Concrete admixture for roads

A concrete admixture and admixture technology, applied in the field of concrete, can solve problems affecting the quality and process of highway engineering, single admixture performance, improper use of admixtures, etc., to reduce wear rate, improve compatibility, and improve flow performance Effect

Inactive Publication Date: 2021-04-20
江西富创新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Method used

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  • Concrete admixture for roads
  • Concrete admixture for roads

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A concrete admixture for roads, characterized in that the admixture includes the following materials in parts by weight: 5 parts of triethanolamine, 8 parts of ethylene glycol, 2 parts of silicone defoamer, 15 parts of silicone anti-seepage and water repellent 15 parts, 15 parts of anti-wear agent, 3 parts of sodium nitrate, 1 part of polyolamine, 12 parts of isooctyl phosphate, 13 parts of emulsifier, 10 parts of triethylene glycol.

[0027] The antiwear agent is vulcanized rapeseed oil.

[0028] The preparation method of described organosilicon defoamer comprises the following steps:

[0029] 1) Reflux reaction of silicone oil and hydrophobic silica at 150-160°C for 1-2h to obtain white viscous silicone paste;

[0030] 2) Mix the silicone paste obtained in step 1) with graphene oxide modified silicone oil, silicon dioxide, allyl glycidyl ether and fatty acid, and then stir at 1000-2000r / min for 20-40min to obtain a prefabricated paste;

[0031] 3) Put the prefabrica...

Embodiment 2

[0036] A concrete admixture for roads, characterized in that the admixture includes the following materials in parts by weight: 15 parts of triethanolamine, 16 parts of ethylene glycol, 9 parts of silicone defoamer, 35 parts of silicone anti-seepage and water repellent 25 parts, 25 parts of antiwear agent, 3-19 parts of sodium nitrate, 10 parts of polymeric alcohol amine, 18 parts of isooctanyl phosphate, 15 parts of emulsifier, and 25 parts of triethylene glycol.

[0037] The antiwear agent is vulcanized lard.

[0038] The emulsifier includes sodium ligninate, nonionic surfactant and water.

[0039] The preparation method of described organosilicon defoamer comprises the following steps:

[0040] 1) Reflux reaction of silicone oil and hydrophobic silica at 150-160°C for 1-2h to obtain white viscous silicone paste;

[0041] 2) Mix the silicone paste obtained in step 1) with graphene oxide modified silicone oil, silicon dioxide, allyl glycidyl ether and fatty acid, and then s...

Embodiment 3

[0047] A concrete admixture for roads, characterized in that the admixture includes the following materials in parts by weight: 14 parts of triethanolamine, 15 parts of ethylene glycol, 8 parts of silicone defoamer, 30 parts of silicone anti-seepage and waterproofing agent 23 parts, 23 parts of antiwear agent, 10 parts of sodium nitrate, 7 parts of polyolamine, 17 parts of isooctyl phosphate, 14 parts of emulsifier, 20 parts of triethylene glycol.

[0048] The antiwear agent is vulcanized rapeseed oil.

[0049] The preparation method of described organosilicon defoamer comprises the following steps:

[0050] 1) Reflux reaction of silicone oil and hydrophobic silica at 150-160°C for 1-2h to obtain white viscous silicone paste;

[0051] 2) Mix the silicone paste obtained in step 1) with graphene oxide modified silicone oil, silicon dioxide, allyl glycidyl ether and fatty acid, and then stir at 1000-2000r / min for 20-40min to obtain a prefabricated paste;

[0052] 3) Put the pre...

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PUM

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B103/50C04B103/65
Inventor 刘立功滕景鹏魏德柱蒋忠
Owner 江西富创新材料有限公司
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