A kind of green high-early-strength low-alkali liquid accelerator and preparation method thereof
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An early-strength, quick-setting agent technology, applied in the field of building materials, can solve problems such as small market share, high price, and uncommon products, and achieve the effects of improving adhesion, high early strength, and high compact strength
Active Publication Date: 2021-08-06
JIANGSU CHINA RAILWAY ARIT NEW MATEIRALS CO LTD
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[0005] For the development of low-alkali or alkali-free liquid accelerators, my country's scientific research institutions and enterprises have carried out related work, but products with significant performance and mass production are not common, and the technology of related products is mainly mastered by a small number of multinational concrete admixture companies , but because of its high price, the domestic market share is small
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[0031] A method of preparing a low-alkali liquid spurgeon for spray concrete, including the following steps:
[0032] (1) Add water to the water bath container to 60 ° C to 70 ° C;
[0033] (2) Maintain the agitation state, and add fluorinated sodium fluoride and aluminum to the water;
[0034] (3) The stabilizer is slowly added dropwise with the constant current pump, ie the modified alkylamine, and the dropwise time is completed within 1 h-1.5 h;
[0035] (4) Keep the constant temperature, add aluminum sulfate, and stir it to completely dissolve;
[0036] (5) Transfer the above solution to the laboratory high-speed shear emulsifier, the suspending agent and the antifoaming agent are added, and the high-speed shear emulsifier is activated. The speed is adjusted to 3000-5000 r / min, and the emulsification is 0.5h-1 h. ...
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Abstract
The invention discloses a green high-early-strength low-alkali liquid accelerator. The components include: aluminum sulfate: (30-60%), sodium fluoride: (5-20%), alcohol Aluminum: (4‑10%), stabilizer: (3‑10%), suspending agent: (1‑5%), defoamer: (0‑1%), and the rest is water. A low-alkali liquid quick-setting agent for shotcrete of the present invention has the advantages of low alkali, no chlorine, no corrosion to human body and machines, no irritating smell, high early strength, high late strength retention rate, good durability, etc. , can greatly reduce the risk of concrete alkali-aggregate reaction and the erosion of reinforced concrete.
Description
Technical field [0001] The present invention relates to the preparation method of green high-speed low-alkali liquid spoosant, belonging to the technical field of building materials. Background technique [0002] In engineering construction, the sprayed speed condensed concrete is blended in concrete, which can quickly condense after the preformed concrete water is mixed, and reach a certain strength as soon as possible. At present, due to the high demand for the high requirements of domestic road and railway and other projects, the domestic speed coagulant products are rapidly transforming from the powder quickagulant to liquid quickagulants, and low alkali and alkali-free products are gradually replacing the tradition. Alkaline quickagulant. Among them, the traditional alkaline randoant has a high alkali content, strong corrosive, and has a large post-intensity loss, and the hardened concrete impermeability is different. The high base content usually corresponds to strong alkal...
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