Surface treatment Archives

VIRTUAL COURSE “Surface treatments and asphalt primer”

On Thursday, May 20 and Friday, May 21, we had the pleasure of attending the virtual course on "Surface treatments and asphalt primer" organized by the Bolivian company Quimitec Asfaltos. The webinar, by Prof. Edson Andrade and Ing. Daniel Zenteno, discussed important aspects on the execution of asphalt primer and surface treatments, developing the concepts and manufacturing procedures for emulsions and construction procedures for these techniques.

On Friday, Ing. Ignacio Kröger spoke about the importance of a good penetration in the primer. For this, the porosity and humidity conditions of the base, and the viscosity and strength of the binder were detailed. Likewise, the need to progressively eliminate the use of asphalt dilutes in paving in general and in priming specifically was discussed.

To summarize, the four main disadvantages presented by the dilutes are detailed below:

1) Contains volatile gases that are toxic to workers.

2) Impact on the greenhouse effect and reduction of the ozone layer.

3) It requires energy for heating, which in addition to being expensive, requires valuable time. It can also create a risk of overheating and explosion of tanks, like the two accidents we had in our country last year.

4) After 72 hours of applying a dilute type MC1, it still has between 55 and 85% of the solvent. Risk of softening binder of future treatment and oozing in summer.

The IMPRIMA 50 emulsion for its part is a mixture of asphalt and water, and this brings great technical and environmental advantages:
1) Quick release to traffic, without the need to prime with sand. This allows paving tasks to be carried out in the following 12 and 24 hours.

2) Low viscosity at room temperature (at 25 degrees it has the same fluidity as at 60 of the diluted). Quick loading of a sprinkler truck and without the need for heating.

3) Releases water to the environment instead of volatile organic compounds (less dangerous for workers and the environment).

4) It is compatible with other emulsions, therefore it does not generate inconveniences in its manipulation.

For more information about the performance comparison between the emulsion and the diluted primer, you can consult the technical work presented by Quim. Santiago Kröger at the IX Uruguayan Road Congress "Primer with emulsions: technical and environmental improvements."

https://bitafal.com.uy/wp-content/uploads/2017/10/9%c2%ba-CVU-Trabajo-Imprimaci%c3%b3n-con-emulsiones-mejoras-t%c3%a9cnicas-y-ambientales.pdf

We thank Quimitec Asfaltos for the invitation, and hopefully it will be the first of several collaborations between the two companies.

VEDA IN Surface treatments

With the imminent entry of autumn, we should take the necessary precautions in the execution of surface treatments.

The ban begins in a few days and the most suitable for our summer climate emulsions begin to generate low yields in the execution by the cold and the few hours of insolation that we are already living.

Asphalts specifications based emulsions remain unchanged throughout the year. If the manufacturer wants a change in specifications to continue the work, we do get an email with the desired specification.

We recall that in remitos load the batch number corresponding detailed, and which can enter our website to have the Quality report and to corroborate with the requested specifications.

To maintain the quality of the works must run less meters per day before releasing traffic with some specific recommendations always looking to reduce the amount of water in the system.

We invite you to know in detail the recommendations on the following link "SEVEN RECOMMENDATIONS FOR USE OF EMULSIONS IN WINTER"

surface treatments:

1) heating the emulsion to be used above 70 ° C to promote evaporation of water from the emulsion itself.

2) Do not wet aggregates and try to use the top in the collection that are drier and drained, not load the gathering at the bottom.

3) Start the task early in the morning, regardless of the prevailing temperature, for that tranche has executed the most hours of exposure to air, wind and sun.

4) Apply TMT technologiesThat favor locking of aggregates applied, achieving superior quality and finish.

5) Have properly calibrated equipment graveled and irrigation to the quality objective is sought to be achieved.

Irrigations primer:

In these autumn and winter periods irrigation primer they are affected by the high rate of humidity in the foundations.

