnace cement as main components, mixed with stone fi.
A method for producing a 5++ (8b cured product) characterized by forming -Fl and then curing at 40 to 60 degrees (-).