LT4050B - Binding composition, containing anhydrite - Google Patents

Abstract

Invention covers the composition of an anhydrite binder. The composition consists of the following ingredients in mass percentage: phosphoric plaster - 80-90, neutralised glass slime or fertiliser slime neutralised by industrial acid wastewater - 2-10, clay - 5-15. Mechanical strength of the anhydrite binder after 28 days hardening is 51, 2-72, 1 Mpa. This composition is used for the manufacturing of construction materials.

Description

The invention relates to the construction industry and is used in the manufacture of construction products.

Known anbidritic binder composition containing the following ingredients! By weight: phosphogips 70-83, phosphocrate 15-25 and sodium silicon fluoride (Na2SiFg) 1-5, which is burned at 780-880 ° C (see former USSR). aut.liud no.1837055, TPK G 04 B II / 00, 1985).

The binder obtained from the known anhydrite binder composition does not exhibit the required strength and intense curing, especially at the beginning of curing, since the composition does not contain special activators.

The object of the invention is to increase the strength and hardening intensity of the anhydrite binder.

This object is achieved by the fact that the composition of the anhydrite binder consisting of phosphogypsum and calcium-containing additives contains the following ingredients, by weight:

Phosphogips: GaO 37, S0 ^ 54, SiO ^ 0.5,

^ 2 ^ 5 soluble in water ^ total θ ^{, ζ} ^ * ^ soluble in water

Neutralized Glass Slag (Panevezys Ekranas Plants): GaO 45.09, SiOg

- 90,

2.

13.97, SO ^ 5.05, R ₂ O ₃ (Na ^ My)) 10.01, ^ total ^, 75, Loss on ignition (K «n.) 21.40 or neutralized slurry from the acid effluent of the fertilizer industry ( Kėdainiai Chemical Works):

GaO 16.3-22.9, SiO ₂ 10.3-20.4, R ₂ 0 ₃ (Wa ₂ 0 + K ₂ 0) 29.6-31.1, S0 ₃ 5.9-8.8, P ^

6.9-13.7, P 6.2-13.7, K.n. 3-6 --- 2 - 10, ^ olis (Ignalina Dysna's quarry):

Si0 ₂ 52.10, Al ₂ 0 _{3 2} 17.20 .Ti0 (Na ₂ O4 K ₂ O) 7.91, CaO 5.61, MgO 3.98,

K ₂ 0 3.20, Ka ₂ 0 0.31, Kn _o 0.31 --- 5 - 15.

I. Example of Preparation of Anhydrite Binder Composition I t of phosphogypsum with a moisture content of 25% was neutralized with lime milk in the ratio liquid: solid 1: 1 to pH = 7.8 - ^, 2. 225 kg of clay with a moisture content of 20% and 55.5 kg of neutralized sludge with a moisture content of 48% were added to the neutralized phosphogypsum slurry with constant stirring. The resulting mixture was stirred for 10 min _. The submersible pump was then fed to a drum vacuum filter for filtration. The filtered mixture was incinerated in a typical rotary kiln at 95 ° G for 6-10 min. Total burning time in the oven 40 min. The burned granular material was milled in a ball mill to a leveling surface of 200-300 m / kg. The resulting anhydrite binder was mixed with water in the ratio water: binder 25: 100 (Y / A = 0.25). The plasticity of the resulting binder according to the Contract

3.

cm. The resulting samples of anhydrite binder were stored in a humid environment at a relative humidity of 95-100%.

2-9 Examples of Preparation of Anhydrite Binder Composition.

Analogously to Example I, prepared anhydrite binder compositions having the compositions and basic physical mechanical properties of the anhydrous binder are listed in Table I ·

For the comparison of the data, known anhydrite binder formulations with compositions and basic physical mechanical properties are given in Table 2 »

The data presented in Table 1.2 shows that the anhydrite binders obtained from the claimed anhydrite binder composition compared to the anhydrite binders obtained from the known anhydrite binder composition (see _also former USSR Auth. No. 1837055, TPK G 04 B 11 / 00, 1985), are significantly stronger and harden more intensively. Using gypsum, clay and neutralized sludges in the anhydrite binder composition, the combustion of the mixture results in reactions between the gypsum and the silica, aluminum and calcium oxides present in the additives, resulting in small amounts of minerals similar to cement - type PCaO.SiO ^, 3CaO.SiC> 2, 3CaO. Al gO ^. 0aS0 ^, which ensure fast binder hardening in the first days.

4.

Table I

Compositions of anhydrite binder compositions and physical mechanical properties of anhydrite binder

Example: ! - ^ nniariririio compositions ί mas _o % compositions of binder I,, Combustion -fc'osfo- plaster t. '' ^Hi ol To ** o Islam I Temperature, G I I UaikaSjmin t I 80 10th 10th 900 15th 2 85 5 10th 850 15th 3 90 5 5 850 30th 4 85 10th 5 900 30th 5 80 15th 5 950 15th 6th 90 8th 2 900 30th 7th 85 12th 3 950 15th 8th 90 5 5 850 15th 9th 85 10th 5 850 30th

5.

Continuation of Table I

Pa-! _________ ^ tigri ^ ąsžjiųiųiųių ^ ^MPMPMPMP _________________

Vyg ~ jP ° in a humid environment! Dry products

ί I P- To 3 P · At 7- 'p. To 28 · p.! | After 28 days I 11.8 13.1 18.6 35.3 70.2 2. n, 7 13.2 17.3 25.9 61.0 3 12.1 13.1 26.8 48.0 76.3 4 13.5 27.8 29.8 34.8 70.1 5 15.6 19.0 22.1 32.0 68.2 6th 13.2 15.6 21.5 32.0 64.1 7th 18.2 13.3 20.8 24.0 51.2 8th 11.3 13.0 24.9 42.0 72.1 9th 13.0 26, 5 29.2 32.5 68.6

6th

table

Known anhydrite binder (ex. USSR auth. Liud. _And No. 1,837,055, IPC C 04 B 11/00, 1985) of known compositions and compositions of anhydrite binder physical-mechanical properties

Pa- virgin dys ! Compositions of anhydrite binder compositions, ! % by weight ! Combustion Fos £ o- ' ! gypsum ί Phospho! Also ₉ SiP chalk! 4 temperature, ⁰ c I. 79 20th I 780 2 83 15th 2 780 3 70 25th 5 780 Table 2 Vol sequel Pa- t Compressive strength, MPa virgin dys to After maintenance in a humid environment! 8 _auS ! products ! 3 p.m. r 7 P.! 28th p. ! After 28 days I 4, θ 10.2 26, 5 53.1 2 4.7 13.3 30, 0 59.0 3 4.8 14.1 24, 49.0

Claims (1)

Definition of the Invention Anhydrite binder composition consisting of phosphogypsum and calcium-containing additives, characterized in that it contains the following ingredients by weight: losfogips --- 80 - 90, Neutralized glass slag or fertilizer industrial acid effluent neutralized slag --- 2-10,