It must be respected as well as primers with dilute MC 1, optimum moisture application for the purpose of achieving a successful work.

By the above, it is normal for a primer in summer takes less than 1 hour in winter takes more than 24 hours to get to be acceptable.

Soil stabilization:

It is best suited to perform soil stabilization with cement or lime period.

Water needs hydration are very basic and profiling work, compaction and sealing are unmatched.

Here the sealing emulsion IRRIGATION BITAFAL 65 at 1 per square meter lt should be complemented with a sealed with quarry dust good quality.

These bases have such successful results supporting several months before recommencing graveled tasks in appropriate months.

It IS NOT WHAT THEY SAY ...

During February we conducted two tours of much of the country to see how surface treatments behaved during the summer.

After having traveled more than 2800 km were able to verify that the problems of exudation that both resonated in the press and in the environment, are actually a small part of what has been done in recent months across the country.

We could risk to quantify the problem areas and we do not exceed 2 or 3% of total executed.

Exudation is fully controlled and are the result of a sum of different errors, based not only attributable to asphalt emulsions. We have traveled sections executed with national emulsions, RC2 or imported emulsions, and in all cases there exudates sections. A common denominator of most of them is running during the winter without the necessary precautions.

The emulsions BITAFAL ALWAYS comply with the current specification DNV which includes a penetration range of 50 to 200 dmm and we subdivide into soft, medium and hard to adjust to the realities of each work.

Every summer we adjusted basis or hard asphalts media but from now on is the quality of asphalt base will maintain throughout the year. Only order will manufacture soft asphalt emulsions that way unless there is a variable in the appearance of exudates.

You can read some recommendations to reduce the appearance of exudates below:

To prevent exudates is essential to work in good weather conditions to ensure proper curing of the emulsion without risk of premature detachment and redo work force overdosing asphalt.

If you have to work during the closure take the precautions mentioned in note below.

Other factors are very soft exudation base surface allowing penetration of the aggregate A treatment and reducing the proportion of several necessary. The same applies to well-graded aggregates that fill the gaps for the asphalt emulsion.

The lack of a suitable dosage criteria, use the same "recipes" for all treatments running and lack of calibration of equipment are key components for the job fails.

Aggregates with high dust content are also a problem because the reduced active adhesion usually increase the dosage asphalt irrespective of subsequent consequences.

Must professionalize dosage calibration, the release of the basis for treatments and especially the aggregates used.

Treatment well executed, even with soft emulsions, may not have bleeding problems ... and many kilometers executed last winter with soft emulsions which did not have problems when they reached the heats.

Great book launch Bitafal Group

Already circulating in the offices of construction companies, and city halls, classrooms under construction and the first edition of the book "High Performance Surface Treatments"

On the morning of November 5, 2018, the book launch was held at the Regency Park Hotel in Jacksonville - Zonamerica between 9.00 and 12.00. With a call for more than 280 people they participated from engineers and project managers of departmental governments of Uruguay, builders and suppliers of national roads, apprentices and students up to grade engineering career.

Luego de la llegada de los invitados y habiendo tomado un desayuno comenzó la exposición con palabras de bienvenida a cargo de Claudio Kröger agradeciendo a los asistentes y a todo el equipo que hizo posible este texto. Seguidamente se pasó a la presentación del libro a cargo de Santiago e Ignacio Kröger, quienes profundizaron en los motivos y objetivos del mismo, y un paneo de los capítulos y su contenido.

Finalmente se abrió una mesa de debate con referentes de la vialidad nacional y quienes tuvieron la noble tarea de leer el libro previo a su impresión para realizar anotaciones, comentarios y aportes. El panel contó con la moderación de Ing. Gerardo Fernandez por parte de la Asociación Uruguaya de Caminos y debatieron el Ing. Horacio García Terra, Ing. Arturo Forteza, Ing. Magdalena Pastorini y Qco. Santiago Kröger, con participación de preguntas del público.

