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A kind of cement asphalt mortar and preparation method thereof

A technology of cement asphalt and mortar, which is applied in the field of cement asphalt mortar and its preparation, which can solve the problems of adding troubles to the structural design of mixing trucks, inconvenient production and transportation, and incomplete defoaming, so as to reduce the amount of additional water and extend the working time. Time, the effect of avoiding the phenomenon of large bubbles

Active Publication Date: 2014-10-15
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The process of preparing mortar is carried out in a mixer truck, which is an intermittent operation. Due to the small amount of defoamer and water reducer, it is difficult to control the measurement accurately, and even if it is stirred quickly, the distribution of the two in the mortar It is also difficult to be uniform. Once the measurement is wrong or the distribution is uneven, it will affect the properties of the mortar. The main performance is that the defoaming is not complete. When the mortar is poured, more air bubbles will be accumulated under the four corners of the track plate. Insufficient strength of the corners
In addition, in order to make the high-iron emulsified asphalt mixed with a large amount of cement and fine sand not to be demulsified during high-speed stirring, and to have a certain strength against mechanical damage, generally when producing high-iron emulsified asphalt, the amount of surfactant will be If the emulsified asphalt is very large, it is easy to produce a large amount of foam during the production and loading of high-speed rail emulsified asphalt, occupying a large space in the product tank. If the operation is not done properly, the emulsified asphalt foam will easily emerge from the tank mouth, which will cause inconvenience to production and transportation.
In addition, if the foam of the emulsified asphalt is too much, a thick skin will be formed after the foam disappears. This skin is formed by linking the asphalt components on the foam after the foam disappears, and it can no longer be emulsified even if it is stirred. , so it will affect the properties of emulsified asphalt, especially the index of remaining amount on the sieve, and even easily lead to the demulsification of emulsified asphalt
In addition, adding defoamer and water reducing agent at the construction site is cumbersome, which affects the construction progress and adds trouble to the structural design of the mixer truck

Method used

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  • A kind of cement asphalt mortar and preparation method thereof
  • A kind of cement asphalt mortar and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Take 6480g of Liaohe crude oil straight-run asphalt with a penetration of 108 (1 / 10mm) and heat it to 115°C for use. Take 50 g of cationic emulsifier cetyltrimethyl ammonium chloride, anionic emulsifier fat (18) alcohol polyoxyethylene (3) sodium ether sulfate 50 g, zwitterionic emulsifier N-coco-β -10 g of sodium aminopropionate, 10 g of non-ionic emulsifier oleyl alcohol polyoxyethylene (20) ether, 1 g of carboxymethyl cellulose, 5 g of calcium chloride, dissolved together in 3377 g of water not lower than 45℃ After it is fully dissolved, add 10 g of calcium lignosulfonate and 7 g of methyl silicone oil (303-20), stir well, prepare a soap solution for later use, and keep the temperature not lower than 40°C. Then the soap and bitumen are transported to the colloid mill respectively, and after being evenly dispersed and ground by the colloid mill, it becomes an oil-in-water emulsion, and then flows out from the outlet of the system when the emulsion temperature is reduce...

Embodiment 2

[0050] Take 6000g of Oman crude oil solvent deoiled asphalt from Maoming Petrochemical Company with a penetration of 98 (1 / 10mm) and heat it to 125°C for use. Take 90g of cationic emulsifier hydrogenated tallow propylene triamine, anionic emulsifier fat (18) amine polyoxyethylene (4) sodium sulfate 195g, zwitterionic emulsifier N-tallow-β-iminodipropionic acid Disodium 69 g, non-ionic emulsifier octyl phenol polyoxyethylene (20) ether 50 g, carboxyethyl cellulose 5 g, ammonium chloride 15 g, dissolve together in 3,531 g of 65°C water, until the emulsifier is sufficient After dissolving, add 40g of naphthalenesulfonic acid formaldehyde condensate and 5g of polyoxyethyleneoxypropyleneglycerin (GPE30), stir well, prepare into soap solution and keep the temperature at 65℃. Then the soap and bitumen are transported to the colloid mill respectively, and after being evenly dispersed and ground by the colloid mill, it becomes an oil-in-water emulsion, and then flows out from the outlet...

Embodiment 3

[0052] Take 6200g of Kuwait crude oil oxidized pitch from Qilu Petrochemical Company with a penetration of 62 (1 / 10mm) and heat it to 155°C for use. Take the cationic emulsifier aminated lignin (RH-CO1) emulsifier 195g, anionic emulsifier sodium lauryl sulfate 125g, zwitterionic emulsifier N-lauryl-β-alanine 40g, non-ionic Type emulsifier 40g lauryl alcohol polyoxyethylene (20) ether, 3g hydroxyethyl cellulose, 25g magnesium chloride, dissolve together in 3373g of water at 55℃, after the emulsifier is fully dissolved, add sulfonated melamine formaldehyde condensate 25 g, 9 g of higher alcohol fatty acid ester (C18, concentration 30%), stir well, prepare a soap solution for later use and keep the temperature at 55°C. Then the soap and bitumen are transported to the colloid mill respectively, and after being evenly dispersed and ground by the colloid mill, it becomes an oil-in-water emulsion, and then flows out from the outlet of the system when the emulsion temperature is reduce...

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Abstract

The invention discloses a cement asphalt mortar and a preparation method thereof. The cement asphalt mortar includes emulsified asphalt, cement, fine sand, expansion agent, aluminum powder and water. The formula of emulsified asphalt includes asphalt, cationic emulsifier, anionic emulsifier, thickener, stabilizer, water reducer, defoamer, and water. The cement asphalt mortar of the present invention adopts special emulsified asphalt. When it is mixed with dry materials such as cement and fine sand, the water reducer and defoamer are easily dispersed evenly, fully contacted with dry materials, and the water reducing effect is obvious. At the same time, it can effectively avoid the bleeding phenomenon after CA mortar pouring, improve the workability of emulsified asphalt, cement and fine sand, improve the fluidity of CA mortar, and effectively eliminate large air bubbles, making CA mortar After molding, the texture is dense and uniform. The cement asphalt mortar of the present invention is particularly suitable for pouring under track slabs as a shock-absorbing buffer layer when building high-speed railways.

Description

technical field [0001] The invention relates to a cement asphalt mortar and a preparation method thereof, in particular to a cement asphalt mortar (abbreviated as CA mortar) poured under a slab ballastless track slab when building a high-speed railway and a preparation method thereof. Background technique [0002] With the improvement of the level of railway construction and the requirements for railway transport capacity, it is necessary to build high-speed railways and intercity light rails. In order to improve the stability of trains running at high speed and reduce the noise caused by vibrations when trains are running, slab ballastless track technology is adopted. The slab ballastless track technology is to lay two tracks on a reinforced concrete slab (called track slab), and a 3-5cm thick shock-absorbing layer needs to be laid under the track slab. The shock-absorbing layer is made of emulsified asphalt, cement, Fine sand and other mineral materials form cement asphalt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B28/04C04B26/26
Inventor 陈保莲张静范思远陈闯
Owner CHINA PETROLEUM & CHEM CORP
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