Concrete admixture for roads

Abstract

The invention aims to provide an admixture for roads, wherein the admixture comprises the following substances in parts by weight: 5-15 parts of triethanolamine, 8-16 parts of ethylene glycol, 2-9 parts of an organic silicon defoamer, 15-35 parts of an organic silicon impermeable waterproof agent, 15-25 parts of an antiwear agent, 3-19 parts of sodium nitrate, 1-10 parts of polyalcohol amine, 12-18 parts of isooctyl alcohol phosphate, 13-15 parts of an emulsifier and 10-25 parts of triethylene glycol. The admixture can prevent concrete cracks from closing and accelerate crack propagation, can form an unstable complex with calcium ions in cement, reduces the calcium concentration, has a strong retarding effect, improves the flowing property of cement paste, and plays a role in improving the compatibility of cement and a water reducing agent; and finally, after the concrete is added, the slump degree and the abrasion rate are reduced, the compressive strength, the flexural strength and the shrinkage rate are improved, and the admixture is more suitable for road concrete.

Description

technical field [0001] The invention relates to the field of concrete, in particular to a concrete admixture for roads. Background technique [0002] 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, but at the same time, the quality and process of highway engineering are affected by improper use of admixtures or quality problems of admixtures Accidents often occur. [0003] The performance of existing admixtures is often very single, and the concrete used in roads has high requirements for its slump, compressive strength, flexural strength, shrinkage rate and wear rate, which means that the requirements for admixtures are further increased. improve. [0004] The inventor tried to simply mix and superimpose various admixtures and found that the effect was mediocre, or even better than that of separate use. The existing composite ...

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Problems solved by technology

[0002] 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, but at the same time, the quality and process of highway engineering are affected by improper use of admixtures or quality problems of admixtures Accidents often occur

[0003] The performance of existing admixtures is often very single, and the concrete used in roads has high requirements for its slump, compressive strength, flexural strength, shrinkage rate and wear rate, which means that the requirements for admixtures are further increased. improve

[0004] The inventor tried to simply mix and superimpose various admixtures and found that the effect was mediocre, or even better than that of separate use. The existing composite admixtures generally use high-efficiency water reducers as masterbatches, and are compounded with materials with other properties. It is an admixture that can adapt to various cements, but most of the existing composite admixtures are not suitable for road cement

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