Chitosan sodium sulfonate containing concrete synergist and preparation method thereof

Abstract

The invention discloses a chitosan sodium sulfonate containing concrete synergist and a preparation method thereof, and belongs to the field of a concrete additive. The synergist comprises chitosan sodium sulfonate, inorganic base, an epoxy compound, (3-epoxy propoxy propyl) allyloxy dimethoxy silicane, an initiator and water, wherein the initiator is a mixture made from one or more than two of sodium persulfate, potassium persulphate or ammonium persulfate. The preparation method comprises: adding weighed chitosan sodium sulfonate, inorganic base and water to a reaction vessel, then adding the epoxy compound and (3-epoxy propoxy propyl) allyloxy dimethoxy silicane to the reaction vessel; and adding the initiator to obtain the concrete synergist. The synergist improves the dispersity of cement particles, stimulates the action of cement, allows the hydration reaction to be fully carried out, improves the comprehensive properties of concrete, raises the strength level of concrete, saves the concrete consumption by about 10%, and reduces the production cost of concrete.

Description

technical field [0001] The invention relates to the field of concrete-like additives, in particular to a concrete synergist containing sodium chitosan sulfonate and a preparation method thereof. Background technique [0002] Because of a series of advantages, such as superior plasticity, good water resistance, excellent durability and very competitive economy, concrete has become the most widely used material in the world. In the next few decades and the foreseeable future, it will still be one of the most important engineering structural materials, especially for contemporary China in the transition period, where industrialization is accelerating and urbanization is in the ascendant, and the scale of infrastructure will be higher than World average speed development. Ready-mixed concrete is the main form of concrete production so far, and more than 70% of the ready-mixed concrete has a strength grade of C25-C35. The improvement of concrete properties of this strength leve...

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Problems solved by technology

Research data on cement hydration degree at home and abroad show that about 20% to 30% of cement in concrete does not participate in the hydration reaction in conventional environments, and only plays the role of filling fine aggregates, which cannot effectively exert the strength of cement, resulting in great waste of resources

On the other hand, because different water reducing agents have different influence mechanisms on cement adsorption, etc., after being mixed to a certain extent, it is difficult to work on concrete again, and its economical efficiency and construction performance are difficult to be guaranteed.

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