Water reducing agent and preparation method thereof, anti-freezing agent and purpose thereof, and concrete

Abstract

The invention provides a water reducing agent and a preparation method thereof, an anti-freezing agent and a purpose thereof, and concrete, which belongs to the technical field of freeze protection. The water reducing agent includes the following raw materials: isoamylenol polyoxyethylene ether and allyl alcohol polyoxyethylene ether, and at least one of acrylic acid and maleic anhydride, whereinthe molar ratio of the isoamylenol polyoxyethylene ether to the allyl alcohol polyoxyethylene ether is 1: (0.5-1). The anti-freezing agent includes the water reducing agent and non-oxidizing salts. The water reducing agent utilizes the isoamylenol polyoxyethylene ether and the allyl alcohol polyoxyethylene ether to perform cooperation as a water reducing agent synthesis monomer, under the synergistic effect of the two, the early strength performance of a product can be improved and the workability of the product can be improved, when the water reducing agent is applied to the anti-freezing agent, and since the water reducing agent is strong in early strength performance, usage of antifreezing early strength components in the anti-freezing agent can be effectively reduced.; and the anti-freezing agent is high in safety, is beneficial to reduce an alkali content in the concrete, and can effectively reduce the risk of bleeding of the concrete.

Description

technical field [0001] The invention relates to the field of antifreeze technology, in particular to a water reducing agent and a preparation method thereof, an antifreeze agent and its application, and concrete. Background technique [0002] When the temperature is lower than 0°C, the gradual freezing of water in the concrete will gradually stagnate the cement hydration, and the volume expansion caused by the freezing of water will damage the structure of the concrete hydration product. Appropriate concrete antifreeze is a concrete admixture that can continuously hydrate and harden concrete at negative temperatures, and achieve expected performance under specified curing conditions. Therefore, adding antifreeze to negative temperature concrete is a common technical means for negative temperature construction of concrete in winter. [0003] At present, the liquid antifreeze used in construction projects at home and abroad is mainly composed of water reducing agent, early st...

AI Technical Summary

Problems solved by technology

The above-mentioned antifreeze has the following prominent problems: 1. The antifreeze ingredients in common formulas are controlled products that are prone to poisoning and explosives, and their application is increasingly restricted; 2. The inorganic salts required to meet antifreeze and early strength are too high, and the alkali content is relatively high ; 3. Poor workability of concrete leads to adding water during construction, resulting in a high risk of freezing; 4. Bleeding leads to an excessively high water-binder ratio at the interface between aggregate and mortar, resulting in a high risk of freezing at the interface; based on this, the current water reducing agent and Antifreeze still needs improvement

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