CS232156B1 - Hydroretenční složení - Google Patents

Abstract

Hydroretention composition based on silicate binders and fillers is intended for preventing the penetration of liquid substances and water through silicate and ceramic materials. It consists of fast-setting gypsum-free cement with a high specific surface area, activating additives for regulating setting, thermomechanically activated silica fillers, integral hydrophobic additives, or crosslinking synthetic polymers. The composition is prepared for application by mixing with water or an aqueous dispersion of a synthetic polymer.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention

Methods known so far to prevent and eliminate leakage of liquids through cracks · Joints and leaks of building materials are based on various principles and are used according to specific conditions in a given state of technology · Most often a combined technological process is used in which pumped liquid is drained help wells formed below the surface of the penetrating liquid ·

Leak-proofing is then carried out for as long as the liquid is pumped off using asphalt coatings and insulating inserts in several layers. · The insulated surface is then secured against mechanical damage or surge due to pressure, plaster, etc. This method of liquid materials and often not feasible for operational reasons ·

Other methods of remediation are directed to fast-setting silicate sealants, where the solidification rate in the penetrating liquid environment is so high that within a few minutes, cement minerals are formed that impart the penetrating liquid. · According to D £ * PS 10 60 520, a combination of solidification regulators is used - calcium chloride, sulphite leaches, aromatic acids, water-soluble amines, etc., according to AT-PS 2 28 111 and Al * PS 2 37 604 monosaccharides and disaccharides of worbit with calcium chloride and ethylene oxide condensation product, according to Ffi-PS 14 21 557 / sodium nitrite with calcium chloride according to

- 2 232 156

JP-PS $ 7 «8-73 amorphous kaleium aluminate and kaleium halogenaluminate» according to DE-PS 19 29 884 combinations of aluminous cement and gypsum, etc. -PS 31 89 221 »US-PS 38 Ol 338» OE-PS 27 12 $ 81 »DE-PS26 12 007» DE-PS 28 11 419 »GB-PS 13 88 081 etc.)» All mentioned methods accelerate solidification and hardening Binders at different time intervals »but do not guarantee sufficient waterproofing» Water penetration and in most cases reduced but little leakage occurs · Such remediation is often only temporary effect »

The waterproofing composition according to the invention which, when mixed with water or the aqueous dispersion of the synthetic polymer, rapidly draws on a stable, stable, stable and impermeable product. The hydrotreating composition according to the invention contains a rapidly curing gypsum cement with specific surface area above 4000 cm ^ g * ¹ . thermomechanically activated quartz peak, integrally hydrophobic additives »especially metal soaps with a specific surface area above 10 * om ^ g ^ · The rate of retraction of the hydrorotonic composition can be controlled over a wide period of time by adding 0» 1 to 10.0% tactile · phosphoric acid »based on hydraulic binder»

Example 1

40 wt. gypsum-free cement with a specific surface area of 8000 © m ^ g * ¹ (Swiftcrete) »971% by weight of thermomechanically activated quartz sand» 2% by weight of eteS 2 «» 1 araau calcium with a specific surface area of 10 cm and 1% by weight of potassium potassium carbonate » After mixing, the mixture is stored in dry, airtight containers. The hydrotonic composition is prepared for use by mixing 100 parts by weight of dry mixture »parts by weight of water and about parts by weight of an aqueous dispersion of styrene-butyl acrylate-acrylic acid of 50% by weight. within 2 minutes and achieves strength after 24 hg <8

232 156 ▼ pressure 33 * 9 MPa and after 7 days 29 * 2 MPa vs 5,2 ΜΡ »resp ·

12.6 MPa with PC 400 o »The solidified material perfectly seals the leakage of liquids leaking through cracks in the building structure even at a pressure of 1.2 MPa ·

Example 2

25% by weight of cement according to GB-PS 14 64 160, 72% by weight of a thermomechanically activated silica quartz sand were perfectly homogeneous, 0.1 to 4.0 mm, 1% by weight of potassium sulphate and 2% by weight. · Mineral fibers up to 2 mm long · & 100 parts by weight of the blended mixture are added 15 parts by weight of water and 10 parts by weight of an aqueous dispersion of vinyl chloride * ethyl acrylate-methacrylic acid and 40% by weight of dry matter. solidifies within 3 minutes on a waterproof, impermeable and solid sealant with good adhesion to dry and wet substrates and with volume stability ·

Claims (2)

Hydroretentive composition for sealing building structures against the penetration of liquids based on hydraulic binders and mineral fillers, characterized in that it consists by weight of 20 to 65% gypsum-free cement with a specific surface area above 4000 cm g, 30 to 80% thermomechanically activated quartz sand , 1 to 5% of alkali metal acid salts, or 0.2 to 3.0% of integrally hydrophobic additives, especially 2 -1 currency of metal soaps with specific surface area over 10,000 cm g · 2. A hydrotreating composition according to claim 1, comprising 5 to 25 wt. synthetic polymers of the group of vinyl polymers and copolymers, acrylic polymers and copolymers, styrene and as copolymers, polyolefins and diene polymers and copolymers especially containing crosslinking components, preferably polymers of vinyl chloride-ethyl acrylate-acrylic acid-acrylamide, styrene-2-acrylic acrylate acrylate , styrene-butyl acrylate-acrylic acid or ethylene ethyl acrylate ·