The invention relates to the concrete pumping aid field, in particular to a low-cost concrete antifreezing pumping aid and a preparation method thereof. The concrete pumping aid comprises the following raw materials by weight percent: 20-30% of polycarboxylic acid water reducing agent of which solid content is 40%, 0.3-0.4% of air entraining agent, 0.9-2% of retarder, 11-15% of sulfonated acetone-formaldehyde condensate of which solid content is 36%, 6-10% of sodium lignin sulfonate, 2-4% of antifreezing component and the balance of water. The preparation method comprises the following steps:adding water, air entraining agent, polycarboxylic acid water reducing agent and sulfonated acetone-formaldehyde condensate in a container to heat to 45-55 DEG C, and stirring evenly; adding sodium lignin sulfonate in the container to stir, centrifuging to remove precipitate; and adding retarder and antifreezing component to stir evenly. The low-cost concrete antifreezing pumping aid has good performance; the composite indicators such as the antifreezing property, the pumping property, the water reducing ratio and the ratio of compressive strength are better than that of the antifreezing pumping aid which uses polycarboxylic acid water reducing agent or sulfonated acetone-formaldehyde condensate alone; and the antifreezing pumping aid in the invention has higher adaptability and good costperformance.

Low-cost concrete antifreezing pumping aid and preparation method thereof

The invention relates to the field of concrete additives and specifically relates to a mud content inhibitor for concrete doped with a polycarboxylic acid type water reducer and a preparation method and an application method of the mud content inhibitor. The mud content inhibitor is prepared by the following raw materials of, by weight, 20%-30% of mud dispersion components, 0.5%-5% of mud adsorption components, 0.5%-5% of ion complexation exchange components and the balance water. The preparation method includes firstly, uniformly stirring water and the mud dispersion components, and adding and uniformly stirring the mud adsorption components and the ion complexation exchange components. The application method includes that the usage amount of the mud content inhibitor is 2-5 wt. % of that of the polycarboxylic acid type water reducer. By means of the mud content inhibitor, the liquidity and the slump-retaining performance of the concrete can be increased, the viscosity of the concrete is reduced, the work state of the concrete can be improved, the adsorption quantity of high valence metal ions to the polycarboxylic acid type water reducer can be reduced, and the performance of the concrete doped with the polycarboxylic acid type water reducer is guaranteed.

Mud content inhibitor for concrete doped with polycarboxylic acid type water reducer and preparation method and application method of mud content inhibitor

The invention discloses an air entraining and water reducing agent, which comprises the following raw materials by weight: 33-46 parts of sulfanilate formaldehyde condensation polymer, 22-34 parts of melamine sulfonate formaldehyde condensation product, 14-28 parts of fatty methyl ester sulfonate, 6-12 parts of sodium nitrite, 12-18 parts of datolite powder, 3-5 parts of behenoxy dimethicone, 4-7 parts of disodium cocoyl glutamate, 3-6 parts of sodium lauroyl sarcosine, 6-9 parts of alkylphenol and oxirane condensation product, 4-7 parts of sodium abietate, 5-10 parts of pure acrylic latex powder, 8-14 parts of potassium dichromate, 3-6 parts of N, N'-methylene bisacrylamide, 5-10 parts of benzotriazole fatty acid amine salt and 4-8 parts of auxiliary agent. The air entraining and water reducing agent has good air entraining performance, water reducing performance, and enhancement effect, can obviously reduce concrete surface tension, improves concrete workability, increases the concrete fluidity, plasticity and breaking strength, reduces water segregation and separation, and increases concrete impermeability, freeze-thaw resistance and endurance performance.

Air entraining and water reducing agent

Aliphatic series high efficiency water reducing agent and preparation method thereof

The invention discloses a high-temperature retarding and water reducing agent prepared by mixing the following raw materials in parts by weight: 35-45 parts of polycyclic aromatic hydrocarbon sulfonated formaldehyde condensates, 20-30 parts of acyclic hydroxyl sulfonate condensates, 10-15 parts of diethylenetriaminepenta(methylene-phosphonic acid), 8-16 parts of calcium saccharate, 12-18 parts of alunite powder, 5-10 parts of xanthan gum powder, 4-8 parts of barium metaborate, 3-6 parts of sodium lauryl sulfate, 2-4 parts of pentaerythrite di-n-stearate, 6-12 parts of maleic anhydride-styrene sulfoacid copolymers, 10-15 parts of blast furnace slag powder, 5-10 parts of waste saccharide slag powder, 7-13 parts of nekal and 4-7 parts of auxiliary. The water reducing agent disclosed by the invention is excellent in high temperature resistance, relatively wide in applicable temperature range (150-250 DEG C), capable of reducing cement hydration heat release, reducing the temperature stress of the concrete, avoiding generating temperature cracks and completely meeting the construction requirement for high-temperature and high-pressure well cementation, suitable for continuously pouring mass concrete under a high temperature condition, remarkable in water reducing enhancement effect, good in slump loss resistance and wide in market prospect.

High-temperature retarding and water reducing agent

The invention provides a high performance water-reducing agent of sulfanilate-sulfonated acetone-formaldehyde condensate and process for preparation, wherein the water reducing agent water, p-aminobenzene-sulfonic acid or sulfanilate, sodium sulfite or sodium metabisulfite, acetone and methyl aldehyde, or charging water-keeping component, retardation component or gas guiding component, finally obtaining the liquid product through stirring homogeneously.

Ban Junsheng

Papers

High performance water-reducing agent of sulfanilate-sulfonated acetone-formaldehyde condensate and process for making same