winter Archives

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.

surface treatments and winter

Reviewing the notes from previous years, we are When winter with a recurring theme. The gravillados in winter and care must be taken to prevent landslides.

This year is no exception, exactly the opposite, there is more surface treatments works underway in all previous years and landslides came in several of them.

Como siempre, la primera culpable es la emulsión, que es exactamente la misma que se usó días anteriores, con 10 o 15°C mas y no hubieron inconvenientes. Debemos entender que la veda que dispone el Pliego de Vialidad tiene su fundamento técnico en evitar estos desprendimientos si se trabaja de forma “tradicional” ya que las condiciones de curado de las emulsiones se ven seriamente modificadas con el frío.

Moreover, we note with pride that works in which they have implemented multiple treatments Latched (TMT®) and has been used exactly the same emulsion in defective works, do not have a single stone detachment.

We leave the note describing best practices to avoid problems of landslides in winter: SEVEN RECOMMENDATIONS FOR USE OF EMULSIONS IN WINTER

We recently implemented TMT® in several plays and come behaved very satisfactorily. We can highlight a stretch of Route 23 and Route 94 by Eduardo Martinez, also CVC on Route 8 and Route 96. Cujo in All these works were carried out with emulsions in May and have had no problems.

For more information about running TMT® contact our technical department on 0800 8425.

We attach some photos of the above sections.

SEVEN RECOMMENDATIONS FOR USE OF EMULSIONS IN WINTER

21 June 2016
in: Emulsion,modified emulsions,Bitafal group,winter,News,technology

When they start to shorten the days and appear the first cold start problems with the use of emulsions. This situation is repeated year after year and often turns into a spiral of construction problems that last for months if the corresponding precautions are not taken.

Being a recurring theme which we have learned to solve these years, we bring our 7 recommendations regarding the selection of products and ways of implementation to work in cold weather conditions.

While asphaltic emulsions have minimal restrictions on use in winter, since moisture of the aggregate is not counterproductive, if it is imperative that the embodiment in winter is different from the traditional, to avoid problems of detachment during execution and prevent exudates which cause in the first warm days of spring and every year we complained.

Las emulsiones catiónicas cortan por desbalance de cargas eléctricas y no es selectivo de verano o invierno, así que SIEMPRE cortan. Luego del corte existen diversos procesos dentro de la emulsión como coalescencia y curado, en el cual el agua de la emulsión debe evaporar para lograr la cohesión necesaria del asfalto residual con la piedra y así evitar desprendimientos prematuros.

Said above it is evident that the moisture retained in the system due to the low evaporation during winter, the aggregate / asphalt affinity is less. Subject usually solved from the viewpoint of performance as long as the maximum temperatures are above 10 ° C, otherwise it is not advisable to use emulsions until maximal exceed that temperature.

1) IMPROVE THE RESISTANCE OF THE MATRIX OF ARIDAchieve the stone is held in place by mechanical locking means.

When working on granular bases, use a heavy cylinder for driving the aggregate in the base and thus prevent detachment traffic. These solutions have drawbacks because if the stone is not large enough gaps may be affected and when summer comes the binder has nowhere to expand and asphalt appears on the surface. But if you plan to make a second irrigation or sealed future.

* If simple treatment, can be made the same in two passes with half the components in each pass, making the initial half containing emulsion below and above and the second irrigation achieved get into the gaps of the first giving a stone matrix closed using a heavy compactor.

* In case of a double treatment, perform the two executions on the same day to achieve the same closed die from the outset.

2) START very early: You must run risks in the winter mornings, once that blunts the sun. Recall that the emulsions cut by decompensation loads and we need all available hours of evaporation.

3) terminate PAST PERFORMANCE NOON: Watering must be discontinued after noon for a time sufficient evaporation in the last application so that when night came, the system achieves sufficient to withstand uncontrolled traffic cohesion.

4) heat more EMULSIONS: Si el problema es el agua retenida en el sistema luego del corte, podemos ayudar al proceso de curado si calentamos la emulsión entre 80 y 95°C para que el agua evapore mas rápidamente. Con las actuales emulsiones de RIEGO de BITAFAL no hay inconvenientes de escurrimiento debido a las altas viscosidades de las mismas incluso a temperaturas de 95°C. Además al ser en base a agua no existen riegos de incendio o explosión como si existe con el uso de diluidos.

5) AVOID AGGREGATES DIRTY: This recommendation is for all types of surface treatment but when the weather is good, you can moisten a dirty arid for the emulsion works well. That is not the case in winter where we seek to reduce the amount of water in the middle. With a dirty arid the emulsion will only adhere to dust causing peeling even if it is fully cured. (Especially if it is very hot)

6) ENABLE TRAFFICKING AND CONTROLLED EARLY FORM: Controllably release traffic (maximum speed 30 km / h) once finished the compaction in the early hours of the afternoon. There if we need the air traffic for the purpose of purging the system drops of water released from the residual asphalt and aggregates collaborate to lock each watering done.

7) USE OF EMULSIONS SUITABLE TO SITUATION: SPECIAL BITAFAL ASFALTOS emulsions prepared with different hardnesses of the waste and with different degrees of modification. Please find attached our table recommendations by type of work to be done, the area of the country and the time of year.

LIMITATIONS these recommendations:

Although it is possible to work during cold periods we not recommend performing work during the winter if:

1) highest temperatures all day do not exceed 10 ° C.

2) monogranular Treatments applied on hard surfaces such as concrete or asphalt layers and where traffic speed is greater than 75 km / h.

3) Surface treatments applied on very soft bases without adequate granulometry, as silts the coast, where a burial arid irrigation A occurs, reducing gaps and subsequent exudation.

Category Archives: winter Archives - Bitafal

Category Archives:
winter Archives - Bitafal