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Semi-flexible pavement cement-based adhesive cement composition and preparation method thereof

A semi-flexible pavement, cement-based technology, applied in the field of pavement materials, can solve problems such as incompleteness, and achieve the effects of prolonging service life, good fluidity, and improving comprehensive performance

Active Publication Date: 2021-04-16
广东省湛江公路工程大队
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the research on the technical index requirements of matrix asphalt mixture, cement-based mortar and semi-flexible pavement mixture in China is not thorough enough, especially in rainy and high-temperature areas, where there is a coupling effect between water and temperature, which affects the crack resistance of semi-flexible pavement. Performance, water damage resistance, construction technology and construction organization put forward higher requirements

Method used

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  • Semi-flexible pavement cement-based adhesive cement composition and preparation method thereof

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Experimental program
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Effect test

preparation example 1

[0033] Preparation Example 1 Inorganic Nano Hollow Particles

[0034] The preparation method is as follows:

[0035] S1. Add 100g Al(O-iC 3 h 7 ) 3 Dissolve 200g of methyl orthosilicate in chloroform, add 2g of composite coupling agent, stir and mix evenly to obtain an oil phase; the composite coupling agent is a combination of silane coupling agent KH560 and aluminate coupling agent DL-411 Mixture, the mass ratio is 1:2;

[0036] S2. Dissolving 1 g of porogen sorbitan fatty acid ester in water to obtain an aqueous phase;

[0037] S3. Add the oil phase into the water phase, emulsify for 2 min at 10000 r / min to obtain an emulsion, filter with suction, and dry at 100° C. for 2 h to obtain hollow inorganic nanoparticles.

preparation example 2

[0038] Preparation Example 2 Inorganic Nano Hollow Particles

[0039] The preparation method is as follows:

[0040] S1. Add 100g Al(O-sC 4 h 9 ) 3 Dissolve 300g tetraethyl orthosilicate in dichloromethane, add 10g composite coupling agent, stir and mix evenly to obtain oil phase; composite coupling agent is silane coupling agent KH590 and aluminate coupling agent DL-411 Mixture, the mass ratio is 1:3;

[0041] S2. Dissolving 5 g of the porogen polyethylene glycol octylphenyl ether in water to obtain an aqueous phase;

[0042] S3. Add the oil phase into the water phase, emulsify at 20000r / min for 4min to obtain an emulsion, filter it with suction, and dry at 120°C for 4h to obtain hollow inorganic nanoparticles.

preparation example 3

[0055] Preparation Example 3 Polymer Emulsion

[0056] Preparation method: Weigh 100g methacrylic acid, 50g butyl acrylate, 20g acrylic acid and mix evenly, then slowly add 1g Tween-80, 2gNaHCO 3 , the mixing system of 5wt% polyvinyl alcohol solution (containing polyvinyl alcohol 15g) and distilled water, with 300r / min rotating speed pre-emulsification 30min, emulsion is warmed up to 75 ℃, adds 2wt% initiator potassium persulfate solution (containing initiator Potassium persulfate 0.5g), stirred slowly for 1h to obtain a polymer emulsion.

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Abstract

The invention provides a semi-flexible pavement cement-based adhesive cement composition and a preparation method thereof, and belongs to the technical field of pavement materials, the semi-flexible pavement cement-based adhesive cement composition is prepared from the following raw materials by weight: 100-120 parts of cement, 20-30 parts of inorganic nano hollow particles, 5-30 parts of quartz sand, 1-5 parts of a polymer emulsion, 0.1-1 part of a thixotropic agent, 0.1-2 parts of an antifoaming agent, 0.1-0.7 part of an expanding agent and 150-200 parts of water; the particle size of the quartz sand is 0.5-2 mm; and the cement is 42.5 sulphoaluminate cement. The semi-flexible pavement cement-based adhesive cement disclosed by the invention is good in fluidity, good in rheological property of a whole system, relatively good in mechanical property, good in high-temperature rutting resistance, low-temperature cracking resistance, water damage resistance and fatigue resistance, and capable of prolonging the service life of a pavement.

Description

technical field [0001] The invention relates to the technical field of pavement materials, in particular to a semi-flexible pavement cement-based mortar composition and a preparation method thereof. Background technique [0002] Semi-flexible pavement refers to a kind of pavement compounded by pouring special slurry with cement as the main component in the base asphalt mixture with large voids (void ratio as high as 20%) that has been graded. The flexibility of the pavement and the rigidity higher than that of the asphalt concrete pavement are called semi-flexible pavement. Semi-flexible pavement has its unique advantages in terms of material strength mechanism. Different from ordinary asphalt concrete pavement, semi-flexible pavement belongs to dense-skeleton embedded extrusion structure. The strength and compactness formed by the cement mixed mortar filling the gaps together with the asphalt mixture skeleton structure can resist the effect of vehicle load and waterproof....

Claims

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Application Information

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IPC IPC(8): C04B28/06
Inventor 朱光达莫秋旭于宏明杨清尘吴观旺庄华森李周远吴小全朱兴劲朱堪威蒋勇潘雪菲肖法福
Owner 广东省湛江公路工程大队
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