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US 11,279,659 B2Granted
Fire-resistant two-component mortar system based on aluminous cement for a fire-resistant chemical fastening of anchors and post-installed reinforcing bars and use thereof
AssigneeHilti Aktiengesellschaft
InventorsArmin Pfeil, Anna Sharmak, Gregor Giessmann
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Abstract
A fire-resistant two-component mortar system, which includes a component A and a component B, which is in an aqueous-phase for initiating a curing process. Component A includes water, aluminous cement, a mineral filler, a plasticizer, and a blocking agent selected from phosphoric acid, metaphosphoric acid, phosphorous acid, and a phosphonic acid. Component B includes an initiator, a retarder, a mineral filler, and water,
Claims14
A method for a fire-resistant chemical fastening of anchors and post-installed reinforcement bars, the method comprising:
- mixing components A and B of a fire-resistant two-component mortar system comprising:
- a curable aqueous phase aluminous cement component A, and an initiator component B, which is in an aqueous-phase for initiating a curing process,
- wherein component A comprises water, aluminous cement, at least one mineral filler, at least one plasticizer, and at least one blocking agent selected from the group consisting of phosphoric acid, metaphosphoric acid, phosphorous acid, and a phosphonic acid,
- wherein component B comprises an initiator, at least one retarder, at least one mineral filler, and water,
- wherein i) the initiator comprises a mixture of at least two members selected from the group consisting of an alkali metal salt, an alkaline earth metal salt, and a combination thereof,
- ii) the at least one retarder is selected from the group consisting of citric acid, tartaric acid, lactic acid, salicylic acid, gluconic acid, and a mixture thereof
- iii) the at least one mineral filler is selected from the group consisting of limestone fillers, sand, corundum, dolomite, alkaline-resistant glass, crushed stone, gravel, pebble, and a mixture thereof,
- wherein the fire-resistant two-component mortar system has an initial set-time of at least 10 min,
- and wherein the fire-resistant two-component mortar system is operable for a fire-resistant chemical fastening of anchors and post-installed reinforcing bars;
- and injecting a mixture of components A and B into a recess in a mineral surface, and, thereafter,
- inserting the anchor or post-installed reinforcement bar.
8 more elements
A method of chemically fastening at least one of an anchor and a post-installed reinforcement bar in a mineral surface, the method comprising:
- setting at least one of the anchor and post-installed reinforcement bar in a borehole present in the mineral surface in the presence of an injected mixture of components A and B of a fire-resistant two-component mortar system, comprising:
- a curable aqueous phase aluminous cement component A, and
- an initiator-component B, which is in an aqueous-phase for initiating a curing process,
- wherein component A comprises water, aluminous cement, at least one mineral filler, at least one plasticizer, and at least one blocking agent selected from the group consisting of phosphoric acid, metaphosphoric acid, phosphorous acid, and a phosphonic acid and
- wherein component B comprises an initiator, at least one retarder, at least one mineral filler, and water,
- wherein i) the initiator comprises a mixture of at least two members selected from the group consisting of an alkali metal salt, an alkaline earth metal salt, and a combination thereof,
- ii) the at least one retarder is selected from the group consisting of citric acid, tartaric acid, lactic acid, salicylic acid, gluconic acid, and a mixture thereof
- iii) the at least one mineral filler is selected from the group consisting of limestone fillers, sand, corundum, dolomite, alkaline-resistant glass, crushed stone, gravel, pebble, and a mixture thereof,
- and wherein the fire-resistant two-component mortar system has an initial set-time of at least 10 min,
- wherein the fire-resistant two-component mortar system is operable for a fire-resistant chemical fastening of anchors and post-installed reinforcing bars;
- and
- curing the fire-resistant two-component mortar system, thereby increasing a load capacity of a cured resistant two-component mortar system.
9 more elements
Dependencies are inferred from the claim text.