Patent ID: 11878942
Assignee: SIKA TECHNOLOGY AG
Field: Materials, metallurgy (Chemistry)
Classification: CPC C  Y | IPC C

Claim 13:
14. A method for jointing of porous materials, the method comprising the steps of
a) providing a component A that comprises:
i) 15-69 w % of at least one ordinary Portland cement (OPC),
ii) 1-25 w % of at least one cement selected from calcium aluminate cement (CAC) and/or calcium sulfoaluminate cement (CSA),
iii) 0.1-15 w % of a powder P, selected from the group consisting of carbonates or hydrogen carbonates of alkali and/or alkaline earth metals,
iv) optionally 30-70 w % of aggregates,
v) optionally 1-15 w % of other additives selected from the group of plasticizers, superplasticizers, rheology modifiers, retarders, air-entrainers, de-aerating agents, corrosion inhibitors, fibers, synthetic organic polymers, expansion producing additives, pigments, strength enhancers, waterproofing additives, alkali-aggregate reaction inhibitors, chromate reducers, and/or anti-microbial agents,
each based on the total weight of the component A,
b) providing a component B that comprises:
vi) 30-90 w % of at least one accelerator selected from the group consisting of alkanolamines, halides, formats, acetates, oxalates, nitrites, nitrates, thiocyanates, sulphates, thiosulphates, glycerol, (α-hydroxycarboxylic acids, and calcium aluminates,
vii) 0.1-5 w % of an anti-freeze agent which is selected from the group of sodium chloride, urea, and glycols,
viii) 10-70 w % of water, and
ix) optionally other additives selected from the group of plasticizers, superplasticizers, rheology modifiers, retarders, air-entrainers, de-aerating agents, corrosion inhibitors, fibers, synthetic organic polymers, expansion producing additives, pigments, strength enhancers, waterproofing additives, alkali-aggregate reaction inhibitors, chromate reducers, and/or anti-microbial agents,
each based on the total weight of the component B,
c) mixing component A and component B in a weight ratio of from 50:1 to 1:100 to obtain a mixed composition,
d) optionally pretreating one or more of the surfaces of the porous materials to be joined, and
e) placing of the mixed composition on the one or more surfaces of the porous materials.