Alkali-free setting accelerator containing coagulation and early-strength accelerator and organic amine substance and preparation method thereof

A technology of accelerating coagulation, early strength, and organic amines, applied in the field of alkali-free accelerators and their preparation, can solve the problems of increased strength retention rate, concrete structure damage, strong alkalinity of accelerators, etc., and can reduce expansion and cracking. Possibility, reduce the late strength loss, improve the effect of early strength
CN107857501AInactive Publication Date: 2018-03-30SICHUAN TONGZHOU CHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SICHUAN TONGZHOU CHEM TECH
Publication Date
2018-03-30
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses an alkali-free setting accelerator containing a coagulation and early-strength accelerator and an organic amine substance and a preparation method thereof. The alkali-free setting accelerator is characterized by comprising the following raw materials in percentages by mass: 35% to 50% of aluminum sulfate, 3% to 15% of magnesium sulfate, 0 to 15% of sodium fluoride, 0.125% to 0.5% of the organic amine substance, 1% to 5% of a thickening agent and 1% to 5% of a stabilizing agent, with the balance being water, wherein the mass percents of the components sum to 100%; and the organic amine substance is any one selected from the group consisting of triisopropanolamine, diethanolisopropanolamine and tetrahydroxyethyladipicdiamide. The preparation method comprises steps ofbatching, raw material mixing under stirring, and formation of a uniform and stable system. The alkali-free setting accelerator provided by the invention is alkali-free, has good cohesiveness, low resilience value, high later strength retention rate and moderate cost, can be extensively applied to construction of tunnels, culverts, sinking and driving engineering, etc., can realize large-scale industrial production, and has strong strong practicability.
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Description

technical field

[0001] The invention belongs to concrete admixtures used as building materials, and relates to an alkali-free setting accelerator containing an organic amine substance of a setting accelerator and an early strength agent and a preparation method thereof. The non-alkali accelerator containing coagulation accelerator and organic amine is especially suitable as an accelerator in shotcrete, and can be widely used in the initial support of railway and highway tunnels, water diversion culverts, mine shafts, and underground projects. Protection and final lining, repair and reinforcement of damaged works, foundation and slope works, thin shell structures and demolition works, etc. Background technique

[0002] Shotcrete does not need or only needs a single-sided formwork, and can make thin-walled structures in any direction. The process is simple, convenient and flexible, and has wide practicability; The time required for the slurry to become solid; initial setting ...

Claims

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