The hottest use of foam asphalt for cold recycling

2022-08-14
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Using foam asphalt for cold regeneration construction: a groundbreaking plan

using foam asphalt for cold regeneration construction: a groundbreaking plan

China Construction machinery information

the demand for resource-saving technology has reached an unprecedented high. Over the years, wittgens cold regeneration technology has been widely recognized - and it has met future standards

subgrade damage will occur on the pavement that has been subjected to heavy traffic for a long time. In order to eliminate this damage, the whole pavement needs structural maintenance. The full reuse of milled materials, coupled with its economic treatment method, makes the use of foam asphalt for cold recycling construction (the result of continuous research by wittgen company in the past 30 years) a groundbreaking solution - environmental protection and economy

mobile quick maintenance method of asphalt pavement

the construction method of cold regeneration with foam asphalt binder has been widely recognized all over the world. It has attracted more and more attention from road construction departments and construction companies in the maintenance of asphalt pavement. In this way, a durable flexible base course can be paved. As part of the pavement structure, they provide a solid foundation for the final thin asphalt surface. Foam asphalt is made of 175oc ordinary hot asphalt using advanced technology. During local regeneration, the accurately measured binder can be added to wittgen 2200 CR or 3800 CR cold regeneration machine or WR series cold regeneration and soil stabilization machine through the microcomputer controlled spraying system, and mixed with the recycled mineral aggregate. Therefore, the project can be completed quickly on the move

the use of foam asphalt can make the cold recycled mixture economically paved into a high-quality base

cold recycling construction is becoming increasingly common

the value of the cold recycling process has been confirmed worldwide. In actual construction, there are two different methods: using wittgen wheel or crawler type cold regenerator for local regeneration, or using wittgen KMA 220 mobile plant mix cold regeneration equipment for plant mix regeneration. These two methods can regenerate a variety of materials, such as milling asphalt concrete, crushed asphalt concrete, or new materials. Foam asphalt is widely used and can withstand extremely high traffic loads, as shown in the two examples of Brazil and Greece

foam asphalt and water are added to the mineral aggregate through different spraying systems

Brazil: the quality of recycled aggregate is higher than expected

more than 250000 vehicles pass on Ayrton Senna highway in Sao Paulo every day, of which the number of trucks accounts for 15%. The expressway was repaired in 2011. The milled asphalt pavement material was regenerated in wittgen plant mixing cold recycling equipment by adding foam asphalt, and then re paved into two layers (20+10 cm) by a paver. However, the experimental control software of the experimental machine needs to be able to generate word or excel reports, and then pave a 5 cm thick asphalt wearing course on it

Greece: the high bearing capacity lasted for more than 10 years

the highway between iliki in Corinth and Athens in Greece was cold recycled with foam asphalt from 2003 to 2004. These maintenance sections have been in effect for more than 10 years, with a daily traffic flow of 40000 vehicles, 25% of which are heavy vehicles

asphalt used to produce foam asphalt can be purchased all over the world

choose wittgens cold regeneration equipment and enjoy the first-class service of application technology experts

in order to obtain ideal results, a large number of preliminary tests need to be carried out on the whole pavement structure. At the same time, the mixture produced with foam asphalt must pass rigorous mixture design tests. Wittgen not only provides appropriate equipment for construction projects, but also provides comprehensive consulting services for customers anytime, anywhere. For example, wittgen's experts and road construction and maintenance engineers will provide on-site support and reasonable suggestions to customers. Wittgen's training course will also transmit deep-seated cold regeneration application expertise to customers

carry out a series of tests with the wlb10s laboratory asphalt foaming device to determine the performance of foam asphalt

wittgen cold regeneration laboratory equipment

New wlv1 laboratory vibration molding instrument

wittgen company has developed a new wlv1 laboratory vibration molding instrument for making test pieces. It is designed for cold regeneration applications. It can be used to make both large specimens for triaxial tests and small specimens for indirect tensile strength tests

wlv1 can make specimens of different heights

according to the test process, wlv1 can make specimens of different heights. Then, their quality is determined by indirect tensile strength test

wlm30 Laboratory Mixer

wlm 30 laboratory mixer can determine the most ideal mixture proportion, and make different mixture formulas in a very short time. Wlm30 has a capacity of 30kg and can set different mixing speed and mixing time

wlm3c with a capacity of about 30kg Checking the tightness of the screw drive chain every 6 months will bring extreme tension to the raw materials. An important feature of the double horizontal shaft forced mixer is its extremely high mixing strength

wlb10s laboratory asphalt foaming device

the quality of foam asphalt can be determined by a preliminary test using wlb10s laboratory asphalt foaming device before construction. Its operation is very simple, and it can quickly change the test parameters such as water volume, pressure and temperature

wlb10s laboratory asphalt foaming device optimizes the foaming process by adjusting temperature and adding water

what is foam asphalt? How is it made

foam asphalt is made by spraying a small amount of water and air into the hot asphalt under high pressure. The evaporation of water is in the high-end market; And our fixture will promote the rapid expansion of asphalt, and the volume will become 15-20 times of the original. Then, the foam asphalt is sprayed into the mixing pot through the nozzle and ideally mixed with the cold recycled material. The quality of foam asphalt is mainly described by two parameters, "expansion rate" and "Half-Life". The larger the expansion rate, the longer the half-life, the more evenly dispersed the foam asphalt in the recycled material, and the stronger its adhesion

foaming process

the foaming process is carried out in the expansion chamber, and water and air are sprayed into the hot asphalt (160 ℃ - 180 ℃) under the pressure of 5bar

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