We thank all those who came to this launch marks a before and after in generating content of theoretical and practical value for national and regional roads.

Evaluation of penetration of the aggregate in the bases for surface treatments

Using the penetrometer ball as quality control element base treatment.

In the path that is being traced at the national level to standardize design criteria for surface treatments, we believe the inclusion of the ball penetrometer test is of utmost importance. It determines if the base is in proper condition to receive initial treatment, or if it requires additional work. It is also an indicator of the degree of compaction that has been achieved and the moisture contained in the base. The test was originally developed by South Africans and is also used in Australia and New Zealand to quantitatively measure the penetration potential of aggregate into the base.

En este frío mes de Agosto, junto con Lucio Borelli de CVC, pusimos a prueba este equipo de medición en diversas superficies: bases granulares no ligadas, bases estabilizadas con ligantes (cemento Portland y asfalto espumado) y mezclas asfálticas. A continuación se ilustran algunas de las conclusiones, acompañadas de fotos de la experiencia.

In the initial treatments (surface treatments on bases), the subsidence of the aggregate on the surface always occurs, to a greater or lesser extent. The degree of penetration will depend on the base material, its humidity, compaction and the traffic to which it will be subjected. Not taking these parameters into account results in exudate in the short term, becoming particularly evident in the tracks. The explanation for this phenomenon is intuitive: the tire pressure sinks the stone into a base that allows it and the voids that correspond to the asphalt and the air (to achieve the macrotexture of the wearing course) are occupied by the material of base, causing the asphalt to surface through the stone, which results in exudation in the tracks.

El ensayo que se propone es muy sencillo y de fácil aplicación: consiste en la penetración de una bola de 19 mm de diámetro que es golpeada por un martillo normalizado lanzado de una altura conocida (Australian Standards: AG-PT/T251 – Ball Penetration Test). El valor de penetración queda registrado en el aparato, ya sea en un indicador electrónico o en una regla graduada (que viene incorporada).

Los resultados de este ensayo se utilizan para ajustar la cantidad de ligante a regar o para seleccionar un tratamiento correctivo previo al definitivo. Su uso más importante es quizá el de establecer el límite en el que no se pueden realizar gravillados sin antes recompactar o estabilizar la base, dado que su riesgo de falla es muy elevado.

La primera y más importante de las conclusiones es que la preparación de la base es un factor determinante en los resultados. Un problema común es que las bases presentan un exceso de finos en la parte superior que genera que la bola penetre con facilidad. Aunque parecen estar lisas y homogéneas inicialmente, tan pronto como se barren, una gran cantidad de este material fino se dispersa, dejando una superficie áspera e inconsistente que es problemática para ejecutar un tratamiento.

Another issue to consider is the humidity at the time of the test: if the surface is visibly wet, the penetration gives higher values. We could corroborate this by testing the same surface early in the morning and close to noon. In some cases, the conditions of the base at the time of the test are good, but when a primer is applied, due to capillarity and temperature differences, humidity begins to increase in the first 5 cm, affecting the penetration result.

Developing

EMULSIONES BITAFAL IN WORK

emulsions IRRIGATION BITAFLEX 65 polymer modified P12, P25 and P40 and the 50 PRINT BITAFAL They are having a great performance in all works of surface treatment that is using the different areas in the country both in their application and end use.

They have good viscosity to prevent runoff and once in contact with the aggregate achieve high cohesion within minutes. The asphalt binder, adjusted penetration according to the time of year when we are working and the area of the country where the work is executed, is further modified with elastomeric polymers that provide excellent resistance to traffic and weather.

The hundreds of km of works in major routes as 10, 13, 15, 19, 20, 23, 26, 45, 57, among others, are witness to the above and shown BITAFAL engagement with Uruguay road.

We invite you to view images of some of the newly built surface treatments.

THE IMPORTANCE OF PORTLAND CEMENT STABILIZED.

