Concrete non-alkali liquid quick-setting enhancer

Abstract

An alkali-free liquid quick-setting enhancer for concrete. The mass percentages of the materials used in the preparation are: 15%-32.5% of aluminum sulfate, 1.5%-5% of alcohol amine, 0.25%-1% of magnesium silicate, and amorphous aluminum hydroxide 7.5%~10%, formic acid 0.5%~5%, oxalic acid 0.5%~1.5%, pseudoboehmite 1.5%~2.5%, polyethylene glycol 5%~10%, amide 0.05%~0.15%, water 50% %; beneficial effects are: the present invention is liquid, good solubility, strong stability, long storage time; early strength increases rapidly, 1-day strength is above 8MP, 28-day strength without loss, and even improves the strength of some cement by 10 % to 30%; completely chlorine-free, alkali-free, non-toxic, and non-corrosive to steel bars; small dosage makes concrete set quickly.

Description

technical field [0001] The invention relates to a concrete additive, in particular to an alkali-free additive capable of quick-setting concrete and improving strength. technical background [0002] my country began to implement the JC477-2005 "Accelerator for Shotcrete" standard on August 1, 2005, which added technical requirements and experimental methods for liquid accelerators. This reflects the development trend of accelerators, that is, the transformation from solid powder accelerators to liquid accelerators. At present, liquid accelerators on the market have certain defects of their own: they are easy to precipitate when placed, resulting in a decline in quality; If the content is too high, it will corrode steel bars, cause too much damage to people, and also have a negative impact on the strength of concrete; if the content is too large, the concrete indicators will be unqualified; if the cost is too high, it is not suitable for mass production. Contents of the inv...

AI Technical Summary

Problems solved by technology

This reflects the development trend of accelerators, that is, the transformation from solid powder accelerators to liquid accelerators. At present, liquid accelerators on the market have certain defects of their own: they are easy to precipitate when placed, resulting in a decline in quality; If the content is too high, it will corrode steel bars, cause too much damage to people, and also have a negative impact on the strength of concrete; if the content is too large, the concrete indicators will be unqualified; the cost is too high, and it is not suitable for mass production at all.