Highway concrete admixture and preparation method thereof

Abstract

The invention discloses a highway concrete admixture and a preparation method thereof, and relates to the technical field of concrete. The highway concrete admixture is prepared from, by weight, 60-90 parts of industrial naphthalene, 40-60 parts of an entrainer, 54-81 parts of concentrated sulfuric acid, 39-59 parts of formaldehyde, 5-15 parts of triethanolamine, 8-16 parts of ethylene glycol, 15-25 parts of an antiwear agent and 3-19 parts of sodium nitrate. The preparation method comprises the steps of sulfonation reaction, entrainer addition, hydrolysis reaction, condensation reaction and neutralization reaction to finally obtain the product. According to the highway concrete admixture and the preparation method thereof, 1, 2-dichloroethane is used as an entrainer to produce a naphthalene-based superplasticizer, so that the use amount of sulfuric acid can be reduced, the performance of the concrete admixture is superior to that of a high-concentration water reducer produced by a lime method under the same conditions in neat paste fluidity or concrete tests, and the azeotropic method removes a filtering process so as to reduce the subsequent manpower and resource investment.

Description

technical field [0001] The invention relates to the technical field of concrete, in particular to a road concrete admixture and a preparation method thereof. Background technique [0002] Concrete admixtures, referred to as admixtures for short, refer to substances that are added to improve the performance of concrete before or during the mixing of concrete. Reasonable selection and use of admixtures in highway cement concrete engineering can improve the quality and durability of highway cement concrete and improve the performance of cement concrete. In particular, the naphthalene-based high-efficiency water-reducing agent has the characteristics of high water-reducing rate, little effect on setting time, no air-entrainment, good adaptability to cement, relatively cheap price, and can be used in combination with various other admixtures. It has a relatively high share in the superplasticizer market. [0003] At present, polycarboxylate high-efficiency superplasticizers on ...

AI Technical Summary

Problems solved by technology

[0004] But with an excess of H 2 SO 4 As a sulfonating agent, the sodium sulfate content in the product will be too high, and the presence of excess sodium sulfate can reduce some properties of the water reducer, such as weakening the dispersion performance of the water reducer; making the concrete mixture Negative effects such as increased slump loss

Images