Powdery accelerator for calcium-containing aluminosilicate cementing material

Abstract

The invention discloses a powdery accelerator for a calcium-containing aluminosilicate cementing material, composed of aluminum sulfate, sodium aluminate, lithium carbonate, amorphous silica and formaldehyde naphthalene sulfonate condensate, wherein the aluminum sulfate accounts for 45-65%, while the sodium aluminate accounts for 10-15%, lithium carbonate accounts for 3-7%, the amorphous silica accounts for 15-30% and the formaldehyde naphthalene sulfonate condensate accounts for 5-10%. Compared with the traditional powdery accelerator, the powdery accelerator provided by the invention has the advantage that the newly stirred slurry is high in viscosity, good in workability, low in disability in the spraying construction process, and good in adaptability to the cementing material with the compound accelerating mechanism.

Description

technical field [0001] The invention relates to a technology of aluminosilicate gelling materials, in particular to a powder accelerator for calcium-containing aluminosilicate gelling materials. Background technique [0002] The quick-setting agent is added in the concrete preparation process to make the concrete set and harden quickly after construction, which is indispensable for the construction of rapid traffic roads, mining, tunnel construction, water conservancy and hydropower projects, and rapid repair of buildings. [0003] The effect of the accelerator in concrete depends on the chemical composition and dosage of the accelerator, the mineral composition and content of cement, the type and content of gypsum, the type and amount of mineral admixtures, and the temperature during construction, etc. factors. The accelerating mechanism of accelerators on cement usually includes the following three types: (1) hydration products are formed through the reaction of their own...

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Problems solved by technology

The disadvantages of powder accelerators are uneven dispersion in concrete, large amount of

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