Gypsum perlite

FIELD: construction.

SUBSTANCE: gypsum perlite contains a gypsum binder, such as a processed mechanically activated phosphogypsum ground to 5-40 mcm (active gypsum), hydrophobizated swollen sand, superplasticiser Melflux at the following ratio of components, wt %: active gypsum - 84.8-93.8%, hydrophobizated swollen perlite sand - 6-15%, superplasticiser - 0.2%.

EFFECT: improved heat insulation and strength properties at low prime cost.

1 tbl

 

The invention relates to the field of construction, namely, building materials, and can be used for the manufacture of insulation products with bearing properties.

Famous raw mix for the production of insulation products containing, wt.%: expanded perlite sand 50-56; asbestos 4-33; astringent 17-40 and use binder composition, wt.%: quartz sand ground 70-85 and lime ground 15-30, or composition, wt.%: sand perlite expanded ground 70-80; lime ground 15-25 and gypsum powder 4-5 (patent SU 1818321 published 30.05.1993). The disadvantage of this mixture are low insulating properties.

Known mixture for the production of thermal insulating material containing expanded perlite, mineral binding, basalt fiber or fiberglass and polymer additives (inventor's certificate SU 726068 published 05.04.1980). The disadvantages of the above-mentioned mixture are low insulating properties and relatively high cost.

Closest to the proposed invention is a raw mix for the production of insulation products, which is known binder containing phosphogypsum and expanded perlite (inventor's certificate SU 1650640 published 23.05.1991). However, obtained from the specified raw material mixture the products have low insulating properties, and low strength.

The objective of the presented invention to provide products having high thermal insulation properties, high strength and low cost.

The technical result - improved thermal insulation and strength properties.

The technical result is achieved by the fact that the raw material mixture containing recycled and mechanically activated phosphogypsum (Hipschen) and gidrofobizirovannym expanded perlite sand, further comprises superprecipitation Melflux in the following ratio of components, wt.%: hipschen - 84,8-93,8; expanded perlite sand - 6-15; and superprecipitation - 0,2.

As a superplasticizer is used plasticizer Melflux.

Phosphogypsum mechanoactivated through aerodynamic actuators of any type, crushing him to 5-40 microns.

Hipschen mixed with perlite in appropriate proportions in the mixer (see table 1). The mixture can be mixed directly on the ground in front zatvoreniem or in stationary conditions with the subsequent packing. The zatvoreniem mixture occurs in the mixer immediately before use. Start time setting vipsania is 4-5 minutes upon completion of setting 8-10 minutes). When using gypsum perlite as a monolith to fill the walls or casting large items footprint of the em to use retarders gypsum.

As modifiers for circulite can apply a water-repellent agent: Ciprom C, Dew, NGL-11, HSC-1 and other water properties.

Hypsometrically concrete has high strength. For comparison, the gypsum perlite specific gravity of 0.8 (average specific gravity of all foam and aerated concrete, available on the market of construction materials) has a compressive strength of from 60 to 70 kg/cm2, while the above foam and aerated concrete does not exceed 35 kg/cm2. Has a high resistance (over 35 cycles), high moisture resistance and low thermal conductivity of 0.14 W/(m·K). For comparison, the red brick is 0.81, claydite-concrete 0,35, foam 0,26, timber wooden 0,18.

With the above properties hypsometrically concrete can be used as the main load-bearing wall material during construction, this wall can be made either by casting in a non-removable formwork and method of manufacturing the building blocks of gypsum perlite.

The gypsum perlite unit weight of 0,6-0,65 can be applied to the device the floor and the ceiling, low specific weight and low thermal conductivity of 0.13 at a sufficiently high strength allows to produce effective heat/noise overlap. The gypsum perlite specific gravity of 0.4-0.5 is used for effetive the insulation of roofs and floors. Its conductivity 0,08-0,09.

Table 1
ExampleMechano-
activerow.
phosphogypsum
Hydrophobe-
zeerovannyy
expanded perlite
the sand
MelfuxDensity,
kg/m3
Strength, kg/cm2thermal conductivity of
W/(m·K)
193,860,20,860-700,15
286,8130,20,6535-400,13
384,8150,20,458-100,09

The gypsum perlite containing gypsum binder and expanded perlite sand, characterized in that as gypsum binder use recycled crushed on the 5-40 microns and mechanically activated phosphogypsum, as circulite use gidrofobizirovannym expanded perlite and further comprises a superplasticizer Melflux in the following ratio, wt.%:
mechanically activated phosphogypsum - 84,8-93,8;
gidrofobizirovannym expanded perlite sand - 6-15;
superplasticizer is 0.2.



 

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