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Method for preparing emulsified asphalt slurry

A technology for emulsification of asphalt and mortar, applied in the field of mortar, can solve the problems of in-depth research and unsatisfactory construction performance, and achieve the effects of no particles in appearance, increased strength, and improved workability

Active Publication Date: 2011-06-01
CHINA TIESIJU CIVIL ENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, my country has begun to study emulsified asphalt mortar. However, from the relevant academic papers and research documents published in China, as well as the published Chinese patent documents, in terms of emulsified asphalt formula, mortar mix composition and its influence on mortar construction performance There is no in-depth research on the impact, and it is far from meeting the needs of vigorously developing high-speed railway construction in China and meeting the characteristics of domestic construction

Method used

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  • Method for preparing emulsified asphalt slurry
  • Method for preparing emulsified asphalt slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1), Preparation of No. 1 intermediate product: add 50kg lignin, 65kg alkylamine, 70kg nonylphenol polyoxyethylene ether, and 25kg fumed silica into 4800kg of warm water at 65°C, stir and dissolve, and add appropriate amount of hydrochloric acid to adjust The pH value is 2-3 to form the No. 1 emulsion. The No. 90 petroleum pitch at 150°C and the No. 1 emulsion are sent to the high-speed grinding emulsifier in a ratio of 6:4. The pump pressure of the emulsifier is controlled at 0.1-0.3MPa. Mix and grind to obtain No. 1 intermediate product;

[0029] (2), preparation of No. 2 intermediate product: 280kg volcanic rock type bentonite is added into 4600kg 65 ℃ warm water and fully stirred, and puffed for 4 hours, then add 80kg fumed silica stabilizer, and add appropriate amount of citric acid to adjust the pH value 3-5 to form the No. 2 emulsion, send No. 90 petroleum asphalt at 130°C and No. 2 emulsion into the high-speed shear emulsifier at a ratio of 4.5:5.5, and the pump...

Embodiment 2

[0032] Weigh 4413g of emulsified asphalt prepared in Example 1, add 630g of polymer emulsion, 256g of water, and 1.6g of defoamer, and stir for 30s with a paddle mixer at a speed of about 60rpm;

[0033] After stirring for 30s, at the same speed, put 2837g of cement, 315g of expansion agent, 0.43g of aluminum powder, 6304g of artificial sand and 79g of air-entraining agent into the stirring pot in sequence;

[0034] After all the feeding is completed, adjust the speed of the mixer to 210rpm, and start the high-speed stirring process, and the time is about 3-4min. After completion, indicators such as mortar fluidity and air content can be measured. If the indicators are qualified, samples will be taken for compressive strength testing. The sample size is a φ50mm×50mm cylinder; if the fluidity or air content is insufficient, add water or increase the amount accordingly. High speed mixing time. After the mortar is adjusted to pass the test for 30 minutes, test the fluidity again...

Embodiment 3

[0039] Weigh 543 kg of emulsified asphalt prepared in Example 1, add 16 kg of tap water, 197 g of defoamer, and 78 kg of polymer emulsion, and stir with a turbine mixer at a speed of about 40 rpm;

[0040] After stirring evenly, increase the rotating speed to 100rpm, and put 39kg of expansion agent, 350kg of cement, 776kg of sand, 64g of aluminum powder, and 4.9kg of air-entraining agent into the stirring pot in turn;

[0041] After all the feeding is completed, adjust the speed of the mixer to 120rpm, and stir at high speed for 5-7 minutes. After the completion, the indicators such as mortar fluidity and air content can be measured. If the indicators are qualified, samples will be taken for compressive strength testing. The sample size is a φ50mm×50mm cylinder; if the fluidity or air content is insufficient, add water or increase the amount accordingly. High speed mixing time. After the mortar is adjusted and qualified, the test is repeated at intervals of 10min-20min to obs...

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Abstract

The invention discloses a method for preparing emulsified asphalt slurry. The emulsified asphalt slurry is formed by mixing and stirring emulsified asphalt, artificial sand, water, 40-50% acrylic emulsion, sweller, air entraining agent, defoaming agent and aluminum powder; the emulsified asphalt is formed by mixing emulsified asphalt 1# intermediate product and emulsified asphalt 2# intermediate product, adding stabilizer gas silica and evenly mixing; the emulsified asphalt 1# intermediate product is formed by mixing and grinding 1# emusifier prepared by adding water to asphalt, lignose, alkylamine, gas phase silica and polyoxyethylene derivative; and the emulsified asphalt 2# intermediate product is formed by mixing and grinding 2# emusifier prepared by adding water to asphalt, volcanic type amargosite. The emulsified asphalt slurry of the invention is high in strength, plump in pouring, simple in preparation method, low in raw material cost and perfect in construction performance.

Description

technical field [0001] The invention relates to the field of mortar, in particular to a method for preparing emulsified asphalt mortar. Background technique [0002] Emulsified asphalt mortar is a key component of elastic adjustment layer of high-speed railway slab ballastless track structure. It is made by mixing raw materials such as emulsified asphalt, 40-50% acrylic emulsion, cement, CSA expansion agent, sand, water, air-entraining agent, defoamer, aluminum powder, etc. through special processes. It utilizes cement water absorption and hydration to accelerate the demulsification of emulsified asphalt. A three-dimensional network structure is formed by cement hydrate and asphalt-coated sand. The formed emulsified asphalt mortar can play a dual role of adjusting the geometric accuracy of the track and absorbing vibration and impact energy. The construction quality of emulsified asphalt mortar directly affects the appearance, performance and service life of the finished p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B28C5/08B28C7/04C04B28/00
CPCC04B2111/70C04B40/0046C04B28/02C04B20/06C04B26/26C04B2111/0075Y02W30/91C04B18/146C04B18/24C04B24/121C04B24/32C04B24/36C04B40/0057C04B7/00C04B14/06C04B14/16C04B22/008C04B22/04C04B24/2641C04B38/02C04B40/0028C04B2103/0094C04B2103/304C04B2103/50C04B22/062C04B14/14C04B14/104
Inventor 闫子才宿万黄玉华王宇峰黄海
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD
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