Our company in 2013 introduced the first Uruguay Wirtgen WR2000 stabilizer knowing that coming times of change in our industry due to increasingly tight budgets to meet a growing demand for road maintenance.

Moreover, the provisions of Dinama and Dinamige for quarrying are increasingly restrictive implying that these technologies, reuse of existing materials, are here to stay.

The more than 14 machines that are operating in our place to prove it. more economic and lasting foundations are achieved using existing materials and also with yields never imagined execution.

This technology allows us to think of other alternatives for pavement design, especially in the surface layers, which are not disseminated by the lean life they had in defective granular bases.

It's not new, but We are convinced that the foundations of our roads are the foundation and the life of asphalt which we place on them.

It is our vocation known surface treatments, very successful experience in new binders and search for new alternatives of implementing them prove it.

It is a technology that fits perfectly with the costs that Uruguay can pay for your roads and excellent cost / benefit based on traffic routes we have in our relationship.

We are studying sion All manual published in the roads of Australia, New Zealand and South Africa where more than 90% of the kilometers are executed surface treatments and where they used the stabilized with cement massively.

This work is being developed thoroughly and bringing it closer to the realities of this side of the southern hemisphere to transmit knowledge to the sector being adquiriendo.Prontamente be informing them about the progress of this work.

EXCELLENT PERFORMANCE IN chiping Route 8

30 March 2017
in: rutting,Chiping,News,route 8,served,Superficial treatment

With more than a year in service, the 23 Km of Chiping made in Route 8 for Serviam S.A. distributed between km 209 and 235 behave impeccably fulfilling the objectives set out in its application.

Cal (2)

As for existing defects, they are very specific and easily solvable. Specifically, the final stretch of about 900 m which took place near the very long winter we suffered in 2016, the arid fell off prematurely, leaving an excess content asphalt surface coinciding with the existing tracks in the driveway.

To rehabilitate recently decided that surface making a chip seal 5 to 14 mm in traces low emulsion and then placed on the same day with the chiping aggregate 5-10 mm across the width of the road and the corresponding irrigation emulsion fog BITAFLEX IRRIGATION 65 P40 D prepared with hard asphalts.

In this way it was possible to correct the existing rutting, excess asphalt surface was controlled and good macrotexture and a uniform finish with the rest of the section made last year was achieved.

We invite you to watch the pictures chiping status and recent stretch made.

ALL PHOTOS HERE

Exchange table with departmental governments

On July 26 colleagues Quartermaster Cologne approached salons CITEVI shared-time exchange with a focus on current needs and challenges that present themselves to technical and economic level for the municipalities and their jobs from construction vial.

an interesting talk, where they were addressed among others the following topics generated:

* The current problems of rural roads and how to address it in a sustainable manner;

* Final technical solutions as stabilized soil cement;

* Benefits of primer emulsions;

* Surface treatments and the experience in New Zealand;

* New modified asphalts and their applications.

Hoping it will be of interest to other municipalities, we extend the invitation to participate, you can write to lucia@bitafal.com.uy to coordinate day and number of participants. If you wish to address a subject that is not in the proposal, we are open to inclusion and thus answer questions.

MAS PHOTOS HERE

WORKSHOPS CYCLE WITH Intendencias

This year we return to the cycles of technical workshops with departmental governments to discuss various topics paving technology. A classic workshops a few years ago on the use of emulsions, best practices for surface treatments and cold mix to add bacheo improved bases by in situ stabilization and paving new technologies.

It is a day of sharing experiences accompanied laboratory tests to better understand the management of asphalt products.

We started this month with the visit of the Municipality of Cologne. We invite you to participate in upcoming editions communicating mail: bitafal@bitafal.com.uy

TRAINING INTENDENCIA COLONIA_ MARCH 2011

Category Archives: Surface treatment Archives - Bitafal

Category Archives:
Surface treatment Archives - Bitafal